Financial Derivatives (Referenced/Underlying Assets of Credit Default Swaps) (Details)	Jun. 30, 2013	Dec. 31, 2012
Corporation Debt [Member]
Credit Default Swaps Underlying Asset Liability Allocation	37.00%	32.00%
Commercial Mortgage Backed Securities [Member]
Credit Default Swaps Underlying Asset Liability Allocation	63.00%	54.00%
Loans Payable [Member]
Credit Default Swaps Underlying Asset Liability Allocation	0.00%	14.00%