Total Gains (Losses) on Assets and Liabilities Measured on Fair Values on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, gains (losses)			$ (261)		$ (283)		$ 904
Loans held for sale | Continuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, gains (losses)		[1]		[1]		[1]	2,776	[1]
Loans held for sale | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, gains (losses)		[1]	14	[1]		[1]	(1,062)	[1]
Real estate owned, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, gains (losses)			(275)		(283)		(689)
Commercial real estate investments, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets and liabilities, gains (losses)							$ (121)

[1] Loans held for sale, net were measured at fair value as of March 31, 2012, however, they do not appear in the table presenting financial and nonfinancial assets and liabilities measured using nonrecurring fair value measurements at June 30, 2013 and December 31, 2012 above, as there were no loans classified as held for sale as of those dates.