Segment Reporting - Reconciliation of EBITDA to Income Before Taxes (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
Reconciliation of total segment EBITDA to income before taxes
Total segment EBITDA from continuing operations									$ 45,512	$ 83,401	$ 47,023
Interest, net									(20,044)	(18,328)	(7,508)
Income tax expense									(3,142)	(17,846)	(10,291)
Depreciation and amortization									(16,927)	(15,966)	(13,252)
Net income from continuing operations	$ (4,013)	$ 4,026	$ (328)	$ 5,714	$ (1,615)	$ 14,760	$ 12,155	$ 5,960	$ 5,399	$ 31,261	$ 15,972