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Leases (Supplemental Information) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating cash outflows from operating leases $ 7,090 $ 5,464
Non-cash investing activities relating to operating lease right-of-use assets $ 10,919 $ 40,646
Weighted-average remaining lease term of operating leases 7 years 2 months 12 days 7 years 7 months 6 days
Weighted-average discount rate used to recognize operating lease right-of-use-assets 5.40% 5.90%