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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Bank's Actual Capital Ratios (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Consolidated    
Total Capital to risk weighted assets    
Actual, Amount $ 141,288 $ 139,033
Actual, Ratio 14.30% 14.60%
Minimum Capital Requirement, Amount $ 91,230 $ 82,391
Minimum Capital Requirement, Ratio 9.25% 8.625%
Tier 1 (Core) Capital to risk weighted assets    
Actual, Amount $ 128,928 $ 127,033
Actual, Ratio 13.10% 13.30%
Minimum Capital Requirement, Amount $ 71,504 $ 63,286
Minimum Capital Requirement, Ratio 7.25% 6.625%
Common Tier 1 (CET1) to risk weighted assets    
Actual, Amount $ 128,928 $ 127,033
Actual, Ratio 13.10% 13.30%
Minimum Capital Requirement, Amount $ 56,710 $ 48,957
Minimum Capital Requirement, Ratio 5.75% 5.125%
Tier 1 (Core) Capital to average assets    
Actual, Amount $ 128,928 $ 127,033
Actual, Ratio 9.10% 9.30%
Minimum Capital Requirement, Amount $ 56,607 $ 54,453
Minimum Capital Requirement, Ratio 4.00% 4.00%
Bank    
Total Capital to risk weighted assets    
Actual, Amount $ 129,419 $ 126,408
Actual, Ratio 13.10% 13.20%
Minimum Capital Requirement, Amount $ 91,162 $ 82,328
Minimum Capital Requirement, Ratio 9.25% 8.625%
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 98,554 $ 95,453
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 10.00% 10.00%
Tier 1 (Core) Capital to risk weighted assets    
Actual, Amount $ 117,068 $ 114,417
Actual, Ratio 11.90% 12.00%
Minimum Capital Requirement, Amount $ 71,452 $ 63,238
Minimum Capital Requirement, Ratio 7.25% 6.625%
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 78,843 $ 76,363
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 8.00% 8.00%
Common Tier 1 (CET1) to risk weighted assets    
Actual, Amount $ 117,068 $ 114,417
Actual, Ratio 11.90% 12.00%
Minimum Capital Requirement, Amount $ 56,668 $ 48,920
Minimum Capital Requirement, Ratio 5.75% 5.125%
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 64,060 $ 62,045
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 6.50% 6.50%
Tier 1 (Core) Capital to average assets    
Actual, Amount $ 117,068 $ 114,417
Actual, Ratio 8.30% 8.40%
Minimum Capital Requirement, Amount $ 56,622 $ 54,500
Minimum Capital Requirement, Ratio 4.00% 4.00%
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 70,778 $ 68,126
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 5.00% 5.00%