Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the change in the balance of goodwill for the periods indicated below:

	September 30,		September 30,
(Dollars in thousands)	2022		2021
Beginning balance	$	901,312	$	898,569
Purchase accounting adjustments	—		2,743
Ending balance	$	901,312	$	901,312
Accumulated impairment losses at end of period	$	—	$	—

Schedule of Finite-lived Intangible Assets

The following table summarizes the change in the balance of core deposit intangibles and customer relationship intangibles, and the related accumulated amortization for the periods indicated below:

	Three Months Ended						Nine Months Ended
	September 30,		June 30,		September 30,		September 30,		September 30,
(Dollars in thousands)	2022		2022		2021		2022		2021
Gross amount of intangible assets:
Beginning balance	$	145,212	$	145,212	$	145,212	$	145,212	$	145,212
Additions due to acquisitions	—		—		—		—		—
Ending balance	145,212		145,212		145,212		145,212		145,212
Accumulated amortization:
Beginning balance	(82,712)		(79,234)		(67,849)		(75,641)		(59,705)
Amortization	(3,472)		(3,478)		(3,912)		(10,543)		(12,056)
Ending balance	(86,184)		(82,712)		(71,761)		(86,184)		(71,761)
Net intangible assets	$	59,028	$	62,500	$	73,451	$	59,028	$	73,451