Changes in the Corporation's Liability of Estimated Losses Associated with Customary Respresentations and Warranties Related to Loans Sold by E-LOAN (Detail) (E-Loan, Guarantee on loans sold or serviced with representation and warranties, USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
E-Loan | Guarantee on loans sold or serviced with representation and warranties
Guarantor Obligations [Line Items]
Balance as of beginning of period	$ 30,688	$ 31,937	$ 30,659	$ 33,294
Additions for new sales
(Reversal) provision for representation and warranties	(605)	5,197	(522)	6,430
Net charge-offs / terminations	(1,067)	(3,651)	(1,121)	(6,241)
Balance as of end of period	$ 29,016	$ 33,483	$ 29,016	$ 33,483