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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 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:
Three Months Ended
March 31,
(dollars in thousands)20252024
Balance at beginning of period$2,175,251 $1,998,716 
Acquisitions and adjustments— — 
Balance at end of period$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
March 31, 2025   
Core deposit$189,636 $(101,756)$87,880 
Customer trust relationships50,892 (24,755)26,137 
Total other intangible assets$240,528 $(126,511)$114,017 
December 31, 2024
Core deposit$189,636 $(95,950)$93,686 
Customer trust relationships50,892 (23,731)27,161 
Total other 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) 
2025 remaining$19,286 
202622,474 
202718,947 
202815,598 
202912,663 
Thereafter25,049 
Total$114,017