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Variable Interest Entities - Additional Information (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2014
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Dec. 31, 2013
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|---|---|---|
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Variable Interest Entity
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| Variable Interest Entity [Line Items] | ||
| Mortgage loans, carrying value | $ 0 | $ 0.2 |
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Variable Interest Entity | Mortgage Loan Commitment
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| Variable Interest Entity [Line Items] | ||
| Mortgage loans, carrying value | 0 | 0 |
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Variable Interest Entity | Equity Commitment
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| Variable Interest Entity [Line Items] | ||
| Mortgage loans, carrying value | 0 | 0.2 |
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Affordable Housing Real Estate Joint Ventures
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| Variable Interest Entity [Line Items] | ||
| Number of ventures invested by company | 23 | 25 |
| Losses realizable if tax credits received were recaptured | $ 22.3 | $ 22.5 |
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Real Estate Joint Ventures
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| Variable Interest Entity [Line Items] | ||
| Number of ventures invested by company | 5 | 6 |