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Leases and Leases Commitments - Supplemental Information Related to Leases (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Leases [Abstract]  
Operating cash flows used for operating leases $ 30,235
Right-of-use assets obtained in exchange for lease liabilities $ 16,564
Weighted-average remaining lease term 6 years 9 months 18 days
Weighted-average discount rate 8.64%