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PARENT COMPANY ONLY - Condensed Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
ASSETS |  |  |
Other assets | $ 32,831 | $ 22,137 |
TOTAL ASSETS | 2,239,100 | 1,654,145 |
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Subordinated debt | 16,553 | 6,500 |
Other liabilities | 27,692 | 12,186 |
Stockholders' equity | 299,756 | 244,452 | $ 197,368
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | 2,239,100 | 1,654,145 |
Parent Company [Member] |  |  |
ASSETS |  |  |
Cash | 7,246 | 6,485 |
Other assets | 4 | 109 |
TOTAL ASSETS | 316,468 |  | $ 251,029
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Subordinated debt | 16,553 | 6,500 |
Other liabilities | 159 | 77 |
Stockholders' equity | 299,756 | 244,452 |
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | 316,468 | 251,029 |
Subsidiaries [Member] | Citizens and Northern Bank |  |  |
ASSETS |  |  |
Investment in subsidiaries | 292,455 | 228,413 |
Subsidiaries [Member] | Citizens and Northern Investment Corporation |  |  |
ASSETS |  |  |
Investment in subsidiaries | 12,959 | 12,353 |
Subsidiaries [Member] | Bucktail Life Insurance Company |  |  |
ASSETS |  |  |
Investment in subsidiaries | $ 3,804 | $ 3,669 |

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