Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details)

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Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details) - Interest Rate Swap - Cash flow hedge - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]    
Effective portion of gain (loss) recognized in Accumulated other comprehensive income (loss) $ 13,668 $ (733)
Effective portion of loss reclassified from Accumulated other comprehensive loss into Net loss [1] (738) (1,782)
Ineffective portion of amount of loss recognized into Net loss [1] $ 0 $ 18
[1] Amounts are included in Interest expense in the unaudited condensed consolidated statements of operations and comprehensive income (loss). Upon the adoption of ASU 2017-12 on January 1, 2018, ineffectiveness is no longer measured or recognized.