Fair Value (Narrative) (Details) (Municipal bonds, Level 2)	Mar. 31, 2013 issuer security
Municipal bonds \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities not priced by primary provider	10
Number of issuers	5

Number of Issuers of Securities Not Priced by the Primary Provider

No definition available.

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