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Leases (Lease Cost) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Lease cost $ 11,236 $ 11,555
Cash paid for amounts included in the measurement of lease liabilities reported in operating cash flows 10,830 11,657
Right-of-use assets obtained in exchange for new lease liabilities $ 1,612 $ 4,966