Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Corporation [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets) Actual, Amount	$ 256,329	$ 274,504
Total Capital (to Risk-Weighted Assets) Actual, Ratio	13.90%	15.62%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Amount	147,568	140,631
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	184,460	175,788
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets) Actual, Amount	232,946	252,240
Tier 1 Capital (to Risk-Weighted Assets) Actual, Ratio	12.63%	14.35%
Tier 1 Capital (to Risk - Weighed Assets) For Capital Adequacy, Amount	73,784	70,315
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	110,676	105,473
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets) Actual, Amount	232,946	252,240
Tier 1 Capital (to Average Assets) Actual, Ratio	10.85%	11.47%
Tier 1 Capital (to Average Assets) For Capital Adequacy, Amount	85,876	87,934
Tier 1 Capital (to Average Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	107,346	109,918
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets) Actual, Amount	238,336	246,861
Total Capital (to Risk-Weighted Assets) Actual, Ratio	13.06%	14.22%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Amount	145,991	138,841
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	182,489	173,552
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets) Actual, Amount	215,497	225,126
Tier 1 Capital (to Risk-Weighted Assets) Actual, Ratio	11.81%	12.97%
Tier 1 Capital (to Risk - Weighed Assets) For Capital Adequacy, Amount	72,995	69,421
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	109,493	104,131
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets) Actual, Amount	215,497	225,126
Tier 1 Capital (to Average Assets) Actual, Ratio	10.11%	10.31%
Tier 1 Capital (to Average Assets) For Capital Adequacy, Amount	85,277	87,310
Tier 1 Capital (to Average Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 106,597	$ 109,137
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%