Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Schedule Of Automotive And Other Segment Reporting

	2012		2011		2010
Revenue:
Automotive Products
United States	$	382,308,501	$	334,692,637	$	274,165,934
Germany	239,081,723		248,495,295		212,555,637
Japan	100,422,507		76,123,221		64,412,780
Other	355,160,210		343,850,209		245,957,611
Other	22,586,580		20,600,687		19,171,452
Total	$	1,099,559,521	$	1,023,762,049	$	816,263,414
Income (Loss) from Operations:
Automotive Products	$	231,713,972	$	231,030,145	$	191,430,183
Other	2,741,260		337,780		(458,114		)
Total	$	234,455,232	$	231,367,925	$	190,972,069
Assets:
Automotive Products	$	619,337,527	$	566,395,900	$	391,514,600
Other	8,010,779		8,993,853		6,687,533
Corporate	638,343,029		600,637,249		604,488,506
Total	$	1,265,691,335	$	1,176,027,002	$	1,002,690,639
Depreciation & Amortization:
Automotive Products	$	47,976,800	$	40,314,620	$	35,722,078
Other	317,534		320,900		275,599
Corporate	1,885,489		1,999,164		2,622,997
Total	$	50,179,823	$	42,634,684	$	38,620,674
Capital Expenditures:
Automotive Products	$	113,611,526	$	115,377,859	$	43,031,399
Other	228,635		58,996		203,654
Corporate	3,634,288		4,740,875		3,661,897
Total	$	117,474,449	$	120,177,730	$	46,896,950

Schedule Of Automotive Customers Individually Accounted For 10% Or More Of Net Sales

	Toyota Motor Corporation		VW/Audi		Hyundai/Kia		Daimler AG		General Motors
2012	14	%	14	%	11	%	11	%	10	%
2011	12	%	15	%	11	%	11	%	12	%
2010	15	%	13	%	#		12	%	15	%