Investments (Details Textuals 31) (Subsequent payment default [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Agricultural
Financing Receivable, Modifications [Line Items]
Number of Mortgage Loans	0	0
Carrying Value after Specific Valuation Allowance	$ 0
Commercial
Financing Receivable, Modifications [Line Items]
Number of Mortgage Loans	0	0
Residential
Financing Receivable, Modifications [Line Items]
Number of Mortgage Loans	0	0