Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	$ 128,773	$ 126,467
Gross unrealized gains	1,320	2,956
Gross unrealized losses	2,578	132
Available-for-sale, at fair value	127,515	129,291
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	1,106	100
Gross unrealized losses	13
Fair value, Debt	1,093	100
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	33,995	35,996
Gross unrealized gains	12	27
Gross unrealized losses	1,148	43
Fair value, Debt	32,859	35,980
Mortgage-Backed Securities in Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	69,444	66,933
Gross unrealized gains	825	2,107
Gross unrealized losses	1,218	1
Fair value, Debt	69,051	69,039
Asset-Backed Securities in Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	2,796	2,862
Gross unrealized gains	24
Gross unrealized losses		39
Fair value, Debt	2,820	2,823
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	16,922	16,194
Gross unrealized gains	370	701
Gross unrealized losses	183	12
Fair value, Debt	17,109	16,883
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	4,404	4,313
Gross unrealized gains	80	112
Gross unrealized losses	15	28
Fair value, Debt	4,469	4,397
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	128,667	126,398
Gross unrealized gains	1,311	2,947
Gross unrealized losses	2,577	123
Fair value, Debt	127,401	129,222
Equity Securities in Financial Institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Equity	106	69
Gross unrealized gains	9	9
Gross unrealized losses	1	9
Fair value, Equity	114	69
Restricted Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	5,463	5,463
Fair value, Debt	5,463	5,463
Total Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, Debt	134,236	131,930
Gross unrealized gains	1,320	2,956
Gross unrealized losses	2,578	132
Fair value, Debt	$ 132,978	$ 134,754