Regulatory matters - Schedule of Bank's Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Consolidated
Common equity Tier 1 capital to risk-weighted assets
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 321,403	$ 308,211
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio	0.1210	0.1113
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 119,577	$ 124,569
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0450	0.0450
Tier 1 capital to risk-weighted assets
Tier 1 capital to risk-weighted assets, Actual Amount	$ 321,403	$ 308,211
Tier 1 capital to risk-weighted assets, Actual Ratio	0.1210	0.1113
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 159,436	$ 166,093
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0600	0.0600
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 376,341	$ 335,683
Total capital to risk-weighted assets, Actual Ratio	0.1416	0.1213
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 212,581	$ 221,457
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0800	0.0800
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 321,403	$ 308,211
Tier 1 capital to average assets, Actual Ratio	0.0850	0.0903
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount	$ 151,252	$ 136,559
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio	0.0400	0.0400
Peoples Bank
Common equity Tier 1 capital to risk-weighted assets
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 353,330	$ 339,596
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio	0.1330	0.1227
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 119,561	$ 124,563
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0450	0.0450
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 172,699	$ 179,924
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0650	6.50
Tier 1 capital to risk-weighted assets
Tier 1 capital to risk-weighted assets, Actual Amount	$ 353,330	$ 339,596
Tier 1 capital to risk-weighted assets, Actual Ratio	0.1330	0.1227
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 159,414	$ 166,083
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0600	0.0600
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 212,552	$ 221,444
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0800	8.00
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 375,268	$ 367,068
Total capital to risk-weighted assets, Actual Ratio	0.1412	0.1326
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 212,552	$ 221,444
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	0.0800	0.0800
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 265,690	$ 276,806
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.1000	10.00
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 353,330	$ 339,596
Tier 1 capital to average assets, Actual Ratio	0.0934	0.0969
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount	$ 151,274	$ 140,167
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio	0.0400	0.0400
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 189,093	$ 175,209
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0500	5.00

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Tier 1 Common Equity Risk Based Capital as defined in the regulations.

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Amount of total capital as defined by regulatory framework.

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Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Topic 942
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