Leased Properties - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Option to extend, amount		$ 60,198
Rent expense	$ 334,000
Minimum
Lessee, Lease, Description [Line Items]
Renewal term		1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal term		20 years