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Regulatory matters - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Schedule of Capitalization [Line Items] |  |
Percentage of capital stock | 100.00% |
Payment of dividends description | The Penseco merger agreement contemplates that, unless 80 percent of our Board of Directors determines otherwise, the Company will pay a quarterly cash dividend in an amount no less than $0.31 per share through 2018, provided that sufficient funds are legally available, and that the Company and Peoples Bank remain "well-capitalized" in accordance with applicable regulatory guidelines. |
Period of accumulated net earnings acquired as a result of merger related to dividend | 7 years |
Loans outstanding | $ 0 | $ 0
Advances made | $ 0 | $ 0
Maximum [Member] |  |
Schedule of Capitalization [Line Items] |  |
Percentage of funds transfer to affiliate | 10.00% |
Minimum [Member] |  |
Schedule of Capitalization [Line Items] |  |
Percentage of net earnings to surplus funds | 10.00% |
Quarterly cash dividend per share | $ 0.31 |

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- Definition Description of dividends paid, restrictions on dividend payments, statutory capital and surplus amounts, requirements and future requirements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 + Details
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