Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 284,053	$ 281,967	$ 551,291	$ 556,506
Cost of Goods and Services Sold	214,986	217,096	421,029	425,568
Gross profit	69,067	64,871	130,262	130,938
Operating expenses:
Selling, general and administrative expenses	58,661	59,002	114,466	120,169
Depreciation and amortization	3,233	3,514	5,849	7,173
Restructuring charges	3,698	0	7,632	0
Income from operations	3,475	2,355	2,315	3,596
Other income (expense):
Interest income	104	54	202	115
Interest expense	(2,486)	(1,517)	(5,232)	(3,085)
Other income (expense), net	279	(588)	(460)	(1,433)
Total other expense	(2,103)	(2,051)	(5,490)	(4,403)
Income (loss) before income taxes	1,372	304	(3,175)	(807)
Income tax expense	2,541	603	456	1,176
Net loss	$ (1,169)	$ (299)	$ (3,631)	$ (1,983)
Basic earnings (loss) per share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.07)	$ (0.04)
Diluted earnings (loss) per share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.07)	$ (0.04)
Comprehensive loss	$ (916)	$ (5,906)	$ (2,631)	$ (4,226)