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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2022
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)202220212020
Balance at beginning of period$1,036,994 $1,036,994 $1,036,994 
Acquisitions and adjustments961,722 — — 
Balance at end of period$1,998,716 $1,036,994 $1,036,994 
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, 2022
Core deposit$170,642 $(80,951)$89,691 
Customer trust relationships56,243 (19,529)36,714 
Total intangible assets$226,885 $(100,480)$126,405 
December 31, 2021
Core deposit$92,754 $(60,036)$32,718 
Customer trust relationships16,547 (14,587)1,960 
Total intangible assets$109,301 $(74,623)$34,678 
Schedule of Estimated Amortization Expense for Future Years
Estimated amortization expense for future years is as follows:
(dollars in thousands)
2023$24,214 
202421,298 
202518,417 
202615,614 
202712,926 
Thereafter33,936 
Total$126,405