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Commitments and Contingencies - Schedule of Minimum Principal Payments Due on Long-term Debt (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2018 $ 3,281
2019 4,375
2020 4,375
2021 4,375
2022 4,375
Thereafter $ 150,938