Gentex (GNTX) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 23, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	0-10235
Entity Registrant Name	GENTEX CORPORATION
Entity Central Index Key	0000355811
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-2030505
Entity Address, Address Line One	600 N. Centennial
Entity Address, City or Town	Zeeland
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49464
City Area Code	616
Local Phone Number	772-1800
Title of 12(b) Security	Common Stock, par value $0.06 per share
Trading Symbol	GNTX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		245,056,522

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Dec. 31, 2019	[1]
CURRENT ASSETS
Cash and cash equivalents	$ 400,499,542	$ 296,321,622
Short-term investments	52,578,480	140,384,053
Accounts receivable, net	268,457,875	235,410,326
Inventories	233,358,102	248,941,855
Prepaid expenses and other	20,424,567	29,319,036
Total current assets	975,318,566	950,376,892
PLANT AND EQUIPMENT—NET	474,019,432	498,316,100
OTHER ASSETS
Goodwill	311,216,556	307,365,845
Long-term investments	159,011,362	139,909,323
Intangible assets, net	247,911,399	250,375,000
Patents and other assets, net	24,997,791	22,460,033
Total other assets	743,137,108	720,110,201
Total assets	2,192,475,106	2,168,803,193
CURRENT LIABILITIES
Accounts payable	90,246,791	97,553,917
Current portion of long-term debt	25,000,000	0
Accrued liabilities	121,242,379	74,292,883
Total current liabilities	236,489,170	171,846,800
OTHER NON-CURRENT LIABILITIES	15,071,701	7,414,424
DEFERRED INCOME TAXES	45,301,936	51,454,149
Total liabilities	296,862,807	230,715,373
SHAREHOLDERS’ INVESTMENT
Common stock	14,703,703	15,076,651
Additional paid-in capital	830,408,683	807,928,139
Retained earnings	1,046,052,853	1,116,372,133
Accumulated other comprehensive income (loss)	4,447,060	(1,289,103)
Total shareholders’ investment	1,895,612,299	1,938,087,820
Total liabilities and shareholders’ investment	$ 2,192,475,106	$ 2,168,803,193
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Income - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
NET SALES		$ 474,638,584	$ 477,761,417	$ 1,158,325,866	$ 1,415,061,768
COST OF GOODS SOLD		286,401,872	297,440,131	769,556,865	888,558,373
Gross profit		188,236,712	180,321,286	388,769,001	526,503,395
OPERATING EXPENSES:
Engineering, research and development		27,812,730	29,398,725	86,421,121	85,847,249
Selling, general & administrative		21,571,093	22,786,881	65,206,080	63,019,167
Total operating expenses		49,383,823	52,185,606	151,627,201	148,866,416
Income from operations		138,852,889	128,135,680	237,141,800	377,636,979
OTHER INCOME
Investment income		1,825,257	3,353,510	5,733,939	8,756,638
Other income, net		2,218,852	90,323	3,423,881	376,983
Total other income		4,044,109	3,443,833	9,157,820	9,133,621
INCOME BEFORE PROVISION FOR INCOME TAXES		142,896,998	131,579,513	246,299,620	386,770,600
PROVISION FOR INCOME TAXES		25,804,396	19,681,661	42,075,250	61,633,712
NET INCOME		$ 117,092,602	$ 111,897,852	$ 204,224,370	$ 325,136,888
EARNINGS PER SHARE:
Basic (in dollars per share)	[1]	$ 0.48	$ 0.44	$ 0.83	$ 1.27
Diluted (in dollars per share)	[1]	0.48	0.44	0.82	1.26
Cash Dividends Declared per Share (in dollars per share)		$ 0.120	$ 0.115	$ 0.360	$ 0.345
[1]	(1) Earnings Per Share has been adjusted to exclude the portion of net income allocated to participating securities as a result of share-based payment awards.

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 117,092,602	$ 111,897,852	$ 204,224,370	$ 325,136,888
Other comprehensive income before tax:
Foreign currency translation adjustments	1,823,667	(1,623,102)	1,268,204	(1,799,789)
Unrealized (losses) gains on debt securities, net	(146,647)	457,438	5,655,644	3,338,762
Other comprehensive income (loss), before tax	1,677,020	(1,165,664)	6,923,848	1,538,973
Income tax impact related to components of other comprehensive income	(30,796)	96,062	1,187,685	701,140
Other comprehensive income (loss), net of tax	1,707,816	(1,261,726)	5,736,163	837,833
Comprehensive Income	$ 118,800,418	$ 110,636,126	$ 209,960,533	$ 325,974,721

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Shareholders' Investment - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 1,822,607,413	$ 1,904,334,235	$ 1,938,087,820	[1]	$ 1,861,751,660
Issuance of common stock from stock plan transactions	7,966,489	26,287,061	$ 23,677,181		68,221,875
Issuance of common stock related to acquisitions (in shares)			100,000
Issuance of common stock related to acquisitions			$ 3,559,229
Repurchases of common stock (in shares)			(8,200,000)
Repurchases of common stock	(31,660,862)	(96,625,003)	$ (210,480,446)		(262,763,375)
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock	7,306,543	5,788,286	19,093,196		15,927,434
Dividends declared	(29,407,702)	(29,092,442)	(88,285,214)		(87,784,052)
Net income	117,092,602	111,897,852	204,224,370		325,136,888
Other comprehensive income (loss)	1,707,816	(1,261,726)	5,736,163		837,833
Balance at end of period	$ 1,895,612,299	$ 1,921,328,263	$ 1,895,612,299		$ 1,921,328,263
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	245,775,488	254,779,119	251,277,515		259,328,613
Balance at beginning of period	$ 14,746,529	$ 15,286,747	$ 15,076,651		$ 15,559,717
Issuance of common stock from stock plan transactions (in shares)	461,983	1,771,463	1,815,270		5,021,616
Issuance of common stock from stock plan transactions	$ 27,719	$ 106,287	$ 108,917		$ 301,297
Issuance of common stock related to acquisitions (in shares)			163,718
Issuance of common stock related to acquisitions			$ 9,823
Repurchases of common stock (in shares)	(1,175,756)	(3,569,577)	(8,194,788)		(11,369,224)
Repurchases of common stock	$ (70,545)	$ (214,174)	$ (491,688)		$ (682,154)
Ending balance (in shares)	245,061,715	252,981,005	245,061,715		252,981,005
Balance at end of period	$ 14,703,703	$ 15,178,860	$ 14,703,703		$ 15,178,860
Additional  Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	818,678,880	777,238,253	807,928,139		745,324,144
Issuance of common stock from stock plan transactions	7,938,770	26,180,774	23,568,264		67,920,578
Issuance of common stock related to acquisitions			3,549,406
Repurchases of common stock	(3,515,510)	(9,744,945)	(23,730,322)		(29,709,788)
Stock-based compensation expense related to stock options, employee stock purchases and restricted stock	7,306,543	5,788,286	19,093,196		15,927,434
Balance at end of period	830,408,683	799,462,368	830,408,683		799,462,368
Retained  Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	986,442,760	1,111,310,014	1,116,372,133		1,102,468,137
Repurchases of common stock	(28,074,807)	(86,665,884)	(186,258,436)		(232,371,433)
Dividends declared	(29,407,702)	(29,092,442)	(88,285,214)		(87,784,052)
Net income	117,092,602	111,897,852	204,224,370		325,136,888
Balance at end of period	1,046,052,853	1,107,449,540	1,046,052,853		1,107,449,540
Accumulated  Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	2,739,244	499,221	(1,289,103)		(1,600,338)
Other comprehensive income (loss)	1,707,816	(1,261,726)	5,736,163		837,833
Balance at end of period	$ 4,447,060	$ (762,505)	$ 4,447,060		$ (762,505)
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Shareholders' Investment (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 0.120	$ 0.115	$ 0.360	$ 0.345

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 204,224,370	$ 325,136,888
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	78,489,026	79,331,513
(Gain) on disposal of assets	(281,542)	(148,376)
Loss on disposal of assets	146,195	495,697
(Gain) on sale of investments	(1,504,757)	(593,351)
Loss on sale of investments	143,370	0
Change in deferred income taxes	(9,559,993)	2,189,818
Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock	23,266,906	15,927,434
Change in operating assets and liabilities:
Accounts receivable, net	(32,832,997)	(39,570,916)
Inventories	15,659,539	(13,395,196)
Prepaid expenses and other	8,934,297	(2,729,945)
Accounts payable	(7,389,582)	2,499,481
Accrued liabilities, excluding dividends declared and short-term debt	49,749,418	14,797,251
Net cash provided by operating activities	329,044,250	383,940,298
Activity in available-for-sale securities:
Sales proceeds	15,559,590	57,087,935
Maturities and calls	117,172,368	9,714,000
Purchases	(59,933,780)	(66,360,636)
Plant and equipment additions	(37,048,073)	(58,322,472)
Proceeds from sale of plant and equipment	331,465	1,937,207
Acquisition of businesses, net of cash acquired	(8,043,217)	0
Increase in other assets	(3,326,783)	(3,111,644)
Net cash (used for) investing activities	24,711,570	(59,055,610)
CASH FLOWS (USED FOR) FINANCING ACTIVITIES:
Proceeds from borrowings on Credit Agreement	75,000,000	0
Repayment of borrowings on Credit Agreement	(50,000,000)	0
Issuance of common stock from stock plan transactions	23,677,181	68,221,875
Cash dividends paid	(87,774,635)	(87,217,383)
Repurchases of common stock	(210,480,446)	(262,763,375)
Net cash (used for) financing activities	(249,577,900)	(281,758,883)
NET INCREASE IN CASH AND CASH EQUIVALENTS	104,177,920	43,125,805
CASH AND CASH EQUIVALENTS, beginning of period	296,321,622	217,025,278
CASH AND CASH EQUIVALENTS, end of period	$ 400,499,542	$ 260,151,083

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of PresentationThe unaudited condensed consolidated financial statements included herein have been prepared by the Company, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. It is suggested that these unaudited condensed consolidated financial statements be read in conjunction with the financial statements and notes thereto included in the Company's 2019 annual report on Form 10-K. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting of only a normal and recurring nature, necessary to present fairly the financial position of the Company as of September 30, 2020, and the results of operations and cash flows for the interim periods presented.

Adoption of New Accounting Pron

Adoption of New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
Adoption of New Accounting Pronouncements	Adoption of New Accounting Pronouncements Effective January 1, 2020, the Company adopted Accounting Standards Update ("ASU") 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instrument s. This guidance must be adopted using a modified retrospective transition method through a cumulative-effect adjustment to retained earnings in the period of adoption. Based on the insignificant impact of this ASU on the Company's financial statements, a cumulative-effect adjustment to retained earnings was not deemed necessary. The standard requires a change in the measurement approach for credit losses on financial assets measured on an amortized cost basis from an incurred loss method to an expected loss method, thereby eliminating the requirement that a credit loss be considered probable to impact the valuation of a financial asset measured on an amortized cost basis. The standard requires the measurement of expected credit losses to be based on relevant information about past events, including historical experience, current conditions, and a reasonable and supportable forecast that affects the collectability of the related financial asset. It also modifies the impairment model for available-for-sale debt securities and provides a simplified accounting model for purchased financial assets with credit deterioration since their origination. The adoption of this standard did not have a material impact on the Company's consolidated balance sheet, consolidated income statement, or consolidated statement of cash flows.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the cost of an acquisition in excess of the fair values assigned to identifiable net assets acquired. The Company recorded Goodwill of $307.4 million as part of the HomeLink ® acquisition in 2013 and recorded an additional $3.9 million in Goodwill as part of the acquisition of Vaporsens that occurred in the second quarter of 2020. See Note 16 for more information on the Vaporsens transaction. The carrying value of Goodwill as of September 30, 2020 and December 31, 2019 was $311.2 million and $307.4 million, respectively. Carrying Amount Balance as of December 31, 2019 $ 307,365,845 Acquisitions 3,850,711 Divestitures — Impairments — Other — Balance as of September 30, 2020 $ 311,216,556 In addition to annual impairment testing, which is performed as of the first day of the fourth quarter, the Company continuously monitors for events and circumstances that could negatively impact the key assumptions in determining fair value of goodwill or other intangible assets thus resulting in the need for interim impairment testing, including long-term revenue growth projections, profitability, discount rates, recent market valuations from transactions by comparable companies, volatility in the Company's market capitalization, and general industry, market and macroeconomic conditions. The impact of COVID-19 was again considered in the most recently completed quarter, but did not indicate the need for interim impairment testing. The Company also acquired In-Process Research & Development as part of the acquisition of Vaporsens that occurred in the second quarter of 2020 and the acquisition of Air-Craftglass Production BV ("Air-Craftglass") in the third quarter of 2020. See Note 16 for more information on these transactions. The patents and intangible assets and related change in carrying values are set forth in the tables below: As of September 30, 2020: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,011,452 $ (23,982,357) $ 14,029,095 Various Vaporsens Technology Licenses 292,943 (35,002) 257,941 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (105,000,000) 75,000,000 12 years Existing Customer Platforms 43,000,000 (30,100,000) 12,900,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Air-Craftglass In-Process R&D 1,011,399 — 1,011,399 Indefinite Total Other Intangible Assets $ 383,011,399 $ (135,100,000) $ 247,911,399 Total Patents & Other Intangible Assets $ 421,315,794 $ (159,117,359) $ 262,198,435 As of December 31, 2019: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 37,328,963 $ (22,491,010) $ 14,837,953 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (93,750,000) 86,250,000 12 years Existing Customer Platforms 43,000,000 (26,875,000) 16,125,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Total Other Intangible Assets $ 371,000,000 $ (120,625,000) $ 250,375,000 Total Patents & Other Intangible Assets $ 408,328,963 $ (143,116,010) $ 265,212,953

Investments

Investments	9 Months Ended
	Sep. 30, 2020
Investments [Abstract]
Investments	Investments The Company follows the provisions of Accounting Standards Codification ("ASC") 820, Fair Value Measurements and Disclosures , for its financial assets and liabilities, and for its non-financial assets and liabilities subject to fair value measurements. ASC 820 provides a framework for measuring the fair value of assets and liabilities. This framework is intended to provide increased consistency in how fair value determinations are made under various existing accounting standards that permit, or in some cases, require estimates of fair-market value. This standard also expanded financial statement disclosure requirements with respect to a company’s use of fair-value measurements, including the effect of such measurements on earnings. The cost of securities sold is based on the specific identification method. The Company determines the fair value of its government securities, asset-backed securities, municipal bonds, and corporate bonds by utilizing monthly valuation statements that are provided by its broker. The broker determines the investment valuation by utilizing the bid price in the market and also refers to third party sources to validate valuations, and as such are classified as Level 2 assets. The Company's certificates of deposit are classified as available for sale and are considered as Level 1 assets. These investments are carried at cost, which approximates fair value. The Company also periodically makes technology investments in certain non-consolidated third-parties. These equity investments are accounted for in accordance with ASC 321, Investments - Equity Securities . Equity investments that do not have readily determinable fair values, and where the Company has not identified any observable events that would cause adjustment of the valuation to date, such equity investments are held at cost. These technology investments totaled approximately $8.6 million and $9.0 million as of September 30, 2020 and December 31, 2019, respectively. These investments are classified within Long-Term Investments in the consolidated balance sheet. Assets or liabilities that have recurring fair value measurements are shown below as of September 30, 2020 and December 31, 2019: As of September 30, 2020: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description September 30, 2020 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 400,499,542 $ 400,499,542 $ — $ — Short-Term Investments: Certificate of Deposit 1,270,465 1,270,465 — — Corporate Bonds 14,105,245 — 14,105,245 — Government Securities 23,235,183 — 23,235,183 — Municipal Bonds 11,025,844 — 11,025,844 — Other 2,941,743 2,941,743 — — Long-Term Investments: Asset Backed Securities 42,012,670 — 42,012,670 — Certificate of Deposit 3,913,968 3,913,968 — — Corporate Bonds 8,975,930 — 8,975,930 — Government Securities — — — — Municipal Bonds 95,487,532 — 95,487,532 — Total $ 603,468,122 $ 408,625,718 $ 194,842,404 $ — As of December 31, 2019: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description December 31, 2019 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 296,321,622 $ 296,321,622 $ — $ — Short-Term Investments: Certificate of Deposit 50,099,795 50,099,795 — — Corporate Bonds 29,219,685 — 29,219,685 — Government Securities 58,432,823 — 58,432,823 — Other 2,631,750 2,631,750 — — Long-Term Investments: Asset-backed Securities 25,791,029 — 25,791,029 — Certificate of Deposit 3,557,798 3,557,798 — Corporate Bonds 22,815,998 — 22,815,998 — Governmental Securities 6,088,190 — 6,088,190 — Municipal Bonds 72,638,690 — 72,638,690 — Total $ 567,597,380 $ 352,610,965 $ 214,986,415 $ — The amortized cost, unrealized gains and losses, and market value of investment securities are shown as of September 30, 2020 and December 31, 2019: As of September 30, 2020: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,252,187 $ 18,278 $ — $ 1,270,465 Corporate Bonds 13,970,360 134,885 — 14,105,245 Government Securities 23,105,527 129,656 — 23,235,183 Municipal Bonds 10,864,899 160,945 — 11,025,844 Other 2,941,743 — — 2,941,743 Long-Term Investments: Asset Backed Securities 41,521,603 1,086,633 (595,566) 42,012,670 Certificate of Deposit 3,754,312 159,656 — 3,913,968 Corporate Bonds 8,598,910 377,020 — 8,975,930 Municipal Bonds 89,916,703 5,580,670 (9,841) 95,487,532 Total $ 195,926,244 $ 7,647,743 $ (605,407) $ 202,968,580 As of December 31, 2019: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 50,099,795 $ — $ — $ 50,099,795 Corporate Bonds 29,025,624 194,061 — 29,219,685 Government Securities 58,343,911 99,917 (11,005) 58,432,823 Other 2,631,750 — — 2,631,750 Long-Term Investments: Asset-backed Securities 25,971,156 — (180,127) 25,791,029 Certificate of Deposit 3,500,000 58,808 (1,010) 3,557,798 Corporate Bonds 22,306,130 509,868 — 22,815,998 Government Securities 6,012,705 75,485 — 6,088,190 Municipal Bonds 71,997,996 1,036,116 (395,422) 72,638,690 Total $ 269,889,067 $ 1,974,255 $ (587,564) $ 271,275,758 Unrealized losses on investments as of September 30, 2020, are as follows: Aggregate Unrealized Losses Aggregate Fair Value Loss duration of less than one year $ 605,407 $ 24,572,356 Loss duration of greater than one year — — Total $ 605,407 $ 24,572,356 Unrealized losses on investments as of December 31, 2019, are as follows: Aggregate Unrealized Losses Aggregate Fair Value Loss duration of less than one year $ 587,564 $ 90,721,081 Loss duration of greater than one year — — Total $ 587,564 $ 90,721,081 As stated in Note 1 , effective January 1, 2020, the Company adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instrument s. The guidance modifies the impairment model for available-for-sale debt securities and provides a simplified accounting model for purchased financial assets with credit deterioration since their origination. The Company utilized the guidance provided by ASC 326 to determine whether any of the available-for-sale debt securities held by the Company were impaired. No investments were considered to be impaired during the periods presented. The Company has the intention and current ability to hold its debt investments until the amortized cost basis has been recovered. Fixed income securities as of September 30, 2020 have contractual maturities as follows: Due within one year $ 49,192,972 Due between one and five years 30,466,413 Due over five years 113,325,115 $ 192,984,500

Inventories

Inventories	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following at the respective balance sheet dates: September 30, 2020 December 31, 2019 Raw materials $ 160,155,658 $ 164,974,553 Work-in-process 30,308,212 33,069,255 Finished goods 42,894,232 50,898,047 Total Inventory $ 233,358,102 $ 248,941,855

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The Company has unvested share-based payment awards with a right to receive non-forfeitable dividends, which are considered participating securities under ASC 260, Earnings Per Share . The Company allocates earnings to participating securities and computes earnings per share using the two-class method. Under the two-class method, net income per share is computed by dividing net income allocated to common shareholders by the weighted average number of common shares outstanding for the period. In applying the two-class method, net income is allocated to both common shares and participating securities based on their respective weighted average shares outstanding for the period. For a period of net loss, net loss is not allocated to participating securities. The following table sets forth the computation of basic and diluted net income per common share under the two-class method for the three and nine months ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Basic Earnings Per Share Net (Loss) Income $ 117,092,602 $ 111,897,852 $ 204,224,370 $ 325,136,888 Less: Dividends and undistributed earnings allocated to participating securities 1,697,281 1,389,659 2,906,048 3,699,548 Net (Loss) Income available to common shareholders $ 115,395,321 $ 110,508,193 $ 201,318,322 $ 321,437,340 Basic weighted average shares outstanding 241,898,117 251,075,859 243,240,699 252,811,950 Net (Loss) Income per share - Basic $ 0.48 $ 0.44 $ 0.83 $ 1.27 Diluted Earnings Per Share Allocation of Net (Loss) Income used in basic computation $ 115,395,321 $ 110,508,193 $ 201,318,322 $ 321,437,340 Reallocation of undistributed earnings 4,742 6,051 6,731 15,389 Net (Loss) Income available to common shareholders - Diluted $ 115,400,063 $ 110,514,244 $ 201,325,053 $ 321,452,729 Number of shares used in basic computation 241,898,117 251,075,859 243,240,699 252,811,950 Additional weighted average dilutive common stock equivalents 918,950 1,503,123 1,026,916 1,455,901 Diluted weighted average shares outstanding 242,817,067 252,578,982 244,267,615 254,267,851 Net (Loss) Income per share - Diluted $ 0.48 $ 0.44 $ 0.82 $ 1.26 Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive 412,775 3,054 412,775 170,386

Stock-Based Compensation Plans

Stock-Based Compensation Plans	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans As of September 30, 2020, the Company had two equity incentive plans, which include the Gentex Corporation 2019 Omnibus Incentive Plan ("2019 Omnibus Plan"), and an employee stock purchase plan. Those plans and any prior material amendments thereto have previously been approved by shareholders. The 2019 Omnibus Plan provides for the potential awards to: i) employees; and ii) non-employee directors of the Company or its subsidiaries, which potential awards may be stock options (both incentive stock options and non-qualified stock options), appreciation rights, restricted stock, restricted stock units, performance share awards and performance units, and other awards that are stock-based, cash-based or a combination of both. The 2019 Omnibus Plan replaced the Company's Employee Stock Option Plan, Second Restricted Stock Plan, and Amended and Restated Non-Employee Director Stock Option Plan (the "Prior Plans"), which were also approved by shareholders. Any existing awards previously granted under the Prior Plans remain outstanding in accordance with their terms and are governed by the Prior Plans as applicable. Readers should refer to Note 5 of the consolidated financial statements in the Company's Annual Report on Form 10-K for the calendar year ended December 31, 2019, for additional information related to the Prior Plans. The Company recognized total compensation expense for share-based payments of $6,904,725 for the three months ended September 30, 2020, and total compensation expense for share-based payments of $22,865,087 for nine months ended September 30, 2020, which included approximately $4,173,710 in severance expense that was recognized during the second quarter 2020. The Company recognized compensation expense for share-based payments of $5,712,132 and $15,927,434 for the three and nine months ended September 30, 2019, respectively. A portion of the compensation cost for share based payment awards is capitalized as part of inventory. 2019 Omnibus Incentive Plan The 2019 Omnibus Incentive Plan covers 45,000,000 shares of common stock. The purpose of the 2019 Omnibus Incentive Plan is to attract and retain employees, officers, and directors of the Company and its subsidiaries and to motivate and provide such persons incentives and rewards for performance. As of September 30, 2020, 9,191,249 shares (net of shares from canceled/expired options) have been issued under the 2019 Omnibus Plan, which includes stock options (at a set conversion rate), restricted shares, and performance share awards. Employee Stock Options Under the 2019 Omnibus Plan and the Employee Stock Option Plan, the option exercise price equals the stock’s market price on the date of grant. The options vest after one five The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Dividend Yield (1) 1.98 % 1.99 % 1.99 % 2.02 % Expected volatility (2) 27.72 % 24.25 % 27.38 % 23.84 % Risk-free interest rate (3) 0.28 % 1.55 % 0.31 % 1.85 % Expected term of options (years) (4) 4.16 4.16 4.16 4.18 Weighted-avg. grant date fair value $4.64 $4.76 $4.38 $4.23 1. Represents the Company’s estimated cash dividend yield over the expected term of option grant. 2. Amount is determined based on analysis of historical price volatility of the Company’s common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant. 3. Represents the U.S. Treasury yield over the expected term of the option grant. 4. Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that all employee groups exhibit similar exercise and post-vesting termination behavior. Restricted Shares Restricted shares awarded under the 2019 Omnibus Plan and the Second Restricted Stock Plan entitle the shareholder to all rights of common stock ownership except that the shares may not be sold, transferred, pledged, exchanged or otherwise disposed of during the restriction period. The restriction period is determined by the Compensation Committee, appointed by the Board of Directors, but may not exceed ten years under the terms of such plans. As of September 30, 2020, the Company had unearned stock-based compensation of $40,755,008 associated with the restricted stock grants issued under the 2019 Omnibus Plan and the prior plan. The unearned stock-based compensation related to these grants is being amortized to compensation expense over the applicable restriction periods. Amortization expense from restricted stock grants in the three months ended September 30, 2020 was $4,366,025 and amortization expense from restricted stock grants in the nine months ended September 30, 2020 was $16,271,774, which included $4,148,477 of severance related expense that occurred in the second quarter of 2020. Amortization expense from restricted stock grants for the three and nine months ended September 30, 2019 was $3,843,962 and $9,890,137, respectively. Performance Shares Performance shares awarded under the 2019 Omnibus Plan are considered performance condition awards as attainment is based on the Company's performance relative to pre-established metrics. The fair value of such performance share awards was determined using the Company's closing stock price on the date of grant. The expected attainment of the metrics for these awards is then analyzed each reporting period, and the related expense is adjusted based on expected attainment, if the then expected attainment differs from previous expectations. The cumulative effect on current and prior periods of a change in expected attainment is recognized in the period of change. As of September 30, 2020, the Company had unearned stock-based compensation of $5,133,550 associated with these performance share grants. The unearned stock-based compensation related to these grants is being amortized to compensation expense over the applicable performance periods. Amortization expense from performance share grants in the three and nine months ended September 30, 2020 was $1,403,799 and $2,361,359, respectively. Amortization expense from performance share grants in the three and nine months ended September 30, 2019 was $263,392 and $633,576, respectively. Employee Stock Purchase Plan The Company has an employee stock purchase plan covering 2,000,000 shares of common stock. Under the plan, the Company sells shares at 85% of the stock’s market price at date of purchase. Under ASC 718, Compensation - Stock Compensation , the 15% discounted value is recognized as compensation expense. As of September 30, 2020, the Company has issued 1,321,981 shares under this plan.

Comprehensive Income

Comprehensive Income	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Comprehensive Income	Comprehensive Income Comprehensive income reflects the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. For the Company, comprehensive income represents net income adjusted for unrealized gains and losses on certain debt investments, foreign currency translation adjustments, and derivatives. The following table presents the net changes in the Company's accumulated other comprehensive income by component (all amounts shown are net of tax): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Foreign currency translation adjustments: Balance at beginning of period $ (2,940,052) $ (1,851,574) $ (2,384,589) $ (1,674,887) Other Comprehensive income (loss) before reclassifications 1,823,667 (1,623,102) 1,268,204 (1,799,789) Net current-period change 1,823,667 (1,623,102) 1,268,204 (1,799,789) Balance at end of period (1,116,385) (3,474,676) (1,116,385) (3,474,676) Unrealized gains on available-for-sale debt securities: Balance at beginning of period 5,679,296 2,350,795 1,095,486 74,549 Other Comprehensive income before reclassifications 208,503 657,128 5,543,455 3,106,369 Amounts reclassified from accumulated other comprehensive income (324,354) (295,752) (1,075,496) (468,747) Net current-period change (115,851) 361,376 4,467,959 2,637,622 Balance at end of period 5,563,445 2,712,171 5,563,445 2,712,171 Accumulated other comprehensive income (loss), end of period $ 4,447,060 $ (762,505) $ 4,447,060 $ (762,505) The following table presents details of reclassifications out of accumulated other comprehensive income for the three and nine months ended September 30, 2020 and 2019. Details about Accumulated Other Comprehensive Income Components Amounts Reclassified from Other Comprehensive Income Affected Line item in the Statement of Consolidated Income Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Unrealized gains on available-for-sale debt securities Realized gain on sale $ 410,575 $ 374,370 $ 1,361,387 $ 593,351 Investment income Provision for income taxes (86,221) (78,618) (285,891) (124,604) Provision for income taxes Total net reclassifications for the period $ 324,354 $ 295,752 $ 1,075,496 $ 468,747 Net of tax

Debt and Financing Arrangements

Debt and Financing Arrangements	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Debt and Financing Arrangements	Debt and Financing Arrangements On October 15, 2018, the Company entered into a Credit Agreement (“Credit Agreement”) with PNC as the administrative agent and sole lender. Pursuant to this Credit Agreement, the Company has access to a $150 million senior revolving credit facility (“Revolver”). Under the terms of the Credit Agreement, the Company is entitled to further request an additional aggregate principal amount of up to $100 million, subject to the satisfaction of certain conditions. In addition, the Company is entitled to the benefit of swing loans from amounts otherwise available under the Revolver in the aggregate principal amount of up to $20 million and to request Letters of Credit from amounts otherwise available under the Revolver in the aggregate principle amount up to $20 million, both subject to certain conditions. The obligations of the Company under the Credit Agreement are not secured, but are subject to certain covenants. During the three months ended September 30, 2020, the Company made principal repayments of $50 million, plus accrued interest, on the Revolver. The Company used cash and cash equivalents to fund the payments. As of September 30, 2020, there was an outstanding balance of $25 million on the Revolver. The Company has the ability and intent to repay the full outstanding balance using cash, and anticipates paying the remaining balance during the fourth quarter of 2020; therefore, this balance has been classified as a current liability. The Revolver expires on October 15, 2023. As of September 30, 2020, the borrowing rate on its Revolver is derived from the one month LIBOR, and based on the Company's leverage ratio as of September 30, 2020, the interest rate on its borrowings is equal to 1.03%. During the three and nine months ended September 30, 2020, interest expense was $0.2 million and $0.6 million, respectively, which was recorded with the "Other income (loss), net" section of the Unaudited Consolidated Statements of Income . Based on the loan balance as of September 30, 2020, a one percent increase in the Company's borrowing rate would increase net interest expense paid by the Company on its borrowings by approximately $0.1 million on an annual basis. The Credit Agreement contains customary representations and warranties and certain covenants that place certain limitations on the Company. As of September 30, 2020, the Company is in compliance with its covenants under the Credit Agreement.

Equity

Equity	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Equity	Equity The decrease in common stock during the nine months ended September 30, 2020, was primarily due to the repurchases of 8.2 million shares, partially offset by the issuance of 1.9 million shares of the Company’s common stock under the Company’s stock-based compensation plans and the issuance of 0.1 million shares of the Company's common stock as part of the acquisition of Vaporsens (see Note 16 for more information). The total net decrease was 6.2 million shares. The Company announced a $0.005 (1/2 cent) per share increase in its quarterly cash dividend rate during the first quarter of 2020. As such, the Company recorded a cash dividend of $0.120 per share during the third quarter of 2020 as compared to a cash dividend of $0.115 per share during the third quarter of 2019. The third quarter 2020 dividend of $29.4 million was declared on August 31, 2020, and was paid on October 21, 2020.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	ContingenciesThe Company is periodically involved in legal proceedings, legal actions and claims arising in the normal course of business, including proceedings relating to product liability, intellectual property, safety and health, employment, regulatory, and other matters. Such matters are subject to many uncertainties and outcomes are not predictable. The Company does not believe, however, that at the current time any of these matters constitute material pending legal proceedings that will have a material adverse effect on the financial position or future results of operations or cash flows of the Company.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company's automotive segment develops and manufactures digital vision and connected car products and electronics, including: automatic-dimming rearview mirrors with and without electronic features; non-auto dimming rearview mirrors with and without electronic features; and other electronics. The Company also develops and manufactures variably dimming windows for the aerospace industry and fire protection products for the commercial construction industry, which are combined into the "Other" segment. During the second quarter of 2020, the Company also acquired Vaporsens, which specializes in nanofiber chemical sensing research and development, which was also combined in the "Other" segment, as shown below. Further information in regards to the Vaporsens transaction is included in Note 16 of the financial statements. Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Revenue: Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other 9,964,997 13,480,710 31,728,846 38,357,355 Total $ 474,638,584 $ 477,761,417 $ 1,158,325,866 $ 1,415,061,768 Income from operations: Automotive Products $ 138,428,628 $ 123,342,538 $ 233,149,936 $ 364,590,462 Other 424,261 4,793,142 3,991,864 13,046,517 Total $ 138,852,889 $ 128,135,680 $ 237,141,800 $ 377,636,979

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe effective tax rate was 17.1% in the nine months ended September 30, 2020 compared to 15.9% for the same period in 2019. Generally, effective tax rates for these periods differ from statutory federal income tax rates, due to provisions for state and local income taxes, permanent tax differences, and the foreign-derived intangible income tax deduction and research and development tax credits.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The following table shows the Company’s Automotive revenue and Other Products revenue disaggregated by geographical location for Automotive Products for the three and nine month periods ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2019 2020 2019 Automotive Products U.S. $ 156,521,110 $ 145,798,028 $ 347,952,489 $ 431,729,037 Germany 56,514,969 74,047,596 153,166,702 225,649,215 Japan 64,353,263 60,641,977 152,824,143 172,697,963 Mexico 33,342,171 43,884,609 92,882,253 130,473,702 Other 153,942,074 139,908,497 379,771,433 416,154,496 Total Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other Products (U.S.) 9,964,997 13,480,710 31,728,846 38,357,355 Total Revenue $ 474,638,584 $ 477,761,417 $ 1,158,325,866 $ 1,415,061,768 Revenue by geographic area may fluctuate based on many factors, including: exposure to local economic, political and labor conditions; a pandemic; unexpected changes in laws, regulations, trade or monetary or fiscal policy, including interest rates, foreign currency exchange rates and changes in the rate of inflation in the U.S. and other foreign countries; and tariffs, quotas, customs and other import or export restrictions and other trade barriers. The following table disaggregates the Company’s Automotive revenue and Other revenue by major source for the three and nine month periods ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2019 2020 2019 Automotive Segment Automotive Mirrors & Electronics $ 427,426,159 $ 418,746,334 $ 1,039,112,012 $ 1,241,147,268 HomeLink Modules* 37,247,428 45,534,373 87,485,008 135,557,145 Total Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other Segment Fire Protection Products 6,378,303 5,977,245 17,384,594 18,188,744 Windows Products 3,586,694 7,503,465 14,344,252 20,168,611 Total Other $ 9,964,997 $ 13,480,710 $ 31,728,846 $ 38,357,355 *Excludes HomeLink revenue where HomeLink electronics are integrated into interior auto-dimming mirrors.

Leases

Leases	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	Leases The Company has operating leases for corporate offices, warehouses, vehicles, and other equipment, which are included within "Plant and Equipment - Net" section of the Condensed Consolidated Balance Sheets. The leases have remaining lease terms of 1 year to 5 years. The weighted average remaining lease term for operating leases as of September 30, 2020 was 2 years, with a weighted average discount rate of 1.2%. Future minimum lease payments for operating leases as of September 30, 2020 were as follows: Year ending December 31, 2020 (excluding the nine months ended September 30, 2020) $ 394,431 2021 1,345,977 2022 825,645 2023 268,705 2024 32,956 Thereafter 5,951 Total future minimum lease payments 2,873,665 Less imputed interest (24,182) Total $ 2,849,483 Reported as of September 30, 2020 Accrued Liabilities $ 1,419,060 Other Non-Current Liabilities 1,430,423 Total $ 2,849,483

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions	Acquisitions On April 3, 2020, the Company acquired Vaporsens, Inc (“Vaporsens”) for $10.6 million in a stock purchase deal, which was in addition to the previous $3.0 million equity investment by the Company in Vaporsens. The Company funded the acquisition with $7.1 million in cash payments, with the remaining $3.5 million of consideration paid with common stock of the Company. Vaporsens specializes in nanofiber chemical sensing research and development, which the Company anticipates using to complement and expand its product offerings. Vaporsens is now a 100% owned subsidiary of the Company, and has been classified within the “Other” segment. The assets acquired and liabilities assumed were recorded at fair value on the acquisition date. The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . There were no revenues of the business of Vaporsens which were included in the Company’s consolidated statement of income and comprehensive income for the quarter or year to date periods ended September 30, 2020. The following table summarizes the fair values of the assets acquired, and the liabilities assumed, as of the acquisition date of April 3, 2020. The valuation process is not complete and the final determination of the fair values may result in further adjustments to the values presented below: Fair Value Current Assets $ 435,722 Personal Property 562,840 Technology Licenses 245,335 In-Process R&D 11,000,000 Goodwill 3,850,711 Total assets acquired 16,094,608 Current liabilities 255,522 Deferred Tax Liability 2,220,086 Total Liabilities assumed 2,475,608 Net Assets Acquired $ 13,619,000 The allocation of the purchase price above is considered preliminary and was based upon valuation information available and estimates and assumptions made as of September 30, 2020. The Company is still in the process of verifying data and finalizing information related to the valuation and recording of identifiable intangible assets, deferred taxes, net working capital, and the resulting effects on the amount of recorded goodwill. The Company expects to finalize these matters within the measurement period, which is currently expected to remain open through the end of calendar year 2020. On September 18, 2020, the Company acquired Air-Craftglass, a Belgian company specializing in research and development for aircraft windows, for an initial payment of $1.1 million in a stock purchase deal. The Company funded the acquisition with a cash payment from cash on hand. The transaction also included contingent consideration based on future revenues. The Company is still in the process of verifying data and finalizing information related to the valuation and recording of identifiable intangible assets, deferred taxes, net working capital, contingent consideration liability, and the resulting effects on the amount of recorded goodwill. The Company expects to finalize these matters within the measurement period, which is currently expected to remain open through the second quarter of 2021. Air-Craftglass is now a 100% owned subsidiary of the Company, and will be classified within the “Other” segment. The assets acquired and liabilities assumed were recorded at fair value on the acquisition date. The Company accounted for the acquisition under the provisions of FASB ASC Topic 805, Business Combinations . There were no revenues of the business of Air-Craftglass which were included in the the Company’s consolidated statement of income and comprehensive income for the quarter or year to date periods ended September 30, 2020. Through September 30, 2020, the Company has incurred acquisition-related costs of approximately $600,000, which has been expensed as incurred in the "Selling, general & administrative" section of its Condensed Consolidated Income Statement.

Adoption of New Accounting Pr_2

Adoption of New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
Adoption of New Accounting Pronouncements	Effective January 1, 2020, the Company adopted Accounting Standards Update ("ASU") 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instrument s. This guidance must be adopted using a modified retrospective transition method through a cumulative-effect adjustment to retained earnings in the period of adoption. Based on the insignificant impact of this ASU on the Company's financial statements, a cumulative-effect adjustment to retained earnings was not deemed necessary. The standard requires a change in the measurement approach for credit losses on financial assets measured on an amortized cost basis from an incurred loss method to an expected loss method, thereby eliminating the requirement that a credit loss be considered probable to impact the valuation of a financial asset measured on an amortized cost basis. The standard requires the measurement of expected credit losses to be based on relevant information about past events, including historical experience, current conditions, and a reasonable and supportable forecast that affects the collectability of the related financial asset. It also modifies the impairment model for available-for-sale debt securities and provides a simplified accounting model for purchased financial assets with credit deterioration since their origination. The adoption of this standard did not have a material impact on the Company's consolidated balance sheet, consolidated income statement, or consolidated statement of cash flows.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The carrying value of Goodwill as of September 30, 2020 and December 31, 2019 was $311.2 million and $307.4 million, respectively. Carrying Amount Balance as of December 31, 2019 $ 307,365,845 Acquisitions 3,850,711 Divestitures — Impairments — Other — Balance as of September 30, 2020 $ 311,216,556
Schedule of Intangible Assets	The patents and intangible assets and related change in carrying values are set forth in the tables below: As of September 30, 2020: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 38,011,452 $ (23,982,357) $ 14,029,095 Various Vaporsens Technology Licenses 292,943 (35,002) 257,941 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (105,000,000) 75,000,000 12 years Existing Customer Platforms 43,000,000 (30,100,000) 12,900,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Vaporsens In-Process R&D 11,000,000 — 11,000,000 Indefinite Air-Craftglass In-Process R&D 1,011,399 — 1,011,399 Indefinite Total Other Intangible Assets $ 383,011,399 $ (135,100,000) $ 247,911,399 Total Patents & Other Intangible Assets $ 421,315,794 $ (159,117,359) $ 262,198,435 As of December 31, 2019: Other Intangible Assets Gross Accumulated Amortization Net Assumed Useful Life Gentex Patents $ 37,328,963 $ (22,491,010) $ 14,837,953 Various Other Intangible Assets HomeLink ® Trade Names and Trademarks $ 52,000,000 $ — $ 52,000,000 Indefinite HomeLink ® Technology 180,000,000 (93,750,000) 86,250,000 12 years Existing Customer Platforms 43,000,000 (26,875,000) 16,125,000 10 years Exclusive Licensing Agreement 96,000,000 — 96,000,000 Indefinite Total Other Intangible Assets $ 371,000,000 $ (120,625,000) $ 250,375,000 Total Patents & Other Intangible Assets $ 408,328,963 $ (143,116,010) $ 265,212,953

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2020
Investments [Abstract]
Investment Securities Stated at Fair Value	Assets or liabilities that have recurring fair value measurements are shown below as of September 30, 2020 and December 31, 2019: As of September 30, 2020: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description September 30, 2020 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 400,499,542 $ 400,499,542 $ — $ — Short-Term Investments: Certificate of Deposit 1,270,465 1,270,465 — — Corporate Bonds 14,105,245 — 14,105,245 — Government Securities 23,235,183 — 23,235,183 — Municipal Bonds 11,025,844 — 11,025,844 — Other 2,941,743 2,941,743 — — Long-Term Investments: Asset Backed Securities 42,012,670 — 42,012,670 — Certificate of Deposit 3,913,968 3,913,968 — — Corporate Bonds 8,975,930 — 8,975,930 — Government Securities — — — — Municipal Bonds 95,487,532 — 95,487,532 — Total $ 603,468,122 $ 408,625,718 $ 194,842,404 $ — As of December 31, 2019: Fair Value Measurements at Reporting Date Using Total as of Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description December 31, 2019 (Level 1) (Level 2) (Level 3) Cash & Cash Equivalents $ 296,321,622 $ 296,321,622 $ — $ — Short-Term Investments: Certificate of Deposit 50,099,795 50,099,795 — — Corporate Bonds 29,219,685 — 29,219,685 — Government Securities 58,432,823 — 58,432,823 — Other 2,631,750 2,631,750 — — Long-Term Investments: Asset-backed Securities 25,791,029 — 25,791,029 — Certificate of Deposit 3,557,798 3,557,798 — Corporate Bonds 22,815,998 — 22,815,998 — Governmental Securities 6,088,190 — 6,088,190 — Municipal Bonds 72,638,690 — 72,638,690 — Total $ 567,597,380 $ 352,610,965 $ 214,986,415 $ —
Schedule of Amortized Cost, Unrealized Gains And Losses, And Market Value of Investment Securities	The amortized cost, unrealized gains and losses, and market value of investment securities are shown as of September 30, 2020 and December 31, 2019: As of September 30, 2020: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 1,252,187 $ 18,278 $ — $ 1,270,465 Corporate Bonds 13,970,360 134,885 — 14,105,245 Government Securities 23,105,527 129,656 — 23,235,183 Municipal Bonds 10,864,899 160,945 — 11,025,844 Other 2,941,743 — — 2,941,743 Long-Term Investments: Asset Backed Securities 41,521,603 1,086,633 (595,566) 42,012,670 Certificate of Deposit 3,754,312 159,656 — 3,913,968 Corporate Bonds 8,598,910 377,020 — 8,975,930 Municipal Bonds 89,916,703 5,580,670 (9,841) 95,487,532 Total $ 195,926,244 $ 7,647,743 $ (605,407) $ 202,968,580 As of December 31, 2019: Unrealized Cost Gains Losses Market Value Short-Term Investments: Certificate of Deposit $ 50,099,795 $ — $ — $ 50,099,795 Corporate Bonds 29,025,624 194,061 — 29,219,685 Government Securities 58,343,911 99,917 (11,005) 58,432,823 Other 2,631,750 — — 2,631,750 Long-Term Investments: Asset-backed Securities 25,971,156 — (180,127) 25,791,029 Certificate of Deposit 3,500,000 58,808 (1,010) 3,557,798 Corporate Bonds 22,306,130 509,868 — 22,815,998 Government Securities 6,012,705 75,485 — 6,088,190 Municipal Bonds 71,997,996 1,036,116 (395,422) 72,638,690 Total $ 269,889,067 $ 1,974,255 $ (587,564) $ 271,275,758
Schedule of Unrealized Loss on Investments	Unrealized losses on investments as of September 30, 2020, are as follows: Aggregate Unrealized Losses Aggregate Fair Value Loss duration of less than one year $ 605,407 $ 24,572,356 Loss duration of greater than one year — — Total $ 605,407 $ 24,572,356 Unrealized losses on investments as of December 31, 2019, are as follows: Aggregate Unrealized Losses Aggregate Fair Value Loss duration of less than one year $ 587,564 $ 90,721,081 Loss duration of greater than one year — — Total $ 587,564 $ 90,721,081
Investments Classified by Contractual Maturity Date	Fixed income securities as of September 30, 2020 have contractual maturities as follows: Due within one year $ 49,192,972 Due between one and five years 30,466,413 Due over five years 113,325,115 $ 192,984,500

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following at the respective balance sheet dates: September 30, 2020 December 31, 2019 Raw materials $ 160,155,658 $ 164,974,553 Work-in-process 30,308,212 33,069,255 Finished goods 42,894,232 50,898,047 Total Inventory $ 233,358,102 $ 248,941,855

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share Basic And Diluted	The following table sets forth the computation of basic and diluted net income per common share under the two-class method for the three and nine months ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Basic Earnings Per Share Net (Loss) Income $ 117,092,602 $ 111,897,852 $ 204,224,370 $ 325,136,888 Less: Dividends and undistributed earnings allocated to participating securities 1,697,281 1,389,659 2,906,048 3,699,548 Net (Loss) Income available to common shareholders $ 115,395,321 $ 110,508,193 $ 201,318,322 $ 321,437,340 Basic weighted average shares outstanding 241,898,117 251,075,859 243,240,699 252,811,950 Net (Loss) Income per share - Basic $ 0.48 $ 0.44 $ 0.83 $ 1.27 Diluted Earnings Per Share Allocation of Net (Loss) Income used in basic computation $ 115,395,321 $ 110,508,193 $ 201,318,322 $ 321,437,340 Reallocation of undistributed earnings 4,742 6,051 6,731 15,389 Net (Loss) Income available to common shareholders - Diluted $ 115,400,063 $ 110,514,244 $ 201,325,053 $ 321,452,729 Number of shares used in basic computation 241,898,117 251,075,859 243,240,699 252,811,950 Additional weighted average dilutive common stock equivalents 918,950 1,503,123 1,026,916 1,455,901 Diluted weighted average shares outstanding 242,817,067 252,578,982 244,267,615 254,267,851 Net (Loss) Income per share - Diluted $ 0.48 $ 0.44 $ 0.82 $ 1.26 Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive 412,775 3,054 412,775 170,386

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Weighted-Average Assumptions For The Employee Stock Option Plan	The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Dividend Yield (1) 1.98 % 1.99 % 1.99 % 2.02 % Expected volatility (2) 27.72 % 24.25 % 27.38 % 23.84 % Risk-free interest rate (3) 0.28 % 1.55 % 0.31 % 1.85 % Expected term of options (years) (4) 4.16 4.16 4.16 4.18 Weighted-avg. grant date fair value $4.64 $4.76 $4.38 $4.23 1. Represents the Company’s estimated cash dividend yield over the expected term of option grant. 2. Amount is determined based on analysis of historical price volatility of the Company’s common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant. 3. Represents the U.S. Treasury yield over the expected term of the option grant. 4. Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that all employee groups exhibit similar exercise and post-vesting termination behavior.

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of AOCI	The following table presents the net changes in the Company's accumulated other comprehensive income by component (all amounts shown are net of tax): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Foreign currency translation adjustments: Balance at beginning of period $ (2,940,052) $ (1,851,574) $ (2,384,589) $ (1,674,887) Other Comprehensive income (loss) before reclassifications 1,823,667 (1,623,102) 1,268,204 (1,799,789) Net current-period change 1,823,667 (1,623,102) 1,268,204 (1,799,789) Balance at end of period (1,116,385) (3,474,676) (1,116,385) (3,474,676) Unrealized gains on available-for-sale debt securities: Balance at beginning of period 5,679,296 2,350,795 1,095,486 74,549 Other Comprehensive income before reclassifications 208,503 657,128 5,543,455 3,106,369 Amounts reclassified from accumulated other comprehensive income (324,354) (295,752) (1,075,496) (468,747) Net current-period change (115,851) 361,376 4,467,959 2,637,622 Balance at end of period 5,563,445 2,712,171 5,563,445 2,712,171 Accumulated other comprehensive income (loss), end of period $ 4,447,060 $ (762,505) $ 4,447,060 $ (762,505)
Reclassifications Out of Other Comprehensive Income	The following table presents details of reclassifications out of accumulated other comprehensive income for the three and nine months ended September 30, 2020 and 2019. Details about Accumulated Other Comprehensive Income Components Amounts Reclassified from Other Comprehensive Income Affected Line item in the Statement of Consolidated Income Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Unrealized gains on available-for-sale debt securities Realized gain on sale $ 410,575 $ 374,370 $ 1,361,387 $ 593,351 Investment income Provision for income taxes (86,221) (78,618) (285,891) (124,604) Provision for income taxes Total net reclassifications for the period $ 324,354 $ 295,752 $ 1,075,496 $ 468,747 Net of tax

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Automotive and Other Segment Reporting	During the second quarter of 2020, the Company also acquired Vaporsens, which specializes in nanofiber chemical sensing research and development, which was also combined in the "Other" segment, as shown below. Further information in regards to the Vaporsens transaction is included in Note 16 of the financial statements. Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Revenue: Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other 9,964,997 13,480,710 31,728,846 38,357,355 Total $ 474,638,584 $ 477,761,417 $ 1,158,325,866 $ 1,415,061,768 Income from operations: Automotive Products $ 138,428,628 $ 123,342,538 $ 233,149,936 $ 364,590,462 Other 424,261 4,793,142 3,991,864 13,046,517 Total $ 138,852,889 $ 128,135,680 $ 237,141,800 $ 377,636,979

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table shows the Company’s Automotive revenue and Other Products revenue disaggregated by geographical location for Automotive Products for the three and nine month periods ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2019 2020 2019 Automotive Products U.S. $ 156,521,110 $ 145,798,028 $ 347,952,489 $ 431,729,037 Germany 56,514,969 74,047,596 153,166,702 225,649,215 Japan 64,353,263 60,641,977 152,824,143 172,697,963 Mexico 33,342,171 43,884,609 92,882,253 130,473,702 Other 153,942,074 139,908,497 379,771,433 416,154,496 Total Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other Products (U.S.) 9,964,997 13,480,710 31,728,846 38,357,355 Total Revenue $ 474,638,584 $ 477,761,417 $ 1,158,325,866 $ 1,415,061,768 Revenue by geographic area may fluctuate based on many factors, including: exposure to local economic, political and labor conditions; a pandemic; unexpected changes in laws, regulations, trade or monetary or fiscal policy, including interest rates, foreign currency exchange rates and changes in the rate of inflation in the U.S. and other foreign countries; and tariffs, quotas, customs and other import or export restrictions and other trade barriers. The following table disaggregates the Company’s Automotive revenue and Other revenue by major source for the three and nine month periods ended September 30, 2020 and September 30, 2019: Three Months Ended September 30, Nine Months Ended September 30, Revenue 2020 2019 2020 2019 Automotive Segment Automotive Mirrors & Electronics $ 427,426,159 $ 418,746,334 $ 1,039,112,012 $ 1,241,147,268 HomeLink Modules* 37,247,428 45,534,373 87,485,008 135,557,145 Total Automotive Products $ 464,673,587 $ 464,280,707 $ 1,126,597,020 $ 1,376,704,413 Other Segment Fire Protection Products 6,378,303 5,977,245 17,384,594 18,188,744 Windows Products 3,586,694 7,503,465 14,344,252 20,168,611 Total Other $ 9,964,997 $ 13,480,710 $ 31,728,846 $ 38,357,355 *Excludes HomeLink revenue where HomeLink electronics are integrated into interior auto-dimming mirrors.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Future Minimum Lease Payments	Future minimum lease payments for operating leases as of September 30, 2020 were as follows: Year ending December 31, 2020 (excluding the nine months ended September 30, 2020) $ 394,431 2021 1,345,977 2022 825,645 2023 268,705 2024 32,956 Thereafter 5,951 Total future minimum lease payments 2,873,665 Less imputed interest (24,182) Total $ 2,849,483
Lease Liabilities	Reported as of September 30, 2020 Accrued Liabilities $ 1,419,060 Other Non-Current Liabilities 1,430,423 Total $ 2,849,483

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired, and the liabilities assumed, as of the acquisition date of April 3, 2020. The valuation process is not complete and the final determination of the fair values may result in further adjustments to the values presented below: Fair Value Current Assets $ 435,722 Personal Property 562,840 Technology Licenses 245,335 In-Process R&D 11,000,000 Goodwill 3,850,711 Total assets acquired 16,094,608 Current liabilities 255,522 Deferred Tax Liability 2,220,086 Total Liabilities assumed 2,475,608 Net Assets Acquired $ 13,619,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Apr. 03, 2020	Dec. 31, 2019	[1]	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 311,216,556			$ 311,216,556			$ 307,365,845
Acquisitions				3,850,711
Amortization of intangible assets	5,600,000		$ 5,600,000	16,800,000	$ 16,800,000
Amortization expense, remainder of fiscal year	22,000,000			22,000,000
Amortization expense, year one	22,000,000			22,000,000
Amortization expense, year two	21,000,000			21,000,000
Amortization expense, year three	19,000,000			19,000,000
Amortization expense, year four	$ 16,000,000			$ 16,000,000
HomeLink®
Finite-Lived Intangible Assets [Line Items]
Goodwill									$ 307,400,000
Vaporsens Inc
Finite-Lived Intangible Assets [Line Items]
Goodwill						$ 3,850,711
Acquisitions		$ 3,900,000
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details)	9 Months Ended
	Sep. 30, 2020USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2019	$ 307,365,845	[1]
Acquisitions	3,850,711
Divestitures	0
Impairments	0
Other	0
Balance as of September 30, 2020	$ 311,216,556
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization		$ (135,100,000)	$ (120,625,000)
Intangible assets, gross		383,011,399	371,000,000
Intangible assets, net		247,911,399	250,375,000	[1]
Gentex Patents
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		38,011,452	37,328,963
Finite-lived intangible assets, accumulated amortization		(23,982,357)	(22,491,010)
Finite-lived intangible assets, net		14,029,095	14,837,953
Technology Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		292,943
Finite-lived intangible assets, accumulated amortization		(35,002)
Finite-lived intangible assets, net		257,941
HomeLink® Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		180,000,000	180,000,000
Finite-lived intangible assets, accumulated amortization		(105,000,000)	(93,750,000)
Finite-lived intangible assets, net		$ 75,000,000	86,250,000
Finite-lived intangible asset, useful life	12 years	12 years
Existing Customer Platforms
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross		$ 43,000,000	43,000,000
Finite-lived intangible assets, accumulated amortization		(30,100,000)	(26,875,000)
Finite-lived intangible assets, net		$ 12,900,000	16,125,000
Finite-lived intangible asset, useful life	10 years	10 years
Patents and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization		$ (159,117,359)	(143,116,010)
Intangible assets, gross		421,315,794	408,328,963
Intangible assets, net		262,198,435	265,212,953
HomeLink® Trade Names and Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		52,000,000	52,000,000
Exclusive Licensing Agreement
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		96,000,000	$ 96,000,000
In-Process R&D | Vaporsens Inc
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		11,000,000
In-Process R&D | Air-CraftGlass
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		$ 1,011,399
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Technology investments	$ 8,600,000	$ 9,000,000
Equity investment losses were considered to be other than temporary	$ 0

Investments (Schedule of Assets

Investments (Schedule of Assets or Liabilities, Recurring Fair Value Measurements) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	$ 400,499,542	$ 296,321,622
Market Value	202,968,580	271,275,758
Investments and Cash	603,468,122	567,597,380
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	400,499,542	296,321,622
Investments and Cash	408,625,718	352,610,965
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	0	0
Investments and Cash	194,842,404	214,986,415
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash & Cash Equivalents	0	0
Investments and Cash	0	0
Short-Term Investments | Certificate of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,270,465	50,099,795
Short-Term Investments | Certificate of Deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	1,270,465	50,099,795
Short-Term Investments | Certificate of Deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Certificate of Deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	14,105,245	29,219,685
Short-Term Investments | Corporate Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	14,105,245	29,219,685
Short-Term Investments | Corporate Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	23,235,183	58,432,823
Short-Term Investments | Government Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Government Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	23,235,183	58,432,823
Short-Term Investments | Government Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Municipal Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	11,025,844
Short-Term Investments | Municipal Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Short-Term Investments | Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	11,025,844
Short-Term Investments | Municipal Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Short-Term Investments | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,941,743	2,631,750
Short-Term Investments | Other | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	2,941,743	2,631,750
Short-Term Investments | Other | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Short-Term Investments | Other | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Certificate of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	3,913,968	3,557,798
Long-Term Investments | Certificate of Deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	3,913,968	3,557,798
Long-Term Investments | Certificate of Deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0
Long-Term Investments | Certificate of Deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	8,975,930	22,815,998
Long-Term Investments | Corporate Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	8,975,930	22,815,998
Long-Term Investments | Corporate Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	6,088,190
Long-Term Investments | Government Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Government Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	6,088,190
Long-Term Investments | Government Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Municipal Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	95,487,532	72,638,690
Long-Term Investments | Municipal Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	95,487,532	72,638,690
Long-Term Investments | Municipal Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Asset Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	42,012,670	25,791,029
Long-Term Investments | Asset Backed Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	0	0
Long-Term Investments | Asset Backed Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	42,012,670	25,791,029
Long-Term Investments | Asset Backed Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Market Value	$ 0	$ 0

Investments (Schedule of Amorti

Investments (Schedule of Amortized Cost, Unrealized Gains and Losses, and Market Value of Investment Securities) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Cost	$ 195,926,244	$ 269,889,067
Unrealized Gains	7,647,743	1,974,255
Unrealized Losses	(605,407)	(587,564)
Market Value	202,968,580	271,275,758
Short-Term Investments | Certificate of Deposit
Debt Securities, Available-for-sale [Line Items]
Cost	1,252,187	50,099,795
Unrealized Gains	18,278	0
Unrealized Losses	0	0
Market Value	1,270,465	50,099,795
Short-Term Investments | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	13,970,360	29,025,624
Unrealized Gains	134,885	194,061
Unrealized Losses	0	0
Market Value	14,105,245	29,219,685
Short-Term Investments | Government Securities
Debt Securities, Available-for-sale [Line Items]
Cost	23,105,527	58,343,911
Unrealized Gains	129,656	99,917
Unrealized Losses	0	(11,005)
Market Value	23,235,183	58,432,823
Short-Term Investments | Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	10,864,899
Unrealized Gains	160,945
Unrealized Losses	0
Market Value	11,025,844
Short-Term Investments | Other
Debt Securities, Available-for-sale [Line Items]
Cost	2,941,743	2,631,750
Unrealized Gains	0	0
Unrealized Losses	0	0
Market Value	2,941,743	2,631,750
Long-Term Investments | Certificate of Deposit
Debt Securities, Available-for-sale [Line Items]
Cost	3,754,312	3,500,000
Unrealized Gains	159,656	58,808
Unrealized Losses	0	(1,010)
Market Value	3,913,968	3,557,798
Long-Term Investments | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	8,598,910	22,306,130
Unrealized Gains	377,020	509,868
Unrealized Losses	0	0
Market Value	8,975,930	22,815,998
Long-Term Investments | Government Securities
Debt Securities, Available-for-sale [Line Items]
Cost		6,012,705
Unrealized Gains		75,485
Unrealized Losses		0
Market Value	0	6,088,190
Long-Term Investments | Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Cost	89,916,703	71,997,996
Unrealized Gains	5,580,670	1,036,116
Unrealized Losses	(9,841)	(395,422)
Market Value	95,487,532	72,638,690
Long-Term Investments | Asset Backed Securities
Debt Securities, Available-for-sale [Line Items]
Cost	41,521,603	25,971,156
Unrealized Gains	1,086,633	0
Unrealized Losses	(595,566)	(180,127)
Market Value	$ 42,012,670	$ 25,791,029

Investments (Schedule of Unreal

Investments (Schedule of Unrealized Loss on Investments) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Investments [Abstract]
Aggregate Unrealized Losses, Loss duration less than one year	$ 605,407	$ 587,564
Aggregate Fair Value, Loss duration less than one year	24,572,356	90,721,081
Aggregate Unrealized Losses, Loss duration greater than one year	0	0
Aggregate Fair Value, Loss duration greater than one year	0	0
Aggregate Unrealized Losses, Total	605,407	587,564
Aggregate Fair Value, Total	$ 24,572,356	$ 90,721,081

Investments (Investments Classi

Investments (Investments Classified by Contractual Maturity Date) (Details) - Fixed Income Securities	Sep. 30, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
Due within one year	$ 49,192,972
Due between one and five years	30,466,413
Due over five years	113,325,115
Total	$ 192,984,500

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 160,155,658	$ 164,974,553
Work-in-process	30,308,212	33,069,255
Finished goods	42,894,232	50,898,047
Total Inventory	$ 233,358,102	$ 248,941,855	[1]
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic Earnings Per Share
Net Income		$ 117,092,602	$ 111,897,852	$ 204,224,370	$ 325,136,888
Less: Dividends and undistributed earnings allocated to participating securities		1,697,281	1,389,659	2,906,048	3,699,548
Net (Loss) Income available to common shareholders		$ 115,395,321	$ 110,508,193	$ 201,318,322	$ 321,437,340
Basic weighted average shares outstanding (in shares)		241,898,117	251,075,859	243,240,699	252,811,950
Net (Loss) Income per share - Basic (in dollars per share)	[1]	$ 0.48	$ 0.44	$ 0.83	$ 1.27
Earnings Per Share, Diluted [Abstract]
Allocation of Net (Loss) Income used in basic computation		$ 115,395,321	$ 110,508,193	$ 201,318,322	$ 321,437,340
Reallocation of undistributed earnings		4,742	6,051	6,731	15,389
Net (Loss) Income available to common shareholders - Diluted		$ 115,400,063	$ 110,514,244	$ 201,325,053	$ 321,452,729
Number of shares used in basic computation		241,898,117	251,075,859	243,240,699	252,811,950
Additional weighted average dilutive common stock equivalents (in shares)		918,950	1,503,123	1,026,916	1,455,901
Diluted weighted average shares outstanding (in shares)		242,817,067	252,578,982	244,267,615	254,267,851
Net (Loss) Income per share - Diluted (in dollars per share)	[1]	$ 0.48	$ 0.44	$ 0.82	$ 1.26
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive (in shares)		412,775	3,054	412,775	170,386
[1]	(1) Earnings Per Share has been adjusted to exclude the portion of net income allocated to participating securities as a result of share-based payment awards.

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2020USD ($)planshares	Jun. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)planshares	Sep. 30, 2019USD ($)	Dec. 31, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for share-based payments	$ 6,904,725		$ 5,712,132	$ 22,865,087	$ 15,927,434
Employee Severance
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for share-based payments		$ 4,173,710
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) | shares						45,000,000
Shares issued under the Omnibus plan | shares				9,191,249
Employee Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	7,153,596			$ 7,153,596
Employee Stock Option Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period				1 year
Option expiration period				5 years
Employee Stock Option Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period				5 years
Option expiration period				10 years
Restricted Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	40,755,008			$ 40,755,008
Restricted period, maximum				10 years
Amortization expense	$ 4,366,025		3,843,962	$ 16,271,774	9,890,137
Restricted Stock Plan | Employee Severance
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization expense		$ 4,148,477
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved (in shares) | shares	2,000,000			2,000,000
ESPP discount rate				85.00%
ESPP discount rate recognized as compensation expense				15.00%
Shares granted (in shares) | shares	1,321,981			1,321,981
Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans | plan	2			2
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 5,133,550			$ 5,133,550
Amortization expense	$ 1,403,799		$ 263,392	$ 2,361,359	$ 633,576

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Weighted-Average Assumptions for the ESOP) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Dividend yield	1.98%	1.99%	1.99%	2.02%
Expected volatility	27.72%	24.25%	27.38%	23.84%
Risk-free interest rate	0.28%	1.55%	0.31%	1.85%
Expected term of options	4 years 1 month 28 days	4 years 1 month 28 days	4 years 1 month 28 days	4 years 2 months 4 days
Weighted average grant-date fair value (in dollars per share)	$ 4.64	$ 4.76	$ 4.38	$ 4.23

Comprehensive Income (AOCI Roll

Comprehensive Income (AOCI Rollforward) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019	Dec. 31, 2019	[1]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,822,607,413	$ 1,904,334,235	$ 1,938,087,820	[1]	$ 1,861,751,660
Comprehensive Income	118,800,418	110,636,126	209,960,533		325,974,721
Balance at end of period	1,895,612,299	1,921,328,263	1,895,612,299		1,921,328,263
Accumulated other comprehensive income (loss), end of period	4,447,060		4,447,060			$ (1,289,103)
Accumulated  Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	2,739,244	499,221	(1,289,103)		(1,600,338)
Balance at end of period	4,447,060	(762,505)	4,447,060		(762,505)
Accumulated other comprehensive income (loss), end of period	4,447,060	(762,505)	4,447,060		(762,505)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(2,940,052)	(1,851,574)	(2,384,589)		(1,674,887)
Other Comprehensive income (loss) before reclassifications	1,823,667	(1,623,102)	1,268,204		(1,799,789)
Comprehensive Income	1,823,667	(1,623,102)	1,268,204		(1,799,789)
Balance at end of period	(1,116,385)	(3,474,676)	(1,116,385)		(3,474,676)
Unrealized gains (losses) on available-for-sale debt securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	5,679,296	2,350,795	1,095,486		74,549
Other Comprehensive income (loss) before reclassifications	208,503	657,128	5,543,455		3,106,369
Comprehensive Income	(115,851)	361,376	4,467,959		2,637,622
Amounts reclassified from accumulated other comprehensive income	(324,354)	(295,752)	(1,075,496)		(468,747)
Balance at end of period	$ 5,563,445	$ 2,712,171	$ 5,563,445		$ 2,712,171
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Comprehensive Income (Reclassif

Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	$ (25,804,396)	$ (19,681,661)	$ (42,075,250)	$ (61,633,712)
Amounts Reclassified from Other Comprehensive Income | Unrealized gains (losses) on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities	410,575	374,370	1,361,387	593,351
Provision for income taxes	(86,221)	(78,618)	(285,891)	(124,604)
Total net reclassifications for the period	$ 324,354	$ 295,752	$ 1,075,496	$ 468,747

Debt and Financing Arrangemen_2

Debt and Financing Arrangements (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Oct. 15, 2018
Debt Instrument [Line Items]
Principal repayments of debt		$ 50,000,000	$ 0
interest rate		1.03%
Interest expense	$ 200,000	$ 600,000
Increase in borrowing rate		1.00%
Interest expense annual increase		$ 100,000
Revolving Facility
Debt Instrument [Line Items]
Principal amount				$ 150,000,000
Principal repayments of debt	50,000,000
Long-term debt	$ 25,000,000	$ 25,000,000
Credit Agreement
Debt Instrument [Line Items]
Additional borrowings available				100,000,000
Swing Loans
Debt Instrument [Line Items]
Additional borrowings available				20,000,000
Letter of Credit
Debt Instrument [Line Items]
Additional borrowings available				$ 20,000,000

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Stock repurchased (in shares)				8.2
Common stock issued under stock compensation plan (in shares)				1.9
Issuance of common stock related to acquisitions (in shares)				0.1
Net decrease in period (in shares)				6.2
Increase in quarterly dividend rate (in dollars per share)		$ 0.005
Dividends declared (in dollars per share)	$ 0.120		$ 0.115	$ 0.360	$ 0.345
Dividends declared	$ 29.4

Segment Reporting (Schedule of

Segment Reporting (Schedule of Automotive and Other Segment Reporting) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 474,638,584	$ 477,761,417	$ 1,158,325,866	$ 1,415,061,768
Income from operations	138,852,889	128,135,680	237,141,800	377,636,979
Automotive Products
Segment Reporting Information [Line Items]
Revenue	464,673,587	464,280,707	1,126,597,020	1,376,704,413
Income from operations	138,428,628	123,342,538	233,149,936	364,590,462
Other
Segment Reporting Information [Line Items]
Revenue	9,964,997	13,480,710	31,728,846	38,357,355
Income from operations	$ 424,261	$ 4,793,142	$ 3,991,864	$ 13,046,517

Income Taxes (Details)

Income Taxes (Details)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	17.10%	15.90%

Revenue (Details)

Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 474,638,584	$ 477,761,417	$ 1,158,325,866	$ 1,415,061,768
Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	464,673,587	464,280,707	1,126,597,020	1,376,704,413
Other Segment
Disaggregation of Revenue [Line Items]
Revenue	9,964,997	13,480,710	31,728,846	38,357,355
Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	464,673,587	464,280,707	1,126,597,020	1,376,704,413
Automotive Mirrors & Electronics | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	427,426,159	418,746,334	1,039,112,012	1,241,147,268
HomeLink Modules | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	37,247,428	45,534,373	87,485,008	135,557,145
Fire Protection Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	6,378,303	5,977,245	17,384,594	18,188,744
Windows Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	3,586,694	7,503,465	14,344,252	20,168,611
U.S. | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	156,521,110	145,798,028	347,952,489	431,729,037
U.S. | Other Products
Disaggregation of Revenue [Line Items]
Revenue	9,964,997	13,480,710	31,728,846	38,357,355
Germany | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	56,514,969	74,047,596	153,166,702	225,649,215
Japan | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	64,353,263	60,641,977	152,824,143	172,697,963
Mexico | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	33,342,171	43,884,609	92,882,253	130,473,702
Other | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	$ 153,942,074	$ 139,908,497	$ 379,771,433	$ 416,154,496

Leases (Details)

Leases (Details)	Sep. 30, 2020USD ($)
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	2 years
Weighted average discount rate	1.20%
2020 (excluding the nine months ended September 30, 2020)	$ 394,431
2021	1,345,977
2022	825,645
2023	268,705
2024	32,956
Thereafter	5,951
Total future minimum lease payments	2,873,665
Less imputed interest	(24,182)
Total	2,849,483
Accrued Liabilities	1,419,060
Other Non-Current Liabilities	$ 1,430,423
Operating lease, liability, current, statement of financial position	us-gaap:AccruedLiabilitiesCurrent
Operating lease, liability, noncurrent, statement of financial position	us-gaap:OtherLiabilitiesNoncurrent
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	5 years

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	Sep. 18, 2020	Apr. 03, 2020	Sep. 30, 2020
Selling, General and Administrative Expenses
Business Acquisition [Line Items]
Acquisition-related costs			$ 600
Vaporsens Inc
Business Acquisition [Line Items]
Initial investment in Vaporsens		$ 3,000
Vaporsens Inc
Business Acquisition [Line Items]
Purchase price of acquisition		10,600
Cash paid to acquire business		$ 7,100
Ownership percentage of business acquisition		100.00%
Vaporsens Inc | Common Stock
Business Acquisition [Line Items]
Equity interest investment		$ 3,500
Air-CraftGlass
Business Acquisition [Line Items]
Purchase price of acquisition	$ 1,100

Acquisitions - Schedule of Asse

Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($)	Sep. 30, 2020	Apr. 03, 2020	Dec. 31, 2019	[1]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 311,216,556		$ 307,365,845
Vaporsens Inc
Acquired Finite-Lived Intangible Assets [Line Items]
Current Assets		$ 435,722
Personal Property		562,840
Goodwill		3,850,711
Total assets acquired		16,094,608
Current liabilities		255,522
Deferred Tax Liability		2,220,086
Total Liabilities assumed		2,475,608
Net Assets Acquired		13,619,000
Technology Licenses | Vaporsens Inc
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets		245,335
In-Process R&D | Vaporsens Inc
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets		$ 11,000,000
[1]	The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.