Contingencies And Other Disclosures (Narrative II) (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	7 Months Ended
	Mar. 31, 2013	Jul. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Visa Class B Shares [Member]	Mar. 31, 2012 Visa Class B Shares [Member]	Mar. 31, 2008 Visa Class B Shares [Member]	Mar. 31, 2013 Visa Interest [Member]	Mar. 31, 2012 Visa Interest [Member]
Loss Contingencies [Line Items]
Number of Visa Class B shares				1.1		2.4
Historical cost				$ 0
Estimated conversion ratio	42.00%
Derivative liability				2,100,000	2,900,000		2,100,000	2,900,000
Unpaid principal balance of servicing portfolio	17,000,000,000
Additional amount deposited into escrow account by Visa		150,000,000
Contingent liability							800,000
Cash payment to counterparty		800,000
Recognized servicing and P&I advances	304,800,000		330,900,000
Amount disputed related to various items for transfers of subservicers	8,600,000
Loan-to-value ratio at origination	80.00%
Accrued losses on loan repurchase exposure	185,500,000		163,300,000
Value Of Holdings If Coverted Into Classa Shares At Current Conversion Ratio				$ 84,000,000