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Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaps Associated with Borrowings (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
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Jun. 30, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Dec. 31, 2012
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|---|---|---|---|---|---|---|
| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | $ 57,015,981 | $ 43,379,217 | $ 37,366,610 | $ 36,472,401 | $ 44,262,605 | $ 22,377,656 |
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Interest Rate Swap [Member]
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 27,770,655 | 23,628,148 | 19,619,000 | 17,575,000 | 18,485,000 | 14,070,000 |
|
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member]
|
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 15,640,000 | 14,425,000 | ||||
| Derivative, Average Fixed Interest Rate | 1.07% | 0.698% | ||||
| Derivative, Average Variable Interest Rate | 0.234% | 0.235% | ||||
| Derivative, Average Remaining Period Until Maturity | 3.08 | 2.50 | ||||
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Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Within One Year From Balance Sheet Date [Member]
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 3,900,000 | |||||
| Derivative, Average Fixed Interest Rate | 0.30% | |||||
| Derivative, Average Variable Interest Rate | 0.245% | |||||
| Derivative, Average Remaining Period Until Maturity | 0.76 | |||||
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Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over One And Within Two Years From Balance Sheet Date [Member]
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 6,100,000 | 1,000,000 | ||||
| Derivative, Average Fixed Interest Rate | 0.622% | 0.383% | ||||
| Derivative, Average Variable Interest Rate | 0.234% | 0.244% | ||||
| Derivative, Average Remaining Period Until Maturity | 1.82 | 1.04 | ||||
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Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member]
|
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 6,385,000 | 2,950,000 | ||||
| Derivative, Average Fixed Interest Rate | 1.074% | 0.626% | ||||
| Derivative, Average Variable Interest Rate | 0.235% | 0.246% | ||||
| Derivative, Average Remaining Period Until Maturity | 2.87 | 2.42 | ||||
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Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member]
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | 1,125,000 | 5,300,000 | ||||
| Derivative, Average Fixed Interest Rate | 1.314% | 0.92% | ||||
| Derivative, Average Variable Interest Rate | 0.234% | 0.217% | ||||
| Derivative, Average Remaining Period Until Maturity | 3.74 | 3.49 | ||||
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Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Four Years From Balance Sheet Date [Member]
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| Derivative [Line Items] | ||||||
| Derivative, Notional Amount | $ 2,030,000 | $ 1,275,000 | ||||
| Derivative, Average Fixed Interest Rate | 2.268% | 1.406% | ||||
| Derivative, Average Variable Interest Rate | 0.234% | 0.242% | ||||
| Derivative, Average Remaining Period Until Maturity | 7.14 | 5.04 |