Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Lease Expense) (Details)

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Commitments and Contingencies (Lease Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies    
Operating lease cost $ 3,246 $ 3,199
Shared lease costs (1,873) (1,876)
Variable lease cost 593 801
Total lease expense $ 1,966 $ 2,124