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Fair Value (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Non-Designated Hedges derivative | Sep. 30, 2014 Cash Flow Hedges derivative | Dec. 31, 2013 Interest Rate Contract [Member]
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |  |
Notional balance |  |  |  |  | $ 606,274 |  | $ 171,302 |  | $ 215,000
Weighted average interest rate (as a percent) |  |  |  |  | 1.70% | [1] | 2.50% | [1] |
Weighted average capped interest rate (as a percent) |  |  |  |  | 5.90% |  | 5.10% |  |
Number of derivative instruments held |  |  |  |  | 14 |  | 4 |  |
Hedging losses reclassified from accumulated other comprehensive income into earnings | 1,546 | 54,948 | 4,557 | 57,913 |  |  |  |  |
Estimated hedging losses to be reclassified from accumulated other comprehensive loss into earnings within the next twelve months |  |  |  |  |  |  | 5,493 |  |
Gain (Loss) on Interest Rate Fair Value Hedge Ineffectiveness | $ 0 | $ (53,484) | $ 0 | $ (51,000) |  |  |  |  |
[1] | Represents the weighted average interest rate on the hedged debt.

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- Definition Reflects the calculation as of the balance sheet date of the average interest rate weighted by interest rate caps and interest rate swaps at that time. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Average cap rate on a group of interest rate derivatives, such as interest rate caps or collars. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
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- Definition The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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- Definition The net gain (loss) recognized in earnings during the period due to the ineffectiveness on interest rate fair value hedges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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