Segment Reporting - Summary of Revenues, Gross Profit and Operating Income (Loss) by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 293,908	$ 309,166
Gross profit	54,414	59,190
Operating income (loss)	(4,139)	9,125
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	223,569	223,141
Gross profit	39,862	37,854
Operating income (loss)	(7,552)	(2,913)
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	27,619	46,651
Gross profit	5,414	12,188
Operating income (loss)	1,569	8,599
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,821	14,118
Gross profit	2,789	4,225
Operating income (loss)	159	1,471
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	28,899	25,256
Gross profit	6,349	4,923
Operating income (loss)	$ 1,685	$ 1,968