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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Effective portion of loss recognized in Accumulated other comprehensive loss $ (7,243) $ (6,506) $ (7,976) $ (20,163)
Effective portion of loss reclassified from Accumulated other comprehensive loss into Net loss [1] (1,466) (1,809) (3,248) (3,621)
Ineffective portion of amount of loss recognized into Net loss [1] $ (110) $ (19) $ (92) $ (77)
[1] Amounts are included in Interest expense in the unaudited condensed consolidated statements of operations and comprehensive income (loss).