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Derivative Instruments - Summary of Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Derivative Asset [Abstract] |  |
Derivative instruments | $ 29,721 | $ 4,464
Derivative Liability [Abstract] |  |
Total derivative instrument assets | 29,721 | 4,464
Total derivative instrument liabilities | 8,094 | 12,968
Interest rate swaps | Derivatives designated as hedging instruments: |  |
Derivative Asset [Abstract] |  |
Derivative instruments | 1,407 | 0
Derivative Liability [Abstract] |  |
Derivative liability, current | 0 | 5,218
Interest rate swaps | Derivatives not designated as hedging instruments: |  |
Derivative Liability [Abstract] |  |
Derivative liability, noncurrent | 230 | 330
Contingent redemption features - Series A Preferred Stock | Derivatives not designated as hedging instruments: |  |
Derivative Asset [Abstract] |  |
Derivative instruments | 28,314 | 4,464
Cross currency and interest rate swaps | Derivatives not designated as hedging instruments: |  |
Derivative Liability [Abstract] |  |
Derivative liability, noncurrent | $ 7,864 | $ 7,420

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