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Leases Costs and Supplemental Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Leases [Abstract]  
Operating lease expense $ 4,690
Variable lease expense 609
Sublease income (203)
Total lease expense 5,096
ROU assets 103,801
Lease liabilities $ 110,651
Weighted-average remaining lease term 8 years 4 months 24 days
Weighted-average discount rate 3.08%
Cash paid for amounts included in the measurement of lease liabilities $ 4,639
ROU assets obtained in exchange for lease obligations $ 108,104