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Leases (Supplemental Cash Flows Information) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 8,237 $ 6,472
Right-of-use assets obtained in exchange for lease obligations:    
Operating leases $ 5,706 $ 21,399