Segment and Geographic Information - Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 321,802	$ 308,524	$ 297,686	$ 293,908	$ 330,713	$ 356,595	$ 337,096	$ 309,166	$ 1,221,920	$ 1,333,570	$ 1,331,421
Operating income (loss)	26,315	$ 20,505	$ 8,145	$ (4,139)	(28,640)	$ 24,938	$ 14,523	$ 9,125	50,826	19,946	(19,812)
Long-lived assets	165,967				150,449				165,967	150,449	178,921
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									924,580	965,957	926,834
Operating income (loss)									28,048	(18,959)	(45,945)
Long-lived assets	140,099				124,120				140,099	124,120	135,898
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									129,291	174,827	202,806
Operating income (loss)									16,156	27,126	36,883
Long-lived assets	9,464				9,872				9,464	9,872	25,610
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									60,238	56,474	85,614
Operating income (loss)									981	3,217	1,862
Long-lived assets	7,575				7,268				7,575	7,268	8,984
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									107,811	136,312	116,167
Operating income (loss)									5,641	8,562	(12,612)
Long-lived assets	$ 8,829				$ 9,189				$ 8,829	$ 9,189	$ 8,429