Segment and Geographic Information - Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 330,713	$ 356,595	$ 337,096	$ 309,166	$ 352,181	$ 350,138	$ 322,868	$ 306,234	$ 1,333,570	$ 1,331,421	$ 1,091,420
Operating income (loss)	(28,640)	$ 24,938	$ 14,523	$ 9,125	(35,631)	$ (13,934)	$ 20,619	$ 9,134	19,946	(19,812)	66,882
Long-lived assets	154,743				178,921				154,743	178,921	205,719
United States | Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									965,957	926,834	672,192
Operating income (loss)									(18,959)	(45,945)	24,977
Long-lived assets	128,414				135,898				128,414	135,898	154,367
Canada | Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									174,827	202,806	179,236
Operating income (loss)									27,126	36,883	28,955
Long-lived assets	9,872				25,610				9,872	25,610	28,539
Europe | Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									56,474	85,614	90,646
Operating income (loss)									3,217	1,862	6,276
Long-lived assets	7,268				8,984				7,268	8,984	10,007
Other Foreign | Reportable Geographical Components
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									136,312	116,167	149,346
Operating income (loss)									8,562	(12,612)	6,674
Long-lived assets	$ 9,189				$ 8,429				$ 9,189	$ 8,429	$ 12,806