NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Key Economic Assumptions Used in Determining Fair Value at Time of Sale of Loans (Detail)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Government Guaranteed Mortgage Loans [Member] | Maximum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	9.60%	10.50%
Discount rate	11.50%	12.00%
Government Guaranteed Mortgage Loans [Member] | Minimum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	9.10%	9.10%
Discount rate	11.50%	11.50%
Conventional Loan [Member] | Maximum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	9.40%	10.90%
Discount rate	9.50%	10.00%
Conventional Loan [Member] | Minimum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	8.90%	9.20%
Discount rate	9.50%	9.50%
Conventional Non Conforming Mortgage Loans [Member] | Maximum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	13.80%	14.30%
Discount rate	13.90%	14.30%
Conventional Non Conforming Mortgage Loans [Member] | Minimum [Member]
Assumption For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities [Line Items]
Constant prepayment rate	12.70%	13.00%
Discount rate	13.80%	13.80%