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Leases - Lease Cost and Other Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Operating lease cost $ 2,781 $ 2,760 $ 8,315 $ 8,331
Variable lease payments 251 17 416 256
Cash paid for amounts included in the measurement of operating lease liabilities $ 884 $ 802 $ 2,628 $ 2,412