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Leases Lease Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Amortization of right-of-use assets $ 139 $ 134
Interest on lease liabilities 36 43
Operating lease cost 12,087 16,640
Short-term lease cost 238 470
Total lease cost $ 12,500 $ 17,287