Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current tax benefit (expense)	$ (496)	$ (1,083)	$ (420)
Deferred tax benefit (expense)	10,408	0	0
Income tax benefit (expense)	$ (9,912)	$ 1,083	$ 420