Leases - Lease Income Under Cottonwood Sale Leaseback (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Fixed payments	$ 40,000	$ 36,667
Variable payments	20,883	20,415
Amortization of deferred lease liability	9,205	8,438
Total lease income	$ 70,088	$ 65,520