Financial and Non-Financial Assets and Liabilities Measured using Non-Recurring Fair Value Measurements (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	$ 4,356		$ 35,110
Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	2,000
Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	1,940
Real estate owned, net | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	416	[1]	2,377	[1]
Loans held for sale | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			12,383
Loans held for sale | Continuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			20,317
Commercial real estate loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			33	[2]
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	4,356		35,110
Significant Unobservable Inputs (Level 3) | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	2,000
Significant Unobservable Inputs (Level 3) | Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	1,940
Significant Unobservable Inputs (Level 3) | Real estate owned, net | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring	416	[1]	2,377	[1]
Significant Unobservable Inputs (Level 3) | Loans held for sale | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			12,383
Significant Unobservable Inputs (Level 3) | Loans held for sale | Continuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			20,317
Significant Unobservable Inputs (Level 3) | Commercial real estate loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value disclosure non recurring			$ 33	[2]

[1] Amounts represent the carrying value of REO that resulted in gains (losses) recorded on a nonrecurring basis during the period.

[2] Amounts represent the carrying value of commercial real estate investments that resulted in gains (losses) recorded on a nonrecurring basis during the period.