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 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of loss recognized in Accumulated other comprehensive loss $ (914) $ (4,284) $ (8,890) $ (24,447)
Effective portion of loss reclassified from Accumulated other comprehensive loss into Net loss [1] (1,141) (1,825) (4,389) (5,446)
Ineffective portion of amount of loss recognized into Net loss [1] $ (65) $ 16 $ (157) $ (61)
[1] Amounts are included in Interest expense in the unaudited condensed consolidated statements of operations and comprehensive income (loss).