Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill And Intangible Assets Disclosure [Abstract]

Carrying Value of Intangible Assets Subject to Amortization

Identifiable intangible assets with finite lives are amortized over the periods benefited and are evaluated for impairment similar to other long-lived assets. The purchase and carrying values of intangible assets subject to amortization at December 31, 2022 and 2021 were as follows:

	December 31, 2022
	Purchase		Accumulated		Carrying
($ in thousands)	Value		Amortization		Value
Core deposit intangibles	$	235,845	$	200,045	$	35,800
Credit card and trust relationships		49,962		29,569		20,393
	$	285,807	$	229,614	$	56,193

	December 31, 2021
	Purchase		Accumulated		Carrying
($ in thousands)	Value		Amortization		Value
Core deposit intangibles	$	235,845	$	188,135	$	47,710
Credit card and trust relationships		49,962		27,446		22,516
	$	285,807	$	215,581	$	70,226

Aggregate Amortization Expense

Aggregate amortization expense by category of finite lived intangible assets for the years ended December 31, 2022, 2021, and 2020 are as follows:

	Years Ended December 31,
($ in thousands)	2022		2021		2020
Core deposit intangibles	$	11,909	$	14,304	$	16,864
Credit card and trust relationships		2,124		2,361		2,637
Merchant processing relationships		—		—		415
	$	14,033	$	16,665	$	19,916

Estimated Amortization Expense of Other Intangible Assets

The following table shows estimated amortization expense of other intangible assets at December 31, 2022 for the five succeeding years and all years thereafter, calculated based on current amortization schedules.

($ in thousands)
2023	$	11,557
2024		9,413
2025		7,985
2026		5,322
2027		3,682
Thereafter		18,234
	$	56,193