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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Lessee, Lease, Description [Line Items]    
Lease costs $ 992 $ 440
Property Operating Expense    
Lessee, Lease, Description [Line Items]    
Property leases - fixed 973 427
Property leases - variable 10 4
Finance lease cost - Amortization of property right-of-use assets $ 9 $ 9