Income Taxes - Reconciliation of Statutory Federal Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory federal tax expense (benefit)	$ (72,098)	$ 25,388	$ 3,177
State income tax expense (benefit), net of federal tax expense (benefit)	(5,046)	943	300
REIT income not subject to tax	53,311	(21,522)	(1,828)
Change in valuation allowance	20,056	0	0
Other	80	363	93
Income tax expense (benefit), net	$ (3,697)	$ 5,172	$ 1,742