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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The following table presents the components of income tax provision for the years ended December 31, 2024, 2023, and 2022:

(in thousands)			2024						2023						2022
Current Expense:
Federal			$	114,932					$	72,224					$	70,982
State			39,304						37,365						28,461
Total current tax expense			$	154,236					$	109,589					$	99,443
Deferred tax expense:
Federal			$	21,284					$	6,794					$	11,636
State			9,555						6,101						2,747
Total deferred tax expense			30,839						12,895						14,383
Total			$	185,075					$	122,484					$	113,826

Schedule of Effective Income Tax Rate Reconciliation

The following table presents a reconciliation of income taxes computed at the federal statutory rate to the actual effective rate for the years ended December 31, 2024, 2023, and 2022:

(in thousands)			2024						2023						2022
Statutory federal income tax rate			21.0		%				21.0		%				21.0		%
State tax, net of federal benefit			5.8		%				6.2		%				5.8		%
Non-deductible FDIC premiums			1.0		%				1.7		%				0.4		%
Net tax-exempt interest income			(1.2)		%				(2.2)		%				(1.5)		%
Other			(0.9)		%				(0.7)		%				(0.4)		%
Effective income tax rate			25.7		%				26.0		%				25.3		%

Schedule of Deferred Tax Assets and Liabilities

The following table reflects the effects of temporary differences that give rise to the components of the net deferred tax asset as of December 31, 2024 and 2023:

(in thousands)			2024						2023
Deferred tax assets:
Net unrealized losses on investment securities			$	317,213					$	303,465
Acquired loans			116,099						146,315
Allowance for credit losses			111,357						115,777
Accrued severance and deferred compensation			36,243						39,904
Other			79,947						88,137
Total gross deferred tax assets			660,859						693,598
Deferred tax liabilities:
Other intangible assets			125,297						155,642
Direct financing leases			36,416						42,825
Deferred loan fees and costs			33,630						34,402
Operating lease right-of-use asset			28,922						30,117
Residential mortgage servicing rights			28,736						31,259
Premises and equipment			19,153						20,579
Other			29,280						31,571
Total gross deferred tax liabilities			301,434						346,395
Net deferred tax assets			$	359,425					$	347,203

Affordable Housing Tax Credit Investments, Other Tax Credit Investments, and Related Unfunded Commitments [Table Text Block]

The following table presents the Company's tax credit investments, which consisted entirely of affordable housing tax credit investments and related unfunded capital commitments as of December 31, 2024 and 2023:

(in thousands)			December 31, 2024						December 31, 2023
Other Assets:
Affordable housing tax credit investments			$	220,954					$	210,873
Other Liabilities:
Unfunded affordable housing tax credit commitments			$	95,280					$	114,082

Affordable Housing Tax Credit Investments [Table Text Block]

The following table presents other information relating to the Company's affordable housing tax credit investments for the years ended December 31, 2024, 2023, and 2022:

(in thousands)			2024						2023						2022
Proportional amortization			$	19,778					$	16,777					$	12,026
Tax credit investment credits and tax benefits			$	25,067					$	20,932					$	14,553

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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