Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Income [Abstract]
NET SALES	$ 269,467,967	$ 206,832,953	$ 763,415,405	$ 594,162,842
COST OF GOODS SOLD	174,182,650	133,073,198	492,188,780	377,940,892
Gross profit	95,285,317	73,759,755	271,226,625	216,221,950
OPERATING EXPENSES:
Engineering, research and development	20,668,537	16,463,760	59,829,055	46,024,900
Selling, general & administrative	12,370,000	10,323,698	35,813,024	29,830,097
Total operating expenses	33,038,537	26,787,458	95,642,079	75,854,997
Income from operations	62,246,780	46,972,297	175,584,546	140,366,953
OTHER INCOME (EXPENSE)
Investment income	543,996	620,160	1,642,021	1,689,047
Other, net	1,707,840	2,578,853	8,475,379	6,141,627
Total other income	2,251,836	3,199,013	10,117,400	7,830,674
Income before provision for income taxes	64,498,616	50,171,310	185,701,946	148,197,627
PROVISION FOR INCOME TAXES	21,101,552	15,880,066	61,499,831	47,386,923
NET INCOME	$ 43,397,064	$ 34,291,244	$ 124,202,115	$ 100,810,704
EARNINGS PER SHARE:
Basic	$ 0.30	$ 0.25	$ 0.87	$ 0.73
Diluted	$ 0.30	$ 0.24	$ 0.86	$ 0.72
Cash Dividends Declared per Share	$ 0.12	$ 0.11	$ 0.36	$ 0.33