Commitments and Contingencies (Details Textual) (USD $)	1 Months Ended	6 Months Ended
	May 31, 2011	Jun. 30, 2012	Aug. 15, 2012	Jun. 30, 2012 IRS [Member]	Feb. 24, 2012 IRS [Member]	Jun. 30, 2012 Cash [Member]
Income Tax Examination [Line Items]
Settlement		$ 24,600,000			$ 100,000	$ 2,500,000
Payment to settle the IRS dispute and related proceedings				1,900,000
Commitments and Contingencies (Textual) [Abstract]
Settlement of the claims of the putative plaintiff classes		27,100,000
Memorandum of Understanding		May 04 2011
IRS claim in the Bankruptcy Court	807,244,000
Reduction in its net operating loss carryforwards and material assessment for federal income taxes		807,244,000
Loss carry-forwards		3,400,000,000
Payment by subsidiary associated with NOL Usage Tier C		12.50%
Payment by subsidiary associated with NOL Usage Tier D		17.50%
Total par value of repurchased surplus notes			789,000,000
Principal amount of surplus notes		$ 188,446,000	$ 188,000,000