Document and Entity Information [Abstract] Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Entity Public Float Entity Current Reporting Status Entity Voluntary Filers Entity Well-known Seasoned Issuer Consolidated Balance Sheets [Abstract] Assets Abstract ASSETS Cash and cash equivalents CASH AND CASH EQUIVALENTS, End of year CASH AND CASH EQUIVALENTS, Beginning of year Cash and Cash Equivalents, at Carrying Value, Total Short-term investments Short-term Investments, Total Accounts receivable, net Calc Accounts receivable Accounts Receivable, Net, Current, Total Inventories Presentation Inventories Total inventory Prepaid Expense and Other Assets, Current Prepaid expenses and other Prepaid Expense and Other Assets, Current, Total Total current assets Total current assets PLANT AND EQUIPMENT: Buildings and Improvements, Gross Buildings and Improvements, Gross, Total Land, buildings and improvements Machinery and Equipment, Gross Machinery and Equipment, Gross, Total Machinery and equipment Construction in Progress, Gross Construction-in-process Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Plant and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less-Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Less-Accumulated depreciation and amortization Plant and Equipment, net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance PLANT AND EQUIPMENT- NET Plant and equipment, net OTHER ASSETS Long-term investments Long-term Investments, Total Patents and other assets, net Intangible Assets, Net (Excluding Goodwill), Total Other Assets, Noncurrent Total other assets Assets Total assets Assets LIABILITIES AND SHAREHOLDERS' INVESTMENT Accounts payable Accounts payable Accounts Payable, Current, Total Accrued liabilities: Employee-related Liabilities, Current Employee-related Liabilities, Current, Total Salaries, wages and vacation Accrued Royalties, Current Royalties Dividends Payable, Current Dividends declared Other Accrued Liabilities, Current Other Total current liabilities Total current liabilities DEFERRED INCOME TAXES SHAREHOLDERS' INVESTMENT: Preferred Stock, Value, Issued Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred stock, no par value, 5,000,000 shares authorized; none issued or outstanding Common stock, par value $.06 per share; 200,000,000 shares authorized; 142,292,127 shares issued and outstanding in 2010 and 138,339,385 shares issued and outstanding in 2009 Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock Common Stock, Value, Issued, Total Common stock, par value $.06 per share; 200,000,000 shares authorized; 144,069,563 shares issued and outstanding in 2011 and 142,292,127 shares issued and outstanding in 2010 Additional paid-in capital Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Retained earnings Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated other comprehensive income: Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Beginning Balance Unrealized gain on investments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance Cumulative translation adjustment Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total shareholders' investment Liabilities and Stockholders' Equity Total liabilities and shareholders' investment Preferred Stock, No Par Value Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued, Total Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Shares, Outstanding Ending balance, shares Beginning balance, shares Common stock, shares outstanding Consolidated Statements Of Income [Abstract] NET SALES Revenue Sales Revenue, Goods, Net, Total Cost of Goods Sold COST OF GOODS SOLD COST OF GOODS SOLD Gross profit Gross profit OPERATING EXPENSES: Engineering, research and development Engineering, research and development Selling, general and administrative Selling, general & administrative Operating Expenses Total operating expenses Operating Income (Loss) Operating income Income from operations Income (Loss) From Operations OTHER INCOME (EXPENSE) Investment Income, Investment Expense Investment income Investment income Investment Income, Nonoperating, Total Impairment loss on available-for-sale securities Impairment loss on available-for-sale securities Other than Temporary Impairment Losses, Investments, Total Other Nonoperating Income (Expense) Other, net Other, net Nonoperating Income (Expense) Total other income (expense) Income before provision for income taxes Income before provision for income taxes Income Tax Expense (Benefit) PROVISION FOR INCOME TAXES Provision for income taxes Provision for income taxes Net income Net income NET INCOME Numerator for both basic and diluted EPS, net income Earnings Per Share [Abstract] EARNINGS PER SHARE: Basic Basic Diluted Diluted Cash Dividends Declared per Share Dividends declared per share Consolidated Statement Of Shareholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member] Common Stock [Member] Common Stocks [Member] Additional Paid In Capital [Member] Additional Paid-In Capital [Member] Comprehensive Income [Member] Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Issuance of common stock and the tax benefit of stock plan transactions, shares. Issuance Of Common Stock And The Tax Benefit Of Stock Plan Transactions, Shares Issuance of common stock and the tax benefit of stock plan transactions, shares Issuance of common stock and the tax benefit of stock plan transactions, value. Issuance Of Common Stock And The Tax Benefit Of Stock Plan Transactions, Value Issuance of common stock and the tax benefit of stock plan transactions Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock Stock based compensation expense related to employee stock options, employee stock purchases and restricted stock Share-based Compensation, Total Dividends Payable, Amount Dividends declared Dividends declared Comprehensive income: Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on investments, net of tax Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income Comprehensive income Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized gain (loss) on investments, tax Condensed Consolidated Statements Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization Depreciation, Depletion and Amortization, Total Depreciation & Amortization Gain Loss On Disposition Of Assets (Gain) loss on disposal of assets Loss on disposal of assets Gain (Loss) on Disposition of Assets, Total (Gain) loss on sale of investments Gain on sale of investments (Gain) loss on sale of investments Gain (Loss) on Sale of Investments, Total Gain on sale of investments Loss on Sale of Investments Loss on sale of investments Deferred Income Tax Expense Benefit Deferred income taxes Deferred Income Tax Expense (Benefit), Total Excess Tax Benefit From Share Based Compensation Operating Activities Excess tax benefits from stock based compensation Excess tax benefits from stock-based compensation Change in operating assets and liabilities: Accounts receivable Accounts receivable Accounts receivable, net Increase Decrease In Inventories Inventories Inventories Increase (Decrease) in Inventories, Total Increase Decrease In Prepaid Deferred Expense And Other Assets Prepaid expenses and other Prepaid expenses and other Increase (Decrease) in Prepaid, Deferred Expense and Other Assets, Total Increase Decrease In Accounts Payable Accounts payable Accounts payable Increase (Decrease) in Accounts Payable, Total Accrued liabilities, excluding dividends declared Accrued liabilities, excluding dividends declared Accrued liabilities, excluding dividends declared Accrued liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities CASH FLOWS FROM INVESTING ACTIVITIES: Proceeds from Sale of Available-for-sale Securities Proceeds from Sale of Available-for-sale Securities, Total Activity in available-for-sale securities: Sales proceeds Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Activity in available-for-sale securities: Maturities and calls Payments to Acquire Available-for-sale Securities Activity in available-for-sale securities: Purchases Payments to Acquire Available-for-sale Securities, Total Purchases of available-for-sale securities Payments to Acquire Productive Assets Plant and equipment additions Plant and equipment additions Payments to Acquire Productive Assets, Total Capital Expenditure Proceeds from sale of plant and equipment Proceeds from sale of plant and equipment Decrease (increase) in other assets Decrease (increase) in other assets (Increase) decrease in other assets Net Cash Provided by (Used in) Investing Activities Net cash provided by (used for) investing activities CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from Issuance of Common Stock Issuance of common stock from stock plan transactions Payments Of Dividends Common Stock Cash dividends paid Cash dividends paid Excess Tax Benefit From Share Based Compensation Financing Activities Excess tax benefits from stock based compensation Cash dividends paid Excess tax benefits from stock-based compensation Excess tax benefits from stock based compensation Net Cash Provided by (Used in) Financing Activities Net cash used for financing activities NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Summary Of Significant Accounting And Reporting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting And Reporting Policies Line Of Credit [Abstract] Long-term Debt [Text Block] Line Of Credit Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Employee Benefit Plan [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plan Stock-Based Compensation Plans [Abstract] Disclosure Of Compensation Related Costs Share Based Payments Text Block STOCK-BASED COMPENSATION PLANS Stock-Based Compensation Plans Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Contingencies Segment Reporting [Abstract] Segment Reporting Disclosure TextBlock SEGMENT REPORTING Segment Reporting Consolidation, Policy [Policy Text Block] Consolidation Cash and Cash Equivalents, Policy [Policy Text Block] Cash Equivalents Allowance For Doubtful Accounts [Policy Text Block] Allowance For Doubtful Accounts [Policy Text Block] Allowance For Doubtful Accounts Investment, Policy [Policy Text Block] Investments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Of Financial Instruments Inventory, Policy [Policy Text Block] Inventories Property, Plant and Equipment, Policy [Policy Text Block] Plant And Equipment Impairment or Disposal of Long-Lived Intangible Assets, Impairment, Policy [Policy Text Block] Impairment Of Disposal Of Long-Lived Assets Patents [Policy Text Block] Patents [Policy Text Block] Patents Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Advertising Costs, Policy [Policy Text Block] Advertising And Promotional Materials Maintenance Cost, Policy [Policy Text Block] Repairs And Maintenance Self Insurance [Policy Text Block] Self Insurance [Policy Text Block] Self-Insurance Standard Product Warranty, Policy [Policy Text Block] Product Warranty Income Tax, Policy [Policy Text Block] Income Taxes Earnings Per Share, Policy [Policy Text Block] Earnings Per Share Other Comprehensive Income Loss [Policy Text Block] Other Comprehensive Income Loss [Policy Text Block] Other Comprehensive Income (Loss) Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Translation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation Plans Use of Estimates, Policy [Policy Text Block] Estimates Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule Of Allowance For Doubtful Accounts Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Investment Securities Stated At Fair Value Schedule Of Assets Or Liabilities Having Recurring Measurements Unrealized Gain (Loss) on Investments [Table Text Block] Schedule Of Amortized Cost, Unrealized Gains And Losses, And Market Value Of Investment Securities Schedule of Unrealized Loss on Investments [Table Text Block] Schedule Of Unrealized Losses On Investments Maturities Of Fixed Income Securities [Table Text Block] Schedule Of Contractual Maturities Of Fixed Income Securities Schedule of Inventory, Current [Table Text Block] Schedule Of Inventories Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] Schedule Of Earnings Per Share Basic And Diluted Tabular disclosure of the change in unrecognized tax benefits. Schedule Of Unrecognized Tax Benefits Rollforward [Table Text Block] Schedule Of Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule Of Components Of Provision For Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule Of Effective Income Tax Rates Different From Statutory Federal Income Tax Rates Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule Of Deferred Income Tax Assets And Liabilities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule Of Weighted-Average Assumptions Option Pricing Assumptions Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary Of Stock Option Activity Schedule of Nonvested Share Activity [Table Text Block] Schedule Of Non-Vested Stock Option Activity Schedule of Segment Reporting Information, by Segment [Text Block] Schedule Of Automotive And Other Segment Reporting Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Schedule Of Automotive Customers Individually Accounted For 10% Or More Of Net Sales Summary Of Significant Accounting And Reporting Policies [Table] Summary Of Significant Accounting And Reporting Policies [Table] Property, Plant and Equipment by Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Land And Building [Member] Land and Building [Member] Building And Building Improvements [Member] Buildings And Improvements [Member] Machinery And Equipment [Member] Machinery And Equipment [Member] Summary Of Significant Accounting And Reporting Policies [Line Items] Summary Of Significant Accounting And Reporting Policies [Line Items] Equity Method Investment, Other than Temporary Impairment Other-than-temporary equity investment losses Property, Plant and Equipment, Useful Life, Minimum Minimum estimated useful life, in years Property, Plant and Equipment, Useful Life, Maximum Maximum estimated useful life, in years Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Finite-Lived Intangible Assets, Weighted-Average Useful Life Finite-Lived Intangible Assets, Weighted-Average Useful Life, Total Weighted average amortization life, in years Amortization expense Amortization of Intangible Assets, Total Future Amortization Expense, Year One Future amortization expense, year 1 Future Amortization Expense, Year Two Future amortization expense, year 2 Future Amortization Expense, Year Three Future amortization expense, year 3 Future Amortization Expense, Year Four Future amortization expense, year 4 Future Amortization Expense, Year Five Future amortization expense, year 5 Marketing and Advertising Expense Marketing and Advertising Expense, Total Advertising and promotional costs Cost of Property Repairs and Maintenance Repair and maintenance of plant and equipment Depreciation Depreciation expense Depreciation, Total Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Shares related to stock plans not included in diluted average common shares outstanding because their effect would be antidilutive Allowance For Obsolete And Slow Moving Inventories Allowance For Obsolete And Slow Moving Inventories Allowance for obsolete and slow moving inventories Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances And Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance For Doubtful Accounts [Member] Allowance For Doubtful Accounts [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation Allowances and Reserves, Balance Ending Balance Beginning Balance Ending Balance Valuation Allowances and Reserves, Charged to Cost and Expense Valuation Allowances and Reserves, Charged to Cost and Expense, Total Net Additions/(Reductions) to Costs and Expenses Valuation Allowances and Reserves, Adjustments Valuation Allowances and Reserves, Adjustments, Total Deductions and Other Adjustments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Assets Measured on Recurring Basis, Disclosure Items [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Assets Measured on Recurring Basis, Disclosure Items [Domain] Fair Value Inputs Level1 [Member] Fair Value, Assets, Level 1 [Member] Fair Value Inputs Level2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Inputs Level3 [Member] Fair Value, Inputs, Level 3 [Member] Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis] Major Types Of Trading Securities And Assets [Domain] Major Types of Trading Securities and Assets [Domain] Securities Assets [Member] Securities (Assets) [Member] Debt Securities [Member] Debt Securities [Member] U S Treasury And Government [Member] US Treasury and Government [Member] U S Government Agencies Debt Securities [Member] Government Securities [Member] U S Treasury Securities [Member] U.S. Treasury Notes [Member] Other Debt Securities [Member] Other [Member] Equity Securities [Member] Equity Securities [Member] Mutual Funds [Member] Mutual Funds [Member] Mutual Funds - Equity [Member] Limited Partnership [Member] Limited Partnership [Member] Limited Partnership - Equity [Member] Other Equity [Member] Other Equity [Member] Other - Equity [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and Cash Equivalents, Fair Value Disclosure Cash & Cash Equivalents Investments, Fair Value Disclosure Unrealized Market Value Investments Aggregate Fair Value Available-for-sale Securities Total Available-for-sale Securities, Total Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Amortized Cost Basis Unrealized Cost Available-for-sale Securities, Amortized Cost Basis, Total Available-for-sale Securities, Gross Unrealized Gains Unrealized Gains Available-for-sale Securities, Gross Unrealized Gains, Total Available-for-sale Securities, Gross Unrealized Losses Unrealized Losses Unrealized Losses Available-for-sale Securities, Gross Unrealized Losses, Total Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses Aggregate Unrealized Losses, Less than one year Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Aggregate Unrealized Losses, Greater than one year Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Aggregate Fair Value, Less than one year Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Aggregate Fair Value, Greater than one year Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Due within one year Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Due between one and five years Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Available for sale securities debt maturities after five years amortized cost. Available For Sale Securities Debt Maturities After Five Years Amortized Cost Due over five years Available-for-sale Securities, Debt Maturities, Amortized Cost Fixed income securities, contractual maturities Available-for-sale Securities, Debt Maturities, Amortized Cost Inventory, Raw Materials Raw materials Inventory, Raw Materials, Total Inventory, Work in Process Work-in-process Inventory, Finished Goods Finished goods Inventory, Finished Goods, Total Weighted Average Number of Shares Outstanding, Basic Denominator for basic EPS, weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Basic, Total Incremental Common Shares Attributable to Conversion of Preferred Stock Potentially dilutive shares resulting from stock option plans Weighted Average Number Diluted Shares Outstanding Adjustment, Total Weighted Average Number of Shares Outstanding, Diluted Denominator for diluted EPS Denominator for diluted EPS Line of Credit Facility, Maximum Borrowing Capacity Available unsecured line of credit Debt Instrument, Basis Spread on Variable Rate Interest rate above the LIBOR rate Unrecognized Tax Benefits, Interest on Income Taxes Accrued Unrecognized tax benefits accrued interest Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax benefits associated with the exercise, vesting or disposition of stock under stock plans recognized as an adjustment of additional paid-in capital Income Taxes Paid Income taxes paid in cash Unrecognized Tax Benefits End of year Beginning of year Beginning of year Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Additions for tax positions in prior years Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions Reductions for tax positions in prior years Unrecognized tax benefits decreases resulting from completed audit examinations. Unrecognized Tax Benefits Decreases Resulting From Completed Audit Examinations Reductions as a result of completed audit examinations Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations Reductions as a result of a lapse of the applicable statute of limitations Current Federal Tax Expense (Benefit) Currently payable, Federal Current State and Local Tax Expense (Benefit) Currently payable, State Current Foreign Tax Expense (Benefit) Currently payable, Foreign Current Income Tax Expense (Benefit) Currently payable, Total Deferred Federal Income Tax Expense (Benefit) Net deferred, Primarily federal Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Statutory federal income tax rate Effective Income Tax Rate Reconciliation, State and Local Income Taxes State income taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, Deductions, Qualified Production Activities Domestic production exclusion Effective Income Tax Rate Reconciliation, Tax Exempt Income Tax-exempt investment income Effective Income Tax Rate Reconciliation, Other Adjustments Other Effective Income Tax Rate, Continuing Operations Effective income tax rate Deferred Tax Assets And Liabilities [Table] Deferred Tax Assets And Liabilities [Table] Deferred Tax Assets And Liabilities [Axis] Deferred Tax Assets And Liabilities [Axis] Deferred Tax Assets And Liabilities [Domain] Deferred Tax Assets And Liabilities [Domain] Deferred Tax Assets And Liabilities [Domain] Current [Member] Current [Member] Current [Member] Non Current [Member] Non Current [Member] Non-Current [Member] Deferred Tax Assets And Liabilities [Line Items] Deferred Tax Assets And Liabilities [Line Items] Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Total Accruals not currently deductible Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock based compensation Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses Impairment loss on available-for-sale securities Deferred Tax Assets, Other Other assets Deferred Tax Assets, Net Total deferred income tax assets Deferred tax liabilities deferred expense excess tax over book depreciation. Deferred Tax Liabilities Deferred Expense Excess Tax Over Book Depreciation Excess tax over book depreciation Excess tax over book depreciation Deferred Tax Liabilities, Deferred Expense, Capitalized Patent Costs Patent costs Patent costs Deferred Tax Liabilities, Unrealized Gains on Trading Securities Unrealized gain on investments Unrealized gain on investments Deferred Tax Liabilities, Other Other liabilities Other Deferred Tax Assets (Liabilities), Net Net deferred income taxes Defined Benefit Plan, Contributions by Employer Company's contributions under 401(k) retirement savings plan Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Employee Stock Ownership Plan (ESOP) Disclosures, by Plan [Axis] Employee Stock Ownership Plan E S O P Plan [Domain] Employee Stock Ownership Plan (ESOP), Plan [Domain] Employee Stock Option Plan [Member] Employee Stock Option Plan [Member] Employee Stock Option Plan [Member] Non-Employee Director Stock Option Plan [Member] Non Employee Director Stock Option Plan [Member] Non-Employee Director Stock Option Plan [Member] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Restricted Stock Plan [Member] Restricted Stock Plan [Member] Restricted Stock Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Options available for grant Share based compensation arrangement by share based payment award options grants. Share Based Compensation Arrangement By Share Based Payment Award Options Grants Options granted net of shares from canceled/expired options Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Option vesting period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Wtd. Avg. Remaining Contract Life, Outstanding at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term, Beginning of Period Option expiration period, years Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date Option expiration period, years Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Weighted-average period for unrecognized compensation cost expected to be recognized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares approved Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares sold to employees during period Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date ESPP discount rate Share based compensation arrangement by share based payment award weighted average fair value of shares sold. Share Based Compensation Arrangement By Share Based Payment Award Weighted Average Fair Value Of Shares Sold Weighted average fair value of shares sold Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares, Nonvested stock options at End of Year Shares, Nonvested stock options at Beginning of Year Shares outstanding Stock Issued During Period, Shares, Restricted Stock Award, Gross Shares granted with restriction period Restricted shares outstanding Share-based compensation, restricted period. Share-Based Compensation, Restricted Period Restricted period, maximum, in years Share based compensation restricted period for granted shares. Share Based Compensation Restricted Period For Granted Shares Restricted period for granted shares, in years Share based compensation arrangement by share based payment award market price of restricted stock. Share Based Compensation Arrangement By Share Based Payment Award Market Price of Restricted Stock Market price Deferred Compensation Equity Deferred Compensation Equity, Ending Balance Deferred Compensation Equity, Beginning Balance Unearned stock-based compensation Deferred Compensation Equity, Total Other Deferred Cost, Amortization Expense Amortization expense Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term of options (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Wtd. Avg Grant Date Fair Value, Nonvested stock options at Beginning of Year Weighted-average grant-date fair value Wtd. Avg Grant Date Fair Value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Shares, Outstanding at End of Year Shares, Outstanding at Beginning of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total Shares, Granted Stock Issued During Period, Shares, Stock Options Exercised Shares, Exercised Shares, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Shares, Forfeited Shares, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Shares, Exercisable at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Wtd. Avg. Ex. Price, Outstanding at End of Year Wtd. Avg. Ex. Price, Outstanding at Beginning of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Wtd. Avg. Ex. Price, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Wtd. Avg. Ex. Price, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Wtd. Avg. Ex. Price, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Wtd. Avg. Ex. Price, Exercisable at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Wtd. Avg. Remaining Contract Life, Exercisable at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Aggregate Intrinsic Value, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Outstanding at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate Intrinsic Value, Exercisable at End of Year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares granted with restriction period Shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Shares, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Shares, Forfeited Shares, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Wtd. Avg Grant Date Fair Value, Nonvested stock options at End of Year Wtd. Avg Grant Date Fair Value, Nonvested stock options at Beginning of Year Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Wtd. Avg Grant Date Fair Value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Wtd. Avg Grant Date Fair Value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Wtd. Avg Grant Date Fair Value, Forfeited Schedule of Segment Reporting Information, by Segment [Table] Statement, Geographical [Axis] Segment Geographical [Domain] Segment, Geographical [Domain] United States [Member] United States [Member] United States [Member] Germany [Member] Germany [Member] Germany [Member] Japan [Member] Japan [Member] Japan [Member] Other Countries [Member] Other Countries [Member] Other Countries [Member] Segment Reporting Information, by Segment [Axis] Segment [Domain] Reporting Segment [Domain] Automotive Products Segment [Member] Automotive Products Segment [Member] Automotive Products [Member] Other Segment [Member] Other Segment [Member] Other [Member] Corporate [Member] Corporate [Member] Corporate [Member] Segment Reporting Information [Line Items] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk by Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer [Member] Major Customers [Axis] Name Of Major Customer [Domain] Name of Major Customer [Domain] Toyota Motor Corporation [Member] Toyota Motor Corporation [Member] Toyota Motor Corporation [Member] Hyundai/Kia [Member] Hyundai Kia [Member] Hyundai/Kia [Member] General Motors [Member] General Motors [Member] General Motors [Member] VW/Audi [Member] Vw Audi [Member] VW/Audi [Member] Daimler AG [Member] Daimler Ag [Member] Daimler AG [Member] BMW [Member] Bmw [Member] BMW [Member] Ford [Member] Ford [Member] Ford [Member] Revenue, Major Customer [Line Items] Entity-Wide Revenue, Major Customer, Percent Entity-Wide Revenue, Major Customer, Percentage Percentage of revenue individually accounted by customers Percentage net sales invoiced and paid in foreign currencies. Percentage Net Sales Invoiced And Paid In Foreign Currencies Percentage net sales invoiced and paid in foreign currencies Number of customers which individually accounted for 10% or more of net sales. Number Of Customers Which Individually Accounted For 10 Percent Or More Of Net Sales Number of customers which individually accounted for 10% or more of net sales Percentage Of Net Sales By Automotive Customers Percentage Of Net Sales By Automotive Customers Percentage of net sales five automotive customers individually accounted for Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Corporate Bond Securities [Member] Corporate Bond [Member] Certificates Of Deposit [Member] Certificate Of Deposit [Member]