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- Lease Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease cost $ 3,795 $ 3,722
Short-term lease cost 224 277
Depreciation of leased assets 439 498
Interest on lease liabilities 496 520
Total finance lease cost 935 1,018
Total lease cost $ 4,954 $ 5,017