Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 335,872	$ 231,502	$ 892,991	$ 652,545
Cost of sales	207,622	146,538	550,668	385,479
Gross profit	128,250	84,964	342,323	267,066
Selling, general and administrative expenses	30,154	28,027	97,383	91,598
Income from operations	98,096	56,937	244,940	175,468
Interest income, net	(10)	(208)	0	(801)
Income before income taxes	98,106	57,145	244,940	176,269
Provision for income taxes	24,311	14,435	61,235	43,938
Net income	$ 73,795	$ 42,710	$ 183,705	$ 132,331
Basic earnings per common share	$ 0.64	$ 0.37	$ 1.59	$ 1.14
Basic weighted average common shares outstanding	115,344,015	115,773,030	115,455,543	115,921,463
Diluted earnings per common share	$ 0.64	$ 0.37	$ 1.59	$ 1.14
Diluted weighted average common shares outstanding	115,625,760	116,134,623	115,767,426	116,280,807
Comprehensive income	$ 73,795	$ 42,710	$ 183,705	$ 132,331