Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net Sales	$ 285,814	$ 262,655	$ 535,253	$ 490,072
Cost of sales	213,556	199,097	406,608	382,614
Gross profit	72,258	63,558	128,645	107,458
Selling, general, and administrative expense	37,667	36,952	78,864	70,286
Income from operations	34,591	26,606	49,781	37,172
Interest expense	214	219	167	2,280
Other (income) expense	(1,787)	(13)	(1,595)	576
Income before taxes	36,164	26,400	51,209	34,316
Provision for income taxes	8,872	6,487	11,858	8,058
Net income	$ 27,292	$ 19,913	$ 39,351	$ 26,258
Net earnings per share:
Basic (in USD per share)	$ 0.84	$ 0.62	$ 1.21	$ 0.81
Diluted (in USD per share)	$ 0.83	$ 0.61	$ 1.20	$ 0.80
Weighted average shares outstanding:
Basic (in shares)	32,605	32,321	32,596	32,300
Diluted (in shares)	32,860	32,642	32,868	32,630