Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 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:

	Three Months Ended March 31,
(dollars in thousands)	2022		2021
Balance at beginning of period	$	1,036,994	$	1,036,994
Acquisitions and adjustments	960,163		—
Balance at end of period	$	1,997,157	$	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
March 31, 2022
Core deposit	$	170,642	$	(64,042)	$	106,600
Customer trust relationships	56,243		(15,391)		40,852
Total intangible assets	$	226,885	$	(79,433)	$	147,452
December 31, 2021
Core deposit	$	92,754	$	(60,036)	$	32,718
Customer trust relationships	16,547		(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)
2022 remaining	$	20,790
2023	24,471
2024	21,298
2025	18,417
2026	15,614
Thereafter	46,862
Total	$	147,452