Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1	1	1	5
Balance	$ 32	$ 58	$ 32	$ 245
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number		1		5
Balance		58		245
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1		1
Balance	$ 32		$ 32