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Note 21 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities |  |  |
Net income | $ 79,593 | $ 82,217 | $ 61,063
Adjustments to reconcile net income to net cash from operating activities: |  |  |
Stock-based compensation expense | 3,316 | 3,384 | 3,377
Stock grants to directors for retainer fees | 423 | 350 | 359
Other assets | (25,797) | (30,189) | (437)
Accrued interest and other liabilities | 27,893 | 14,252 | 32,524
Cash flows from investing activities |  |  |
Net cash for investing activities | (425,436) | (395,932) | (554,999)
Cash flows from financing activities |  |  |
Proceeds from stock option exercises, net of cashless exercises | 0 | 0 | 36
Employee stock purchase plan | 50 | 45 | 45
Dividend reinvestment plan | 810 | 891 | 867
Net proceeds from subordinated notes issuance | 0 | 0 | 14,645
Payment of cash dividends to common shareholders | (22,473) | (21,004) | (19,602)
Net cash for financing activities | 586,795 | 363,080 | (443,251)
Net change in cash and cash equivalents | 262,477 | 33,761 | (878,388)
Cash and cash equivalents at beginning of period | 130,533 | 96,772 | 975,160
Cash and cash equivalents at end of period | 393,010 | 130,533 | 96,772
Parent Company [Member] |  |  |
Cash flows from operating activities |  |  |
Net income | 79,593 | 82,217 | 61,063
Adjustments to reconcile net income to net cash from operating activities: |  |  |
Equity in undistributed net income of subsidiary | (60,142) | (66,464) | (44,221)
Stock-based compensation expense | 3,316 | 3,384 | 3,377
Stock grants to directors for retainer fees | 423 | 350 | 359
Other assets | (4,116) | (128) | 858
Accrued interest and other liabilities | 990 | 1,045 | 1,636
Net cash from operating activities | 20,064 | 20,404 | 23,072
Cash flows from investing activities |  |  |
Net capital investment into subsidiaries | 0 | 0 | (15,000)
Net cash for investing activities | 0 | 0 | (15,000)
Cash flows from financing activities |  |  |
Proceeds from stock option exercises, net of cashless exercises | 0 | 0 | 36
Employee stock purchase plan | 50 | 45 | 45
Dividend reinvestment plan | 810 | 891 | 867
Net proceeds from subordinated notes issuance | 0 | 0 | 14,645
Payment of cash dividends to common shareholders | (22,473) | (21,004) | (19,602)
Net cash for financing activities | (21,613) | (20,068) | (4,009)
Net change in cash and cash equivalents | (1,549) | 336 | 4,063
Cash and cash equivalents at beginning of period | 18,969 | 18,633 | 14,570
Cash and cash equivalents at end of period | $ 17,420 | $ 18,969 | $ 18,633

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