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Leases - Assets and Liabilities of Lessee (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease assets $ 25,229 $ 21,201
Current operating lease liability 8,034 6,487
Non-current operating lease liabilities 17,730 14,943
Total operating lease liability $ 25,764 $ 21,430