Derivative Instruments and Hedging Activities Credit Risk - Counterparty Exposure (Details) - USD ($) $ in Thousands |
Sep. 30, 2015 |
Dec. 31, 2014 |
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| Credit Derivatives [Line Items] | ||
| Collateral Securities Repledged, Delivered, or Used | $ (50,360) | |
| Collateral Already Posted, Aggregate Fair Value | 256,202 | |
| Derivative Financial Instruments, Assets [Member] | ||
| Credit Derivatives [Line Items] | ||
| Derivative, Fair Value, Net | 296,731 | $ 380,791 |
| Derivative Financial Instruments, Liabilities [Member] | ||
| Credit Derivatives [Line Items] | ||
| Derivative, Fair Value, Net | $ (81,473) | $ (90,233) |
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The carrying value as of the balance sheet date of securities received as collateral from a counterparty that were re-pledged, sold, delivered or otherwise reused by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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