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Leases - Other Information (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Leases [Abstract]  
Operating cash flows from operating leases $ 6,476
Operating lease assets obtained in exchange for operating lease liabilities $ 874
Weighted-average remaining lease term 3 years 6 months 21 days
Weighted-average discount rate - operating leases 3.74%