Summary of Significant Accounting Policies - Summary of Impacts of ASC 842 on Condensed Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net sales	$ 139,115	$ 152,568
Cost of sales	93,556	105,453
Gross profit	45,559	47,115
Selling, general and administrative expenses	34,468	35,473
(Gain) loss on disposal of fixed assets	(43)	(380)
Impairment charges	916	0
Operating income	10,218	12,022
Interest expense, net	(1,049)	(1,639)
Income from continuing operations before income taxes	9,169	10,383
Income tax expense	2,526	2,628
Income from continuing operations	6,643	$ 7,755
Assets
Right of use asset - operating leases	5,529			$ 0
Deferred income taxes	5,350			5,270
Liabilities
Other current liabilities	13,634			16,701
Operating lease liability - short-term	1,895			0
Operating lease liability - long-term	3,878			0
Other liabilities	19,114			19,794
Shareholders’ Equity
Retained deficit	(138,306)			$ (141,187)
ASU 2016-02 [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net sales	139,115
Cost of sales	93,556
Gross profit	45,559
Selling, general and administrative expenses	34,468
(Gain) loss on disposal of fixed assets	(43)
Impairment charges	916
Operating income	10,218
Interest expense, net	1,049
Income from continuing operations before income taxes	9,169
Income tax expense	2,526
Income from continuing operations	6,643
Assets
Right of use asset - operating leases	5,529		$ 5,900
Deferred income taxes	5,350
Liabilities
Other current liabilities	13,634
Operating lease liability - short-term	1,895
Operating lease liability - long-term	3,878
Other liabilities	19,114
Shareholders’ Equity
Retained deficit	(138,306)
Adjustments [Member] | ASU 2016-02 [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Selling, general and administrative expenses	(34)
Operating income	34
Income from continuing operations before income taxes	34
Income tax expense	9
Income from continuing operations	25
Assets
Right of use asset - operating leases	(5,529)
Deferred income taxes	332
Liabilities
Other current liabilities	244
Operating lease liability - short-term	(1,895)
Operating lease liability - long-term	(3,878)
Other liabilities	1,203
Shareholders’ Equity
Retained deficit	(871)
Balances Without Adoption of ASC 842 [Member] | ASU 2016-02 [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net sales	139,115
Cost of sales	93,556
Gross profit	45,559
Selling, general and administrative expenses	34,434
(Gain) loss on disposal of fixed assets	(43)
Impairment charges	916
Operating income	10,252
Interest expense, net	1,049
Income from continuing operations before income taxes	9,203
Income tax expense	2,535
Income from continuing operations	6,668
Assets
Deferred income taxes	5,682
Liabilities
Other current liabilities	13,878
Other liabilities	20,317
Shareholders’ Equity
Retained deficit	$ (139,177)