Unrealized gains on available-for-sale debt securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Patents and other assets, net Patent and Other Assets, Net Letter of Credit Letter of Credit [Member] Work-in-process Inventory, Work in Process, Gross HomeLink® Trade Names and Trademarks Trademarks and Trade Names [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] NET INCOME Net income Net income Net Income (Loss) Attributable to Parent Range [Domain] Statistical Measurement [Domain] Finite-lived intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Other Intangible Assets Other Intangible Assets [Member] Dividends declared ($0.12 per share) Dividends, Common Stock, Cash Restricted period, maximum Share Based Compensation, Restricted Period Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Proceeds from sale of plant and equipment Proceeds from Sale of Property, Plant, and Equipment Revenue from Contract with Customer [Abstract] ESPP discount rate Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Additional paid-in capital Additional Paid in Capital, Common Stock Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Total other assets Other Assets, Noncurrent Other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Segments [Axis] Segments [Axis] Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate In Process Research and Development In Process Research and Development [Member] NET INCREASE IN CASH AND CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity File Number Entity File Number Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Stock-based compensation expense related to stock options, employee stock purchases and restricted stock APIC, Share-based Payment Arrangement, Increase for Cost Recognition Lease Liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Certificate of Deposit Certificates of Deposit [Member] Reclassifications Out of Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Other Segment OtherSegmentMember Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization of intangible assets Amortization of Intangible Assets Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Sale of Stock [Axis] Sale of Stock [Axis] Finite-Lived Intangible Patents and Assets, Accumulated Amortization Finite-Lived Intangible Patents and Assets, Accumulated Amortization Finite-Lived Intangible Patents and Assets, Accumulated Amortization Business Combination and Asset Acquisition [Abstract] Business Acquisition [Axis] Business Acquisition [Axis] Municipal Bonds Municipal Bonds [Member] Maturities and calls Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Aerospace Products AerospaceProductsMember Automotive Products AutomotiveProductsMember Award Type [Domain] Award Type [Domain] Local Phone Number Local Phone Number Due over five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Years, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Years, Fair Value ASSETS Assets [Abstract] Other Products OtherProductsMember Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Retained  Earnings Retained Earnings [Member] Prepaid expenses and other Increase (Decrease) in Prepaid Expense and Other Assets Contingencies Commitments and Contingencies Disclosure [Text Block] OTHER (LOSS) INCOME Investment Income, Nonoperating [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Germany GERMANY Investment income Investment Income, Nonoperating Commitments and Contingencies Disclosure [Abstract] Long-Term Investments Other Long-term Investments [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Basic (in dollars per share) Net income per share - Basic (in dollars per share) Earnings Per Share, Basic Realized (loss) gain on sale of securities Equity Securities, FV-NI, Realized Gain (Loss) Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Revenue Revenue from Contract with Customer [Text Block] Guardian Optical Technologies Guardian Optical Technologies [Member] Guardian Optical Technologies Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Employee Stock Option Plan Employee Stock Option Plan [Member] Raw materials Inventory, Raw Materials, Gross Diluted Earnings Per Share Earnings Per Share, Diluted [Abstract] Loss on sale of investments Loss on Sale of Investments Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Purchase price of acquisition Business Combination, Consideration Transferred Goodwill [Roll Forward] Goodwill [Roll Forward] HomeLink Modules HomeLinkModulesMember Plan Name [Axis] Plan Name [Axis] Long-term debt Long-term Debt Total Assets, Fair Value Disclosure Level 1 Fair Value, Inputs, Level 1 [Member] Impairments Goodwill, Impairment Loss Equity investment losses were considered to be other than temporary Other than Temporary Impairment Losses, Investments Income Tax Disclosure [Abstract] Entity Small Business Entity Small Business Activity in available-for-sale securities: Proceeds from Sale and Maturity of Debt Securities, Available-for-sale [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Total liabilities and shareholders’ investment Liabilities and Equity Investments, Debt and Equity Securities [Abstract] Aggregate Fair Value of Investments, Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] LIABILITIES AND SHAREHOLDERS’ INVESTMENT Liabilities and Equity [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Adjustments to reconcile net income to net cash provided by operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Earnings Per Share Earnings Per Share [Text Block] OPERATING EXPENSES: Operating Expenses [Abstract] Entity Interactive Data Current Entity Interactive Data Current Amortization expense, year four Finite-Lived Intangible Asset, Expected Amortization, Year Four Minimum Minimum [Member] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Gross profit Gross Profit 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Selling, general & administrative Selling, General and Administrative Expense Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Entity Address, State or Province Entity Address, State or Province Omnibus Incentive Plan Omnibus Incentive Plan [Member] Omnibus Incentive Plan Aggregate Fair Value of Investments, Loss duration greater than one year Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Ownership percentage of business acquisition Business Acquisition, Percentage of Voting Interests Acquired CURRENT LIABILITIES Liabilities, Current [Abstract] Issuance of common stock from stock plan transactions Stock Issued During Period, Value, New Issues Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Debt and Financing Arrangements Debt Disclosure [Text Block] Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Credit Agreement Line of Credit [Member] Conversion rate, options Share-based Compensation Arrangement by Share-based Payment Award, Options, Conversion Rate Share-based Compensation Arrangement by Share-based Payment Award, Options, Conversion Rate Stock-Based Compensation Plans Share-based Payment Arrangement [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Cash dividends paid Payments of Ordinary Dividends, Common Stock Inventories Inventory Disclosure [Text Block] Option expiration period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Issuance of common stock from stock plan transactions (in shares) Stock Issued During Period, Shares, New Issues Total Operating Lease, Liability Document Transition Report Document Transition Report Common stock Common Stock, Value, Issued Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total other (loss) income Nonoperating Income (Expense) Acquisitions Goodwill, Acquired During Period Performance Shares Performance Shares [Member] Leases Lessee, Operating Leases [Text Block] Accumulated other comprehensive (loss) income Accumulated other comprehensive (loss) income, end of period Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company 2022 (excluding the three months ended March 31, 2022) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Acquisition Business Combination Disclosure [Text Block] Restricted Stock Restricted Stock [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Vaporsens Inc Vaporsens Inc [Member] Vaporsens Inc Weighted-Average Assumptions For The Employee Stock Option Plan Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Cover [Abstract] Other Comprehensive loss before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Schedule of Unrealized Loss on Investments Schedule of Unrealized Loss on Investments [Table Text Block] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Automotive Products AutomotiveProductsSegmentMember Plant and equipment additions Payments to Acquire Productive Assets Prepaid expenses and other Prepaid Expense and Other Assets, Current Financial Instrument [Axis] Financial Instrument [Axis] Cash Dividends Declared per Share (in dollars per share) Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Accrued liabilities Accrued Liabilities, Current NET SALES Revenue Revenue from Contract with Customer, Excluding Assessed Tax Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Swing Loans Swing Loans [Member] Change in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Equity [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Document Quarterly Report Document Quarterly Report Common Stock Common Stock [Member] Segment Reporting Segment Reporting Disclosure [Text Block] Income from operations Income (loss) from operations Operating Income (Loss) Accrued Liabilities Operating Lease, Liability, Current Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Due between one and five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Argil, Inc. Argil, Inc. [Member] Argil, Inc. Amortization expense, year two Finite-Lived Intangible Asset, Expected Amortization, Year Two Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Existing Customer Platforms Customer Contracts [Member] Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock Share-based Payment Arrangement, Noncash Expense AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Additional  Paid-In Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Vaporsens Technology Licenses Technology-Based Intangible Assets [Member] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Accrued liabilities, excluding dividends declared and short-term debt Increase (Decrease) in Accrued Liabilities Purchases Payments to Acquire Debt Securities, Available-for-sale Operating lease, liability, current, statement of financial position Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other (loss) income, net Other Nonoperating Income (Expense) Shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Total liabilities Liabilities Japan JAPAN Award Type [Axis] Award Type [Axis] Amortization expense, year one Finite-Lived Intangible Asset, Expected Amortization, Year One Future Minimum Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total shareholders’ investment Balance at beginning of period Balance at end of period Stockholders' Equity Attributable to Parent City Area Code City Area Code Goodwill and Intangible Assets Disclosure [Abstract] Entity Address, City or Town Entity Address, City or Town Repurchases of common stock Payments for Repurchase of Common Stock SHAREHOLDERS’ INVESTMENT Stockholders' Equity Attributable to Parent [Abstract] Schedule of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Number of plans SharebasedCompensationArrangementbySharebasedPaymentAwardNumberOfPlans Other Non-Current Liabilities Operating Lease, Liability, Noncurrent HomeLink® HomeLinkMember Principal amount Debt Instrument, Face Amount OTHER ASSETS Assets, Noncurrent [Abstract] Exclusive Licensing Agreement Licensing Agreements [Member] Loss on disposal of assets Loss on Disposition of Assets Loss on Disposition of Assets Net decrease in period (in shares) Net Increase (Decrease) in Common Stock Shares from Shares Issued in Share Based Compensation and Shares Repurchased Automotive Segment AutomotiveSegmentMember Retained earnings Retained Earnings (Accumulated Deficit) Equity Incentive Plans Share-based Payment Arrangement [Member] Statement of Stockholders' Equity [Abstract] Entity Filer Category Entity Filer Category Business Acquisition [Line Items] Business Acquisition [Line Items] Remaining lease terms Lessee, Operating Lease, Remaining Lease Term Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Government Securities US Treasury Securities [Member] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Inventory Disclosure [Abstract] Indefinite-lived intangible assets Indefinite-lived Intangible Assets (Excluding Goodwill) Short-term investments Short-term Investments Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] PROVISION FOR INCOME TAXES Provision for income taxes Income Tax Expense (Benefit) Other Goodwill, Other Increase (Decrease) Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Tax Identification Number Entity Tax Identification Number Investment Type [Axis] Investment Type [Axis] Other comprehensive income (loss) before tax: Other Comprehensive Income (Loss), before Tax [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Sale of Stock [Domain] Sale of Stock [Domain] Mexico MEXICO Inventories Total Inventory Inventory, Net Schedule of Automotive and Other Segment Reporting Schedule of Segment Reporting Information, by Segment [Table Text Block] Repurchases of common stock Stock Repurchased During Period, Value Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Statement of Financial Position [Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Fair Value of Investments, Loss duration less than one year Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value CASH FLOWS (USED FOR) FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Technology investments Equity Securities without Readily Determinable Fair Value, Amount Weighted average grant-date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Common stock issued under stock compensation plan (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Repurchases of common stock (in shares) Stock repurchased (in shares) Stock Repurchased During Period, Shares Shares issued under the Omnibus plan Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Investments [Abstract] Statement [Line Items] Statement [Line Items] Total Debt Securities, Available-for-sale Short-Term Investments Short-term Investments [Member] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Debt Disclosure [Abstract] Non-Qualified Stock Options Non-Qualified Stock Option [Member] Non-Qualified Stock Option Schedule of Shares Issued, Net of Shares from Canceled/Expired Options and Shares Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] INCOME BEFORE PROVISION FOR INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Schedule of Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Less: Dividends and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Segment Reporting [Abstract] Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of Earnings Per Share Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Divestitures Goodwill, Written off Related to Sale of Business Unit Title of 12(b) Security Title of 12(b) Security Issuance of common stock from stock plan transactions Proceeds from Issuance of Common Stock Income tax impact related to components of other comprehensive income (loss) Other Comprehensive Income (Loss), Tax Total assets Assets Restricted Stock Plan Restricted Stock Plan [Member] Plan Name [Domain] Plan Name [Domain] Geographical [Domain] Geographical [Domain] Net Income available to common shareholders - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Type Document Type Product and Service [Domain] Product and Service [Domain] Engineering, research and development Research and Development Expense Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving Facility Revolving Credit Facility [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Other Other Segments [Member] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Corporate Bonds Corporate Bond Securities [Member] Basic Earnings Per Share Earnings Per Share, Basic [Abstract] Geographical [Axis] Geographical [Axis] Basic weighted average shares outstanding Number of shares used in basic computation Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Net Income per share - Diluted (in dollars per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Additional weighted average dilutive common stock equivalents (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Net Income available to common shareholders Allocation of Net Income used in basic computation Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Intangible assets, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Reallocation of undistributed earnings Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted Net cash (used for) financing activities Net Cash Provided by (Used in) Financing Activities Option vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Conversion rate, shares Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instrument, Conversion Rate Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instrument, Conversion Rate Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Investments Fair Value Disclosures [Text Block] Accounts payable Accounts Payable, Current Depreciation and amortization Depreciation, Depletion and Amortization Amortization expense, year three Finite-Lived Intangible Asset, Expected Amortization, Year Three Investment Securities Stated at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Accumulated  Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Amortization expense, remainder of fiscal year Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Inventories Increase (Decrease) in Inventories Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Schedule of Amortized Cost, Unrealized Gains and Losses, And Market Value of Investment Securities Unrealized Gain (Loss) on Investments [Table Text Block] Long-term investments Long-term Investments Financial Instruments [Domain] Financial Instruments [Domain] Cost Debt Securities, Available-for-sale, Amortized Cost, Current COST OF GOODS SOLD Cost of Goods and Services Sold Document Period End Date Document Period End Date Entity Central Index Key Entity Central Index Key Automotive Mirrors & Electronics AutomotiveMirrorsElectronicsMember Amortization expense Restricted Stock or Unit Expense Air-CraftGlass Air-CraftGlass [Member] Air-CraftGlass Fixed Income Securities Fixed Income Securities [Member] CASH FLOWS USED FOR INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Market Value Investments, Fair Value Disclosure PLANT AND EQUIPMENT—NET Property, Plant and Equipment, Net Total operating expenses Operating Expenses Total grants in period (in shares) Total grants in period (in shares) Share-based Compensation Arrangement by Share-based Award, Granted in Period Share-based Compensation Arrangement by Share-based Award, Granted in Period Intangible patents and assets, gross Intangible Patents and Assets, Gross (Excluding Goodwill) Intangible Patents and Assets, Gross (Excluding Goodwill) OTHER NON-CURRENT LIABILITIES Other Liabilities, Noncurrent Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol Patents and Other Intangible Assets Patents and Other Intangible Assets [Member] EARNINGS PER SHARE: Earnings Per Share [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Aggregate Unrealized Losses, Total Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Increase in other assets Increase (Decrease) in Other Operating Assets Amounts reclassified from accumulated other comprehensive income Total net reclassifications for the period Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Finished goods Inventory, Finished Goods, Gross Sales proceeds Proceeds from Sale of Debt Securities, Available-for-sale Operating lease, liability, noncurrent, statement of financial position Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Other OtherCountriesMember Gentex Patents Patents [Member] Compensation expense for share-based payments Share-based Payment Arrangement, Expense Additional borrowings available Debt Instrument Additional Borrowings Available Face Amount Entity Current Reporting Status Entity Current Reporting Status Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Fire Protection Products FireProtectionProductsMember Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Other Other Debt Obligations [Member] Investments [Domain] Investments [Domain] CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Dividends declared Dividends U.S. UNITED STATES (Gain) on sale of investments Gain on Sale of Investments Statement of Comprehensive Income [Abstract] CURRENT ASSETS Assets, Current [Abstract] Finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Leases [Abstract] Accumulated other comprehensive income (loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Unrealized (losses) gains on debt securities, net OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Cash & Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Entity Address, Postal Zip Code Entity Address, Postal Zip Code Diluted weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Other comprehensive loss Net current-period change Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Equity Stockholders' Equity Note Disclosure [Text Block] Statement of Cash Flows [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Entity Shell Company Entity Shell Company Expected term of options (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Employee Stock Employee Stock [Member] (Gain) on disposal of assets Gain on Disposal of Assets Gain on Disposal of Assets Reclassification Out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Amounts Reclassified from Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Current Fiscal Year End Date Current Fiscal Year End Date Statement [Table] Statement [Table] Asset Backed Securities Asset-backed Securities [Member] ESPP discount rate recognized as compensation expense Share-Based Compensation Arrangement By Share Based Payment Award, Discount Recognized As Compensation Expense Unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Range [Axis] Statistical Measurement [Axis] Intangible patents and assets, net Intangible Patents and Assets, Net (Excluding Goodwill) Intangible Patents and Assets, Net (Excluding Goodwill) Finite-lived intangible assets, net Finite-Lived Intangible Assets, Net Goodwill Balance as of December 31, 2021 Balance as of March 31, 2022 Goodwill Aggregate Unrealized Losses, Loss duration less than one year Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Schedule of Goodwill Schedule of Goodwill [Table Text Block] Due within one year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One HomeLink® Technology Developed Technology Rights [Member] Aggregate Unrealized Losses, Loss duration greater than one year Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Change in deferred income taxes Deferred Income Tax Expense (Benefit)