Fair Value - Quantitative Information about Level 3 Fair Value Measurements (Detail) (Fair Value, Measurements, Non-recurring [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,275	$ 22,872
Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	380	8,514
Valuation Technique	Sales comparison approach	Sales comparison or income approach
Discounts to appraisals for market conditions	0.00%
Commercial & Industrial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	895	1,737
Valuation Technique	Sales comparison approach	Sales comparison approach - secondary collateral
Discounts to appraisals for market conditions	0.00%	7.00%
Commercial Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		6,835
Valuation Technique		Sales comparison or income approach
Capitalization rate		8.00%
Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		3,219
Valuation Technique		Sales comparison approach
Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		250
Valuation Technique		Sales comparison approach
Discounts to appraisals for market conditions		0.00%
Loans Held for Sale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		$ 2,317
Valuation Technique		Third party bids
Weighted Average [Member] | Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions	0.00%	4.00%
Weighted Average [Member] | Commercial & Industrial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions	0.00%	7.00%
Weighted Average [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		8.00%
Weighted Average [Member] | Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		6.00%
Weighted Average [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		0.00%
Weighted Average [Member] | Loans Held for Sale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Bids from interested third parties		64.00%
Minimum [Member] | Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		0.00%
Minimum [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions, percentage		0.00%
Minimum [Member] | Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions, percentage		0.00%
Minimum [Member] | Loans Held for Sale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Bids from interested third parties		60.00%
Maximum [Member] | Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		47.00%
Maximum [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		62.00%
Maximum [Member] | Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounts to appraisals for market conditions		21.00%
Maximum [Member] | Loans Held for Sale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Bids from interested third parties		65.00%