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Financial Instruments with Off-Balance-Sheet Risk - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Reserve for off-balance sheet credit exposures	$ 590		$ 590		$ 529
Recoveries through noninterest expense	131	(122)	61	(146)
Mortgage Partnership Finance Program [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Sum of total loans sold under the MPF Program			58,211		61,862
Limited recourse debt	8,508		8,508		8,508
Charge (recovery) to other expenses	$ (35)	$ 122	$ 17	$ 96

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- Definition

Concentration Risk Credit Risk Financial Instrument Maximum Exposure Charged (Recovery) To Noninterest Expense

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No definition available.

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- Definition

Concentration risk credit risk financial instrument maximum exposure liability.

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No definition available.

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- Definition

Limited recourse debt.

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No definition available.

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Balance Type:	credit
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- Definition

Mortgage Partnership Finance Program Recourse Liability Charges (Recoveries)

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No definition available.

+ Details

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- Definition

Sum total of loans sold under the mortgage partnership finance program.

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No definition available.

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