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Summary of Impact of Derivative Financial Instruments to Condensed Consolidated Statements of Operations (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Derivative Financial Instruments [Line Items] | ||||
| Realized Gains (Losses) | $ (1,610) | $ (2,073) | $ 251 | $ (1,849) |
| Net Change in Unrealized Gain (Loss) | (13,409) | 7,602 | 6,913 | 6,154 |
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Freestanding Derivatives | Interest Rate Contracts
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| Derivative Financial Instruments [Line Items] | ||||
| Realized Gains (Losses) | (2,687) | (1,538) | (2,551) | (536) |
| Net Change in Unrealized Gain (Loss) | 1,022 | 3,087 | 7,619 | 1,907 |
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Freestanding Derivatives | Foreign Currency Contracts
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| Derivative Financial Instruments [Line Items] | ||||
| Realized Gains (Losses) | 1,070 | (591) | 2,795 | (1,291) |
| Net Change in Unrealized Gain (Loss) | (14,386) | 4,536 | (665) | 4,266 |
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Freestanding Derivatives | Other Credit Derivatives
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| Derivative Financial Instruments [Line Items] | ||||
| Realized Gains (Losses) | 7 | 56 | 7 | (22) |
| Net Change in Unrealized Gain (Loss) | (21) | (19) | ||
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Freestanding Derivatives | Credit Default Swaps
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| Derivative Financial Instruments [Line Items] | ||||
| Net Change in Unrealized Gain (Loss) | (45) | (41) | ||
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Fair Value Hedges - Interest Rate Swaps
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| Derivative Financial Instruments [Line Items] | ||||
| Hedge Ineffectiveness | 1,342 | 1,164 | 548 | 597 |
| Excluded from Assessment of Effectiveness | 4,950 | 7,049 | (938) | (374) |
| Realized Gains (Losses) | $ 22,941 | $ 22,941 | ||