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Income Taxes - Unrecognized Tax Benefits (Details) - First Midwest - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of period $ 9,955 $ 11,007 $ 0
Additions for acquired uncertain tax positions 0 0 14,897
Additions based on tax positions related to prior years 0 60 0
Reductions for tax positions relating to prior years 0 0 (2,751)
Reductions due to statute of limitations expiring (2,961) (1,112) (1,139)
Balance at end of period $ 6,994 $ 9,955 $ 11,007