Derivative Instruments - Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest expense	$ 97,226	$ 57,358	$ 189,525	$ 125,930
Amount of Gain (Loss) Recognized in Net Loss on Derivative	(598)	(50)	(345)	(3,802)
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Net Loss on Derivative	0	0	0	(3,674)
Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Net Loss on Derivative	(598)	(50)	(345)	(128)
AOCI into Net Loss \| Reclassified from AOCI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest expense	3,596	(6,059)	3,325	(8,770)
Cash Flow Hedging \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative	$ 15,826	$ (14,759)	$ 75,726	$ (4,198)

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Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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