Operating Segments - Reconciliation of Segment Gross Profit to Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Gross profit	$ 18,690	$ 20,335	$ 35,919	$ 38,559
Selling, general and administrative	(17,232)	(13,752)	(34,377)	(30,552)
Amortization of intangibles	(104)	(274)	(208)	(417)
Total other expenses	358	2,252	3,655	4,219
Income (loss) before income taxes	996	4,057	(2,321)	3,371
Operating Segments
Segment Reporting Information [Line Items]
Gross profit	18,690	20,335	35,919	38,559
Segment Reconciling Items
Segment Reporting Information [Line Items]
Selling, general and administrative	(17,232)	(13,752)	(34,377)	(30,552)
Amortization of intangibles	(104)	(274)	(208)	(417)
Total other expenses	$ (358)	$ (2,252)	$ (3,655)	$ (4,219)