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Condensed Bank of Marin Bancorp Parent Only Financial Statements - Condensed Unconsolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash Flows from Operating Activities: |  |  |
Total consolidated income | $ (8,409) | $ 19,895 | $ 46,586
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Noncash director compensation expense | 513 | 398 | 355
Other assets | (6,695) | (4,149) | 2,228
Other liabilities | 172 | 2,378 | (4,708)
Net cash provided by operating activities | 28,365 | 35,659 | 55,277
Cash Flows from Investing Activities: |  |  |
Net cash provided by (used in) investing activities | 195,174 | 334,691 | (218,097)
Cash Flows from Financing Activities: |  |  |
Restricted stock surrendered for tax withholdings upon vesting | (64) | (70) | (40)
Cash dividends paid on common stock | (16,197) | (16,106) | (15,673)
Stock repurchased, including commissions and excise tax | (4,253) | 0 | (1,250)
Net cash (used in) provided by financing activities | (116,688) | (385,321) | (139,397)
Net (decrease) increase in cash, cash equivalents and restricted cash | 106,851 | (14,971) | (302,217)
Cash, cash equivalents and restricted cash at beginning of period | 30,453 | 45,424 | 347,641
Cash, cash equivalents and restricted cash at end of period | 137,304 | 30,453 | 45,424
Stock issued in payment of director fees | 513 | 398 | 355
Bancorp |  |  |
Cash Flows from Operating Activities: |  |  |
Total consolidated income | (8,409) | 19,895 | 46,586
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Earnings of bank subsidiary (greater) less than dividends received from bank subsidiary | 32,029 | (1,096) | (31,649)
Noncash director compensation expense | 71 | 60 | 36
Other assets | (76) | 99 | (12)
Other liabilities | 39 | (86) | (129)
Net cash provided by operating activities | 23,654 | 18,872 | 14,832
Cash Flows from Investing Activities: |  |  |
Capital contribution to bank subsidiary | (38) | (276) | (899)
Net cash provided by (used in) investing activities | (38) | (276) | (899)
Cash Flows from Financing Activities: |  |  |
Restricted stock surrendered for tax withholdings upon vesting | (64) | (70) | (40)
Cash dividends paid on common stock | (16,197) | (16,106) | (15,673)
Stock repurchased, including commissions and excise tax | (4,253) | 0 | (1,250)
Proceeds from stock options exercised and stock issued under employee and director stock purchase plans | 38 | 276 | 899
Net cash (used in) provided by financing activities | (20,476) | (15,900) | (16,064)
Net (decrease) increase in cash, cash equivalents and restricted cash | 3,140 | 2,696 | (2,131)
Cash, cash equivalents and restricted cash at beginning of period | 7,189 | 4,493 | 6,624
Cash, cash equivalents and restricted cash at end of period | 10,329 | 7,189 | 4,493
Stock issued in payment of director fees | 513 | 398 | 355
Stock issued to employee stock ownership plan | $ 1,149 | $ 1,315 | $ 1,233

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