Employee Benefit Plans (Details Textuals) (United States Pension Plans of US Entity, Defined Benefit [Member])	6 Months Ended
	Jun. 30, 2012
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Subsidiaries issuance of group annuity and life insurance contracts supporting employee benefit plan assets primarily invested in separate accounts sponsored by subsidiaries	99.00%