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Commitments and Contingencies - Operating Minimum Lease Payments (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2018 $ 3,659
2019 2,630
2020 2,235
2021 2,187
2022 1,887
Thereafter 6,246
Total minimum lease payments 18,844
Capital Leases  
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2018 66
2019 0
2020 0
2021 0
2022 0
Thereafter 0
Total minimum lease payments 66
Less: Amount representing interest (2)
Present value of capital lease and financing obligations 64
Financing Obligations  
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2018 2,792
2019 2,792
2020 2,792
2021 2,792
2022 2,564
Thereafter 25,650
Total minimum lease payments 39,382
Less: Amount representing interest (19,853)
Present value of capital lease and financing obligations $ 19,529