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Parent Company financial statements - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income | $ 8,185 | $ 8,312 | $ 7,576 | $ 5,281 | $ 5,032 | $ 7,148 | $ 7,144 | $ 6,412 | $ 29,354 | $ 25,736 | $ 24,920
Adjustments: |  |  |  |  |  |  |  |  |  |  |
Decrease in other assets |  |  |  |  |  |  |  |  | (12,268) | (3,363) | 816
Increase (decrease) in other liabilities |  |  |  |  |  |  |  |  | 13,549 | 2,389 | (1,736)
Stock based compensation |  |  |  |  |  |  |  |  | 570 | 554 | 272
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 37,180 | 37,079 | 32,626
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  | (201,240) | (184,721) | (134,806)
Cash flows used in financing activities: |  |  |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  |  |  |  |  |  | 16,000 |
Retirement of common stock |  |  |  |  |  |  |  |  | (6,893) | (634) |
Net cash provided by financing activities |  |  |  |  |  |  |  |  | 361,099 | 146,179 | 97,308
Increase (decrease) in cash |  |  |  |  |  |  |  |  | 197,039 | (1,463) | (4,872)
Cash and cash equivalents at beginning of period |  |  |  | 31,153 |  |  |  |  | 31,153 |  |
Cash and cash equivalents at end of period | 228,192 |  |  |  | 31,153 |  |  |  | 228,192 | 31,153 |
Peoples Bank |  |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 29,354 | 25,736 | 24,920
Adjustments: |  |  |  |  |  |  |  |  |  |  |
Net losses (gains) on investment securities |  |  |  |  |  |  |  |  | 6 | (132) | (14)
Undistributed net income of subsidiaries | (19,814) |  |  |  | (15,609) |  |  |  | (19,814) | (15,609) | (15,331)
Decrease in other assets |  |  |  |  |  |  |  |  | (255) | (302) | (106)
Increase (decrease) in other liabilities |  |  |  |  |  |  |  |  | 148 |  | (10)
Stock based compensation |  |  |  |  |  |  |  |  | 570 | 554 | 272
Increase in due from subsidiaries |  |  |  |  |  |  |  |  |  | 1,974 |
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 10,009 | 12,221 | 9,731
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Purchase of equity securities |  |  |  |  |  |  |  |  |  |  | (234)
Sale of equity securities |  |  |  |  |  |  |  |  | 279 |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  | 279 |  | (234)
Cash flows used in financing activities: |  |  |  |  |  |  |  |  |  |  |
Investment in subsidiary |  |  |  |  |  |  |  |  | (30,000) |  |
Retirement of common stock |  |  |  |  |  |  |  |  | (6,893) | (634) |
Cash dividends paid |  |  |  |  |  |  |  |  | (10,518) | (10,131) | (9,693)
Net cash provided by financing activities |  |  |  |  |  |  |  |  | (14,411) | (10,765) | (9,693)
Increase (decrease) in cash |  |  |  |  |  |  |  |  | (4,123) | 1,456 | (196)
Cash and cash equivalents at beginning of period |  |  |  | $ 5,192 |  |  |  | $ 3,736 | 5,192 | 3,736 | 3,932
Cash and cash equivalents at end of period | $ 1,069 |  |  |  | $ 5,192 |  |  |  | 1,069 | $ 5,192 | $ 3,736
Subordinated Debentures |  |  |  |  |  |  |  |  |  |  |
Cash flows used in financing activities: |  |  |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  |  |  |  |  | 33,000 |  |
Subordinated Debentures | Peoples Bank |  |  |  |  |  |  |  |  |  |  |
Cash flows used in financing activities: |  |  |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  |  |  |  |  | $ 33,000 |  |

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