Fair Value of Financial Instruments - Carrying Value and Fair Value Measurements of Financial Assets and Liabilities on Non Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Assets
Loans	$ 9,782	$ 21,313
OREO	2,390	5,434
Total	12,172	26,747
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets
Loans	0
OREO	0
Total	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets
Loans	0
OREO	0
Total	0
Significant Unobservable Inputs (Level 3) [Member]
Assets
Loans	9,782	21,313
OREO	2,390	5,434
Total	$ 12,172	$ 26,747