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GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Finite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Goodwill [Roll Forward]      
Goodwill, beginning of period $ 373,121 $ 373,121  
Goodwill, end of period 373,121 373,121  
Finite-lived Intangible Assets [Roll Forward]      
Intangible Assets, Net (Including Goodwill) 377,358 378,805 $ 382,561
Amortization (1,447) (3,756)  
Core Deposit Intangibles [Member]      
Finite-lived Intangible Assets [Roll Forward]      
Finite-Lived Intangible Assets, Net 4,237 5,684 $ 9,440
Amortization $ (1,447) $ (3,756)