Income Taxes - Schedule of Income Tax Expense (Benefit) Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Tax (benefit) expense at U.S. federal statutory income tax rate on income or loss subject to tax	$ (21,085)	$ (4,581)	$ (12,630)
State income tax expense, net of federal tax	(1,222)	6,081	(606)
Gross receipts and margin taxes	1,716	1,847	1,383
Foreign rate differential	632	647	2,269
Effect of permanent differences	6	(280)	(298)
Return to provision adjustments	1,597	287	(368)
Re-measurement of deferred tax assets and liabilities	17,080	0	0
Increase (decrease) in valuation allowance	(57)	472	443
Total income tax (benefit) expense	$ (1,333)	$ 4,473	$ (9,807)