Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Current	$ 16,880	$ 31,518	$ 4,152
Deferred	9,388	20,488	(2,958)
Total income tax expense	$ 26,268	$ 52,006	$ 1,194