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Condensed Bank of Marin Bancorp Parent Only Financial Statements - Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Other assets | $ 68,961 | $ 62,284 |  |
Total assets | 2,023,493 | 2,031,134 |  |
Subordinated debentures | 5,586 | 5,395 |  |
Other liabilities | 14,644 | 16,040 |  |
Total liabilities | 1,792,930 | 1,816,661 |  |
Stockholders' equity | 230,563 | 214,473 | $ 200,026 | $ 180,887
Total liabilities and stockholders' equity | 2,023,493 | 2,031,134 |  |
Bancorp |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and due from Bank of Marin | 3,568 | 3,796 |  |
Investment in bank subsidiary | 232,431 | 215,722 |  |
Other assets | 670 | 770 |  |
Total assets | 236,669 | 220,288 |  |
Subordinated debentures | 5,586 | 5,395 |  |
Accrued expenses payable | 96 | 109 |  |
Other liabilities | 424 | 311 |  |
Total liabilities | 6,106 | 5,815 |  |
Stockholders' equity | 230,563 | 214,473 |  |
Total liabilities and stockholders' equity | $ 236,669 | $ 220,288 |  |

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