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Regulatory matters - Schedule of Bank's Capital Amounts and Ratios (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Consolidated [Member]
    
Schedule of Capitalization [Line Items]    
Tier 1 capital to risk-weighted assets, Actual Amount $ 163,092 $ 102,906
Total capital to risk-weighted assets, Actual Amount 171,160 109,978
Tier 1 capital to average assets, Actual Amount 163,092 102,906
Tier 1 capital to risk-weighted assets, Actual Ratio 13.59% 16.80%
Total capital to risk-weighted assets, Actual Ratio 14.26% 17.96%
Tier 1 capital to average assets, Actual Ratio 10.09% 11.50%
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount 48,009 24,497
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount 96,019 48,994
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount 64,664 35,799
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio 4.00% 4.00%
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio 8.00% 8.00%
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio 4.00% 4.00%
Peoples Bank [Member]
    
Schedule of Capitalization [Line Items]    
Tier 1 capital to risk-weighted assets, Actual Amount 156,731 99,185
Total capital to risk-weighted assets, Actual Amount 164,799 106,135
Tier 1 capital to average assets, Actual Amount 156,731 99,185
Tier 1 capital to risk-weighted assets, Actual Ratio 13.02% 16.22%
Total capital to risk-weighted assets, Actual Ratio 13.69% 17.35%
Tier 1 capital to average assets, Actual Ratio 9.72% 11.14%
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount 48,161 24,467
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount 96,322 48,934
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount 64,469 35,621
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio 4.00% 4.00%
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio 8.00% 8.00%
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio 4.00% 4.00%
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount 72,241 36,700
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount 120,402 61,167
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount $ 80,586 $ 44,526
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio 6.00% 6.00%
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio 10.00% 10.00%
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio 5.00% 5.00%