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Commitments and Contingencies (Schedule of Future Maturities of Operating Lease Liabilities) (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Commitments and Contingencies [Abstract]  
2019 $ 6,164
2020 11,979
2021 11,224
2022 8,088
Total lease payments 37,455
Less: imputed interest 3,331
Total lease liabilities $ 34,124