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Leases (Other Information) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Cash paid for amounts included in the measurement of lease liabilities  
Operating cash flows from operating leases $ 31,538
Operating cash flows from finance leases 651
Financing cash flows from finance leases 935
Leased assets obtained in exchange for new operating lease liabilities $ 18,562