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Regulatory Capital (Tables)
 12 Months Ended
Dec. 31, 2024
Banking And Thrift Disclosure [Abstract]  
Schedule of Required Regulatory Capital
At December 31, 2024 and 2023, the Company and Seacoast Bank, its wholly-owned banking subsidiary, were both considered “well-capitalized” based on the applicable U.S. regulatory capital ratio requirements as reflected in the table below:
   Minimum to meet
 “Well Capitalized” Requirements
Minimum for Capital Adequacy
Purpose1
(Dollars in thousands)AmountRatioAmountRatioAmountRatio
Seacoast Banking Corporation of Florida    
(Consolidated)    
At December 31, 2024:    
Total Risk-Based Capital Ratio$1,785,247 16.18 %N/AN/A$882,582 ≥8.00 %
Tier 1 Capital Ratio 1,633,819 14.81 N/AN/A661,937 ≥6.00 
Common Equity Tier 1 Capital Ratio1,561,325 14.15 N/AN/A496,453 ≥4.50 
Leverage Ratio1,633,819 11.19 N/AN/A584,274 ≥4.00 
At December 31, 2023:
Total Risk-Based Capital Ratio$1,713,797 15.92 %N/AN/A$861,355 ≥8.00 %
Tier 1 Capital Ratio1,565,710 14.54 N/AN/A646,017 ≥6.00 
Common Equity Tier 1 Capital Ratio1,493,499 13.87 N/AN/A484,512 ≥4.50 
Leverage Ratio1,565,710 11.00 N/AN/A569,317 ≥4.00 
Seacoast National Bank
(A Wholly Owned Bank Subsidiary)
At December 31, 2024:
Total Risk-Based Capital Ratio$1,685,451 15.30 %$1,101,383 ≥10.00 %$881,106 ≥8.00 %
Tier 1 Capital Ratio1,555,986 14.13 881,106 ≥8.00 660,830 ≥6.00 
Common Equity Tier 1 Capital Ratio1,555,980 14.13 715,899 ≥6.50 495,622 ≥4.50 
Leverage Ratio1,555,986 10.66 729,699 ≥5.00 583,760 ≥4.00 
At December 31, 2023:
Total Risk-Based Capital Ratio$1,593,431 14.82 %$1,075,494 ≥10.00 %$860,395 ≥8.00 %
Tier 1 Capital Ratio1,466,878 13.64 860,395 ≥8.00 645,296 ≥6.00 
Common Equity Tier 1 Capital Ratio1,466,874 13.64 699,071 ≥6.50 483,972 ≥4.50 
Leverage Ratio1,466,878 10.32 711,039 ≥5.00 568,831 ≥4.00 
1Excludes the Basel III capital conservation buffer of 2.5%, which if not exceeded may constrain dividends, equity repurchases and compensation.
N/A - not applicable.