Unaudited Condensed Consolidated Statements of Income - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
NET SALES		$ 474,638,584	$ 477,761,417	$ 1,158,325,866	$ 1,415,061,768
COST OF GOODS SOLD		286,401,872	297,440,131	769,556,865	888,558,373
Gross profit		188,236,712	180,321,286	388,769,001	526,503,395
OPERATING EXPENSES:
Engineering, research and development		27,812,730	29,398,725	86,421,121	85,847,249
Selling, general & administrative		21,571,093	22,786,881	65,206,080	63,019,167
Total operating expenses		49,383,823	52,185,606	151,627,201	148,866,416
Income from operations		138,852,889	128,135,680	237,141,800	377,636,979
OTHER INCOME
Investment income		1,825,257	3,353,510	5,733,939	8,756,638
Other income, net		2,218,852	90,323	3,423,881	376,983
Total other income		4,044,109	3,443,833	9,157,820	9,133,621
INCOME BEFORE PROVISION FOR INCOME TAXES		142,896,998	131,579,513	246,299,620	386,770,600
PROVISION FOR INCOME TAXES		25,804,396	19,681,661	42,075,250	61,633,712
NET INCOME		$ 117,092,602	$ 111,897,852	$ 204,224,370	$ 325,136,888
EARNINGS PER SHARE:
Basic (in dollars per share)	[1]	$ 0.48	$ 0.44	$ 0.83	$ 1.27
Diluted (in dollars per share)	[1]	0.48	0.44	0.82	1.26
Cash Dividends Declared per Share (in dollars per share)		$ 0.120	$ 0.115	$ 0.360	$ 0.345

[1] (1) Earnings Per Share has been adjusted to exclude the portion of net income allocated to participating securities as a result of share-based payment awards.