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Leases - Other Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Leases [Abstract]    
Operating cash flows from operating leases $ 2,949 $ 5,568
Right-of-use assets obtained in an exchange for operating lease obligations $ 1,110 $ 3,501