Unaudited Condensed Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
NET SALES	$ 338,436,964	$ 286,973,898	$ 674,176,308	$ 556,472,867
COST OF GOODS SOLD	204,144,736	184,361,279	408,585,273	360,396,745
Gross profit	134,292,228	102,612,619	265,591,035	196,076,122
OPERATING EXPENSES:
Engineering, research and development	20,234,074	18,864,182	40,723,301	37,547,758
Selling, general & administrative	14,222,716	12,152,166	27,854,750	23,078,454
Total operating expenses	34,456,790	31,016,348	68,578,051	60,626,212
Income from operations	99,835,438	71,596,271	197,012,984	135,449,910
OTHER INCOME
Investment income	398,005	625,717	723,163	1,121,130
Other, net	5,388,560	4,906,951	9,577,946	6,311,811
Total other income	5,786,565	5,532,668	10,301,109	7,432,941
Income before provision for income taxes	105,622,003	77,128,939	207,314,093	142,882,851
PROVISION FOR INCOME TAXES	28,895,257	25,031,542	62,021,276	45,354,887
NET INCOME	$ 76,726,746	$ 52,097,397	$ 145,292,817	$ 97,527,964
EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.53	$ 0.36	$ 1.00	$ 0.68
Diluted (in dollars per share)	$ 0.52	$ 0.36	$ 0.99	$ 0.68
Cash Dividends Declared per Share (in dollars per share)	$ 0.16	$ 0.14	$ 0.3	$ 0.28