Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before income taxes, equity in non-consolidated affiliates and noncontrolling interest	$ 87,078	$ (49,716)	$ (17,416)
Statutory income tax rate	26.50%	26.50%	26.50%
Tax expense (benefit) using statutory income tax rate	$ 23,076	$ (13,175)	$ (4,615)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	8,863	(94)	3,524
Non-deductible stock-based compensation	1,441	1,123	665
Other non-deductible expense	(220)	1,848	163
Change to valuation allowance	(103,212)	6,605	3,565
Impact of tax reform	4,463	(4,579)	1,906
Impact of tax reform	(100,472)	0	0
Noncontrolling interests	(4,413)	(1,287)	(2,399)
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(2,453)	0	0
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	4,863	155	952
Income tax provision (benefit)	$ (168,064)	$ (9,404)	$ 3,761
Effective income tax rate	(193.00%)	18.90%	(21.60%)