Disclosures about Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Parenthetical) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member]	Mar. 31, 2013 Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan Held for Sale Exposed to Fraud				$ 5,200,000
Loan Held for Sale Range of possible loss, Minimum				1,500,000
Loan Held For Sale Range of possible loss, Maximum				3,200,000
Loss contingency provided by management	0	2,000,000		2,000,000
Loan held for sale not exposed to fraud			1,000,000
Loans recovered in cash from alleged perpetrator			1,500,000
Loans transferred to Other assets			2,700,000
Loans reserve transferred to Other assets			$ 2,000,000