Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current	$ 31,518	$ 4,152	$ 3,813
Deferred	20,488	(2,958)	(84,585)
Total income tax expense (benefit)	$ 52,006	$ 1,194	$ (80,772)