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GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL (Tables)
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
Changes in the carrying amount of goodwill for the years ended December 31, 2024, 2023 and 2022 are shown below.
(Dollars in thousands)202420232022
Balance at beginning of year$1,005,868 $1,001,507 $1,000,749 
Goodwill resulting from business combinations1,788 4,361 758 
Balance at end of year$1,007,656 $1,005,868 $1,001,507 
Schedule of Finite-Lived Intangible Assets
The gross carrying amount and accumulated amortization of other intangible assets were as follows:
December 31, 2024December 31, 2023
(Dollars in thousands)Gross
carrying
amount		Accumulated
amortization		Gross
carrying
amount		Accumulated
amortization
Amortized intangible assets
Core deposit intangibles$41,750 $(32,302)$41,750 $(29,395)
Customer list72,278 (26,822)69,563 (20,553)
Other9,381 (3,416)10,960 (5,477)
Mortgage servicing rights27,217(8,795)23,791(6,690)
Total$150,626 $(71,335)$146,064 $(62,115)
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The estimated amortization expense of intangible assets for the next five years is as follows:
(Dollars in thousands)Intangible amortization
2025$9,562 
20269,330 
20279,260 
20287,051 
20296,304