Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Automotive and Other Segment Reporting

	2017		2016		2015
Revenue:
Automotive Products
United States	$	567,492,812	$	554,945,912	$	494,876,354
Germany	351,123,204		328,208,190		295,044,988
Japan	185,261,067		154,005,299		148,632,237
Other Countries	654,250,385		602,532,841		568,318,425
Other	36,745,110		39,232,514		36,745,702
Total	$	1,794,872,578	$	1,678,924,756	$	1,543,617,706
Income (Loss) from Operations:
Automotive Products	$	512,895,699	$	497,753,966	$	445,067,511
Other	10,462,653		13,988,969		13,698,928
Total	$	523,358,352	$	511,742,935	$	458,766,439
Assets:
Automotive Products	$	1,472,061,650	$	1,457,989,335	$	1,414,426,679
Other	9,576,514		9,384,154		9,429,994
Corporate	870,415,748		842,246,344		724,816,255
Total	$	2,352,053,912	$	2,309,619,833	$	2,148,672,928
Depreciation & Amortization:
Automotive Products	$	95,378,100	$	86,567,248	$	78,925,332
Other	300,935		290,296		306,908
Corporate	3,891,873		1,729,886		1,366,927
Total	$	99,570,908	$	88,587,430	$	80,599,167
Capital Expenditures:
Automotive Products	$	82,703,576	$	99,811,083	$	97,632,519
Other	170,357		200,262		161,247
Corporate	21,166,986		20,944,269		147,996
Total	$	104,040,919	$	120,955,614	$	97,941,762

Schedule of Major Product Line Revenues

Major product line revenues included within these segments are as follows:

	2017		2016		2015
Automotive Products
Automotive Mirrors	$	1,573,222,820	$	1,456,963,758	$	1,332,791,398
HomeLink® Modules*	184,904,648		182,728,485		174,080,606
Total Automotive Products	$	1,758,127,468	$	1,639,692,243	$	1,506,872,004
Other Products Revenue	$	36,745,110	$	39,232,513	$	36,745,702
Total Revenue	$	1,794,872,578	$	1,678,924,756	$	1,543,617,706

*Excludes HomeLink^® revenue integrated into automotive mirrors.

Schedule of Automotive Customers Individually Accounted For 10% or More of Net Sales

In 2017, the Company had four automotive customers (including direct sales to OEM customers and sales through their Tier 1 suppliers), which individually accounted for 10% or more of net sales as follows:

	Toyota Motor Corporation		Volkswagen Group		Ford Motor Company		Daimler AG
2017	12	%	15	%	10	%	10	%
2016	11	%	14	%	11	%	#
2015	11	%	14	%	11	%	#

# - Less than 10 percent.