Fair Value - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of capitalization rates utilized to determine fair value	8.50%
Transfers between level 1 and level 2	$ 0
Transfers out consisted of charge-offs	1,300,000
Recorded sales	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans classified as level 3 transfers in	2,200,000
Loans classified as level 3 transfers out	0
Other real estate owned and other reductions	5,600,000
Other real estate owned and other reductions classified as level 3 transfers out	5,000,000
Valuation write-downs	500,000
Other real estate revenue	4,500,000
Other real estate owned and other reductions classified as level three transfers in	$ 2,200,000