Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 745,347	$ 684,250	$ 565,153
Cost of sales	438,844	389,356	321,780
Gross profit	306,503	294,894	243,373
Selling, general and administrative expenses	118,304	118,225	100,993
Income from operations	188,199	176,669	142,380
Interest (income) expense, net	(1,503)	(192)	461
Income before income taxes	189,702	176,861	141,919
Provision for income taxes	44,964	42,289	46,791
Net income	$ 144,738	$ 134,572	$ 95,128
Basic earnings per common share	$ 2.48	$ 2.29	$ 1.62
Basic weighted average common shares outstanding	58,430,597	58,739,670	58,785,118
Diluted earnings per common share	$ 2.47	$ 2.28	$ 1.61
Diluted weighted average common shares outstanding	58,657,749	59,067,302	59,150,920
Comprehensive income	$ 144,738	$ 134,572	$ 95,128