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Operating Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating cash flows from operating leases $ 4,705 $ 5,174
ROU assets obtained in exchange for lease liabilities 0 44,609
Reductions to ROU assets resulting from reductions to lease obligations $ (1,818) $ 0