Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current Income Tax Expense:
Federal	$ 2,033	$ (5,380)	$ (3,530)
State	9,316	13,015	9,772
Current Income Tax Expense	11,349	7,635	6,242
Deferred Income Tax Expense (Benefit):
Federal	49,911	48,287	(60,547)
State	56	72	1,346
Deferred Income Tax Expense (Benefit)	49,967	48,359	(59,201)
Income Tax Expense (Benefit)	$ 61,316	$ 55,994	$ (52,959)