Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 245,524	$ 200,395
Cost of sales	149,723	110,699
Gross profit	95,801	89,696
Selling, general and administrative expenses	31,312	34,561
Income from operations	64,489	55,135
Interest income, net	(3)	(522)
Income before income taxes	64,492	55,657
Provision for income taxes	15,947	13,255
Net income	$ 48,545	$ 42,402
Basic earnings per common share	$ 0.42	$ 0.37
Basic weighted average common shares outstanding	115,663,366	116,259,058
Diluted earnings per common share	$ 0.42	$ 0.36
Diluted weighted average common shares outstanding	116,017,400	116,647,442
Comprehensive income	$ 48,545	$ 42,402