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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in Carrying Amount of Goodwill
The following table presents the changes in the carrying amount of goodwill:
Years Ended December 31,
(dollars in thousands)202520242023
Balance at beginning of period$2,175,251 $1,998,716 $1,998,716 
Acquisitions and adjustments250,449 176,535 — 
Balance at end of period$2,425,700 $2,175,251 $1,998,716 
Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets
The gross carrying amounts and accumulated amortization of other intangible assets were as follows:
(dollars in thousands)Gross
Carrying
Amount		Accumulated
Amortization
and Impairment		Net
Carrying
Amount
December 31, 2025
Core deposit$586,735 $(166,160)$420,575 
Customer trust relationships93,892 (32,181)61,711 
Total intangible assets$680,627 $(198,341)$482,286 
December 31, 2024
Core deposit$189,636 $(95,950)$93,686 
Customer trust relationships50,892 (23,731)27,161 
Total intangible assets$240,528 $(119,681)$120,847 
Schedule of Estimated Amortization Expense for Future Years
Estimated amortization expense for future years is as follows:
(dollars in thousands)
2026$96,109 
202784,810 
202873,689 
202962,983 
203052,287 
Thereafter112,408 
Total$482,286