Fair Value (Quantitative Information About Level 3 Inputs) (Details) (Commercial Mortgage Backed Securities [Member])	12 Months Ended
Dec. 31, 2013
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Prepayment rate	8.00%
Default rate	10.00%
Loss severity	10.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Prepayment rate	15.00%
Default rate	15.00%
Loss severity	25.00%
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Prepayment rate	10.00%
Default rate	12.50%
Loss severity	18.00%

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Loss, including interest and principal, incurred on a defaulted security, expressed as a percentage of the original principal balance, used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

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- Definition

Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

+ References

+ Details

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- Definition

Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value.

+ References

+ Details

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