Transfers of Financial Assets and Mortgage Servicing Rights - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011
Residential Mortgage | Sep. 30, 2010
Residential Mortgage | Sep. 30, 2011
Residential Mortgage | Sep. 30, 2010
Residential Mortgage | Sep. 30, 2011
Loans | Sep. 30, 2010
Loans | Sep. 30, 2011
Serviced Mortgage Loans [Member] | Dec. 31, 2010
Serviced Mortgage Loans [Member] | Sep. 30, 2010
Serviced Mortgage Loans [Member] | Sep. 30, 2011
Buy Back Option Program [Member] | Dec. 31, 2010
Buy Back Option Program [Member] | Sep. 30, 2010
Buy Back Option Program [Member] | Sep. 30, 2011
Loans With Recourse [Member] | Dec. 31, 2010
Loans With Recourse [Member] | Sep. 30, 2010
Loans With Recourse [Member] | |
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] | |||||||||||||||||||
Servicing rights on whole loan sales, principal balance | $ 84,000,000 | $ 63,000,000 | |||||||||||||||||
Mortgage securitizations / Whole Loan sales, net gains | 1,600,000 | 3,000,000 | 12,000,000 | 13,200,000 | 1,700,000 | 1,400,000 | |||||||||||||
Mortgage loans serviced | 17,400,000,000 | 18,400,000,000 | 18,000,000,000 | 3,600,000,000 | 4,000,000,000 | 4,100,000,000 | |||||||||||||
Mortgage Servicing Fees Excluding Fair Value | 12,200,000 | 11,700,000 | 37,000,000 | 35,400,000 | |||||||||||||||
Weighted average mortgage servicing fees | 0.27% | 0.27% | 0.27% | 0.27% | |||||||||||||||
Mortgage loans related to buy-back option program | $ 163,000,000 | $ 168,000,000 | $ 163,000,000 |