Fair Values of Financial Instruments - Schedule of Estimated Fair Values of Recognized Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financial assets:
Securities available for sale	$ 93,389	$ 101,722
Securities held-to-maturity	38,861	42,643
Bank-owned life insurance	9,681	9,551
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	36,354	42,599
Securities available for sale	93,389	101,722
Securities held-to-maturity	38,946	44,350
Restricted stock	4,613	5,463
Loans held for sale	562
Net loans	406,867	374,040
Bank-owned life insurance	9,681	9,551
Accrued interest receivable	1,365	1,374
Financial liabilities:
Deposits	483,672	480,933
Short-term borrowings	50,523	48,671
Other borrowings	17,280	12,459
Accrued interest payable	88	96
Fair Value [Member]
Financial assets:
Cash and cash equivalents	36,354	42,599
Securities available for sale	93,389	101,722
Securities held-to-maturity	38,861	42,643
Restricted stock	4,613	5,463
Loans held for sale	562
Net loans	410,678	375,055
Bank-owned life insurance	9,681	9,551
Accrued interest receivable	1,365	1,374
Financial liabilities:
Deposits	484,347	481,695
Short-term borrowings	50,523	48,671
Other borrowings	17,775	12,559
Accrued interest payable	88	96
Fair Value [Member] | Level I [Member]
Financial assets:
Cash and cash equivalents	36,354	42,599
Securities available for sale	1,124	1,125
Loans held for sale	562
Bank-owned life insurance	9,681	9,551
Accrued interest receivable	1,365	1,374
Financial liabilities:
Deposits	353,597	346,589
Short-term borrowings	50,523	48,671
Accrued interest payable	88	96
Fair Value [Member] | Level II [Member]
Financial assets:
Securities available for sale	92,265	100,597
Securities held-to-maturity	38,861	42,643
Restricted stock	4,613	5,463
Fair Value [Member] | Level III [Member]
Financial assets:
Net loans	410,678	375,055
Financial liabilities:
Deposits	130,750	135,106
Other borrowings	$ 17,775	$ 12,559