Condensed Consolidated Statements of Income (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
NET SALES	$ 335,739,344	$ 269,498,969
COST OF GOODS SOLD	204,440,537	176,035,466
Gross profit	131,298,807	93,463,503
OPERATING EXPENSES:
Engineering, research and development	20,489,227	18,683,576
Selling, general & administrative	13,632,034	10,926,288
Total operating expenses	34,121,261	29,609,864
Income from operations	97,177,546	63,853,639
OTHER INCOME
Investment income	325,158	495,413
Other, net	4,189,386	1,404,860
Total other income	4,514,544	1,900,273
Income before provision for income taxes	101,692,090	65,753,912
PROVISION FOR INCOME TAXES	33,126,019	20,323,345
NET INCOME	$ 68,566,071	$ 45,430,567
EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.47	$ 0.32
Diluted (in dollars per share)	$ 0.47	$ 0.32
Cash Dividends Declared per Share (in dollars per share)	$ 0.14	$ 0.14