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Regulatory matters - Schedule of Bank's Capital Amounts and Ratios (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Consolidated |  |
Common equity Tier 1 capital to risk-weighted assets |  |
Common equity Tier 1 capital to risk-weighted assets, Actual Amount | $ 205,222 | $ 194,877
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio | 11.85% | 12.49%
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 77,930 | $ 70,205
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Tier 1 capital to risk-weighted assets |  |
Tier 1 capital to risk-weighted assets, Actual Amount | $ 205,222 | $ 194,877
Tier 1 capital to risk-weighted assets, Actual Ratio | 11.85% | 12.49%
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 103,906 | $ 93,607
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 6.00% | 6.00%
Total capital to risk-weighted assets |  |
Total capital to risk-weighted assets, Actual Amount | $ 224,182 | $ 210,838
Total capital to risk-weighted assets, Actual Ratio | 12.95% | 13.51%
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 138,542 | $ 124,810
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 8.00% | 8.00%
Tier 1 capital to average assets |  |
Tier 1 capital to average assets, Actual Amount | $ 205,222 | $ 194,877
Tier 1 capital to average assets, Actual Ratio | 9.94% | 10.16%
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount | $ 82,564 | $ 76,760
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio | 4.00% | 4.00%
Peoples Bank |  |
Common equity Tier 1 capital to risk-weighted assets |  |
Common equity Tier 1 capital to risk-weighted assets, Actual Amount | $ 199,450 | $ 189,128
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio | 11.53% | 12.14%
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 77,843 | $ 70,120
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount | $ 112,440 | $ 101,284
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio | 6.50% | 6.50%
Tier 1 capital to risk-weighted assets |  |
Tier 1 capital to risk-weighted assets, Actual Amount | $ 199,450 | $ 189,128
Tier 1 capital to risk-weighted assets, Actual Ratio | 11.53% | 12.14%
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 103,791 | $ 93,493
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 6.00% | 6.00%
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount | $ 138,388 | $ 124,657
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio | 8.00% | 8.00%
Total capital to risk-weighted assets |  |
Total capital to risk-weighted assets, Actual Amount | $ 218,410 | $ 205,089
Total capital to risk-weighted assets, Actual Ratio | 12.63% | 13.16%
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount | $ 138,388 | $ 124,657
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio | 8.00% | 8.00%
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount | $ 172,985 | $ 155,822
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 |  |
Tier 1 capital to average assets, Actual Amount | $ 199,450 | $ 189,128
Tier 1 capital to average assets, Actual Ratio | 9.68% | 9.88%
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount | $ 82,406 | $ 76,602
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio | 4.00% | 4.00%
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount | $ 103,008 | $ 95,753
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio | 5.00% | 5.00%

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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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