Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents changes in the carrying value of goodwill for the years ended December 31:

(Dollars in thousands)	2022		2021
Balance, beginning of year	$	901,312	$	898,569
Purchase accounting adjustments	—		2,743
Balance, end of year	$	901,312	$	901,312
Accumulated impairment losses at end of year	$	—	$	—

Schedule of Finite-lived Intangible Assets

The following table summarizes the changes in the balances of core deposit and customer relationship intangible assets, and the related accumulated amortization for the years ended December 31:

(Dollars in thousands)	2022		2021		2020
Gross balance of intangible assets:
Balance, beginning of year	$	145,212	$	145,212	$	125,945
Additions due to acquisitions	—		—		19,267
Balance, end of year	145,212		145,212		145,212
Accumulated amortization:
Balance, beginning of year	(75,641)		(59,705)		(42,633)
Amortization	(13,983)		(15,936)		(17,072)
Balance, end of year	(89,624)		(75,641)		(59,705)
Net intangible assets, end of year	$	55,588	$	69,571	$	85,507