Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	$ 92,696	$ 102,253
Gross Unrealized Gains, Available-for-sale	1,246	1,023
Gross Unrealized Losses, Available-for-sale	553	1,554
Fair Value, Available-for-sale	93,389	101,722
Amortized Cost, Held to maturity	38,946	44,350
Gross Unrealized Gains, Held to maturity	298
Gross Unrealized Losses, Held to maturity	383	1,707
Fair Value, Held to maturity	38,861	42,643
Amortized Cost	136,255	152,066
Gross Unrealized Gains	1,544	1,023
Gross Unrealized Losses	936	3,261
Fair Value	136,863	149,828
Restricted Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	4,613	5,463
Fair Value	4,613	5,463
U.S. Treasury Security [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	1,004	1,005
Gross Unrealized Losses, Available-for-sale	5	8
Fair Value, Available-for-sale	999	997
U.S. Government agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	20,000	22,999
Gross Unrealized Gains, Available-for-sale	7	8
Gross Unrealized Losses, Available-for-sale	285	706
Fair Value, Available-for-sale	19,722	22,301
Amortized Cost, Held to maturity	15,224	19,186
Gross Unrealized Gains, Held to maturity	78
Gross Unrealized Losses, Held to maturity	110	828
Fair Value, Held to maturity	15,192	18,358
Mortgage-backed securities of government agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	48,059	54,455
Gross Unrealized Gains, Available-for-sale	678	536
Gross Unrealized Losses, Available-for-sale	199	691
Fair Value, Available-for-sale	48,538	54,300
Amortized Cost, Held to maturity	23,722	25,164
Gross Unrealized Gains, Held to maturity	220
Gross Unrealized Losses, Held to maturity	273	879
Fair Value, Held to maturity	23,669	24,285
Other Mortgage-Backed Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	184	230
Gross Unrealized Gains, Available-for-sale	3	5
Fair Value, Available-for-sale	187	235
Asset-backed securities of government agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	2,674	2,739
Gross Unrealized Gains, Available-for-sale	17	36
Fair Value, Available-for-sale	2,691	2,775
State and political subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	16,167	16,219
Gross Unrealized Gains, Available-for-sale	460	371
Gross Unrealized Losses, Available-for-sale	64	143
Fair Value, Available-for-sale	16,563	16,447
Corporate bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	4,502	4,500
Gross Unrealized Gains, Available-for-sale	62	44
Gross Unrealized Losses, Available-for-sale		5
Fair Value, Available-for-sale	4,564	4,539
Equity securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	106	106
Gross Unrealized Gains, Available-for-sale	19	23
Gross Unrealized Losses, Available-for-sale		1
Fair Value, Available-for-sale	$ 125	$ 128