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Leases Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]        
Amortization of right-of-use assets $ 35 $ 34 $ 69 $ 64
Interest on lease liabilities 9 11 19 22
Operating lease cost 3,105 4,257 7,095 7,364
Short-term lease cost 64 120 234 134
Total lease cost $ 3,213 $ 4,422 $ 7,417 $ 7,584