v3.25.4
INDEPENDENT BANK CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION - Statements of Cash Flows (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 02, 2025
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of Cash Flows [Abstract]                        
Net income   $ 18,572 $ 17,502 $ 16,877 $ 15,590 $ 18,461 $ 13,810 $ 18,528 $ 15,991 $ 68,541 $ 66,790 $ 59,067
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH FROM OPERATING ACTIVITIES                        
Deferred income tax expense (benefit)                   (3,531) (1,248) 215
Share based compensation                   2,716 2,332 2,229
(Increase) decrease in accrued income and other assets                   (25,648) (25,187) (14,617)
Increase (decrease) in accrued expenses and other liabilities                   17,886 1,017 (3,597)
Total Adjustments                   8,121 (3,639) 16,522
Net Cash From Operating Activities                   76,662 63,151 75,589
CASH FLOW USED IN INVESTING ACTIVITIES                        
Net Cash Used In Investing Activities                   (122,497) (118,159) (162,945)
CASH FLOW USED IN FINANCING ACTIVITIES                        
Repayment of subordinated debt $ (40,000)                 (40,000) 0 0
Dividends paid                   (21,600) (20,045) (19,327)
Proceeds from issuance of common stock                   0 13 70
Share based compensation withholding obligation                   (1,215) (1,051) (650)
Repurchase of common stock                   (12,433) 0 (5,157)
Net Cash From Financing Activities                   64,340 5,109 182,766
Net Increase (Decrease) in Cash and Cash Equivalents                   18,505 (49,899) 95,410
Cash and Cash Equivalents at Beginning of Year         119,882         119,882    
Cash and Cash Equivalents at End of Year   138,387       119,882       138,387 119,882  
Parent Company                        
Statement of Cash Flows [Abstract]                        
Net income                   68,541 66,790 59,067
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH FROM OPERATING ACTIVITIES                        
Deferred income tax expense (benefit)                   13 72 (56)
Share based compensation                   66 61 91
Accretion of discount on subordinated debt and debentures                   482 144 145
(Increase) decrease in accrued income and other assets                   (16,255) (4,483) 1,857
Increase (decrease) in accrued expenses and other liabilities                   12,334 5,334 (2,862)
Equity in undistributed net income of subsidiaries                   4,354 (45,724) (39,299)
Total Adjustments                   994 (44,596) (40,124)
Net Cash From Operating Activities                   69,535 22,194 18,943
CASH FLOW USED IN INVESTING ACTIVITIES                        
Purchases of interest bearing deposits - time                   (115,000) (145,000) (80,000)
Maturity of interest bearing deposits - time                   155,000 145,000 80,000
Net Cash Used In Investing Activities                   40,000 0 0
CASH FLOW USED IN FINANCING ACTIVITIES                        
Repayment of subordinated debt                   (40,000) 0 0
Dividends paid                   (21,600) (20,045) (19,327)
Proceeds from issuance of common stock                   2,543 2,284 2,208
Share based compensation withholding obligation                   (1,215) (1,051) (650)
Repurchase of common stock                   (12,433) 0 (5,157)
Net Cash From Financing Activities                   (72,705) (18,812) (22,926)
Net Increase (Decrease) in Cash and Cash Equivalents                   36,830 3,382 (3,983)
Cash and Cash Equivalents at Beginning of Year         $ 9,901       $ 6,519 9,901 6,519 10,502
Cash and Cash Equivalents at End of Year   $ 46,731       $ 9,901       $ 46,731 $ 9,901 $ 6,519