Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales:	$ 227,417	$ 215,337
Cost of sales	183,517	167,019
Gross profit	43,900	48,318
Selling, general, and administrative expense	33,334	34,475
Income from operations	10,566	13,843
Interest expense	2,061	3,269
Other expense (income)	589	(585)
Income before taxes	7,916	11,159
Provision for income taxes	1,571	2,807
Net income	$ 6,345	$ 8,352
Net earnings per share – Basic:
Income from continuing operations - Net earnings per share - Basic (in USD per share)	$ 0.20	$ 0.26
Income from continuing operations - Net earnings per share - Diluted (in USD per share)	$ 0.19	$ 0.26
Weighted Average Number of Shares Outstanding
Weighted average basic shares outstanding (in shares)	32,279	31,786
Weighted average shares outstanding, diluted (in shares)	32,617	32,444