Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Total revenues	$ 612,843	$ 629,710	$ 612,229
Cost of sales	483,298	492,195	477,220
Gross profit	129,545	137,515	135,009
Selling, general and administrative expenses	91,302	97,964	93,700
Amortization of intangible assets	1,377	1,381	1,381
Operating profit	36,866	38,170	39,928
Interest expense, net	2,975	2,916	1,572
Other expense (income), net	(502)	293	(692)
Income from continuing operations before income taxes	34,393	34,961	39,048
Income tax expense	9,315	7,816	18,918
Net income from continuing operations	25,078	27,145	20,130
Loss from discontinued operations, net of tax	(28,600)	(5,361)	(2,225)
Net income (loss)	$ (3,522)	$ 21,784	$ 17,905
Earnings Per Share, Basic and Diluted [Abstract]
Basic and diluted earnings per share, continuing operations (in dollars per share)	$ 1.83	$ 1.98	$ 1.47
Basic and diluted earnings per share, discontinued operations (in dollars per share)	(2.09)	(0.39)	(0.16)
Basic and diluted earnings per share (in dollars per share)	$ (0.26)	$ 1.59	$ 1.31
Basic weighted average shares outstanding (in shares)	13,690	13,699	13,673
Diluted weighted average shares outstanding (in shares)	13,726	13,731	13,685