Quarterly report pursuant to Section 13 or 15(d)

Leases (Components of Lease Costs) (Details)

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Leases (Components of Lease Costs) (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 $ 4,386 $ 4,519 $ 13,266 $ 13,044
Short-term lease cost 585 457 1,828 908
Variable lease cost 1,584 1,715 4,645 5,779
Total lease expense 6,555 6,691 19,739 19,731
Lease costs capitalized   11   3,470
Total lease costs $ 6,555 $ 6,702 19,739 23,201
Operating cash flows attributable to operating leases     $ 18,018 $ 20,564
Weighted-average remaining lease term 1 year 2 years 1 year 2 years
Weighted-average discount rate 6.09% 6.09% 6.09% 6.09%