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Operating Leases - Maturities of Lease Liabilities (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Leases [Abstract]  
2019 $ 2,613
2020 4,707
2021 4,484
2022 4,209
2023 4,061
2024 and thereafter 41,862
Total lease payments 61,936
Less: imputed interest 14,543
Operating lease liabilities $ 47,393