Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 200,395	$ 179,571
Cost of sales	110,699	110,206
Gross profit	89,696	69,365
Selling, general and administrative expenses	34,561	30,166
Income from operations	55,135	39,199
Interest income, net	(522)	(56)
Income before income taxes	55,657	39,255
Provision for income taxes	13,255	7,700
Net income	$ 42,402	$ 31,555
Basic earnings per common share	$ 0.73	$ 0.54
Basic weighted average common shares outstanding	58,129,529	58,543,478
Diluted earnings per common share	$ 0.73	$ 0.54
Diluted weighted average common shares outstanding	58,323,721	58,829,177
Comprehensive income	$ 42,402	$ 31,555