Securities valued based on internal pricing models (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |||||||||||
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Mar. 31, 2013
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Amortized Cost Basis | $ 2,382,692 | [1],[2] | ||||||||||
Fair Value | 2,495,473 | |||||||||||
Gains - Gross Unrealized | 124,795 | [1] | ||||||||||
CMBS Conduit
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Amortized Cost Basis | 215,404 | |||||||||||
Gains - Gross Unrealized | 54,263 | |||||||||||
CMBS Large Loan
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Amortized Cost Basis | 5,643 | |||||||||||
Gains - Gross Unrealized | 205 | |||||||||||
Non-Agency RMBS
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Amortized Cost Basis | 535,908 | [3] | ||||||||||
Fair Value | 583,900 | |||||||||||
Gains - Gross Unrealized | 49,218 | [3] | ||||||||||
ABS Franchise
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Amortized Cost Basis | 1,490 | [2] | ||||||||||
Fair Value | 1,384 | |||||||||||
Gains - Gross Unrealized | 219 | |||||||||||
CDOs
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Amortized Cost Basis | 66,747 | [2],[4] | ||||||||||
Fair Value | 71,625 | |||||||||||
Gains - Gross Unrealized | 4,878 | [4] | ||||||||||
Measured on a Recurring Basis | Internal Pricing Models
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Amortized Cost Basis | 65,594 | |||||||||||
Fair Value | 86,933 | |||||||||||
Impairment recorded in current period | 539 | |||||||||||
Gains - Gross Unrealized | 21,339 | |||||||||||
Measured on a Recurring Basis | Internal Pricing Models | CMBS Conduit
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Amortized Cost Basis | 23,143 | |||||||||||
Fair Value | 29,959 | |||||||||||
Impairment recorded in current period | 539 | |||||||||||
Gains - Gross Unrealized | 6,816 | |||||||||||
Weighted Average - Discount Rate | 10.00% | |||||||||||
Weighted Average - Prepayment Speed | N/A | [5] | ||||||||||
Cumulative Default Rate | 21.80% | |||||||||||
Loss Severity | 38.70% | |||||||||||
Measured on a Recurring Basis | Internal Pricing Models | CMBS Large Loan
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Amortized Cost Basis | 26,367 | |||||||||||
Fair Value | 26,885 | |||||||||||
Impairment recorded in current period | ||||||||||||
Gains - Gross Unrealized | 518 | |||||||||||
Weighted Average - Discount Rate | 2.50% | |||||||||||
Weighted Average - Prepayment Speed | N/A | [5] | ||||||||||
Cumulative Default Rate | 31.30% | |||||||||||
Loss Severity | 31.30% | |||||||||||
Measured on a Recurring Basis | Internal Pricing Models | Non-Agency RMBS
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Amortized Cost Basis | 12,481 | |||||||||||
Fair Value | 24,197 | |||||||||||
Impairment recorded in current period | ||||||||||||
Gains - Gross Unrealized | 11,716 | |||||||||||
Weighted Average - Discount Rate | 8.00% | |||||||||||
Weighted Average - Prepayment Speed | 2.80% | [5] | ||||||||||
Cumulative Default Rate | 19.90% | |||||||||||
Loss Severity | 43.00% | |||||||||||
Measured on a Recurring Basis | Internal Pricing Models | ABS Franchise
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Amortized Cost Basis | 424 | |||||||||||
Fair Value | 638 | |||||||||||
Impairment recorded in current period | ||||||||||||
Gains - Gross Unrealized | 214 | |||||||||||
Weighted Average - Discount Rate | 8.00% | |||||||||||
Weighted Average - Prepayment Speed | 0.50% | [5] | ||||||||||
Cumulative Default Rate | 44.10% | |||||||||||
Loss Severity | 99.70% | |||||||||||
Measured on a Recurring Basis | Internal Pricing Models | CDOs
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Amortized Cost Basis | 3,179 | |||||||||||
Fair Value | 5,254 | |||||||||||
Impairment recorded in current period | ||||||||||||
Gains - Gross Unrealized | $ 2,075 | |||||||||||
Weighted Average - Discount Rate | 19.80% | |||||||||||
Weighted Average - Prepayment Speed | 5.00% | [5] | ||||||||||
Cumulative Default Rate | 8.20% | |||||||||||
Loss Severity | 73.00% | |||||||||||
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