Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales:	$ 262,655	$ 266,036	$ 490,072	$ 481,373
Cost of sales	199,097	195,533	382,614	362,552
Gross profit	63,558	70,503	107,458	118,821
Selling, general, and administrative expense	36,952	38,229	70,286	72,704
Income from operations	26,606	32,274	37,172	46,117
Interest expense	219	3,130	2,280	6,399
Other (income) expense	(13)	13	576	(572)
Income before taxes	26,400	29,131	34,316	40,290
Provision for income taxes	6,487	6,294	8,058	9,101
Net income	$ 19,913	$ 22,837	$ 26,258	$ 31,189
Net earnings per share – Basic:
Income from continuing operations - Net earnings per share - Basic (in USD per share)	$ 0.62	$ 0.72	$ 0.81	$ 0.98
Income from continuing operations - Net earnings per share - Diluted (in USD per share)	$ 0.61	$ 0.70	$ 0.80	$ 0.96
Weighted Average Number of Shares Outstanding
Weighted average basic shares outstanding (in shares)	32,321	31,862	32,300	31,824
Weighted average shares outstanding, diluted (in shares)	32,642	32,553	32,630	32,498