Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net Sales	$ 329,665	$ 299,236	$ 864,918	$ 789,308
Cost of sales	244,222	222,658	650,830	605,272
Gross profit	85,443	76,578	214,088	184,036
Selling, general, and administrative expense	41,584	45,158	120,448	115,444
Income from operations	43,859	31,420	93,640	68,592
Interest expense	218	17	385	2,297
Other expense (income)	53	84	(1,542)	660
Income before taxes	43,588	31,319	94,797	65,635
Provision for income taxes	9,828	6,843	21,686	14,901
Net income	$ 33,760	$ 24,476	$ 73,111	$ 50,734
Net earnings per share:
Basic (in USD per share)	$ 1.03	$ 0.75	$ 2.24	$ 1.57
Diluted (in USD per share)	$ 1.02	$ 0.75	$ 2.22	$ 1.55
Weighted average shares outstanding:
Basic (in shares)	32,635	32,470	32,606	32,357
Diluted (in shares)	32,969	32,770	32,902	32,677