Contingent Liabilities and Commitments with Off-Balance Sheet Risk - Summary of Financial Instruments with Off-Balance-Sheet Risk (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Commitments to extend credit	$ 135,056,000	$ 118,887,000
Unfunded limited partner equity commitment	3,746,000	4,000,000
Secured [Member]
Loss Contingencies [Line Items]
Standby letters of credit and financial guarantees written	2,722,000	2,509,000
Unsecured [Member]
Loss Contingencies [Line Items]
Standby letters of credit and financial guarantees written	$ 8,000	$ 8,000