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Commitments and Contingencies (Future Minimum Annual Lease Payments Under Operating Leases) (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remaining 2017 $ 317
2018 1,273
2019 1,278
2020 1,286
2021 1,282
Thereafter 36,651
Total minimum lease payments $ 42,087