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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2023
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)20232022
Balance at beginning of period$1,998,716 $1,036,994 
Acquisitions and adjustments— 960,163 
Balance at end of period$1,998,716 $1,997,157 
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, 2023   
Core deposit$170,642 $(85,861)$84,781 
Customer trust relationships56,243 (20,805)35,438 
Total other intangible assets$226,885 $(106,666)$120,219 
December 31, 2022
Core deposit$170,642 $(80,951)$89,691 
Customer trust relationships56,243 (19,529)36,714 
Total other intangible assets$226,885 $(100,480)$126,405 
Schedule of Estimated Amortization Expense for Future Years
Estimated amortization expense for future years is as follows:
(dollars in thousands) 
2023 remaining$17,969 
202421,239 
202518,358 
202615,555 
202712,867 
Thereafter34,231 
Total$120,219