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Merger accounting - Additional Information (Details) |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2013 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) director | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Business Acquisition [Line Items] |  |  |  |
Date of Merger |  | Jun. 28, 2013 |  |
Effective date of Merger Agreement |  | Dec. 01, 2013 |  |
Number of members in Board of Directors | director |  | 14 |  |
Percentage of ownership |  | 59.10% |  |
Exchange ratio |  | 1.3636 |  |
Goodwill resulting from merger | $ 36,972,000 | $ 63,370,000 | $ 63,370,000 |
Tax deductible goodwill in the transaction | $ 0 |  |  |
Fair value of acquisition of loan portfolio |  | $ 496,650,000 |  |
Estimated useful life of intangible assets |  | 10 years |  |
Merger related costs |  | $ 0 | 1,725,000 | $ 4,609,000
Net interest income after loan loss provision |  |  | 52,734,000 | 52,917,000
Noninterest income |  |  | 16,080,000 | 16,287,000
Noninterest expense |  |  | 52,295,000 | 49,827,000
Net loss attributable to parent |  |  | $ 16,519,000 | 19,377,000
Historical Peoples Financial Services Corp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of members in Board of Directors | director |  | 6 |  |
Penseco Financial Services Corp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of members in Board of Directors | director |  | 8 |  |
Exchange ratio | 1.3636 |  |  |
Penseco contribution |  | Penseco contributed greater than fifty percent of the total assets and tangible equity to the combined entity. |  |
Purchase price per share | $ / shares | $ 34.50 |  |  |
Common stock were retired | shares | 9,928 |  |  |
Penseco Financial Services Corp [Member] | Minimum [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of contribution of total assets and tangible equity |  | 50.00% |  |
Peoples Financial Services Corp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Net interest income after loan loss provision |  |  |  | 2,248,000
Noninterest income |  |  |  | 363,000
Noninterest expense |  |  |  | 3,115,000
Net loss attributable to parent |  |  |  | $ (261,000)

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