Carrying Value of Assets Measured at Fair Value on Non-Recurring Basis and the Level within Fair Value Hierarchy (Detail) (Level 3, USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Measured at Fair Value on Non-Recurring Basis	$ 273,692	$ 271,709
Non Performing Loans Held for Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Measured at Fair Value on Non-Recurring Basis	10,832	10,895
Impaired Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Measured at Fair Value on Non-Recurring Basis	204,598	197,620
MSR, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Measured at Fair Value on Non-Recurring Basis	9,356	9,204
REO, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Measured at Fair Value on Non-Recurring Basis	$ 48,906	$ 53,990