Changes in the Corporation's liability of estimated losses associated with customary respresentations and warranties related to loans sold by E-LOAN (Detail) (Indemnification Guarantee Member, E Loan [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Indemnification Guarantee Member | E Loan [Member]
Guarantor Obligations [Line Items]
Balance as of beginning of period	$ 10,131	$ 29,016	$ 10,625	$ 30,659
Valuation Allowances And Reserves Charged To Other Accounts	0	0	0	0
Valuation Allowances And Reserves Charged To Cost And Expense	(1,841)	0	(1,841)	(522)
Valuation Allowances And Reserves Deductions	(1)	(807)	(495)	(1,928)
Balance as of end of period	$ 8,289	$ 28,209	$ 8,289	$ 28,209