v3.26.1
GOODWILL (Tables)
3 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
Changes in the carrying amount of goodwill for the three months ended March 31, 2026 and March 31, 2025 were as follows:
Three months ended
March 31,
(Dollars in thousands)20262025
Balance at beginning of period$1,099,524 $1,007,656 
Goodwill resulting from business combinations19 
Balance at end of period$1,099,543 $1,007,656 
Finite-Lived Intangible Assets [Line Items]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
(Dollars in thousands)March 31, 2026December 31, 2025
Gross
carrying
amount
Accumulated
amortization
Gross
carrying
amount
Accumulated
amortization
Core deposit intangibles$121,806 $(41,428)$88,814 $(36,777)
Customer lists72,278 (34,703)72,278 (33,127)
Other9,269 (3,711)9,269 (3,654)
Mortgage servicing rights34,241 (11,825)33,013 (10,984)
Total$237,594 $(91,667)$203,374 $(84,542)