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Fair Value (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 21 Months Ended
--- | --- | --- | --- | ---
May 31, 2016 USD ($) | Sep. 30, 2016 USD ($) derivative | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) derivative | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) derivative
Derivative instruments and Hedging Activities |  |  |  |  |  |
Payments for Hedge, Financing Activities |  |  |  | $ 14,847,000 | $ 0 |
Income (loss) on cash flow hedges |  | $ 719,000 | $ (31,000) | (73,826,000) | $ (67,000) |
Estimated hedging losses to be reclassified from accumulated other comprehensive loss into earnings within the next twelve months |  |  |  | $ 6,978,000 |  |
Cash Flow Hedges |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |
Number of derivative instruments held | derivative |  | 11 |  | 11 |  | 11
Interest Rate Cap [Member] | Cash Flow Hedges |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |
Notional amount |  | $ 36,108,000 |  | $ 36,108,000 |  | $ 36,108,000
Weighted average interest rate (as a percent) |  | 2.70% |  | 2.70% |  | 2.70%
Weighted average capped interest rate (as a percent) |  | 5.90% |  | 5.90% |  | 5.90%
Interest Rate Swap [Member] | Cash Flow Hedges |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |
Notional amount |  | $ 800,000,000 |  | $ 800,000,000 |  | $ 800,000,000
Weighted average capped interest rate (as a percent) |  | 2.30% |  | 2.30% |  | 2.30%
Notional amounts entered into during period |  |  |  | $ 600,000,000 |  | $ 1,200,000,000
Derivative, Notional Amounts Settled During Period | $ 400,000,000 |  |  |  |  |
Not Designated as Hedging Instrument [Member] |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |
Number of derivative instruments held | derivative |  | 15 |  | 15 |  | 15
Not Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |
Notional amount |  | $ 722,943,000 |  | $ 722,943,000 |  | $ 722,943,000
Weighted average interest rate (as a percent) |  | 2.60% |  | 2.60% |  | 2.60%
Weighted average capped interest rate (as a percent) |  | 6.20% |  | 6.20% |  | 6.20%

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