Old National Bancorp (ONB) 10-Q 1 Nov 23 2023 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2023	Oct. 31, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-15817
Entity Registrant Name	Old National Bancorp
Entity Incorporation, State or Country Code	IN
Entity Tax Identification Number	35-1539838
Entity Address, Address Line One	One Main Street
Entity Address, City or Town	Evansville,
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	47708
City Area Code	(800)
Local Phone Number	731-2265
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		292,621,000
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000707179
Current Fiscal Year End Date	--12-31
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common stock, no par value
Trading Symbol	ONB
Security Exchange Name	NASDAQ
Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series A
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	ONBPP
Security Exchange Name	NASDAQ
Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series C
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol	ONBPO
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 381,343	$ 453,432
Money market and other interest-earning investments	1,282,087	274,980
Total cash and cash equivalents	1,663,430	728,412
Equity securities, at fair value	69,880	52,507
Investment securities - available-for-sale, at fair value (amortized cost $7,719,944 and $7,772,603, respectively)	6,414,761	6,773,712
Investment securities - held-to-maturity, at amortized cost (fair value $2,393,621 and $2,643,682, respectively)	3,027,914	3,089,147
Federal Home Loan Bank/Federal Reserve Bank stock, at cost	365,588	314,168
Loans held-for-sale, at fair value	122,033	11,926
Loans:
Total loans	32,577,834	31,123,641
Allowance for credit losses on loans	(303,982)	(303,671)
Net loans	32,273,852	30,819,970
Premises and equipment, net	565,607	557,307
Operating lease right-of-use assets	179,284	189,714
Accrued interest receivable	209,503	190,521
Goodwill	1,998,716	1,998,716
Other intangible assets	108,119	126,405
Company-owned life insurance	774,517	768,552
Other assets	1,286,244	1,142,315
Total assets	49,059,448	46,763,372
Deposits:
Noninterest-bearing demand	10,091,352	11,930,798
Interest-bearing:
Checking and NOW	7,495,417	8,340,955
Savings	5,296,985	6,326,158
Money market	8,793,218	5,389,139
Time deposits	5,575,704	3,013,780
Total deposits	37,252,676	35,000,830
Federal funds purchased and interbank borrowings	918	581,489
Securities sold under agreements to repurchase	279,061	432,804
Federal Home Loan Bank advances	4,412,576	3,829,018
Other borrowings	863,455	743,003
Operating lease liabilities	199,937	211,964
Accrued expenses and other liabilities	811,288	835,669
Total liabilities	43,819,911	41,634,777
Shareholders’ Equity
Preferred stock, 2,000 shares authorized, 231 shares issued and outstanding	230,500	230,500
Common stock, no par value, $1.00 per share stated value, 600,000 shares authorized,    292,586 and 292,903 shares issued and outstanding, respectively	292,586	292,903
Capital surplus	4,153,977	4,174,265
Retained earnings	1,531,289	1,217,349
Accumulated other comprehensive income (loss), net of tax	(968,815)	(786,422)
Total shareholders’ equity	5,239,537	5,128,595
Total liabilities and shareholders’ equity	49,059,448	46,763,372
Commercial
Loans:
Total loans	9,333,448	9,508,904
Allowance for credit losses on loans	(124,755)	(120,612)
Commercial real estate
Loans:
Total loans	13,916,221	12,457,070
Allowance for credit losses on loans	(144,975)	(138,244)
Residential real estate
Loans:
Total loans	6,696,288	6,460,441
Allowance for credit losses on loans	(20,780)	(21,916)
Consumer credit, net of unearned income
Loans:
Total loans	$ 2,631,877	$ 2,697,226

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Investment securities-available-for-sale, fair value	$ 7,719,944	$ 7,772,603
Investment securities - held-to-maturity, fair value	$ 2,393,621	$ 2,643,682
Preferred stock, shares authorized (in shares)	2,000	2,000
Preferred stock, shares issued (in shares)	231	231
Preferred stock, shares outstanding (in shares)	231	231
Common stock, stated value (in dollars per share)	$ 1	$ 1
Authorized and unissued common shares reserved for issuance (in shares)	600,000	600,000
Common stock, shares issued (in shares)	292,586	292,903
Common stock, shares outstanding (in shares)	292,586	292,903

Consolidated Statements of Inco

Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Loans including fees:
Taxable	$ 474,387	$ 331,271	$ 1,334,658	$ 800,535
Nontaxable	11,181	6,461	32,318	14,770
Investment securities:
Taxable	66,924	56,765	191,797	145,633
Nontaxable	10,833	11,086	33,039	32,370
Money market and other interest-earning investments	13,194	935	25,258	3,073
Total interest income	576,519	406,518	1,617,070	996,381
Interest Expense
Deposits	147,428	10,820	310,995	19,201
Federal funds purchased and interbank borrowings	910	720	11,404	722
Securities sold under agreements to repurchase	710	106	2,389	287
Federal Home Loan Bank advances	40,382	13,027	123,466	25,915
Other borrowings	12,003	5,256	30,071	13,410
Total interest expense	201,433	29,929	478,325	59,535
Net interest income	375,086	376,589	1,138,745	936,846
Provision for credit losses	19,068	15,490	47,292	133,391
Net interest income after provision for credit losses	356,018	361,099	1,091,453	803,455
Noninterest Income
Wealth and investment services fees	26,687	25,359	80,128	75,183
Service charges on deposit accounts	18,524	20,042	53,278	54,392
Debit card and ATM fees	10,818	10,608	31,453	29,429
Mortgage banking revenue	5,063	5,360	12,628	19,127
Capital markets income	5,891	8,906	19,003	20,609
Company-owned life insurance	3,740	3,361	11,624	11,456
Debt securities gains (losses), net	(241)	(172)	(5,440)	85
Other income	10,456	6,921	30,574	24,461
Total noninterest income	80,938	80,385	233,248	234,742
Noninterest Expense
Salaries and employee benefits	131,541	147,203	404,715	433,167
Occupancy	25,795	26,418	80,162	73,933
Equipment	8,284	7,328	23,394	20,046
Marketing	9,448	10,361	28,698	23,756
Technology	20,592	20,269	59,850	64,914
Communication	4,075	5,392	12,768	14,687
Professional fees	5,956	6,559	19,085	32,686
FDIC assessment	9,000	6,249	29,028	13,523
Amortization of intangibles	6,040	7,089	18,286	19,070
Amortization of tax credit investments	2,644	2,662	8,167	5,703
Property optimization	0	0	1,559	0
Other expense	21,401	22,914	56,359	54,023
Total noninterest expense	244,776	262,444	742,071	755,508
Income before income taxes	192,180	179,040	582,630	282,689
Income tax expense	44,304	38,887	133,118	55,137
Net income	147,876	140,153	449,512	227,552
Preferred dividends	(4,034)	(4,034)	(12,101)	(10,084)
Net income applicable to common shareholders	$ 143,842	$ 136,119	$ 437,411	$ 217,468
Net income per common share - basic (in dollars per share)	$ 0.49	$ 0.47	$ 1.50	$ 0.81
Net income per common share - diluted (in dollars per share)	$ 0.49	$ 0.47	$ 1.50	$ 0.80
Weighted average number of common shares outstanding - basic (in shares)	290,648	290,961	290,763	269,843
Weighted average number of common shares outstanding - diluted (in shares)	291,717	292,483	291,809	271,123
Dividends per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.42	$ 0.42

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 147,876	$ 140,153	$ 449,512	$ 227,552
Change in debt securities available-for-sale:
Unrealized holding gains (losses) for the period	(208,626)	(285,798)	(304,061)	(1,019,782)
Reclassification for securities transferred to held-to-maturity	0	0	0	165,473
Reclassification adjustment for securities (gains) losses realized in income	241	172	5,440	(85)
Income tax effect	51,903	68,356	83,092	202,999
Unrealized gains (losses) on available-for-sale securities	(156,482)	(217,270)	(215,529)	(651,395)
Change in securities held-to-maturity:
Adjustment for securities transferred from available-for-sale	0	0	0	(165,473)
Amortization of unrealized losses on securities transferred     from available-for-sale	5,623	6,772	16,574	10,774
Income tax effect	(1,430)	(1,651)	(2,861)	37,621
Changes from securities held-to-maturity	4,193	5,121	13,713	(117,078)
Change in hedges:
Net unrealized derivative gains (losses) on hedges	(15,574)	(36,755)	45,547	(49,679)
Reclassification adjustment for (gains) losses realized in net income	4,927	749	(19,893)	(139)
Income tax effect	2,754	8,846	(6,094)	12,240
Changes from hedges	(7,893)	(27,160)	19,560	(37,578)
Change in defined benefit pension plans:
Amortization of net (gains) losses recognized in income	0	(11)	(182)	(32)
Income tax effect	0	3	45	8
Changes from defined benefit pension plans	0	(8)	(137)	(24)
Other comprehensive income (loss), net of tax	(160,182)	(239,317)	(182,393)	(806,075)
Comprehensive income (loss)	$ (12,306)	$ (99,164)	$ 267,119	$ (578,523)

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period at Dec. 31, 2021	$ 3,012,018	$ 0	$ 165,838	$ 1,880,545	$ 968,010	$ (2,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(27,586)				(27,586)
Other comprehensive income (loss)	(335,824)					(335,824)
First Midwest Bancorp, Inc. merger:
Issuance of common stock	2,446,312		129,365	2,316,947
Issuance of preferred stock, net of issuance costs	243,719	230,500		13,219
Cash dividends:
Common	(40,782)				(40,782)
Preferred dividends	(2,017)				(2,017)
Common stock issued	165		10	155
Common stock repurchased	(70,078)		(3,890)	(66,188)
Share-based compensation expense	6,284			6,284
Stock activity under incentive compensation plans	(97)		1,636	(1,368)	(365)
Balance at end of period at Mar. 31, 2022	5,232,114	230,500	292,959	4,149,594	897,260	(338,199)
Balance at beginning of period at Dec. 31, 2021	3,012,018	0	165,838	1,880,545	968,010	(2,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	227,552
Other comprehensive income (loss)	(806,075)
First Midwest Bancorp, Inc. merger:
Issuance of common stock	2,446,312	243,870
Balance at end of period at Sep. 30, 2022	4,943,383	230,500	292,880	4,166,583	1,061,870	(808,450)
Balance at beginning of period at Mar. 31, 2022	5,232,114	230,500	292,959	4,149,594	897,260	(338,199)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	114,985				114,985
Other comprehensive income (loss)	(230,934)					(230,934)
Cash dividends:
Common	(40,901)				(40,901)
Preferred dividends	(4,033)				(4,033)
Common stock issued	162		10	152
Common stock repurchased	(322)		(21)	(301)
Share-based compensation expense	7,813			7,813
Stock activity under incentive compensation plans	(101)		(55)	285	(331)
Balance at end of period at Jun. 30, 2022	5,078,783	230,500	292,893	4,157,543	966,980	(569,133)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	140,153				140,153
Other comprehensive income (loss)	(239,317)					(239,317)
Cash dividends:
Common	(40,907)				(40,907)
Preferred dividends	(4,034)				(4,034)
Common stock issued	230		17	213
Common stock repurchased	(531)		(34)	(497)
Share-based compensation expense	7,485			7,485
Stock activity under incentive compensation plans	1,521		4	1,839	(322)
Balance at end of period at Sep. 30, 2022	4,943,383	230,500	292,880	4,166,583	1,061,870	(808,450)
Balance at beginning of period at Dec. 31, 2022	5,128,595	230,500	292,903	4,174,265	1,217,349	(786,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	146,600				146,600
Other comprehensive income (loss)	78,064					78,064
Cash dividends:
Common	(41,088)				(41,088)
Preferred dividends	(4,034)				(4,034)
Common stock issued	262		15	247
Common stock repurchased	(43,710)		(2,598)	(41,112)
Share-based compensation expense	12,742			12,742
Stock activity under incentive compensation plans	(5)		1,602	(1,412)	(195)
Balance at end of period at Mar. 31, 2023	5,277,426	230,500	291,922	4,144,730	1,318,632	(708,358)
Balance at beginning of period at Dec. 31, 2022	5,128,595	230,500	292,903	4,174,265	1,217,349	(786,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	449,512
Other comprehensive income (loss)	(182,393)
First Midwest Bancorp, Inc. merger:
Issuance of common stock	0	0
Balance at end of period at Sep. 30, 2023	5,239,537	230,500	292,586	4,153,977	1,531,289	(968,815)
Balance at beginning of period at Mar. 31, 2023	5,277,426	230,500	291,922	4,144,730	1,318,632	(708,358)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	155,036				155,036
Other comprehensive income (loss)	(100,275)					(100,275)
Cash dividends:
Common	(40,932)				(40,932)
Preferred dividends	(4,033)				(4,033)
Common stock issued	272		20	252
Common stock repurchased	(105)		(8)	(97)
Share-based compensation expense	5,247			5,247
Stock activity under incentive compensation plans	(541)		663	(1,043)	(161)
Balance at end of period at Jun. 30, 2023	5,292,095	230,500	292,597	4,149,089	1,428,542	(808,633)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	147,876				147,876
Other comprehensive income (loss)	(160,182)					(160,182)
Cash dividends:
Common	(40,933)				(40,933)
Preferred dividends	(4,034)				(4,034)
Common stock issued	263		20	243
Common stock repurchased	(451)		(31)	(420)
Share-based compensation expense	4,914			4,914
Stock activity under incentive compensation plans	(11)		0	151	(162)
Balance at end of period at Sep. 30, 2023	$ 5,239,537	$ 230,500	$ 292,586	$ 4,153,977	$ 1,531,289	$ (968,815)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Dividends per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.14	$ 0.14	$ 0.14	$ 0.14	$ 0.42	$ 0.42

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows From Operating Activities
Net income	$ 449,512	$ 227,552
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	28,162	26,893
Amortization of other intangible assets	18,286	19,070
Amortization of tax credit investments	8,167	5,703
Net premium amortization on investment securities	8,673	14,625
Accretion income related to acquired loans	(17,484)	(63,472)
Share-based compensation expense	22,903	21,582
Provision for credit losses	47,292	133,391
Debt securities (gains) losses, net	5,440	(85)
Net (gains) losses on sales of loans and other assets	(727)	(5,911)
Increase in cash surrender value of company-owned life insurance	(11,624)	(11,456)
Residential real estate loans originated for sale	(366,340)	(490,288)
Proceeds from sales of residential real estate loans	366,485	531,121
(Increase) decrease in interest receivable	(18,982)	(29,088)
(Increase) decrease in other assets	(56,116)	36,049
Increase (decrease) in accrued expenses and other liabilities	(40,132)	271,625
Net cash flows provided by (used in) operating activities	443,515	687,311
Cash Flows From Investing Activities
Cash received from merger, net	0	1,912,629
Purchases of investment securities available-for-sale	(626,820)	(1,367,896)
Purchases of investment securities held-to-maturity	(1,941)	(156,378)
Purchases of Federal Home Loan Bank/Federal Reserve Bank stock	(99,158)	(115,488)
Purchases of equity securities	(20,862)	(5,843)
Proceeds from maturities, prepayments, and calls of investment securities available-for-sale	614,782	1,117,620
Proceeds from sales of investment securities available-for-sale	54,056	13,371
Proceeds from maturities, prepayments, and calls of investment securities held-to-maturity	76,276	61,172
Proceeds from sales of Federal Home Loan Bank/Federal Reserve Bank stock	47,738	108,697
Proceeds from sales of equity securities	2,610	52,034
Loan originations and payments, net	(2,269,544)	(2,481,620)
Proceeds from sales of commercial loans	679,952	0
Proceeds from company-owned life insurance death benefits	5,865	8,716
Proceeds from sales of premises and equipment and other assets	3,513	3,202
Purchases of premises and equipment and other assets	(28,074)	(28,739)
Net cash flows provided by (used in) investing activities	(1,561,607)	(878,523)
Net increase (decrease) in:
Deposits	2,251,846	235,064
Federal funds purchased and interbank borrowings	(580,571)	300,755
Securities sold under agreements to repurchase	(153,743)	(89,416)
Other borrowings	114,251	152,324
Payments for maturities of Federal Home Loan Bank advances	(1,850,150)	(1,674,875)
Proceeds from Federal Home Loan Bank advances	2,450,000	1,450,000
Cash dividends paid	(135,054)	(132,674)
Common stock repurchased	(44,266)	(70,931)
Common stock issued	797	557
Net cash flows provided by (used in) financing activities	2,053,110	170,804
Net increase (decrease) in cash and cash equivalents	935,018	(20,408)
Cash and cash equivalents at beginning of period	728,412	822,019
Cash and cash equivalents at end of period	1,663,430	801,611
Supplemental cash flow information:
Total interest paid	450,939	62,207
Total income taxes paid (net of refunds)	158,478	14,759
Issuance of common stock	0	2,446,312
Investment securities purchased but not settled	0	3,858
Securities transferred from available-for-sale to held-to-maturity	0	2,986,736
Operating lease right-of-use assets obtained in exchange for lease obligations	7,899	17,376
Finance lease right-of-use assets obtained in exchange for lease obligations	10,019	629
Preferred Stock
Supplemental cash flow information:
Issuance of common stock	$ 0	$ 243,870

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements include the accounts of Old National Bancorp and its wholly-owned subsidiaries (hereinafter collectively referred to as “Old National”) and have been prepared in conformity with accounting principles generally accepted in the United States of America and prevailing practices within the banking industry. Such principles require management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and the disclosures of contingent assets and liabilities at the date of the financial statements and amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, the consolidated financial statements contain all the normal and recurring adjustments necessary for a fair statement of the financial position of Old National as of September 30, 2023 and December 31, 2022, and the results of its operations for the three and nine months ended September 30, 2023 and 2022. Interim results do not necessarily represent annual results. Certain information and disclosures normally included in notes to consolidated annual financial statements prepared in accordance with GAAP have been condensed or omitted in this Quarterly Report on Form 10-Q pursuant to SEC rules and regulations. These financial statements should be read in conjunction with Old National’s Annual Report on Form 10-K for the year ended December 31, 2022. All intercompany transactions and balances have been eliminated. Certain prior year amounts have been reclassified to conform to the current presentation. Such reclassifications had no effect on prior period net income or shareholders’ equity and were insignificant amounts. Financial Difficulty Modifications Any loans that are modified are reviewed by Old National to identify if a financial difficulty modification has occurred, which is when Old National Bank modifies a loan related to a borrower experiencing financial difficulties. Terms may be modified to fit the ability of the borrower to repay in line with its current financial status. The modification of the terms of such loans includes one or a combination of the following: a reduction of the stated interest rate of the loan, an extension of the maturity date, a permanent reduction of the recorded investment of the loan, or an other-than-insignificant payment delay. The adoption of ASU 2022-02 on January 1, 2023 eliminated the recognition and measurement of TDRs and enhanced disclosures for modifications to loans related to borrowers experiencing financial difficulties. See Note 2 to the consolidated financial statements for additional detail regarding the adoption of ASU 2022-02. Other than the changes for financial difficulty modifications, there have been no material changes from the significant accounting policies disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2023
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2023 FASB ASC 805 – In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities From Contracts With Customers , to address diversity in practice and inconsistency related to the accounting for revenue contracts with customers acquired in a business combination. The amendments require that the acquirer recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606. At the acquisition date, an acquirer should account for the related revenue contracts in accordance with Topic 606 as if it had originated the contracts. The ASU also provides certain practical expedients for acquirers when recognizing and measuring acquired contract assets and liabilities. The amendments in this update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. Entities should apply the amendments prospectively to business combinations that occur after the effective date. The adoption of this guidance on January 1, 2023 did not have a material impact on the consolidated financial statements. FASB ASC 815 – In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method , to expand the current single-layer method of electing hedge accounting to allow multiple hedged layers of a single closed portfolio under the method and rename the last-of-layer method the portfolio layer method. The amendments in this update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The adoption of this guidance on January 1, 2023 did not have a material impact on the consolidated financial statements. FASB ASC 326 – In March 2022, the FASB issued ASU 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures , to eliminate the TDR recognition and measurement guidance and, instead, require that an entity evaluate (consistent with the accounting for other loan modifications) whether the modification represents a new loan or a continuation of an existing loan. The amendments also enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. The amendments require that an entity disclose current-period gross charge-offs by year of origination for financing receivables and net investment in leases within the vintage disclosures required by ASC 326. The amendments in this update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Old National adopted the provision in ASU 2022-02 related to the recognition and measurement of TDRs on a prospective basis on January 1, 2023, which did not have a material impact on the consolidated financial statements. FASB ASC 848 – In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from LIBOR or other interbank offered rate on financial reporting. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. In December 2022, the FASB issued ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 , which defers the sunset date of relief provisions within Topic 848 from December 31, 2022 to December 31, 2024. The objective of the guidance in Topic 848 is to provide relief during the transition period. The amendments in this ASU are effective March 12, 2020 through December 31, 2024. Old National believes the adoption of this guidance on activities subsequent to September 30, 2023 will not have a material impact on the consolidated financial statements. Accounting Guidance Pending Adoption FASB ASC 820 – In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions , to clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Early adoption is permitted. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 842 – In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842): Common Control Arrangements , which requires all entities to amortize leasehold improvements associated with common control leases over the useful life to the common control group. This ASU is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been made available for issuance. If an entity adopts the amendments in an interim period, it must adopt them as of the beginning of the fiscal year that includes that interim period. Transition can be done either retrospectively or prospectively. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 323 – In March 2023, the FASB issued ASU 2023-02, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method , which allows reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. This ASU is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for all entities in any interim period. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements.

Acquisition and Divestiture Act

Acquisition and Divestiture Activity	9 Months Ended
	Sep. 30, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisition and Divestiture Activity	ACQUISITION AND DIVESTITURE ACTIVITY Merger First Midwest Bancorp, Inc. On February 15, 2022, Old National completed its previously announced merger of equals transaction with First Midwest pursuant to an agreement and plan of merger, dated as of May 30, 2021, to combine in an all-stock transaction. The combined organization has a presence in additional Midwestern markets, strong commercial banking capabilities, a robust retail footprint, a significant wealth management platform, and an enhanced ability to attract talent. The combined organization also creates the scale and profitability to accelerate digital and technology capabilities to drive future investments in consumer and commercial banking, as well as wealth management services. As of December 31, 2022, Old National finalized its valuation of all assets acquired and liabilities assumed. Transaction costs totaling $23.2 million associated with the merger have been expensed for the nine months ended September 30, 2023, compared to $100.6 million during the nine months ended September 30, 2022. Additional transaction and integration costs will be expensed in future periods as incurred. Divestiture On November 18, 2022, Old National completed its previously announced transaction with UMB, pursuant to which UMB acquired Old National’s business of acting as a qualified custodian for, and administering, health savings accounts. Old National served as custodian for health savings accounts comprised of both investment accounts and deposit accounts. At closing, the health savings accounts held in deposit accounts that were transferred totaled approximately $382 million and the transaction resulted in a $90.7 million pre-tax gain. Pending Acquisition CapStar Financial Holdings, Inc. On October 26, 2023, Old National announced that it entered into a definitive merger agreement pursuant to which Old National will acquire CapStar Financial Holdings, Inc. (“CapStar”) and its wholly-owned subsidiary, CapStar Bank, in an all-stock transaction. This partnership transaction will strengthen Old National’s recently formed Nashville presence and add several new high-growth markets. As of September 30, 2023, CapStar had approximately $3.3 billion of total assets, $2.3 billion of total loans, and $2.8 billion of deposits. Under the terms of the merger agreement, each outstanding share of CapStar common stock will be converted into the right to receive 1.155 shares of Old National common stock, valuing the transaction at approximately $344.4 million, or $16.64 per share, based on Old National’s 30-day volume weighted average closing stock price ending October 25, 2023. The transaction value is likely to change until closing due to fluctuations in the price of Old National common stock. The definitive merger agreement has been approved by the Board of Directors of each company. The transaction remains subject to regulatory approval and the approval of CapStar shareholders. The transaction is anticipated to close in the second quarter of 2024.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income Per Common Share	NET INCOME PER COMMON SHARE Basic and diluted net income per common share are calculated using the two-class method. Net income applicable to common shares is divided by the weighted-average number of common shares outstanding during the period. Adjustments to the weighted average number of common shares outstanding are made only when such adjustments will dilute net income per common share. Net income applicable to common shares is then divided by the weighted-average number of common shares and common share equivalents during the period. The following table presents the calculation of basic and diluted net income per common share: Three Months Ended Nine Months Ended (dollars and shares in thousands, except per share data) 2023 2022 2023 2022 Net income $ 147,876 $ 140,153 $ 449,512 $ 227,552 Preferred dividends (4,034) (4,034) (12,101) (10,084) Net income applicable to common shares $ 143,842 $ 136,119 $ 437,411 $ 217,468 Weighted average common shares outstanding: Weighted average common shares outstanding (basic) 290,648 290,961 290,763 269,843 Effect of dilutive securities: Restricted stock 1,069 1,516 1,045 1,273 Stock appreciation rights — 6 1 7 Weighted average diluted shares outstanding 291,717 292,483 291,809 271,123 Basic Net Income Per Common Share $ 0.49 $ 0.47 $ 1.50 $ 0.81 Diluted Net Income Per Common Share $ 0.49 $ 0.47 $ 1.50 $ 0.80

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The following table summarizes the amortized cost and fair value of the available-for-sale and held-to-maturity investment securities portfolios and the corresponding amounts of gross unrealized gains, unrealized losses, and basis adjustments in AOCI and gross unrecognized gains and losses. (dollars in thousands) Amortized Unrealized Unrealized Basis Adjustments (1) Fair September 30, 2023 Available-for-Sale U.S. Treasury $ 616,608 $ 98 $ (10,258) $ (58,322) $ 548,126 U.S. government-sponsored entities and agencies 1,475,307 — (229,113) (103,294) 1,142,900 Mortgage-backed securities - Agency 4,686,448 17 (823,760) — 3,862,705 States and political subdivisions 592,495 7 (47,058) (500) 544,944 Pooled trust preferred securities 13,794 — (2,669) — 11,125 Other securities 335,292 112 (30,443) — 304,961 Total available-for-sale securities $ 7,719,944 $ 234 $ (1,143,301) $ (162,116) $ 6,414,761 Held-to-Maturity U.S. government-sponsored entities and agencies $ 824,223 $ — $ (207,213) $ — $ 617,010 Mortgage-backed securities - Agency 1,043,585 — (195,933) — 847,652 States and political subdivisions 1,160,256 — (231,147) — 929,109 Allowance for securities held-to-maturity (150) — — — (150) Total held-to-maturity securities $ 3,027,914 $ — $ (634,293) $ — $ 2,393,621 December 31, 2022 Available-for-Sale U.S. Treasury $ 253,148 $ 5 $ (5,189) $ (47,037) $ 200,927 U.S. government-sponsored entities and agencies 1,451,736 — (169,248) (107,408) 1,175,080 Mortgage-backed securities - Agency 4,986,354 976 (617,428) — 4,369,902 States and political subdivisions 688,159 1,789 (26,096) — 663,852 Pooled trust preferred securities 13,783 — (2,972) — 10,811 Other securities 379,423 258 (26,541) — 353,140 Total available-for-sale securities $ 7,772,603 $ 3,028 $ (847,474) $ (154,445) $ 6,773,712 Held-to-Maturity U.S. government-sponsored entities and agencies $ 819,168 $ — $ (162,810) $ — $ 656,358 Mortgage-backed securities - Agency 1,106,817 — (123,854) — 982,963 States and political subdivisions 1,163,312 221 (159,022) — 1,004,511 Allowance for securities held-to-maturity (150) — — — (150) Total held-to-maturity securities $ 3,089,147 $ 221 $ (445,686) $ — $ 2,643,682 (1) Basis adjustments represent the cumulative amount of fair value hedging adjustments included in the carrying amounts of fixed-rate investment securities assets designated in fair value hedging arrangements. See Note 15 to the consolidated financial statements for additional information regarding these derivative financial instruments. Substantially all of the mortgage-backed securities in the investment portfolio are residential mortgage-backed securities. Proceeds from sales or calls of available-for-sale investment securities and the resulting realized gains and realized losses were as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Proceeds $ 28,531 $ 5,221 $ 111,419 $ 78,568 Realized gains 54 17 1,002 528 Realized losses (295) (189) (6,442) (443) The table below shows the amortized cost and fair value of the investment securities portfolio by contractual maturity. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Weighted average yield is based on amortized cost. September 30, 2023 (dollars in thousands) Amortized Fair Weighted Maturity Available-for-Sale Within one year $ 539,157 $ 535,193 4.71 % One to five years 1,567,565 1,395,867 2.80 Five to ten years 3,987,461 3,285,183 2.37 Beyond ten years 1,625,761 1,198,518 2.46 Total $ 7,719,944 $ 6,414,761 2.64 % Held-to-Maturity One to five years $ 161,837 $ 127,716 2.68 % Five to ten years 954,756 797,284 2.64 Beyond ten years 1,911,321 1,468,621 2.71 Total $ 3,027,914 $ 2,393,621 2.69 % The following table summarizes the available-for-sale investment securities with unrealized losses for which an allowance for credit losses has not been recorded by aggregated major security type and length of time in a continuous unrealized loss position: Less than 12 months 12 months or longer Total (dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Losses September 30, 2023 Available-for-Sale U.S. Treasury $ 37,492 $ (144) $ 178,540 $ (10,114) $ 216,032 $ (10,258) U.S. government-sponsored entities 32,821 (58) 1,110,079 (229,055) 1,142,900 (229,113) Mortgage-backed securities - Agency 124,895 (5,798) 3,736,306 (817,962) 3,861,201 (823,760) States and political subdivisions 258,362 (7,749) 260,563 (39,309) 518,925 (47,058) Pooled trust preferred securities — — 11,125 (2,669) 11,125 (2,669) Other securities 11,737 (323) 262,912 (30,120) 274,649 (30,443) Total available-for-sale $ 465,307 $ (14,072) $ 5,559,525 $ (1,129,229) $ 6,024,832 $ (1,143,301) December 31, 2022 Available-for-Sale U.S. Treasury $ 130,967 $ (3,264) $ 66,992 $ (1,925) $ 197,959 $ (5,189) U.S. government-sponsored entities 454,854 (75,795) 720,226 (93,453) 1,175,080 (169,248) Mortgage-backed securities - Agency 3,207,319 (358,507) 1,116,205 (258,921) 4,323,524 (617,428) States and political subdivisions 414,813 (25,555) 2,703 (541) 417,516 (26,096) Pooled trust preferred securities — — 10,811 (2,972) 10,811 (2,972) Other securities 257,775 (17,045) 75,309 (9,496) 333,084 (26,541) Total available-for-sale $ 4,465,728 $ (480,166) $ 1,992,246 $ (367,308) $ 6,457,974 $ (847,474) The following table summarizes the held-to-maturity investment securities with unrecognized losses aggregated by major security type and length of time in a continuous loss position: Less than 12 months 12 months or longer Total (dollars in thousands) Fair Unrecognized Fair Unrecognized Fair Unrecognized September 30, 2023 Held-to-Maturity U.S. government-sponsored entities $ — $ — $ 617,010 $ (207,213) $ 617,010 $ (207,213) Mortgage-backed securities - Agency — — 847,652 (195,933) 847,652 (195,933) States and political subdivisions 64,441 (4,877) 864,668 (226,270) 929,109 (231,147) Total held-to-maturity $ 64,441 $ (4,877) $ 2,329,330 $ (629,416) $ 2,393,771 $ (634,293) December 31, 2022 Held-to-Maturity U.S. government-sponsored entities $ 354,293 $ (110,523) $ 302,066 $ (52,287) $ 656,359 $ (162,810) Mortgage-backed securities - Agency 367,849 (42,438) 615,114 (81,416) 982,963 (123,854) States and political subdivisions 838,689 (127,355) 135,573 (31,667) 974,262 (159,022) Total held-to-maturity $ 1,560,831 $ (280,316) $ 1,052,753 $ (165,370) $ 2,613,584 $ (445,686) The unrecognized losses on held-to-maturity investment securities presented in the table above do not include unrecognized losses on securities that were transferred from available-for-sale to held-to-maturity totaling $132.3 million at September 30, 2023 and $148.9 million at December 31, 2022. These unrecognized losses are included as a separate component of shareholders’ equity and are being amortized over the remaining term of the securities. No allowance for credit losses on available-for-sale debt securities was needed at September 30, 2023 or December 31, 2022. An allowance on held-to-maturity debt securities is maintained for certain municipal bonds to account for expected lifetime credit losses. Substantially all of the U.S. government-sponsored entities and agencies and agency mortgage-backed securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major credit rating agencies, and have a long history of no credit losses. Therefore, for those securities, we do not record expected credit losses. The allowance for credit losses on held-to-maturity debt securities was $0.2 million at September 30, 2023 and December 31, 2022. Accrued interest receivable on the securities portfolio is excluded from the estimate of credit losses and totaled $38.0 million at September 30, 2023 and $50.9 million at December 31, 2022. At September 30, 2023, Old National’s securities portfolio consisted of 3,007 securities, 2,917 of which were in an unrealized loss position. The unrealized losses attributable to our U.S. Treasury, U.S. government-sponsored entities and agencies, agency mortgage-backed securities, states and political subdivisions, and other securities are the result of fluctuations in interest rates and temporary market movements. Old National’s pooled trust preferred securities are evaluated using collateral-specific assumptions to estimate the expected future interest and principal cash flows. At September 30, 2023, we had no intent to sell any securities that were in an unrealized loss position nor is it expected that we would be required to sell the securities prior to their anticipated recovery. Old National’s two pooled trust preferred securities with fair values totaling $11.1 million and unrealized losses totaling $2.7 million have experienced credit defaults. However, we believe that the value of the instruments lies in the full and timely interest payments that will be received through maturity, the steady amortization that will be experienced until maturity, and the full return of principal by the final maturity of the collateralized debt obligations. Old National did not recognize any losses on these securities for the nine months ended September 30, 2023 or 2022. Equity Securities Equity securities consist of mutual funds for Community Reinvestment Act qualified investments and diversified investment securities held in a grantor trust for participants in the Company’s nonqualified deferred compensation plan. Old National’s equity securities with readily determinable fair values totaled $69.9 million at September 30, 2023 and $52.5 million at December 31, 2022. There were losses on equity securities of $0.8 million during the three months ended September 30, 2023 and losses of $1.4 million during the nine months ended September 30, 2023, compared to losses of $0.7 million and $4.9 million during the three and nine months ended September 30, 2022, respectively. Alternative Investments Old National has alternative investments without readily determinable fair values that are included in other assets totaling $418.3 million at September 30, 2023, consisting of $242.3 million of illiquid investments in partnerships, limited liability companies, and other ownership interests that support affordable housing and $176.0 million of economic development and community revitalization initiatives in low-to-moderate income neighborhoods. These alternative investments totaled $396.8 million at December 31, 2022. There have been no impairments or adjustments on equity securities without readily determinable fair values, except for amortization of tax credit investments in the nine months ended September 30, 2023 and 2022. See Note 9 to the consolidated financial statements for detail regarding these investments.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Loans and Allowance for Credit Losses	LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans Old National’s loans consist primarily of loans made to consumers and commercial clients in many diverse industries, including real estate rental and leasing, manufacturing, healthcare, wholesale trade, construction, and agriculture, among others. Most of Old National’s lending activity occurs within our principal geographic markets in the Midwest region. Old National manages concentrations of credit exposure by industry, product, geography, client relationship, and loan size. The loan categories used to monitor and analyze interest income and yields are different than the portfolio segments used to determine the allowance for credit losses on loans. The allowance for credit losses was calculated by pooling loans of similar credit risk characteristics and credit monitoring procedures. The four loan portfolios used to monitor and analyze interest income and yields – commercial, commercial real estate, residential real estate, and consumer – are reclassified into seven segments of loans – commercial, commercial real estate, BBCC, residential real estate, indirect, direct, and home equity for purposes of determining the allowance for credit losses on loans. The commercial and commercial real estate loan categories shown on the balance sheet include the same pool of loans as the commercial, commercial real estate, and BBCC portfolio segments. The consumer loan category shown on the balance sheet is comprised of the same loans in the indirect, direct, and home equity portfolio segments. The portfolio segment reclassifications follow: Balance Sheet Portfolio After (dollars in thousands) September 30, 2023 Loans: Commercial $ 9,333,448 $ (226,353) $ 9,107,095 Commercial real estate 13,916,221 (165,593) 13,750,628 BBCC N/A 391,946 391,946 Residential real estate 6,696,288 — 6,696,288 Consumer 2,631,877 (2,631,877) N/A Indirect N/A 1,047,224 1,047,224 Direct N/A 542,689 542,689 Home equity N/A 1,041,964 1,041,964 Total $ 32,577,834 $ — $ 32,577,834 December 31, 2022 Loans: Commercial $ 9,508,904 $ (210,280) $ 9,298,624 Commercial real estate 12,457,070 (158,322) 12,298,748 BBCC N/A 368,602 368,602 Residential real estate 6,460,441 — 6,460,441 Consumer 2,697,226 (2,697,226) N/A Indirect N/A 1,034,257 1,034,257 Direct N/A 629,186 629,186 Home equity N/A 1,033,783 1,033,783 Total $ 31,123,641 $ — $ 31,123,641 The composition of loans by portfolio segment follows: (dollars in thousands) September 30, December 31, Commercial (1) $ 9,107,095 $ 9,298,624 Commercial real estate 13,750,628 12,298,748 BBCC 391,946 368,602 Residential real estate 6,696,288 6,460,441 Indirect 1,047,224 1,034,257 Direct 542,689 629,186 Home equity 1,041,964 1,033,783 Total loans 32,577,834 31,123,641 Allowance for credit losses on loans (303,982) (303,671) Net loans $ 32,273,852 $ 30,819,970 (1) Includes direct finance leases of $173.0 million at September 30, 2023 and $188.1 million at December 31, 2022. The risk characteristics of each loan portfolio segment are as follows: Commercial Commercial loans are classified primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its clients. Commercial Real Estate Commercial real estate loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts, and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be adversely affected by conditions in the real estate markets or in the general economy. The properties securing Old National’s commercial real estate portfolio are diverse in terms of type and geographic location. Management monitors and evaluates commercial real estate loans based on collateral, geography, and risk grade criteria. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Included with commercial real estate are construction loans, which are underwritten utilizing independent appraisal reviews, sensitivity analysis of absorption and lease rates, financial analysis of the developers and property owners, and feasibility studies, if available. Construction loans are generally based on estimates of costs and value associated with the complete project. These estimates may be inaccurate. Construction loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders (including Old National), sales of developed property, or an interim loan commitment from Old National until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being sensitive to interest rate changes, governmental regulation of real property, general economic conditions, and the availability of long-term financing. At 245%, Old National Bank’s applicable investor commercial real estate loans as a percentage of its risk-based capital remained below the regulatory guideline limit of 300% at September 30, 2023. BBCC BBCC loans are typically granted to small businesses with gross revenues of less than $5 million and aggregate debt of less than $1 million. Old National has established minimum debt service coverage ratios, minimum FICO scores for owners and guarantors, and the ability to show relatively stable earnings as criteria to help mitigate risk. Repayment of these loans depends on the personal income of the borrowers and the cash flows of the business. These factors can be affected by factors such as changes in economic conditions and unemployment levels. Residential With respect to residential loans that are secured by 1 - 4 family residences and are generally owner occupied, Old National typically establishes a maximum loan-to-value ratio and generally requires private mortgage insurance if that ratio is exceeded. Repayment of these loans is primarily dependent on the personal income of the borrowers, which can be impacted by economic conditions in their market areas such as unemployment levels. Repayment can also be impacted by changes in residential property values. Portfolio risk is mitigated by the fact that the loans are of smaller individual amounts and spread over a large number of borrowers. Indirect Indirect loans are secured by automobile collateral, generally new and used cars and trucks from auto dealers that operate within our footprint. Old National typically mitigates the risk of indirect loans by establishing minimum FICO scores, maximum loan-to-value ratios, and maximum debt-to-income ratios. Repayment of these loans depends largely on the personal income of the borrowers, which can be affected by changes in economic conditions such as unemployment levels. Portfolio risk is mitigated by the fact that the loans are of smaller amounts spread over many borrowers, conservative credit policies, and ongoing reviews of dealer relationships. Direct Direct loans are typically secured by collateral such as auto or real estate or are unsecured. Old National has established conservative underwriting standards such as minimum FICO scores, maximum loan-to-value ratios, and maximum debt-to-income ratios. Repayment of these loans depends largely on the personal income of the borrowers, which can be affected by changes in economic conditions such as unemployment levels. Portfolio risk is mitigated by the fact that the loans are of smaller amounts spread over many borrowers along with conservative credit policies. Home Equity Home equity loans are generally secured by 1 - 4 family residences that are owner occupied. Old National has established conservative underwriting standards such as minimum FICO scores, maximum loan-to-value ratios, and maximum debt-to-income ratios. Repayment of these loans depends largely on the personal income of the borrowers, which can be affected by changes in economic conditions such as unemployment levels. Portfolio risk is mitigated by the fact that the loans are of smaller amounts spread over many borrowers, along with conservative credit policies as well as monitoring of updated borrower credit scores. Allowance for Credit Losses Loans Credit quality within the loans held for investment portfolio is continuously monitored by management and is reflected within the allowance for credit losses on loans. The allowance for credit losses is an estimate of expected losses inherent within the Company’s loans held for investment portfolio. Credit quality is assessed and monitored by evaluating various attributes and the results of those evaluations are utilized in underwriting new loans and in our process for estimating expected credit losses. Expected credit loss inherent in non-cancelable off-balance-sheet credit exposures is accounted for as a separate liability included in other liabilities on the balance sheet. The allowance for credit losses on loans held for investment is adjusted by a credit loss expense, which is reported in earnings, and reduced by the charge-off of loan amounts, net of recoveries. Old National has made a policy election to report accrued interest receivable as a separate line item on the balance sheet. Accrued interest receivable on loans is excluded from the estimate of credit losses and totaled $162.8 million at September 30, 2023 and $137.7 million at December 31, 2022. The allowance for credit loss estimation process involves procedures to appropriately consider the unique characteristics of our loan portfolio segments. These segments are further disaggregated into loan classes based on the level at which credit risk is monitored. When computing the level of expected credit losses, credit loss assumptions are estimated using a model that categorizes loan pools based on loss history, delinquency status, and other credit trends and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. Determining the appropriateness of the allowance is complex and requires judgment by management about the effect of matters that are inherently uncertain. In future periods, evaluations of the overall loan portfolio, in light of the factors and forecasts then prevailing, may result in significant changes in the allowance and credit loss expense in those future periods. The allowance level is influenced by loan volumes, loan AQR migration or delinquency status, changes in historical loss experience, and other conditions influencing loss expectations, such as reasonable and supportable forecasts of economic conditions. The methodology for estimating the amount of expected credit losses reported in the allowance for credit losses has two basic components: first, an asset-specific component involving individual loans that do not share risk characteristics with other loans and the measurement of expected credit losses for such individual loans; and second, a pooled component for estimated expected credit losses for pools of loans that share similar risk characteristics. The base forecast scenario considers unemployment, gross domestic product, and the BBB ratio (BBB spread to the 10-year U.S. Treasury rate). In addition to the quantitative inputs, several qualitative factors are considered. These factors include the risk that unemployment, gross domestic product, housing product index, and the BBB ratio prove to be more severe and/or prolonged than our baseline forecast due to a variety of factors including monetary actions to control inflation, recent instability in the banking sector, conflict in Ukraine, and global supply chain issues. Old National’s activity in the allowance for credit losses on loans by portfolio segment was as follows: (dollars in thousands) Balance at Allowance Charge-offs Recoveries Provision Balance at Three Months Ended Commercial $ 127,403 $ — $ (16,705) $ 1,616 $ 12,441 $ 124,755 Commercial real estate 136,897 — (2,291) 102 10,267 144,975 BBCC 2,776 — (1,049) 70 912 2,709 Residential real estate 20,421 — (15) 28 346 20,780 Indirect 1,407 — (490) 325 79 1,321 Direct 4,755 — (2,180) 580 416 3,571 Home equity 6,896 — (20) 341 (1,346) 5,871 Total $ 300,555 $ — $ (22,750) $ 3,062 $ 23,115 $ 303,982 Three Months Ended Commercial $ 102,819 $ 3,740 $ (2,696) $ 2,206 $ 6,344 $ 112,413 Commercial real estate 141,802 6,818 (4,772) 287 (45) 144,090 BBCC 2,064 — — 108 (4) 2,168 Residential real estate 19,729 — (20) 66 1,481 21,256 Indirect 1,641 — (624) 379 189 1,585 Direct 14,412 — (3,299) 442 4,541 16,096 Home equity 5,536 — (29) 357 (1,218) 4,646 Total $ 288,003 $ 10,558 $ (11,440) $ 3,845 $ 11,288 $ 302,254 Nine Months Ended Commercial $ 120,612 $ — $ (37,459) $ 3,713 $ 37,889 $ 124,755 Commercial real estate 138,244 — (5,938) 1,394 11,275 144,975 BBCC 2,431 — (1,171) 174 1,275 2,709 Residential real estate 21,916 — (256) 153 (1,033) 20,780 Indirect 1,532 — (2,089) 1,349 529 1,321 Direct 12,116 — (8,018) 1,798 (2,325) 3,571 Home equity 6,820 — (330) 471 (1,090) 5,871 Total $ 303,671 $ — $ (55,261) $ 9,052 $ 46,520 $ 303,982 Nine Months Ended Commercial $ 27,232 $ 38,780 $ (5,919) $ 3,219 $ 49,101 $ 112,413 Commercial real estate 64,004 49,419 (5,596) 789 35,474 144,090 BBCC 2,458 — (48) 256 (498) 2,168 Residential real estate 9,347 136 (344) 636 11,481 21,256 Indirect 1,743 — (1,636) 921 557 1,585 Direct 528 31 (6,550) 1,712 20,375 16,096 Home equity 2,029 723 (107) 540 1,461 4,646 Total $ 107,341 $ 89,089 $ (20,200) $ 8,073 $ 117,951 $ 302,254 Unfunded Loan Commitments Old National maintains an allowance for credit losses on unfunded loan commitments to provide for the risk of loss inherent in these arrangements. The allowance is computed using a methodology similar to that used to determine the allowance for credit losses on loans, modified to take into account the probability of a drawdown on the commitment. The allowance for credit losses on unfunded loan commitments is classified as a liability account on the balance sheet within accrued expenses and other liabilities, while the corresponding provision for unfunded loan commitments is included in the provision for credit losses. Old National’s activity in the allowance for credit losses on unfunded loan commitments was as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Allowance for credit losses on unfunded loan commitments: Balance at beginning of period $ 37,007 $ 21,966 $ 32,188 $ 10,879 Provision for credit losses on unfunded loan commitments — — — 11,013 (Recapture of) provision for credit losses on unfunded loan (4,047) 4,203 772 4,277 Balance at end of period $ 32,960 $ 26,169 $ 32,960 $ 26,169 Credit Quality Old National’s management monitors the credit quality of its loans on an ongoing basis with the AQR for commercial loans reviewed annually or at renewal and the performance of its residential and consumer loans based upon the accrual status refreshed at least quarterly. Internally, management assigns an AQR to each non-homogeneous commercial, commercial real estate, and BBCC loan in the portfolio. The primary determinants of the AQR are the reliability of the primary source of repayment and the past, present, and projected financial condition of the borrower. The AQR will also consider current industry conditions. Major factors used in determining the AQR can vary based on the nature of the loan, but commonly include factors such as debt service coverage, internal cash flow, liquidity, leverage, operating performance, debt burden, FICO scores, occupancy, interest rate sensitivity, and expense burden. Old National uses the following definitions for risk ratings: Criticized . Special mention loans that have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. Classified – Substandard . Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Classified – Nonaccrual . Loans classified as nonaccrual have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection in full, on the basis of currently existing facts, conditions, and values, in doubt. Classified – Doubtful . Loans classified as doubtful have all the weaknesses inherent in those classified as nonaccrual, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Pass rated loans are those loans that are other than criticized, classified – substandard, classified – nonaccrual, or classified – doubtful. The following table summarizes the amortized cost of term loans by risk category of commercial, commercial real estate, and BBCC loans by loan portfolio segment, class of loan, and origination year: (dollars in thousands) Origination Year Revolving to Term 2023 2022 2021 2020 2019 Prior Revolving Total September 30, 2023 Commercial: Pass $ 1,615,716 $ 1,690,168 $ 1,095,758 $ 553,187 $ 479,907 $ 501,610 $ 2,000,147 $ 454,995 $ 8,391,488 Criticized 27,469 110,893 21,107 46,241 22,674 54,738 107,105 32,247 422,474 Classified: Substandard 19,509 40,694 32,135 38,892 9,970 20,431 66,977 15,417 244,025 Nonaccrual — 5,748 2,034 284 2,718 — — — 10,784 Doubtful — 18,838 5,626 1,762 962 11,136 — — 38,324 Total $ 1,662,694 $ 1,866,341 $ 1,156,660 $ 640,366 $ 516,231 $ 587,915 $ 2,174,229 $ 502,659 $ 9,107,095 Commercial real estate: Pass $ 1,805,852 $ 3,432,536 $ 2,715,562 $ 1,734,359 $ 1,117,895 $ 1,273,742 $ 73,590 $ 796,442 $ 12,949,978 Criticized 58,440 62,461 42,128 28,716 27,978 90,549 9,959 21,023 341,254 Classified: Substandard 21,214 84,269 23,589 16,822 78,165 41,313 — 50,424 315,796 Nonaccrual — 2,983 11,470 1,428 52 11,385 — 792 28,110 Doubtful — 1,649 33,564 4,142 38,199 37,936 — — 115,490 Total $ 1,885,506 $ 3,583,898 $ 2,826,313 $ 1,785,467 $ 1,262,289 $ 1,454,925 $ 83,549 $ 868,681 $ 13,750,628 BBCC: Pass $ 74,658 $ 76,281 $ 49,463 $ 42,980 $ 30,085 $ 14,488 $ 66,281 $ 18,582 $ 372,818 Criticized 2,295 2,469 1,114 76 1,110 — 2,470 2,264 11,798 Classified: Substandard 98 733 619 24 401 1,196 100 438 3,609 Nonaccrual 216 451 310 340 — 87 477 278 2,159 Doubtful — 865 492 50 67 88 — — 1,562 Total $ 77,267 $ 80,799 $ 51,998 $ 43,470 $ 31,663 $ 15,859 $ 69,328 $ 21,562 $ 391,946 (dollars in thousands) Origination Year Revolving to Term 2022 2021 2020 2019 2018 Prior Revolving Total December 31, 2022 Commercial: Pass $ 2,388,618 $ 1,754,364 $ 796,340 $ 738,208 $ 362,986 $ 388,617 $ 1,988,763 $ 329,119 $ 8,747,015 Criticized 40,856 30,661 63,557 33,490 9,195 5,312 61,036 4,327 248,434 Classified: Substandard 37,223 47,522 16,540 22,925 4,844 21,204 67,402 25,143 242,803 Nonaccrual 3,627 1,453 566 — — — 1,634 6,623 13,903 Doubtful 2,821 17,604 3,720 8,005 5,968 8,351 — — 46,469 Total $ 2,473,145 $ 1,851,604 $ 880,723 $ 802,628 $ 382,993 $ 423,484 $ 2,118,835 $ 365,212 $ 9,298,624 Commercial real estate: Pass $ 3,066,960 $ 2,828,758 $ 1,989,000 $ 1,219,025 $ 675,572 $ 1,018,719 $ 57,818 $ 689,553 $ 11,545,405 Criticized 75,306 34,422 22,569 82,637 86,504 56,864 — 23,282 381,584 Classified: Substandard 46,231 16,928 24,319 78,468 57,824 21,591 — 4,108 249,469 Nonaccrual 3,151 9,541 5,014 — 2,312 22,155 — 3,257 45,430 Doubtful 1,934 38,386 10,011 4,605 1,523 20,401 — — 76,860 Total $ 3,193,582 $ 2,928,035 $ 2,050,913 $ 1,384,735 $ 823,735 $ 1,139,730 $ 57,818 $ 720,200 $ 12,298,748 BBCC: Pass $ 90,341 $ 64,161 $ 52,304 $ 36,868 $ 23,618 $ 11,333 $ 60,016 $ 18,881 $ 357,522 Criticized 1,504 525 368 692 353 — 1,006 1,603 6,051 Classified: Substandard 811 143 — 421 — — 543 682 2,600 Nonaccrual 42 37 118 — 429 284 — 639 1,549 Doubtful 40 107 439 157 64 73 — — 880 Total $ 92,738 $ 64,973 $ 53,229 $ 38,138 $ 24,464 $ 11,690 $ 61,565 $ 21,805 $ 368,602 For residential real estate and consumer loan classes, Old National evaluates credit quality based on the aging status of the loan and by payment activity. The performing or nonperforming status is updated on an on-going basis dependent upon improvement and deterioration in credit quality. The following table presents the amortized cost of term residential real estate and consumer loans based on payment activity and origination year: Origination Year Revolving to Term (dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Total September 30, 2023 Residential real estate: Risk Rating: Performing $ 362,518 $ 1,504,933 $ 1,861,729 $ 1,732,039 $ 444,411 $ 750,037 $ — $ 279 $ 6,655,946 Nonperforming — 3,529 2,905 4,538 3,343 26,027 — — 40,342 Total $ 362,518 $ 1,508,462 $ 1,864,634 $ 1,736,577 $ 447,754 $ 776,064 $ — $ 279 $ 6,696,288 Indirect: Risk Rating: Performing $ 309,220 $ 390,012 $ 181,235 $ 96,148 $ 46,877 $ 19,666 $ — $ 196 $ 1,043,354 Nonperforming 120 1,270 1,175 604 361 340 — — 3,870 Total $ 309,340 $ 391,282 $ 182,410 $ 96,752 $ 47,238 $ 20,006 $ — $ 196 $ 1,047,224 Direct: Risk Rating: Performing $ 84,749 $ 99,625 $ 107,539 $ 54,070 $ 35,065 $ 87,207 $ 63,877 $ 4,852 $ 536,984 Nonperforming 87 486 522 403 316 3,874 6 11 5,705 Total $ 84,836 $ 100,111 $ 108,061 $ 54,473 $ 35,381 $ 91,081 $ 63,883 $ 4,863 $ 542,689 Home equity: Risk Rating: Performing $ 1 $ 692 $ 387 $ 690 $ 743 $ 5,736 $ 994,797 $ 23,918 $ 1,026,964 Nonperforming — 24 219 203 758 4,810 1,692 7,294 15,000 Total $ 1 $ 716 $ 606 $ 893 $ 1,501 $ 10,546 $ 996,489 $ 31,212 $ 1,041,964 Origination Year Revolving to Term 2022 2021 2020 2019 2018 Prior Revolving Total December 31, 2022 Residential real estate: Risk Rating: Performing $ 1,327,168 $ 1,945,792 $ 1,825,762 $ 478,529 $ 136,260 $ 712,175 $ 7 $ 88 $ 6,425,781 Nonperforming 59 529 861 873 1,826 30,512 — — 34,660 Total $ 1,327,227 $ 1,946,321 $ 1,826,623 $ 479,402 $ 138,086 $ 742,687 $ 7 $ 88 $ 6,460,441 Indirect: Risk Rating: Performing $ 504,410 $ 249,407 $ 144,265 $ 82,304 $ 31,484 $ 19,095 $ — $ 62 $ 1,031,027 Nonperforming 348 1,074 645 531 304 328 — — 3,230 Total $ 504,758 $ 250,481 $ 144,910 $ 82,835 $ 31,788 $ 19,423 $ — $ 62 $ 1,034,257 Direct: Risk Rating: Performing $ 132,934 $ 164,126 $ 77,406 $ 57,919 $ 45,299 $ 59,212 $ 87,622 $ 671 $ 625,189 Nonperforming 115 851 614 205 327 1,526 5 354 3,997 Total $ 133,049 $ 164,977 $ 78,020 $ 58,124 $ 45,626 $ 60,738 $ 87,627 $ 1,025 $ 629,186 Home equity: Risk Rating: Performing $ 919 $ 896 $ 1,849 $ 1,497 $ 983 $ 11,646 $ 990,001 $ 14,792 $ 1,022,583 Nonperforming 166 160 166 446 794 4,308 1,698 3,462 11,200 Total $ 1,085 $ 1,056 $ 2,015 $ 1,943 $ 1,777 $ 15,954 $ 991,699 $ 18,254 $ 1,033,783 The following table summarizes the gross charge-offs of loans by loan portfolio segment and origination year: Origination Year (dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Total Three Months Ended September 30, 2023 Commercial $ — $ 4,154 $ 12,271 $ — $ — $ 63 $ 217 $ 16,705 Commercial real estate — — — 1,744 — 547 — 2,291 BBCC 499 501 49 — — — — 1,049 Residential real estate — — — — — 15 — 15 Indirect 75 276 86 12 10 31 — 490 Direct 19 429 423 112 270 60 867 2,180 Home equity — — — — — 20 — 20 Total gross charge-offs $ 593 $ 5,360 $ 12,829 $ 1,868 $ 280 $ 736 $ 1,084 $ 22,750 Nine Months Ended September 30, 2023 Commercial $ — $ 6,254 $ 23,432 $ 120 $ 6,789 $ 302 $ 562 $ 37,459 Commercial real estate — 54 735 2,144 — 3,005 — 5,938 BBCC 499 548 77 47 — — — 1,171 Residential real estate — — — — — 256 — 256 Indirect 85 954 640 153 137 120 — 2,089 Direct 19 1,330 1,805 570 1,011 450 2,833 8,018 Home equity — — — — — 330 — 330 Total gross charge-offs $ 603 $ 9,140 $ 26,689 $ 3,034 $ 7,937 $ 4,463 $ 3,395 $ 55,261 Nonaccrual and Past Due Loans Old National does not record interest on nonaccrual loans until principal is recovered. For all loan classes, a loan is generally placed on nonaccrual status when principal or interest becomes 90 days past due unless it is well secured and in the process of collection, or earlier when concern exists as to the ultimate collectability of principal or interest. Interest accrued but not received is reversed against earnings. Cash interest received on these loans is applied to the principal balance until the principal is recovered or until the loan returns to accrual status. Loans may be returned to accrual status when all the principal and interest amounts contractually due are brought current, remain current for a prescribed period, and future payments are reasonably assured. The following table presents the aging of the amortized cost basis in past due loans by class of loans: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2023 Commercial $ 2,754 $ 4,214 $ 12,504 $ 19,472 $ 9,087,623 $ 9,107,095 Commercial real estate 15,954 6,295 21,366 43,615 13,707,013 13,750,628 BBCC 1,273 511 712 2,496 389,450 391,946 Residential 29,762 6,784 12,733 49,279 6,647,009 6,696,288 Indirect 5,576 1,368 1,156 8,100 1,039,124 1,047,224 Direct 3,626 1,059 1,588 6,273 536,416 542,689 Home equity 5,840 1,808 6,077 13,725 1,028,239 1,041,964 Total $ 64,785 $ 22,039 $ 56,136 $ 142,960 $ 32,434,874 $ 32,577,834 December 31, 2022 Commercial $ 14,147 $ 4,801 $ 11,080 $ 30,028 $ 9,268,596 $ 9,298,624 Commercial real estate 47,240 1,312 32,892 81,444 12,217,304 12,298,748 BBCC 730 365 603 1,698 366,904 368,602 Residential 24,181 5,033 11,753 40,967 6,419,474 6,460,441 Indirect 6,302 2,118 958 9,378 1,024,879 1,034,257 Direct 5,404 2,118 1,928 9,450 619,736 629,186 Home equity 6,585 1,966 4,707 13,258 1,020,525 1,033,783 Total $ 104,589 $ 17,713 $ 63,921 $ 186,223 $ 30,937,418 $ 31,123,641 The following table presents the amortized cost basis of loans on nonaccrual status and loans past due 90 days or more and still accruing by class of loan: September 30, 2023 December 31, 2022 (dollars in thousands) Nonaccrual Nonaccrual Past Due Nonaccrual Nonaccrual Past Due Commercial $ 49,108 $ 13,432 $ 577 $ 60,372 $ 7,873 $ 152 Commercial real estate 143,600 29,721 104 122,290 33,445 — BBCC 3,721 — — 2,429 — — Residential 40,342 — — 34,660 — 1,808 Indirect 3,870 — 54 3,230 — 28 Direct 5,705 — 109 3,997 — 133 Home equity 15,000 — 348 11,200 — 529 Total $ 261,346 $ 43,153 $ 1,192 $ 238,178 $ 41,318 $ 2,650 Interest income recognized on nonaccrual loans was insignificant during the three and nine months ended September 30, 2023 and 2022. When management determines that foreclosure is probable, expected credit losses for collateral dependent loans are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. A loan is considered collateral dependent when the borrower is experiencing financial difficulty and the loan is expected to be repaid substantially through the operation or sale of the collateral. The class of loan represents the primary collateral type associated with the loan. Significant quarter-over-quarter changes are reflective of changes in nonaccrual status and not necessarily associated with credit quality indicators like appraisal value. The following table presents the amortized cost basis of collateral dependent loans by class of loan: Type of Collateral (dollars in thousands) Real Blanket Investment Auto Other September 30, 2023 Commercial $ 13,635 $ 31,856 $ 466 $ 288 $ 347 Commercial real estate 131,826 — 1,205 — 6,184 BBCC 2,131 1,174 — 416 — Residential 40,342 — — — — Indirect — — — 3,870 — Direct 4,622 1 3 296 31 Home equity 15,000 — — — — Total loans $ 207,556 $ 33,031 $ 1,674 $ 4,870 $ 6,562 December 31, 2022 Commercial $ 8,962 $ 42,754 $ 2,690 $ 1,611 $ 980 Commercial real estate 108,871 — 1,718 — 6,411 BBCC 1,939 478 — 12 — Residential 34,660 — — — — Indirect — — — 3,230 — Direct 2,991 13 — 232 23 Home equity 11,200 — — — — Total loans $ 168,623 $ 43,245 $ 4,408 $ 5,085 $ 7,414 Loan Participations Old National has loan participations, which qualify as participating interests, with other financial institutions. At September 30, 2023, these loans totaled $2.8 billion, of which $1.2 billion had been sold to other financial institutions and $1.6 billion was retained by Old National. The loan participations convey proportionate ownership rights with equal priority to each participating interest holder; involve no recourse (other than ordinary representations and warranties) to, or subordination by, any participating interest holder; all cash flows are divided among the participating interest holders in proportion to each holder’s share of ownership; and no holder has the right to pledge the entire financial asset unless all participating interest holders agree. Financial Difficulty Modifications Occasionally, Old National modifies loans to borrowers experiencing financial difficulty in the form of principal forgiveness, term extension, an other-than-insignificant payment delay, or interest rate reduction (or a combination thereof). When principal forgiveness is provided, the amount of forgiveness is charged-off against the allowance for credit losses on loans. The following table presents the amortized cost basis of financial difficulty modifications at September 30, 2023 that were modified during the three and nine months ended September 30, 2023 by class of loans and type of modification: (dollars in thousands) Term Total Three Months Ended September 30, 2023 Commercial $ 3,502 0.0 % Commercial real estate 93,844 0.7 % Total $ 97,346 0.3 % Nine Months Ended September 30, 2023 Commercial $ 20,811 0.2 % Commercial real estate 116,580 0.8 % Total $ 137,391 0.4 % Old National closely monitors the performance of financial difficulty modifications to understand the effectiveness of its efforts. The following table presents the performance of loans identified as financial difficulty modifications at September 30, 2023: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2023 Commercial $ — $ — $ 2,541 $ 2,541 $ 18,270 $ 20,811 Commercial real estate 1,086 — — 1,086 115,494 116,580 Total $ 1,086 $ — $ 2,541 $ 3,627 $ 133,764 $ 137,391 The following table summarizes the nature of the financial difficulty modifications during the three and nine months ended September 30, 2023 by class of loans: (dollars in thousands) Weighted- Three Months Ended September 30, 2023 Commercial 7.3 Commercial real estate 9.2 Total 9.2 Nine Months Ended September 30, 2023 Commercial 5.7 Commercial real estate 8.9 Total 8.4 There were no payment defaults on these loans subsequent to their modifications during the three and nine months ended September 30, 2023. At September 30, 2023, Old National had not committed to lend any material additional funds to the borrowers whose loans were modified due to financial difficulties.

Leases

Leases	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Leases	LEASES Old National has operating and finance leases for land, office space, banking centers, and equipment. These leases are generally for periods of 5 to 20 years with various renewal options. We include certain renewal options in the measurement of our right-of-use assets and lease liabilities if they are reasonably certain to be exercised. Variable lease payments that are dependent on an index or a rate are initially measured using the index or rate at the commencement date and are included in the measurement of the lease liability. Variable lease payments that are not dependent on an index or a rate are excluded from the measurement of the lease liability and are recognized in profit and loss when incurred. Variable lease payments are defined as payments made for the right to use an asset that vary because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. Old National has lease agreements with lease and non-lease components, which are generally accounted for separately. For real estate leases, non-lease components and other non-components, such as common area maintenance charges, real estate taxes, and insurance are not included in the measurement of the lease liability since they are generally able to be segregated. For certain equipment leases, Old National accounts for the lease and non-lease components as a single lease component using the practical expedient available for that class of assets. Old National does not have any material sub-lease agreements. The components of lease expense were as follows: Affected Line Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Operating lease cost Occupancy/Equipment expense $ 7,462 $ 7,657 $ 23,569 $ 21,323 Finance lease cost: Amortization of right-of-use assets Occupancy expense 742 680 2,170 2,003 Interest on lease liabilities Interest expense 183 105 536 315 Sub-lease income Occupancy expense (119) (87) (281) (389) Total $ 8,268 $ 8,355 $ 25,994 $ 23,252 Supplemental balance sheet information related to leases was as follows: (dollars in thousands) September 30, December 31, Operating Leases Operating lease right-of-use assets $ 179,284 $ 189,714 Operating lease liabilities 199,937 211,964 Finance Leases Premises and equipment, net 20,571 10,799 Other borrowings 21,595 13,469 Weighted-Average Remaining Lease Term (in Years) Operating leases 8.5 9.1 Finance leases 10.6 7.2 Weighted-Average Discount Rate Operating leases 2.93 % 2.88 % Finance leases 3.89 % 3.30 % Supplemental cash flow information related to leases was as follows: Nine Months Ended (dollars in thousands) 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 23,766 $ 22,223 Operating cash flows from finance leases 536 315 Financing cash flows from finance leases 1,893 1,839 The following table presents a maturity analysis of the Company’s lease liability by lease classification at September 30, 2023: (dollars in thousands) Operating Finance 2023 $ 7,959 $ 826 2024 31,183 3,357 2025 29,564 3,380 2026 28,622 2,154 2027 27,662 2,157 Thereafter 102,282 14,809 Total undiscounted lease payments 227,272 26,683 Amounts representing interest (27,335) (5,088) Lease liability $ 199,937 $ 21,595
Leases	LEASES Old National has operating and finance leases for land, office space, banking centers, and equipment. These leases are generally for periods of 5 to 20 years with various renewal options. We include certain renewal options in the measurement of our right-of-use assets and lease liabilities if they are reasonably certain to be exercised. Variable lease payments that are dependent on an index or a rate are initially measured using the index or rate at the commencement date and are included in the measurement of the lease liability. Variable lease payments that are not dependent on an index or a rate are excluded from the measurement of the lease liability and are recognized in profit and loss when incurred. Variable lease payments are defined as payments made for the right to use an asset that vary because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. Old National has lease agreements with lease and non-lease components, which are generally accounted for separately. For real estate leases, non-lease components and other non-components, such as common area maintenance charges, real estate taxes, and insurance are not included in the measurement of the lease liability since they are generally able to be segregated. For certain equipment leases, Old National accounts for the lease and non-lease components as a single lease component using the practical expedient available for that class of assets. Old National does not have any material sub-lease agreements. The components of lease expense were as follows: Affected Line Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Operating lease cost Occupancy/Equipment expense $ 7,462 $ 7,657 $ 23,569 $ 21,323 Finance lease cost: Amortization of right-of-use assets Occupancy expense 742 680 2,170 2,003 Interest on lease liabilities Interest expense 183 105 536 315 Sub-lease income Occupancy expense (119) (87) (281) (389) Total $ 8,268 $ 8,355 $ 25,994 $ 23,252 Supplemental balance sheet information related to leases was as follows: (dollars in thousands) September 30, December 31, Operating Leases Operating lease right-of-use assets $ 179,284 $ 189,714 Operating lease liabilities 199,937 211,964 Finance Leases Premises and equipment, net 20,571 10,799 Other borrowings 21,595 13,469 Weighted-Average Remaining Lease Term (in Years) Operating leases 8.5 9.1 Finance leases 10.6 7.2 Weighted-Average Discount Rate Operating leases 2.93 % 2.88 % Finance leases 3.89 % 3.30 % Supplemental cash flow information related to leases was as follows: Nine Months Ended (dollars in thousands) 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 23,766 $ 22,223 Operating cash flows from finance leases 536 315 Financing cash flows from finance leases 1,893 1,839 The following table presents a maturity analysis of the Company’s lease liability by lease classification at September 30, 2023: (dollars in thousands) Operating Finance 2023 $ 7,959 $ 826 2024 31,183 3,357 2025 29,564 3,380 2026 28,622 2,154 2027 27,662 2,157 Thereafter 102,282 14,809 Total undiscounted lease payments 227,272 26,683 Amounts representing interest (27,335) (5,088) Lease liability $ 199,937 $ 21,595

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS The following table presents the changes in the carrying amount of goodwill: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Balance at beginning of period $ 1,998,716 $ 1,991,534 $ 1,998,716 $ 1,036,994 Acquisitions and adjustments — 11,065 — 965,605 Balance at end of period $ 1,998,716 $ 2,002,599 $ 1,998,716 $ 2,002,599 The increase in goodwill for the three and nine months ended September 30, 2022 was due to the First Midwest merger. See Note 3 to the consolidated financial statements for additional detail regarding this transaction. Old National performed the required annual goodwill impairment test as of August 31, 2023 and concluded that there was no impairment. No events or circumstances since the August 31, 2023 annual impairment test were noted that would indicate it was more likely than not a goodwill impairment exists. The gross carrying amounts and accumulated amortization of other intangible assets were as follows: (dollars in thousands) Gross Accumulated Net September 30, 2023 Core deposit $ 143,511 $ (68,312) $ 75,199 Customer trust relationships 52,621 (19,701) 32,920 Total other intangible assets $ 196,132 $ (88,013) $ 108,119 December 31, 2022 Core deposit $ 170,642 $ (80,951) $ 89,691 Customer trust relationships 56,243 (19,529) 36,714 Total other intangible assets $ 226,885 $ (100,480) $ 126,405 Other intangible assets consist of core deposit intangibles and customer relationship intangibles and are being amortized primarily on an accelerated basis over their estimated useful lives, generally over a period of 5 to 15 years. Old National reviews other intangible assets for possible impairment whenever events or changes in circumstances indicate that carrying amounts may not be recoverable. No impairment charges were recorded during the nine months ended September 30, 2023 or 2022. Total amortization expense associated with intangible assets was $6.0 million and $18.3 million for the three and nine months ended September 30, 2023, respectively, compared to $7.1 million and $19.1 million for the three and nine months ended September 30, 2022, respectively. Estimated amortization expense for future years is as follows: (dollars in thousands) 2023 remaining $ 5,869 2024 21,239 2025 18,358 2026 15,555 2027 12,867 Thereafter 34,231 Total $ 108,119

Qualified Affordable Housing Pr

Qualified Affordable Housing Projects and Other Tax Credit Investments	9 Months Ended
	Sep. 30, 2023
Investments in Affordable Housing Projects [Abstract]
Qualified Affordable Housing Projects and Other Tax Credit Investments	QUALIFIED AFFORDABLE HOUSING PROJECTS AND OTHER TAX CREDIT INVESTMENTS Old National is a limited partner in several tax-advantaged limited partnerships whose purpose is to invest in approved qualified affordable housing, renewable energy, or other renovation or community revitalization projects. These investments are included in other assets on the balance sheet, with any unfunded commitments included with other liabilities. As of September 30, 2023, Old National expects to recover its remaining investments through the use of the tax credits that are generated by the investments. The following table summarizes Old National’s investments in qualified affordable housing projects and other tax credit investments: (dollars in thousands) September 30, 2023 December 31, 2022 Investment Accounting Method Investment Unfunded Commitment (1) Investment Unfunded LIHTC Proportional amortization $ 93,214 $ 54,440 $ 84,428 $ 55,754 FHTC Equity 36,715 27,214 19,316 9,588 NMTC Consolidation 45,637 — 51,912 — Renewable Energy Equity 385 — 1,099 — Total $ 175,951 $ 81,654 $ 156,755 $ 65,342 (1) All commitments will be paid by Old National by December 31, 2027. The following table summarizes the amortization expense and tax benefit recognized for Old National’s qualified affordable housing projects and other tax credit investments: (dollars in thousands) Amortization Expense (1) Tax Expense (Benefit) Recognized (2) Three Months Ended September 30, 2023 LIHTC $ 3,208 $ (3,582) FHTC 330 (399) NMTC 2,092 (2,611) Renewable Energy 222 — Total $ 5,852 $ (6,592) Three Months Ended September 30, 2022 LIHTC $ 1,240 $ (1,650) FHTC 215 (262) NMTC 2,237 (2,788) Renewable Energy 210 — Total $ 3,902 $ (4,700) Nine Months Ended September 30, 2023 LIHTC $ 6,135 $ (7,398) FHTC 1,178 (1,423) NMTC 6,275 (7,833) Renewable Energy 714 — Total $ 14,302 $ (16,654) Nine Months Ended September 30, 2022 LIHTC $ 3,734 $ (4,950) FHTC 635 (776) NMTC 4,439 (5,538) Renewable Energy 629 — Total $ 9,437 $ (11,264) (1) The amortization expense for the LIHTC investments is included in our income tax expense. The amortization expense for the FHTC, NMTC, and Renewable Energy tax credits is included in noninterest expense. (2) All of the tax benefits recognized are included in our income tax expense. The tax benefit recognized for the FHTC, NMTC, and Renewable Energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) and deferred tax liability of the investments’ income (loss).

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2023
Securities Sold under Agreements to Repurchase [Abstract]
Securities Sold Under Agreements to Repurchase	SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Securities sold under agreements to repurchase are secured borrowings. Old National pledges investment securities to secure these borrowings. The following table presents securities sold under agreements to repurchase and related weighted-average interest rates: At or for the Nine Months Ended September 30, (dollars in thousands) 2023 2022 Outstanding at period end $ 279,061 $ 438,053 Average amount outstanding during the period 351,362 450,966 Maximum amount outstanding at any month-end during the period 430,537 509,275 Weighted-average interest rate: During the period 0.91 % 0.09 % At period end 1.35 % 0.40 % At December 31, 2022, securities sold under agreements to repurchase totaled $432.8 million with a weighted-average interest rate of 1.31%. The following table presents the contractual maturity of our secured borrowings and class of collateral pledged: At September 30, 2023 Remaining Contractual Maturity of the Agreements (dollars in thousands) Overnight and Continuous Up to 30-90 Days Greater Than 90 days Total Repurchase Agreements: U.S. Treasury and agency securities $ 279,061 $ — $ — $ — $ 279,061 Total $ 279,061 $ — $ — $ — $ 279,061 The fair value of securities pledged to secure repurchase agreements may decline. Old National has pledged securities valued at 107% of the gross outstanding balance of repurchase agreements at September 30, 2023 to manage this risk.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2023
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances	FEDERAL HOME LOAN BANK ADVANCES The following table summarizes Old National Bank’s FHLB advances: (dollars in thousands) September 30, December 31, FHLB advances (fixed rates 0.00% to 5.61% and variable rates 5.35% to 5.36%) maturing December 2023 to September 2042 $ 4,450,528 $ 3,850,677 Fair value hedge basis adjustments and unamortized (37,952) (21,659) Total $ 4,412,576 $ 3,829,018 FHLB advances had weighted-average rates of 3.36% at September 30, 2023 and 3.15% at December 31, 2022. Certain FHLB advances are collateralized with loans and investment securities up to 190%. At September 30, 2023, total unamortized prepayment fees related to debt modifications completed in prior years totaled $15.7 million, compared to $20.2 million at December 31, 2022. Contractual maturities of FHLB advances at September 30, 2023 were as follows: (dollars in thousands) Due in 2023 $ 100,000 Due in 2024 25,243 Due in 2025 550,285 Due in 2026 100,000 Thereafter 3,675,000 Fair value hedge basis adjustments and unamortized prepayment fees (37,952) Total $ 4,412,576

Other Borrowings

Other Borrowings	9 Months Ended
	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Other Borrowings	OTHER BORROWINGS The following table summarizes Old National’s other borrowings: (dollars in thousands) September 30, December 31, Old National Bancorp: Senior unsecured notes (fixed rate 4.125%) maturing August 2024 $ 175,000 $ 175,000 Unamortized debt issuance costs related to senior unsecured notes (130) (247) Subordinated debentures (fixed rate 5.875%) maturing September 2026 150,000 150,000 Junior subordinated debentures (rates of 6.95% to 9.21%) maturing July 2031 to September 2037 136,643 136,643 Other basis adjustments 19,496 23,363 Old National Bank: Finance lease liabilities 21,595 13,469 Subordinated debentures (variable rate 9.99%) maturing October 2025 12,000 12,000 Leveraged loans for NMTC (fixed rates of 1.00% to 1.43%) maturing December 2046 to June 2060 143,745 143,187 Other (1) 205,106 89,588 Total other borrowings $ 863,455 $ 743,003 (1) Includes overnight borrowings to collateralize certain derivative positions totaling $204.5 million at September 30, 2023 and $88.0 million at December 31, 2022. Contractual maturities of other borrowings at September 30, 2023 were as follows: (dollars in thousands) Due in 2023 $ 205,160 Due in 2024 177,653 Due in 2025 14,740 Due in 2026 151,576 Due in 2027 1,636 Thereafter 292,738 Unamortized debt issuance costs and other basis adjustments 19,952 Total $ 863,455 Junior Subordinated Debentures Junior subordinated debentures related to trust preferred securities are classified in “other borrowings.” Junior subordinated debentures qualify as Tier 2 capital for regulatory purposes, subject to certain limitations. Through various mergers and acquisitions, Old National assumed junior subordinated debenture obligations related to various trusts that issued trust preferred securities. Old National guarantees the payment of distributions on the trust preferred securities issued by the trusts. Proceeds from the issuance of each of these securities were used to purchase junior subordinated debentures with the same financial terms as the securities issued by the trusts. Old National, at any time, may redeem the junior subordinated debentures at par and, thereby cause a redemption of the trust preferred securities in whole or in part. The following table summarizes the terms of our outstanding junior subordinated debentures at September 30, 2023: (dollars in thousands) Rate at September 30, Name of Trust Issuance Date Issuance Rate Maturity Date Bridgeview Statutory Trust I July 2001 $ 15,464 3-month SOFR plus 3.58% 9.21% July 31, 2031 Bridgeview Capital Trust II December 2002 15,464 3-month SOFR plus 3.35% 8.92% January 7, 2033 First Midwest Capital Trust I November 2003 37,825 6.95% fixed 6.95% December 1, 2033 St. Joseph Capital Trust II March 2005 5,155 3-month SOFR plus 1.75% 7.42% March 17, 2035 Northern States Statutory Trust I September 2005 10,310 3-month SOFR plus 1.80% 7.47% September 15, 2035 Anchor Capital Trust III August 2005 5,000 3-month SOFR plus 1.55% 7.21% September 30, 2035 Great Lakes Statutory Trust II December 2005 6,186 3-month SOFR plus 1.40% 7.07% December 15, 2035 Home Federal Statutory September 2006 15,464 3-month SOFR plus 1.65% 7.32% September 15, 2036 Monroe Bancorp Capital July 2006 3,093 3-month SOFR plus 1.60% 7.17% October 7, 2036 Tower Capital Trust 3 December 2006 9,279 3-month SOFR plus 1.69% 7.36% March 1, 2037 Monroe Bancorp Statutory March 2007 5,155 3-month SOFR plus 1.60% 7.27% June 15, 2037 Great Lakes Statutory Trust III June 2007 8,248 3-month SOFR plus 1.70% 7.37% September 15, 2037 Total $ 136,643 Subordinated Debentures Old National assumed $12.0 million of subordinated fixed-to-floating notes related to the acquisition of Anchor Bancorp, Inc. (MN). The debentures currently have a floating rate of interest equal to the three-month term SOFR rate plus 4.618%. Old National assumed $150.0 million of subordinated fixed rate notes related to the First Midwest merger. The subordinated debentures have a 5.875% fixed rate of interest through the September 29, 2026 maturity date. Leveraged Loans The leveraged loans are directly related to the NMTC structure. As part of the transaction structure, Old National has the right to sell its interest in the entity that received the leveraged loans at an agreed upon price to the leveraged lender at the end of the NMTC seven-year compliance period. See Note 9 to the consolidated financial statements for additional information on the Company’s NMTC investments. Finance Lease Liabilities Old National has long-term finance lease liabilities for certain banking centers and equipment totaling $21.6 million at September 30, 2023. See Note 7 to the consolidated financial statements for a maturity analysis of the Company’s finance lease liabilities.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table summarizes the changes within each classification of AOCI, net of tax: (dollars in thousands) Unrealized Unrealized Gains and Defined Total Three Months Ended September 30, 2023 Balance at beginning of period $ (701,393) $ (103,144) $ (4,096) $ — $ (808,633) Other comprehensive income (loss) before (156,660) — (11,546) — (168,206) Amounts reclassified from AOCI to income (1) 178 4,193 3,653 — 8,024 Balance at end of period $ (857,875) $ (98,951) $ (11,989) $ — $ (968,815) Three Months Ended September 30, 2022 Balance at beginning of period $ (437,075) $ (122,199) $ (9,875) $ 16 $ (569,133) Other comprehensive income (loss) before (217,401) — (27,725) — (245,126) Amounts reclassified from AOCI to income (1) 131 5,121 565 (8) 5,809 Balance at end of period $ (654,345) $ (117,078) $ (37,035) $ 8 $ (808,450) Nine Months Ended September 30, 2023 Balance at beginning of period $ (642,346) $ (112,664) $ (31,549) $ 137 $ (786,422) Other comprehensive income (loss) before (219,562) 1,325 34,279 — (183,958) Amounts reclassified from AOCI to income (1) 4,033 12,388 (14,719) (137) 1,565 Balance at end of period $ (857,875) $ (98,951) $ (11,989) $ — $ (968,815) Nine Months Ended September 30, 2022 Balance at beginning of period $ (2,950) $ — $ 543 $ 32 $ (2,375) Other comprehensive income (loss) before (651,330) (125,229) (37,473) — (814,032) Amounts reclassified from AOCI to income (1) (65) 8,151 (105) (24) 7,957 Balance at end of period $ (654,345) $ (117,078) $ (37,035) $ 8 $ (808,450) (1) See table below for details about reclassifications to income. The following table summarizes the amounts reclassified out of each component of AOCI for the three months ended September 30, 2023 and 2022: Three Months Ended (dollars in thousands) 2023 2022 Details about AOCI Components Amount Reclassified Affected Line Item in the Unrealized gains and losses on $ (241) $ (172) Debt securities gains (losses), net 63 41 Income tax (expense) benefit $ (178) $ (131) Net income (loss) Unrealized gains and losses on $ (5,623) $ (6,772) Interest income (expense) 1,430 1,651 Income tax (expense) benefit $ (4,193) $ (5,121) Net income (loss) Gains and losses on hedges $ (4,927) $ (749) Interest income (expense) 1,274 184 Income tax (expense) benefit $ (3,653) $ (565) Net income (loss) Amortization of defined benefit Actuarial gains (losses) $ — $ 11 Salaries and employee benefits — (3) Income tax (expense) benefit $ — $ 8 Net income (loss) Total reclassifications for the period $ (8,024) $ (5,809) Net income (loss) The following table summarizes the amounts reclassified out of each component of AOCI for the nine months ended September 30, 2023 and 2022: Nine Months Ended (dollars in thousands) 2023 2022 Details about AOCI Components Amount Reclassified Affected Line Item in the Unrealized gains and losses on $ (5,440) $ 85 Debt securities gains (losses), net 1,407 (20) Income tax (expense) benefit $ (4,033) $ 65 Net income (loss) Unrealized gains and losses on $ (16,574) $ (10,774) Interest income (expense) 4,186 2,623 Income tax (expense) benefit $ (12,388) $ (8,151) Net income (loss) Gains and losses on hedges $ 19,893 $ 139 Interest income (expense) (5,174) (34) Income tax (expense) benefit $ 14,719 $ 105 Net income (loss) Amortization of defined benefit Actuarial gains (losses) $ 182 $ 32 Salaries and employee benefits (45) (8) Income tax (expense) benefit $ 137 $ 24 Net income (loss) Total reclassifications for the period $ (1,565) $ (7,957) Net income (loss)

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Following is a summary of the major items comprising the differences in taxes from continuing operations computed at the federal statutory rate and as recorded in the consolidated statements of income: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Provision at statutory rate of 21% $ 40,358 $ 37,598 $ 122,352 $ 59,365 Tax-exempt income: Tax-exempt interest (4,625) (3,929) (13,716) (10,335) Section 291/265 interest disallowance 675 85 1,593 150 Company-owned life insurance income (743) (684) (2,315) (2,340) Tax-exempt income (4,693) (4,528) (14,438) (12,525) State income taxes 8,163 7,050 24,856 7,808 Interim period effective rate adjustment 116 (31) (607) 3,042 Tax credit investments - federal (2,071) (2,407) (7,122) (4,968) Officer compensation limitation 1,040 401 3,120 1,053 Non-deductible FDIC premiums 1,949 1,178 6,096 2,549 Other, net (558) (374) (1,139) (1,187) Income tax expense (benefit) $ 44,304 $ 38,887 $ 133,118 $ 55,137 Effective tax rate 23.1 % 21.7 % 22.9 % 19.5 % The provision for income taxes was recorded at September 30, 2023 and 2022 based on the current estimate of the effective annual rate. The higher effective tax rate during the nine months ended September 30, 2023 compared to the same period in 2022 reflected an increase in pre-tax book income combined with smaller increases in tax-exempt income and tax credits. Other contributing factors were increases in non-deductible officer compensation and non-deductible FDIC premiums as well as the First Midwest merger in February 2022. Net Deferred Tax Assets Net deferred tax assets are included in other assets on the balance sheet. At September 30, 2023, net deferred tax assets totaled $480.7 million, compared to $435.8 million at December 31, 2022. No valuation allowance was required on the Company’s deferred tax assets at September 30, 2023 or December 31, 2022. The Company’s retained earnings at September 30, 2023 included an appropriation for acquired thrifts’ tax bad debt allowances totaling $58.6 million for which no provision for federal or state income taxes has been made. If in the future, this portion of retained earnings were distributed as a result of the liquidation of the Company or its subsidiaries, federal and state income taxes would be imposed at the then applicable rates. Old National has federal net operating loss carryforwards totaling $68.4 million at September 30, 2023 and $81.5 million at December 31, 2022. This federal net operating loss was acquired from the acquisition of Anchor BanCorp Wisconsin Inc. in 2016 and First Midwest in 2022. If not used, the federal net operating loss carryforwards will begin expiring in 2030 and later. Old National has recorded state net operating loss carryforwards totaling $115.6 million at September 30, 2023 and $124.4 million at December 31, 2022. If not used, the state net operating loss carryforwards will expire from 2027 to 2036. The federal and recorded state net operating loss carryforwards are subject to an annual limitation under Internal Revenue Code section 382. Old National believes that all of the federal and recorded state net operating loss carryforwards will be used prior to expiration.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTS As part of our overall interest rate risk management, Old National uses derivative instruments, including interest rate swaps, collars, caps, and floors. The notional amount does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual agreements. Derivative instruments are recognized on the balance sheet at their fair value and are not reported on a net basis. Credit risk arises from the possible inability of counterparties to meet the terms of their contracts. Old National’s exposure is limited to the termination value of the contracts rather than the notional, principal, or contract amounts. There are provisions in our agreements with the counterparties that allow for certain unsecured credit exposure up to an agreed threshold. Exposures in excess of the agreed thresholds are collateralized. In addition, we minimize credit risk through credit approvals, limits, and monitoring procedures. Derivatives Designated as Hedges Subsequent changes in fair value for a hedging instrument that has been designated and qualifies as part of a hedging relationship are accounted for in the following manner: Cash flow hedges : changes in fair value are recognized as a component in other comprehensive income (loss). Fair value hedges : changes in fair value are recognized concurrently in earnings. As long as a hedging instrument is designated and the results of the effectiveness testing support that the instrument qualifies for hedge accounting treatment, 100% of the periodic changes in fair value of the hedging instrument are accounted for as outlined above. This is the case whether or not economic mismatches exist in the hedging relationship. As a result, there is no periodic measurement or recognition of ineffectiveness. Rather, the full impact of hedge gains and losses is recognized in the period in which the hedged transactions impact earnings. The change in fair value of the hedging instrument that is included in the assessment of hedge effectiveness is presented in the same income statement line item that is used to present the earnings effect of the hedged item. Cash Flow Hedges Interest rate swaps of certain borrowings were designated as cash flow hedges totaling $150.0 million notional amount at both September 30, 2023 and December 31, 2022. Interest rate collars and floors related to variable-rate commercial loan pools were designated as cash flow hedges totaling $1.5 billion notional amount at September 30, 2023 and $1.9 billion notional amount at December 31, 2022. The hedges were determined to be effective during all periods presented and we expect them to remain effective during the remaining terms. Old National has designated its interest rate collars as cash flow hedges. The structure of these instruments is such that Old National pays the counterparty an incremental amount if the collar index exceeds the cap rate. Conversely, Old National receives an incremental amount if the index falls below the floor rate. No payments are required if the collar index falls between the cap and floor rates. Old National has designated its interest rate floor transactions as cash flow hedges. The structure of these instruments is such that Old National receives an incremental amount if the index falls below the floor strike rate. No payments are required if the index remains above the floor strike rate. Fair Value Hedges Interest rate swaps of certain borrowings were designated as fair value hedges totaling $700.0 million notional amount at September 30, 2023 and $300.0 million notional amount at December 31, 2022. Interest rate swaps of certain available-for-sale investment securities were designated as fair value hedges totaling $998.1 million notional amount at September 30, 2023 and $910.0 million notional amount at December 31, 2022. The hedges were determined to be effective during all periods presented and we expect them to remain effective during the remaining terms. The following table summarizes Old National’s derivatives designated as hedges: September 30, 2023 December 31, 2022 Fair Value Fair Value (dollars in thousands) Notional Assets (1) Liabilities (2) Notional Assets (1) Liabilities (2) Cash flow hedges Interest rate collars and floors on loan pools $ 1,500,000 $ 2,214 $ 27,749 $ 1,900,000 $ 11,764 $ 47,859 Interest rate swaps on borrowings (3) 150,000 — — 150,000 — — Fair value hedges Interest rate swaps on investment securities (3) 998,107 — — 909,957 — — Interest rate swaps on borrowings (3) 700,000 — — 300,000 — — Total $ 2,214 $ 27,749 $ 11,764 $ 47,859 (1) Derivative assets are included in other assets on the balance sheet. (2) Derivative liabilities are included in other liabilities on the balance sheet. (3) The fair values of certain counterparty interest rate swaps are zero due to the settlement of centrally cleared variation margin rules. The effect of derivative instruments in fair value hedging relationships on the consolidated statements of income were as follows: (dollars in thousands) Gain (Loss) Derivatives in Location of Gain or Gain (Loss) Hedged Items Location of Gain or Three Months Ended September 30, 2023 Interest rate contracts Interest income/(expense) $ (9,553) Fixed-rate debt Interest income/(expense) $ 9,566 Interest rate contracts Interest income/(expense) 45,537 Fixed-rate Interest income/(expense) (46,055) Total $ 35,984 $ (36,489) Three Months Ended Interest rate contracts Interest income/(expense) $ (532) Fixed-rate debt Interest income/(expense) $ 638 Interest rate contracts Interest income/(expense) 47,963 Fixed-rate Interest income/(expense) (47,975) Total $ 47,431 $ (47,337) Nine Months Ended Interest rate contracts Interest income/(expense) $ (18,500) Fixed-rate debt Interest income/(expense) $ 18,303 Interest rate contracts Interest income/(expense) 7,268 Fixed-rate Interest income/(expense) (7,671) Total $ (11,232) $ 10,632 Nine Months Ended Interest rate contracts Interest income/(expense) $ (7,889) Fixed-rate debt Interest income/(expense) $ 8,193 Interest rate contracts Interest income/(expense) 159,397 Fixed-rate Interest income/(expense) (159,767) Total $ 151,508 $ (151,574) The effect of derivative instruments in cash flow hedging relationships on the consolidated statements of income were as follows: Three Months Ended Three Months Ended (dollars in thousands) 2023 2022 2023 2022 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ (15,574) $ (36,755) $ (5,960) $ (749) Nine Months Ended Nine Months Ended 2023 2022 2023 2022 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ 4,302 $ (49,679) $ 17,481 $ 139 Amounts reported in AOCI related to cash flow hedges will be reclassified to interest income or interest expense as interest payments are received or paid on Old National’s derivative instruments. During the next 12 months, we estimate that $5.8 million will be reclassified to interest income and $26.3 million will be reclassified to interest expense. Derivatives Not Designated as Hedges Commitments to fund certain mortgage loans (interest rate lock commitments) and forward commitments for the future delivery of mortgage loans to third party investors are considered derivatives. These derivative contracts do not qualify for hedge accounting. At September 30, 2023, the notional amounts of the interest rate lock commitments were $42.5 million and forward commitments were $54.7 million. At December 31, 2022, the notional amounts of the interest rate lock commitments were $21.4 million and forward commitments were $30.3 million. It is our practice to enter into forward commitments for the future delivery of residential mortgage loans to third party investors when interest rate lock commitments are entered into in order to economically hedge the effect of changes in interest rates resulting from our commitment to fund the loans. Old National also enters into derivative instruments for the benefit of its clients. The notional amounts of these customer derivative instruments and the offsetting counterparty derivative instruments were $5.8 billion at September 30, 2023 and $5.2 billion at December 31, 2022. These derivative contracts do not qualify for hedge accounting. These instruments include interest rate swaps, caps, and collars. Commonly, Old National will economically hedge significant exposures related to these derivative contracts entered into for the benefit of clients by entering into offsetting contracts with approved, reputable, independent counterparties with substantially matching terms. Old National enters into derivative financial instruments as part of its foreign currency risk management strategies. These derivative instruments consist of foreign currency forward contracts to accommodate the business needs of its clients. Old National does not designate these foreign currency forward contracts for hedge accounting treatment. The following table summarizes Old National’s derivatives not designated as hedges: September 30, 2023 December 31, 2022 Fair Value Fair Value (dollars in thousands) Notional Assets (1) Liabilities (2) Notional Assets (1) Liabilities (2) Interest rate lock commitments $ 42,492 $ — $ 146 $ 21,401 $ 93 $ — Forward mortgage loan contracts 54,730 1,031 — 30,330 32 — Customer interest rate swaps 5,775,638 1,208 379,864 5,220,363 5,676 326,924 Counterparty interest rate swaps (3) 5,775,634 222,907 1,213 5,220,363 151,111 5,711 Customer foreign currency contracts 13,234 218 156 8,341 253 42 Counterparty foreign currency contracts 12,970 255 141 8,297 72 168 Total $ 225,619 $ 381,520 $ 157,237 $ 332,845 (1) Derivative assets are included in other assets on the balance sheet. (2) Derivative liabilities are included in other liabilities on the balance sheet. (3) The fair values of certain counterparty interest rate swaps are zero due to the settlement of centrally cleared variation margin rules. The effect of derivatives not designated as hedging instruments on the consolidated statements of income were as follows: Three Months Ended (dollars in thousands) 2023 2022 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 426 $ 108 Mortgage contracts Mortgage banking revenue 391 638 Foreign currency contracts Other income/(expense) (3) 75 Total $ 814 $ 821 Nine Months Ended 2023 2022 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 1,125 $ 1,058 Mortgage contracts Mortgage banking revenue 760 (735) Foreign currency contracts Other income/(expense) (16) 113 Total $ 1,869 $ 436 (1) Includes the valuation differences between the customer and offsetting swaps.

Commitments, Contingencies, and

Commitments, Contingencies, and Financial Guarantees	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Financial Guarantees	COMMITMENTS, CONTINGENCIES, AND FINANCIAL GUARANTEES Litigation At September 30, 2023, there were certain legal proceedings pending against the Company and its subsidiaries in the ordinary course of business. While the outcome of any legal proceeding is inherently uncertain, based on information currently available, the Company’s management does not expect that any potential liabilities arising from pending legal matters will have a material adverse effect on the Company’s business, financial position, or results of operations. Credit-Related Financial Instruments Old National holds instruments, in the normal course of business with clients, that are considered financial guarantees and are recorded at fair value. Standby letters of credit guarantees are issued in connection with agreements made by clients to counterparties. Standby letters of credit are contingent upon failure of the client to perform the terms of the underlying contract. Credit risk associated with standby letters of credit is essentially the same as that associated with extending loans to clients and is subject to normal credit policies. The term of these standby letters of credit is typically one year or less. These commitments are not recorded in the consolidated financial statements. The following table summarizes Old National Bank’s unfunded loan commitments and standby letters of credit: (dollars in thousands) September 30, December 31, Unfunded loan commitments $ 9,142,538 $ 8,979,334 Standby letters of credit (1) 184,027 174,070 (1) Notional amount, which represents the maximum amount of future funding requirements. The carrying value was $1.2 million at September 30, 2023 and $0.8 million at December 31, 2022. At September 30, 2023, approximately 4% of the unfunded loan commitments had fixed rates, with the remainder having floating rates ranging from 0% to 23%. The allowance for unfunded loan commitments totaled $33.0 million at September 30, 2023 and $32.2 million at December 31, 2022. Old National is a party in risk participation transactions of interest rate swaps, which had total notional amounts of $522.5 million at September 30, 2023 and $398.9 million at December 31, 2022. Visa Class B Restricted Shares In 2008, Old National received Visa Class B restricted shares as part of Visa’s initial public offering. These shares are transferable only under limited circumstances until they can be converted into the publicly traded Class A common shares. This conversion will not occur until the final settlement of certain litigation for which Visa is indemnified by the holders of Visa’s Class B shares, including Old National. Visa funded an escrow account from its initial public offering to settle these litigation claims. Increases in litigation claims requiring Visa to fund the escrow account due to insufficient funds will result in a reduction of the conversion ratio of each Visa Class B share to unrestricted Class A shares. As of September 30, 2023, the conversion ratio was 1.5875. Based on the existing transfer restriction and the uncertainty of the outcome of the Visa litigation, the 65,466 Class B shares that Old National owns at September 30, 2023 are carried at a zero cost basis and are included in other assets with our equity securities that have no readily determinable fair value.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: • Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. • Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. • Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Old National used the following methods and significant assumptions to estimate the fair value of each type of financial instrument: Investment securities and equity securities : The fair values for investment securities and equity securities are determined by quoted market prices, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3). Discounted cash flows are calculated using swap and SOFR curves plus spreads that adjust for loss severities, volatility, credit risk, and optionality. During times when trading is more liquid, broker quotes are used (if available) to validate the model. Rating agency and industry research reports as well as defaults and deferrals on individual securities are reviewed and incorporated into the calculations. Loans held-for-sale : The fair value of loans held-for-sale is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan (Level 2). Derivative financial instruments : The fair values of derivative financial instruments are based on market quotes developed using observable inputs as of the valuation date (Level 2). Recurring Basis Assets and liabilities measured at fair value on a recurring basis, including financial assets and liabilities for which we have elected the fair value option, are summarized below: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 69,880 $ 69,880 $ — $ — Investment securities available-for-sale: U.S. Treasury 548,126 548,126 — — U.S. government-sponsored entities and agencies 1,142,900 — 1,142,900 — Mortgage-backed securities - Agency 3,862,705 — 3,862,705 — States and political subdivisions 544,944 — 544,944 — Pooled trust preferred securities 11,125 — 11,125 — Other securities 304,961 — 304,961 — Loans held-for-sale 122,033 — 122,033 — Derivative assets 227,833 — 227,833 — Financial Liabilities Derivative liabilities 409,269 — 409,269 — Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 52,507 $ 52,507 $ — $ — Investment securities available-for-sale: U.S. Treasury 200,927 200,927 — — U.S. government-sponsored entities and agencies 1,175,080 — 1,175,080 — Mortgage-backed securities - Agency 4,369,902 — 4,369,902 — States and political subdivisions 663,852 — 663,852 — Pooled trust preferred securities 10,811 — 10,811 — Other securities 353,140 — 353,140 — Loans held-for-sale 11,926 — 11,926 — Derivative assets 169,001 — 169,001 — Financial Liabilities Derivative liabilities 380,704 — 380,704 — Non-Recurring Basis Assets measured at fair value at September 30, 2023 on a non-recurring basis are summarized below: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 10,783 $ — $ — $ 10,783 Commercial real estate loans 75,720 — — 75,720 Foreclosed Assets: Commercial 1,879 — — 1,879 Commercial and commercial real estate loans that are deemed collateral dependent are valued using the discounted cash flows. The liquidation amounts are based on the fair value of the underlying collateral using the most recently available appraisals with certain adjustments made based on the type of property, age of appraisal, current status of the property, and other related factors to estimate the current value of the collateral. These commercial and commercial real estate loans had a principal amount of $117.5 million, with a valuation allowance of $31.0 million at September 30, 2023. Old National recorded provision expense associated with these loans totaling $2.1 million and $21.9 million for the three and nine months ended September 30, 2023, respectively. Old National recorded provision expense associated with commercial and commercial real estate loans that were deemed collateral dependent totaling $7.3 million and $20.1 million for the three and nine months ended September 30, 2022, respectively. Other real estate owned and other repossessed property is measured at fair value less costs to sell on a non-recurring basis and had a net carrying amount of $1.9 million at September 30, 2023. There were $26 thousand of write-downs on other real estate owned for the three months ended September 30, 2023 and $0.1 million for nine months ended September 30, 2023. There were write-downs totaling $0.2 million and $0.6 million for the three and nine months ended September 30, 2022, respectively. Loan servicing rights are evaluated for impairment based upon the fair value of the rights as compared to the carrying amount. If the carrying amount of an individual tranche exceeds fair value, impairment is recorded on that tranche so that the servicing asset is carried at fair value. Fair value is determined at a tranche level, based on market prices for comparable mortgage servicing contracts when available, or alternatively based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model utilizes a discount rate, weighted average prepayment speed, and other economic factors that market participants would use in estimating future net servicing income and that can be validated against available market data (Level 2). There was no valuation allowance for loan servicing rights with impairments at September 30, 2023 and no impairments or recoveries recorded during the three or nine months ended September 30, 2023. Old National recorded immaterial recoveries associated with loan servicing rights during the three and nine months ended September 30, 2022. Assets measured at fair value at December 31, 2022 on a non-recurring basis are summarized below: Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 22,562 $ — $ — $ 22,562 Commercial real estate loans 48,026 — — 48,026 At December 31, 2022, commercial and commercial real estate loans that are deemed collateral dependent had a principal amount of $92.0 million, with a valuation allowance of $21.5 million. The table below provides quantitative information about significant unobservable inputs used in fair value measurements within Level 3 of the fair value hierarchy: (dollars in thousands) Fair Value Valuation Techniques Unobservable Input Range (Weighted Average) (1) September 30, 2023 Collateral Dependent Loans Commercial loans $ 10,783 Discounted Discount for type of property, 10% - 40% (33%) cash flow age of appraisal, and current status Commercial real estate loans 75,720 Discounted Discount for type of property, 1% - 38% (17%) cash flow age of appraisal, and current status Foreclosed Assets Commercial real estate 1,879 Fair value of Discount for type of property, 4% - 17% (6%) collateral age of appraisal, and current status December 31, 2022 Collateral Dependent Loans Commercial loans $ 22,562 Discounted Discount for type of property, 10% - 47% (28%) cash flow age of appraisal, and current status Commercial real estate loans 48,026 Discounted Discount for type of property, 1% - 26% (11%) cash flow age of appraisal, and current status (1) Unobservable inputs were weighted by the relative fair value of the instruments. Fair Value Option Old National may elect to report most financial instruments and certain other items at fair value on an instrument-by-instrument basis with changes in fair value reported in net income. After the initial adoption, the election is made at the acquisition of an eligible financial asset, financial liability, or firm commitment or when certain specified reconsideration events occur. The fair value election may not be revoked once an election is made. Loans Held-For-Sale Old National has elected the fair value option for loans held-for-sale. For these loans, interest income is recorded in the consolidated statements of income based on the contractual amount of interest income earned on the financial assets (except any that are on nonaccrual status). None of these loans are 90 days or more past due, nor are any on nonaccrual status. Interest income for loans held-for-sale is included in the income statement totaling $0.4 million and $0.9 million for the three and nine months ended September 30, 2023, respectively, compared to $0.4 million and $1.6 million for the three and nine months ended September 30, 2022, respectively. Newly originated conforming fixed-rate and adjustable-rate first mortgage loans are intended for sale and are hedged with derivative instruments. Old National has elected the fair value option to mitigate accounting mismatches in cases where hedge accounting is complex and to achieve operational simplification. The fair value option was not elected for loans held for investment. The difference between the aggregate fair value and the aggregate remaining principal balance for loans for which the fair value option has been elected was as follows: (dollars in thousands) Aggregate Fair Value Difference Contractual Principal September 30, 2023 Loans held-for-sale $ 122,033 $ 72 $ 121,961 December 31, 2022 Loans held-for-sale $ 11,926 $ 221 $ 11,705 Accrued interest at period end is included in the fair value of the instruments. The following table presents the amount of gains and losses from fair value changes included in income before income taxes for financial assets carried at fair value: (dollars in thousands) Other Interest Income Interest (Expense) Total Changes Three Months Ended September 30, 2023 Loans held-for-sale $ (327) $ 12 $ — $ (315) Three Months Ended September 30, 2022 Loans held-for-sale $ (710) $ 1 $ — $ (709) Nine Months Ended September 30, 2023 Loans held-for-sale $ (151) $ 2 $ — $ (149) Nine Months Ended September 30, 2022 Loans held-for-sale $ (1,775) $ 7 $ — $ (1,768) Financial Instruments Not Carried at Fair Value The carrying amounts and estimated exit price fair values of financial instruments not carried at fair value were as follows: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 1,663,430 $ 1,663,430 $ — $ — Investment securities held-to-maturity: U.S. government-sponsored entities and agencies 824,223 — 617,010 — Mortgage-backed securities - Agency 1,043,585 — 847,652 — State and political subdivisions 1,160,106 — 928,959 — Loans, net: Commercial 9,207,028 — — 9,078,129 Commercial real estate 13,770,202 — — 13,302,502 Residential real estate 6,675,508 — — 5,630,855 Consumer credit 2,621,114 — — 2,526,277 Accrued interest receivable 209,503 1,093 45,597 162,813 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 10,091,352 $ 10,091,352 $ — $ — Checking, NOW, savings, and money market 21,585,620 21,585,620 — — Time deposits 5,575,704 — 5,527,361 — Federal funds purchased and interbank borrowings 918 918 — — Securities sold under agreements to repurchase 279,061 279,061 — — FHLB advances 4,412,576 — 4,167,911 — Other borrowings 863,455 — 843,629 — Accrued interest payable 46,934 — 46,934 — Standby letters of credit 1,224 — — 1,224 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 3,582 Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 728,412 $ 728,412 $ — $ — Investment securities held-to-maturity: U.S. government-sponsored entities and agencies 819,168 — 656,358 — Mortgage-backed securities - Agency 1,106,817 — 982,963 — State and political subdivisions 1,163,162 — 1,004,361 — Loans, net: Commercial 9,386,862 — — 9,066,583 Commercial real estate 12,317,825 — — 11,867,851 Residential real estate 6,438,525 — — 5,372,491 Consumer credit 2,676,758 — — 2,557,115 Accrued interest receivable 190,521 758 52,081 137,682 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 11,930,798 $ 11,930,798 $ — $ — Checking, NOW, savings, and money market 20,056,252 20,056,252 — — Time deposits 3,013,780 — 2,976,389 — Federal funds purchased and interbank borrowings 581,489 581,489 — — Securities sold under agreements to repurchase 432,804 432,804 — — FHLB advances 3,829,018 — 3,739,780 — Other borrowings 743,003 — 703,156 — Accrued interest payable 19,547 — 19,547 — Standby letters of credit 755 — — 755 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 3,666 The methods utilized to measure the fair value of financial instruments at September 30, 2023 and December 31, 2022 represent an approximation of exit price, however, an actual exit price may differ.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income (loss)	$ 147,876	$ 155,036	$ 146,600	$ 140,153	$ 114,985	$ (27,586)	$ 449,512	$ 227,552

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements include the accounts of Old National Bancorp and its wholly-owned subsidiaries (hereinafter collectively referred to as “Old National”) and have been prepared in conformity with accounting principles generally accepted in the United States of America and prevailing practices within the banking industry. Such principles require management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and the disclosures of contingent assets and liabilities at the date of the financial statements and amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, the consolidated financial statements contain all the normal and recurring adjustments necessary for a fair statement of the financial position of Old National as of September 30, 2023 and December 31, 2022, and the results of its operations for the three and nine months ended September 30, 2023 and 2022. Interim results do not necessarily represent annual results. Certain information and disclosures normally included in notes to consolidated annual financial statements prepared in accordance with GAAP have been condensed or omitted in this Quarterly Report on Form 10-Q pursuant to SEC rules and regulations. These financial statements should be read in conjunction with Old National’s Annual Report on Form 10-K for the year ended December 31, 2022. All intercompany transactions and balances have been eliminated. Certain prior year amounts have been reclassified to conform to the current presentation. Such reclassifications had no effect on prior period net income or shareholders’ equity and were insignificant amounts.
Financial Difficulty Modifications	Financial Difficulty Modifications Any loans that are modified are reviewed by Old National to identify if a financial difficulty modification has occurred, which is when Old National Bank modifies a loan related to a borrower experiencing financial difficulties. Terms may be modified to fit the ability of the borrower to repay in line with its current financial status. The modification of the terms of such loans includes one or a combination of the following: a reduction of the stated interest rate of the loan, an extension of the maturity date, a permanent reduction of the recorded investment of the loan, or an other-than-insignificant payment delay. The adoption of ASU 2022-02 on January 1, 2023 eliminated the recognition and measurement of TDRs and enhanced disclosures for modifications to loans related to borrowers experiencing financial difficulties. See Note 2 to the consolidated financial statements for additional detail regarding the adoption of ASU 2022-02. Other than the changes for financial difficulty modifications, there have been no material changes from the significant accounting policies disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2023 FASB ASC 805 – In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities From Contracts With Customers , to address diversity in practice and inconsistency related to the accounting for revenue contracts with customers acquired in a business combination. The amendments require that the acquirer recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606. At the acquisition date, an acquirer should account for the related revenue contracts in accordance with Topic 606 as if it had originated the contracts. The ASU also provides certain practical expedients for acquirers when recognizing and measuring acquired contract assets and liabilities. The amendments in this update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. Entities should apply the amendments prospectively to business combinations that occur after the effective date. The adoption of this guidance on January 1, 2023 did not have a material impact on the consolidated financial statements. FASB ASC 815 – In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method , to expand the current single-layer method of electing hedge accounting to allow multiple hedged layers of a single closed portfolio under the method and rename the last-of-layer method the portfolio layer method. The amendments in this update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The adoption of this guidance on January 1, 2023 did not have a material impact on the consolidated financial statements. FASB ASC 326 – In March 2022, the FASB issued ASU 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures , to eliminate the TDR recognition and measurement guidance and, instead, require that an entity evaluate (consistent with the accounting for other loan modifications) whether the modification represents a new loan or a continuation of an existing loan. The amendments also enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. The amendments require that an entity disclose current-period gross charge-offs by year of origination for financing receivables and net investment in leases within the vintage disclosures required by ASC 326. The amendments in this update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Old National adopted the provision in ASU 2022-02 related to the recognition and measurement of TDRs on a prospective basis on January 1, 2023, which did not have a material impact on the consolidated financial statements. FASB ASC 848 – In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from LIBOR or other interbank offered rate on financial reporting. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. In December 2022, the FASB issued ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 , which defers the sunset date of relief provisions within Topic 848 from December 31, 2022 to December 31, 2024. The objective of the guidance in Topic 848 is to provide relief during the transition period. The amendments in this ASU are effective March 12, 2020 through December 31, 2024. Old National believes the adoption of this guidance on activities subsequent to September 30, 2023 will not have a material impact on the consolidated financial statements. Accounting Guidance Pending Adoption FASB ASC 820 – In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions , to clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Early adoption is permitted. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 842 – In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842): Common Control Arrangements , which requires all entities to amortize leasehold improvements associated with common control leases over the useful life to the common control group. This ASU is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been made available for issuance. If an entity adopts the amendments in an interim period, it must adopt them as of the beginning of the fiscal year that includes that interim period. Transition can be done either retrospectively or prospectively. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 323 – In March 2023, the FASB issued ASU 2023-02, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method , which allows reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. This ASU is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for all entities in any interim period. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Summary of Table Reconciling Basic and Diluted Net Income Per Share	The following table presents the calculation of basic and diluted net income per common share: Three Months Ended Nine Months Ended (dollars and shares in thousands, except per share data) 2023 2022 2023 2022 Net income $ 147,876 $ 140,153 $ 449,512 $ 227,552 Preferred dividends (4,034) (4,034) (12,101) (10,084) Net income applicable to common shares $ 143,842 $ 136,119 $ 437,411 $ 217,468 Weighted average common shares outstanding: Weighted average common shares outstanding (basic) 290,648 290,961 290,763 269,843 Effect of dilutive securities: Restricted stock 1,069 1,516 1,045 1,273 Stock appreciation rights — 6 1 7 Weighted average diluted shares outstanding 291,717 292,483 291,809 271,123 Basic Net Income Per Common Share $ 0.49 $ 0.47 $ 1.50 $ 0.81 Diluted Net Income Per Common Share $ 0.49 $ 0.47 $ 1.50 $ 0.80

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Fair Value of Available-for-Sale Investment Securities Portfolio	The following table summarizes the amortized cost and fair value of the available-for-sale and held-to-maturity investment securities portfolios and the corresponding amounts of gross unrealized gains, unrealized losses, and basis adjustments in AOCI and gross unrecognized gains and losses. (dollars in thousands) Amortized Unrealized Unrealized Basis Adjustments (1) Fair September 30, 2023 Available-for-Sale U.S. Treasury $ 616,608 $ 98 $ (10,258) $ (58,322) $ 548,126 U.S. government-sponsored entities and agencies 1,475,307 — (229,113) (103,294) 1,142,900 Mortgage-backed securities - Agency 4,686,448 17 (823,760) — 3,862,705 States and political subdivisions 592,495 7 (47,058) (500) 544,944 Pooled trust preferred securities 13,794 — (2,669) — 11,125 Other securities 335,292 112 (30,443) — 304,961 Total available-for-sale securities $ 7,719,944 $ 234 $ (1,143,301) $ (162,116) $ 6,414,761 Held-to-Maturity U.S. government-sponsored entities and agencies $ 824,223 $ — $ (207,213) $ — $ 617,010 Mortgage-backed securities - Agency 1,043,585 — (195,933) — 847,652 States and political subdivisions 1,160,256 — (231,147) — 929,109 Allowance for securities held-to-maturity (150) — — — (150) Total held-to-maturity securities $ 3,027,914 $ — $ (634,293) $ — $ 2,393,621 December 31, 2022 Available-for-Sale U.S. Treasury $ 253,148 $ 5 $ (5,189) $ (47,037) $ 200,927 U.S. government-sponsored entities and agencies 1,451,736 — (169,248) (107,408) 1,175,080 Mortgage-backed securities - Agency 4,986,354 976 (617,428) — 4,369,902 States and political subdivisions 688,159 1,789 (26,096) — 663,852 Pooled trust preferred securities 13,783 — (2,972) — 10,811 Other securities 379,423 258 (26,541) — 353,140 Total available-for-sale securities $ 7,772,603 $ 3,028 $ (847,474) $ (154,445) $ 6,773,712 Held-to-Maturity U.S. government-sponsored entities and agencies $ 819,168 $ — $ (162,810) $ — $ 656,358 Mortgage-backed securities - Agency 1,106,817 — (123,854) — 982,963 States and political subdivisions 1,163,312 221 (159,022) — 1,004,511 Allowance for securities held-to-maturity (150) — — — (150) Total held-to-maturity securities $ 3,089,147 $ 221 $ (445,686) $ — $ 2,643,682 (1) Basis adjustments represent the cumulative amount of fair value hedging adjustments included in the carrying amounts of fixed-rate investment securities assets designated in fair value hedging arrangements. See Note 15 to the consolidated financial statements for additional information regarding these derivative financial instruments.
Schedule of Proceeds from Sales or Calls and Realized Gain and Losses of Available-for-Sale Investment Securities and Other Securities	Proceeds from sales or calls of available-for-sale investment securities and the resulting realized gains and realized losses were as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Proceeds $ 28,531 $ 5,221 $ 111,419 $ 78,568 Realized gains 54 17 1,002 528 Realized losses (295) (189) (6,442) (443)
Expected Maturities of Investment Securities Portfolio	Weighted average yield is based on amortized cost. September 30, 2023 (dollars in thousands) Amortized Fair Weighted Maturity Available-for-Sale Within one year $ 539,157 $ 535,193 4.71 % One to five years 1,567,565 1,395,867 2.80 Five to ten years 3,987,461 3,285,183 2.37 Beyond ten years 1,625,761 1,198,518 2.46 Total $ 7,719,944 $ 6,414,761 2.64 % Held-to-Maturity One to five years $ 161,837 $ 127,716 2.68 % Five to ten years 954,756 797,284 2.64 Beyond ten years 1,911,321 1,468,621 2.71 Total $ 3,027,914 $ 2,393,621 2.69 %
Available-for-Sale and Held-to-Maturity Investment Securities with Unrealized Losses by Aggregated Major Security Type and Length of Time in Continuous Unrealized Loss Position	The following table summarizes the available-for-sale investment securities with unrealized losses for which an allowance for credit losses has not been recorded by aggregated major security type and length of time in a continuous unrealized loss position: Less than 12 months 12 months or longer Total (dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Losses September 30, 2023 Available-for-Sale U.S. Treasury $ 37,492 $ (144) $ 178,540 $ (10,114) $ 216,032 $ (10,258) U.S. government-sponsored entities 32,821 (58) 1,110,079 (229,055) 1,142,900 (229,113) Mortgage-backed securities - Agency 124,895 (5,798) 3,736,306 (817,962) 3,861,201 (823,760) States and political subdivisions 258,362 (7,749) 260,563 (39,309) 518,925 (47,058) Pooled trust preferred securities — — 11,125 (2,669) 11,125 (2,669) Other securities 11,737 (323) 262,912 (30,120) 274,649 (30,443) Total available-for-sale $ 465,307 $ (14,072) $ 5,559,525 $ (1,129,229) $ 6,024,832 $ (1,143,301) December 31, 2022 Available-for-Sale U.S. Treasury $ 130,967 $ (3,264) $ 66,992 $ (1,925) $ 197,959 $ (5,189) U.S. government-sponsored entities 454,854 (75,795) 720,226 (93,453) 1,175,080 (169,248) Mortgage-backed securities - Agency 3,207,319 (358,507) 1,116,205 (258,921) 4,323,524 (617,428) States and political subdivisions 414,813 (25,555) 2,703 (541) 417,516 (26,096) Pooled trust preferred securities — — 10,811 (2,972) 10,811 (2,972) Other securities 257,775 (17,045) 75,309 (9,496) 333,084 (26,541) Total available-for-sale $ 4,465,728 $ (480,166) $ 1,992,246 $ (367,308) $ 6,457,974 $ (847,474)
Schedule of Held-to-Maturity Investment Securities with Unrecognized Losses	The following table summarizes the held-to-maturity investment securities with unrecognized losses aggregated by major security type and length of time in a continuous loss position: Less than 12 months 12 months or longer Total (dollars in thousands) Fair Unrecognized Fair Unrecognized Fair Unrecognized September 30, 2023 Held-to-Maturity U.S. government-sponsored entities $ — $ — $ 617,010 $ (207,213) $ 617,010 $ (207,213) Mortgage-backed securities - Agency — — 847,652 (195,933) 847,652 (195,933) States and political subdivisions 64,441 (4,877) 864,668 (226,270) 929,109 (231,147) Total held-to-maturity $ 64,441 $ (4,877) $ 2,329,330 $ (629,416) $ 2,393,771 $ (634,293) December 31, 2022 Held-to-Maturity U.S. government-sponsored entities $ 354,293 $ (110,523) $ 302,066 $ (52,287) $ 656,359 $ (162,810) Mortgage-backed securities - Agency 367,849 (42,438) 615,114 (81,416) 982,963 (123,854) States and political subdivisions 838,689 (127,355) 135,573 (31,667) 974,262 (159,022) Total held-to-maturity $ 1,560,831 $ (280,316) $ 1,052,753 $ (165,370) $ 2,613,584 $ (445,686)

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Schedule of Composition of Loans and Impact of Adoption	The portfolio segment reclassifications follow: Balance Sheet Portfolio After (dollars in thousands) September 30, 2023 Loans: Commercial $ 9,333,448 $ (226,353) $ 9,107,095 Commercial real estate 13,916,221 (165,593) 13,750,628 BBCC N/A 391,946 391,946 Residential real estate 6,696,288 — 6,696,288 Consumer 2,631,877 (2,631,877) N/A Indirect N/A 1,047,224 1,047,224 Direct N/A 542,689 542,689 Home equity N/A 1,041,964 1,041,964 Total $ 32,577,834 $ — $ 32,577,834 December 31, 2022 Loans: Commercial $ 9,508,904 $ (210,280) $ 9,298,624 Commercial real estate 12,457,070 (158,322) 12,298,748 BBCC N/A 368,602 368,602 Residential real estate 6,460,441 — 6,460,441 Consumer 2,697,226 (2,697,226) N/A Indirect N/A 1,034,257 1,034,257 Direct N/A 629,186 629,186 Home equity N/A 1,033,783 1,033,783 Total $ 31,123,641 $ — $ 31,123,641
Schedule of Composition of Loans	The composition of loans by portfolio segment follows: (dollars in thousands) September 30, December 31, Commercial (1) $ 9,107,095 $ 9,298,624 Commercial real estate 13,750,628 12,298,748 BBCC 391,946 368,602 Residential real estate 6,696,288 6,460,441 Indirect 1,047,224 1,034,257 Direct 542,689 629,186 Home equity 1,041,964 1,033,783 Total loans 32,577,834 31,123,641 Allowance for credit losses on loans (303,982) (303,671) Net loans $ 32,273,852 $ 30,819,970 (1) Includes direct finance leases of $173.0 million at September 30, 2023 and $188.1 million at December 31, 2022.
Schedule of Activity in Allowance for Loan Losses	Old National’s activity in the allowance for credit losses on loans by portfolio segment was as follows: (dollars in thousands) Balance at Allowance Charge-offs Recoveries Provision Balance at Three Months Ended Commercial $ 127,403 $ — $ (16,705) $ 1,616 $ 12,441 $ 124,755 Commercial real estate 136,897 — (2,291) 102 10,267 144,975 BBCC 2,776 — (1,049) 70 912 2,709 Residential real estate 20,421 — (15) 28 346 20,780 Indirect 1,407 — (490) 325 79 1,321 Direct 4,755 — (2,180) 580 416 3,571 Home equity 6,896 — (20) 341 (1,346) 5,871 Total $ 300,555 $ — $ (22,750) $ 3,062 $ 23,115 $ 303,982 Three Months Ended Commercial $ 102,819 $ 3,740 $ (2,696) $ 2,206 $ 6,344 $ 112,413 Commercial real estate 141,802 6,818 (4,772) 287 (45) 144,090 BBCC 2,064 — — 108 (4) 2,168 Residential real estate 19,729 — (20) 66 1,481 21,256 Indirect 1,641 — (624) 379 189 1,585 Direct 14,412 — (3,299) 442 4,541 16,096 Home equity 5,536 — (29) 357 (1,218) 4,646 Total $ 288,003 $ 10,558 $ (11,440) $ 3,845 $ 11,288 $ 302,254 Nine Months Ended Commercial $ 120,612 $ — $ (37,459) $ 3,713 $ 37,889 $ 124,755 Commercial real estate 138,244 — (5,938) 1,394 11,275 144,975 BBCC 2,431 — (1,171) 174 1,275 2,709 Residential real estate 21,916 — (256) 153 (1,033) 20,780 Indirect 1,532 — (2,089) 1,349 529 1,321 Direct 12,116 — (8,018) 1,798 (2,325) 3,571 Home equity 6,820 — (330) 471 (1,090) 5,871 Total $ 303,671 $ — $ (55,261) $ 9,052 $ 46,520 $ 303,982 Nine Months Ended Commercial $ 27,232 $ 38,780 $ (5,919) $ 3,219 $ 49,101 $ 112,413 Commercial real estate 64,004 49,419 (5,596) 789 35,474 144,090 BBCC 2,458 — (48) 256 (498) 2,168 Residential real estate 9,347 136 (344) 636 11,481 21,256 Indirect 1,743 — (1,636) 921 557 1,585 Direct 528 31 (6,550) 1,712 20,375 16,096 Home equity 2,029 723 (107) 540 1,461 4,646 Total $ 107,341 $ 89,089 $ (20,200) $ 8,073 $ 117,951 $ 302,254 Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Allowance for credit losses on unfunded loan commitments: Balance at beginning of period $ 37,007 $ 21,966 $ 32,188 $ 10,879 Provision for credit losses on unfunded loan commitments — — — 11,013 (Recapture of) provision for credit losses on unfunded loan (4,047) 4,203 772 4,277 Balance at end of period $ 32,960 $ 26,169 $ 32,960 $ 26,169
Schedule of Risk Category of Loans and Amortized Cost	The following table summarizes the amortized cost of term loans by risk category of commercial, commercial real estate, and BBCC loans by loan portfolio segment, class of loan, and origination year: (dollars in thousands) Origination Year Revolving to Term 2023 2022 2021 2020 2019 Prior Revolving Total September 30, 2023 Commercial: Pass $ 1,615,716 $ 1,690,168 $ 1,095,758 $ 553,187 $ 479,907 $ 501,610 $ 2,000,147 $ 454,995 $ 8,391,488 Criticized 27,469 110,893 21,107 46,241 22,674 54,738 107,105 32,247 422,474 Classified: Substandard 19,509 40,694 32,135 38,892 9,970 20,431 66,977 15,417 244,025 Nonaccrual — 5,748 2,034 284 2,718 — — — 10,784 Doubtful — 18,838 5,626 1,762 962 11,136 — — 38,324 Total $ 1,662,694 $ 1,866,341 $ 1,156,660 $ 640,366 $ 516,231 $ 587,915 $ 2,174,229 $ 502,659 $ 9,107,095 Commercial real estate: Pass $ 1,805,852 $ 3,432,536 $ 2,715,562 $ 1,734,359 $ 1,117,895 $ 1,273,742 $ 73,590 $ 796,442 $ 12,949,978 Criticized 58,440 62,461 42,128 28,716 27,978 90,549 9,959 21,023 341,254 Classified: Substandard 21,214 84,269 23,589 16,822 78,165 41,313 — 50,424 315,796 Nonaccrual — 2,983 11,470 1,428 52 11,385 — 792 28,110 Doubtful — 1,649 33,564 4,142 38,199 37,936 — — 115,490 Total $ 1,885,506 $ 3,583,898 $ 2,826,313 $ 1,785,467 $ 1,262,289 $ 1,454,925 $ 83,549 $ 868,681 $ 13,750,628 BBCC: Pass $ 74,658 $ 76,281 $ 49,463 $ 42,980 $ 30,085 $ 14,488 $ 66,281 $ 18,582 $ 372,818 Criticized 2,295 2,469 1,114 76 1,110 — 2,470 2,264 11,798 Classified: Substandard 98 733 619 24 401 1,196 100 438 3,609 Nonaccrual 216 451 310 340 — 87 477 278 2,159 Doubtful — 865 492 50 67 88 — — 1,562 Total $ 77,267 $ 80,799 $ 51,998 $ 43,470 $ 31,663 $ 15,859 $ 69,328 $ 21,562 $ 391,946 (dollars in thousands) Origination Year Revolving to Term 2022 2021 2020 2019 2018 Prior Revolving Total December 31, 2022 Commercial: Pass $ 2,388,618 $ 1,754,364 $ 796,340 $ 738,208 $ 362,986 $ 388,617 $ 1,988,763 $ 329,119 $ 8,747,015 Criticized 40,856 30,661 63,557 33,490 9,195 5,312 61,036 4,327 248,434 Classified: Substandard 37,223 47,522 16,540 22,925 4,844 21,204 67,402 25,143 242,803 Nonaccrual 3,627 1,453 566 — — — 1,634 6,623 13,903 Doubtful 2,821 17,604 3,720 8,005 5,968 8,351 — — 46,469 Total $ 2,473,145 $ 1,851,604 $ 880,723 $ 802,628 $ 382,993 $ 423,484 $ 2,118,835 $ 365,212 $ 9,298,624 Commercial real estate: Pass $ 3,066,960 $ 2,828,758 $ 1,989,000 $ 1,219,025 $ 675,572 $ 1,018,719 $ 57,818 $ 689,553 $ 11,545,405 Criticized 75,306 34,422 22,569 82,637 86,504 56,864 — 23,282 381,584 Classified: Substandard 46,231 16,928 24,319 78,468 57,824 21,591 — 4,108 249,469 Nonaccrual 3,151 9,541 5,014 — 2,312 22,155 — 3,257 45,430 Doubtful 1,934 38,386 10,011 4,605 1,523 20,401 — — 76,860 Total $ 3,193,582 $ 2,928,035 $ 2,050,913 $ 1,384,735 $ 823,735 $ 1,139,730 $ 57,818 $ 720,200 $ 12,298,748 BBCC: Pass $ 90,341 $ 64,161 $ 52,304 $ 36,868 $ 23,618 $ 11,333 $ 60,016 $ 18,881 $ 357,522 Criticized 1,504 525 368 692 353 — 1,006 1,603 6,051 Classified: Substandard 811 143 — 421 — — 543 682 2,600 Nonaccrual 42 37 118 — 429 284 — 639 1,549 Doubtful 40 107 439 157 64 73 — — 880 Total $ 92,738 $ 64,973 $ 53,229 $ 38,138 $ 24,464 $ 11,690 $ 61,565 $ 21,805 $ 368,602 Origination Year Revolving to Term (dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Total September 30, 2023 Residential real estate: Risk Rating: Performing $ 362,518 $ 1,504,933 $ 1,861,729 $ 1,732,039 $ 444,411 $ 750,037 $ — $ 279 $ 6,655,946 Nonperforming — 3,529 2,905 4,538 3,343 26,027 — — 40,342 Total $ 362,518 $ 1,508,462 $ 1,864,634 $ 1,736,577 $ 447,754 $ 776,064 $ — $ 279 $ 6,696,288 Indirect: Risk Rating: Performing $ 309,220 $ 390,012 $ 181,235 $ 96,148 $ 46,877 $ 19,666 $ — $ 196 $ 1,043,354 Nonperforming 120 1,270 1,175 604 361 340 — — 3,870 Total $ 309,340 $ 391,282 $ 182,410 $ 96,752 $ 47,238 $ 20,006 $ — $ 196 $ 1,047,224 Direct: Risk Rating: Performing $ 84,749 $ 99,625 $ 107,539 $ 54,070 $ 35,065 $ 87,207 $ 63,877 $ 4,852 $ 536,984 Nonperforming 87 486 522 403 316 3,874 6 11 5,705 Total $ 84,836 $ 100,111 $ 108,061 $ 54,473 $ 35,381 $ 91,081 $ 63,883 $ 4,863 $ 542,689 Home equity: Risk Rating: Performing $ 1 $ 692 $ 387 $ 690 $ 743 $ 5,736 $ 994,797 $ 23,918 $ 1,026,964 Nonperforming — 24 219 203 758 4,810 1,692 7,294 15,000 Total $ 1 $ 716 $ 606 $ 893 $ 1,501 $ 10,546 $ 996,489 $ 31,212 $ 1,041,964 Origination Year Revolving to Term 2022 2021 2020 2019 2018 Prior Revolving Total December 31, 2022 Residential real estate: Risk Rating: Performing $ 1,327,168 $ 1,945,792 $ 1,825,762 $ 478,529 $ 136,260 $ 712,175 $ 7 $ 88 $ 6,425,781 Nonperforming 59 529 861 873 1,826 30,512 — — 34,660 Total $ 1,327,227 $ 1,946,321 $ 1,826,623 $ 479,402 $ 138,086 $ 742,687 $ 7 $ 88 $ 6,460,441 Indirect: Risk Rating: Performing $ 504,410 $ 249,407 $ 144,265 $ 82,304 $ 31,484 $ 19,095 $ — $ 62 $ 1,031,027 Nonperforming 348 1,074 645 531 304 328 — — 3,230 Total $ 504,758 $ 250,481 $ 144,910 $ 82,835 $ 31,788 $ 19,423 $ — $ 62 $ 1,034,257 Direct: Risk Rating: Performing $ 132,934 $ 164,126 $ 77,406 $ 57,919 $ 45,299 $ 59,212 $ 87,622 $ 671 $ 625,189 Nonperforming 115 851 614 205 327 1,526 5 354 3,997 Total $ 133,049 $ 164,977 $ 78,020 $ 58,124 $ 45,626 $ 60,738 $ 87,627 $ 1,025 $ 629,186 Home equity: Risk Rating: Performing $ 919 $ 896 $ 1,849 $ 1,497 $ 983 $ 11,646 $ 990,001 $ 14,792 $ 1,022,583 Nonperforming 166 160 166 446 794 4,308 1,698 3,462 11,200 Total $ 1,085 $ 1,056 $ 2,015 $ 1,943 $ 1,777 $ 15,954 $ 991,699 $ 18,254 $ 1,033,783 The following table summarizes the gross charge-offs of loans by loan portfolio segment and origination year: Origination Year (dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Total Three Months Ended September 30, 2023 Commercial $ — $ 4,154 $ 12,271 $ — $ — $ 63 $ 217 $ 16,705 Commercial real estate — — — 1,744 — 547 — 2,291 BBCC 499 501 49 — — — — 1,049 Residential real estate — — — — — 15 — 15 Indirect 75 276 86 12 10 31 — 490 Direct 19 429 423 112 270 60 867 2,180 Home equity — — — — — 20 — 20 Total gross charge-offs $ 593 $ 5,360 $ 12,829 $ 1,868 $ 280 $ 736 $ 1,084 $ 22,750 Nine Months Ended September 30, 2023 Commercial $ — $ 6,254 $ 23,432 $ 120 $ 6,789 $ 302 $ 562 $ 37,459 Commercial real estate — 54 735 2,144 — 3,005 — 5,938 BBCC 499 548 77 47 — — — 1,171 Residential real estate — — — — — 256 — 256 Indirect 85 954 640 153 137 120 — 2,089 Direct 19 1,330 1,805 570 1,011 450 2,833 8,018 Home equity — — — — — 330 — 330 Total gross charge-offs $ 603 $ 9,140 $ 26,689 $ 3,034 $ 7,937 $ 4,463 $ 3,395 $ 55,261
Schedule of Past Due Financing Receivables	The following table presents the aging of the amortized cost basis in past due loans by class of loans: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2023 Commercial $ 2,754 $ 4,214 $ 12,504 $ 19,472 $ 9,087,623 $ 9,107,095 Commercial real estate 15,954 6,295 21,366 43,615 13,707,013 13,750,628 BBCC 1,273 511 712 2,496 389,450 391,946 Residential 29,762 6,784 12,733 49,279 6,647,009 6,696,288 Indirect 5,576 1,368 1,156 8,100 1,039,124 1,047,224 Direct 3,626 1,059 1,588 6,273 536,416 542,689 Home equity 5,840 1,808 6,077 13,725 1,028,239 1,041,964 Total $ 64,785 $ 22,039 $ 56,136 $ 142,960 $ 32,434,874 $ 32,577,834 December 31, 2022 Commercial $ 14,147 $ 4,801 $ 11,080 $ 30,028 $ 9,268,596 $ 9,298,624 Commercial real estate 47,240 1,312 32,892 81,444 12,217,304 12,298,748 BBCC 730 365 603 1,698 366,904 368,602 Residential 24,181 5,033 11,753 40,967 6,419,474 6,460,441 Indirect 6,302 2,118 958 9,378 1,024,879 1,034,257 Direct 5,404 2,118 1,928 9,450 619,736 629,186 Home equity 6,585 1,966 4,707 13,258 1,020,525 1,033,783 Total $ 104,589 $ 17,713 $ 63,921 $ 186,223 $ 30,937,418 $ 31,123,641
Schedule of Nonaccrual and Past Due Loans	The following table presents the amortized cost basis of loans on nonaccrual status and loans past due 90 days or more and still accruing by class of loan: September 30, 2023 December 31, 2022 (dollars in thousands) Nonaccrual Nonaccrual Past Due Nonaccrual Nonaccrual Past Due Commercial $ 49,108 $ 13,432 $ 577 $ 60,372 $ 7,873 $ 152 Commercial real estate 143,600 29,721 104 122,290 33,445 — BBCC 3,721 — — 2,429 — — Residential 40,342 — — 34,660 — 1,808 Indirect 3,870 — 54 3,230 — 28 Direct 5,705 — 109 3,997 — 133 Home equity 15,000 — 348 11,200 — 529 Total $ 261,346 $ 43,153 $ 1,192 $ 238,178 $ 41,318 $ 2,650 Type of Collateral (dollars in thousands) Real Blanket Investment Auto Other September 30, 2023 Commercial $ 13,635 $ 31,856 $ 466 $ 288 $ 347 Commercial real estate 131,826 — 1,205 — 6,184 BBCC 2,131 1,174 — 416 — Residential 40,342 — — — — Indirect — — — 3,870 — Direct 4,622 1 3 296 31 Home equity 15,000 — — — — Total loans $ 207,556 $ 33,031 $ 1,674 $ 4,870 $ 6,562 December 31, 2022 Commercial $ 8,962 $ 42,754 $ 2,690 $ 1,611 $ 980 Commercial real estate 108,871 — 1,718 — 6,411 BBCC 1,939 478 — 12 — Residential 34,660 — — — — Indirect — — — 3,230 — Direct 2,991 13 — 232 23 Home equity 11,200 — — — — Total loans $ 168,623 $ 43,245 $ 4,408 $ 5,085 $ 7,414
Schedule of Activity in Trouble Debt Restructurings	The following table presents the amortized cost basis of financial difficulty modifications at September 30, 2023 that were modified during the three and nine months ended September 30, 2023 by class of loans and type of modification: (dollars in thousands) Term Total Three Months Ended September 30, 2023 Commercial $ 3,502 0.0 % Commercial real estate 93,844 0.7 % Total $ 97,346 0.3 % Nine Months Ended September 30, 2023 Commercial $ 20,811 0.2 % Commercial real estate 116,580 0.8 % Total $ 137,391 0.4 % Old National closely monitors the performance of financial difficulty modifications to understand the effectiveness of its efforts. The following table presents the performance of loans identified as financial difficulty modifications at September 30, 2023: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2023 Commercial $ — $ — $ 2,541 $ 2,541 $ 18,270 $ 20,811 Commercial real estate 1,086 — — 1,086 115,494 116,580 Total $ 1,086 $ — $ 2,541 $ 3,627 $ 133,764 $ 137,391 The following table summarizes the nature of the financial difficulty modifications during the three and nine months ended September 30, 2023 by class of loans: (dollars in thousands) Weighted- Three Months Ended September 30, 2023 Commercial 7.3 Commercial real estate 9.2 Total 9.2 Nine Months Ended September 30, 2023 Commercial 5.7 Commercial real estate 8.9 Total 8.4

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense were as follows: Affected Line Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Operating lease cost Occupancy/Equipment expense $ 7,462 $ 7,657 $ 23,569 $ 21,323 Finance lease cost: Amortization of right-of-use assets Occupancy expense 742 680 2,170 2,003 Interest on lease liabilities Interest expense 183 105 536 315 Sub-lease income Occupancy expense (119) (87) (281) (389) Total $ 8,268 $ 8,355 $ 25,994 $ 23,252
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases was as follows: (dollars in thousands) September 30, December 31, Operating Leases Operating lease right-of-use assets $ 179,284 $ 189,714 Operating lease liabilities 199,937 211,964 Finance Leases Premises and equipment, net 20,571 10,799 Other borrowings 21,595 13,469 Weighted-Average Remaining Lease Term (in Years) Operating leases 8.5 9.1 Finance leases 10.6 7.2 Weighted-Average Discount Rate Operating leases 2.93 % 2.88 % Finance leases 3.89 % 3.30 %
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases was as follows: Nine Months Ended (dollars in thousands) 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 23,766 $ 22,223 Operating cash flows from finance leases 536 315 Financing cash flows from finance leases 1,893 1,839
Schedule of Maturity Analysis of Lease Liability by Lease Classification	The following table presents a maturity analysis of the Company’s lease liability by lease classification at September 30, 2023: (dollars in thousands) Operating Finance 2023 $ 7,959 $ 826 2024 31,183 3,357 2025 29,564 3,380 2026 28,622 2,154 2027 27,662 2,157 Thereafter 102,282 14,809 Total undiscounted lease payments 227,272 26,683 Amounts representing interest (27,335) (5,088) Lease liability $ 199,937 $ 21,595

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2023
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 Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Balance at beginning of period $ 1,998,716 $ 1,991,534 $ 1,998,716 $ 1,036,994 Acquisitions and adjustments — 11,065 — 965,605 Balance at end of period $ 1,998,716 $ 2,002,599 $ 1,998,716 $ 2,002,599
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 Accumulated Net September 30, 2023 Core deposit $ 143,511 $ (68,312) $ 75,199 Customer trust relationships 52,621 (19,701) 32,920 Total other intangible assets $ 196,132 $ (88,013) $ 108,119 December 31, 2022 Core deposit $ 170,642 $ (80,951) $ 89,691 Customer trust relationships 56,243 (19,529) 36,714 Total other intangible assets $ 226,885 $ (100,480) $ 126,405
Schedule of Estimated Amortization Expense for Future Years	Estimated amortization expense for future years is as follows: (dollars in thousands) 2023 remaining $ 5,869 2024 21,239 2025 18,358 2026 15,555 2027 12,867 Thereafter 34,231 Total $ 108,119

Qualified Affordable Housing _2

Qualified Affordable Housing Projects and Other Tax Credit Investments (Tables)	9 Months Ended
	Sep. 30, 2023
Investments in Affordable Housing Projects [Abstract]
Schedule of Qualified Affordable Housing Projects and Other Tax Credit Investments	The following table summarizes Old National’s investments in qualified affordable housing projects and other tax credit investments: (dollars in thousands) September 30, 2023 December 31, 2022 Investment Accounting Method Investment Unfunded Commitment (1) Investment Unfunded LIHTC Proportional amortization $ 93,214 $ 54,440 $ 84,428 $ 55,754 FHTC Equity 36,715 27,214 19,316 9,588 NMTC Consolidation 45,637 — 51,912 — Renewable Energy Equity 385 — 1,099 — Total $ 175,951 $ 81,654 $ 156,755 $ 65,342 (1) All commitments will be paid by Old National by December 31, 2027. The following table summarizes the amortization expense and tax benefit recognized for Old National’s qualified affordable housing projects and other tax credit investments: (dollars in thousands) Amortization Expense (1) Tax Expense (Benefit) Recognized (2) Three Months Ended September 30, 2023 LIHTC $ 3,208 $ (3,582) FHTC 330 (399) NMTC 2,092 (2,611) Renewable Energy 222 — Total $ 5,852 $ (6,592) Three Months Ended September 30, 2022 LIHTC $ 1,240 $ (1,650) FHTC 215 (262) NMTC 2,237 (2,788) Renewable Energy 210 — Total $ 3,902 $ (4,700) Nine Months Ended September 30, 2023 LIHTC $ 6,135 $ (7,398) FHTC 1,178 (1,423) NMTC 6,275 (7,833) Renewable Energy 714 — Total $ 14,302 $ (16,654) Nine Months Ended September 30, 2022 LIHTC $ 3,734 $ (4,950) FHTC 635 (776) NMTC 4,439 (5,538) Renewable Energy 629 — Total $ 9,437 $ (11,264) (1) The amortization expense for the LIHTC investments is included in our income tax expense. The amortization expense for the FHTC, NMTC, and Renewable Energy tax credits is included in noninterest expense. (2) All of the tax benefits recognized are included in our income tax expense. The tax benefit recognized for the FHTC, NMTC, and Renewable Energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) and deferred tax liability of the investments’ income (loss).

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2023
Securities Sold under Agreements to Repurchase [Abstract]
Schedule of Securities Sold Under Agreements to Repurchase and Weighted-Average Interest Rates	The following table presents securities sold under agreements to repurchase and related weighted-average interest rates: At or for the Nine Months Ended September 30, (dollars in thousands) 2023 2022 Outstanding at period end $ 279,061 $ 438,053 Average amount outstanding during the period 351,362 450,966 Maximum amount outstanding at any month-end during the period 430,537 509,275 Weighted-average interest rate: During the period 0.91 % 0.09 % At period end 1.35 % 0.40 %
Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements	The following table presents the contractual maturity of our secured borrowings and class of collateral pledged: At September 30, 2023 Remaining Contractual Maturity of the Agreements (dollars in thousands) Overnight and Continuous Up to 30-90 Days Greater Than 90 days Total Repurchase Agreements: U.S. Treasury and agency securities $ 279,061 $ — $ — $ — $ 279,061 Total $ 279,061 $ — $ — $ — $ 279,061

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	9 Months Ended
	Sep. 30, 2023
Federal Home Loan Banks [Abstract]
Summary of FHLB Advances	The following table summarizes Old National Bank’s FHLB advances: (dollars in thousands) September 30, December 31, FHLB advances (fixed rates 0.00% to 5.61% and variable rates 5.35% to 5.36%) maturing December 2023 to September 2042 $ 4,450,528 $ 3,850,677 Fair value hedge basis adjustments and unamortized (37,952) (21,659) Total $ 4,412,576 $ 3,829,018
Summary of Contractual Maturities of FHLB Advances	Contractual maturities of FHLB advances at September 30, 2023 were as follows: (dollars in thousands) Due in 2023 $ 100,000 Due in 2024 25,243 Due in 2025 550,285 Due in 2026 100,000 Thereafter 3,675,000 Fair value hedge basis adjustments and unamortized prepayment fees (37,952) Total $ 4,412,576

Other Borrowings (Tables)

Other Borrowings (Tables)	9 Months Ended
	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Summary of Other Borrowings	The following table summarizes Old National’s other borrowings: (dollars in thousands) September 30, December 31, Old National Bancorp: Senior unsecured notes (fixed rate 4.125%) maturing August 2024 $ 175,000 $ 175,000 Unamortized debt issuance costs related to senior unsecured notes (130) (247) Subordinated debentures (fixed rate 5.875%) maturing September 2026 150,000 150,000 Junior subordinated debentures (rates of 6.95% to 9.21%) maturing July 2031 to September 2037 136,643 136,643 Other basis adjustments 19,496 23,363 Old National Bank: Finance lease liabilities 21,595 13,469 Subordinated debentures (variable rate 9.99%) maturing October 2025 12,000 12,000 Leveraged loans for NMTC (fixed rates of 1.00% to 1.43%) maturing December 2046 to June 2060 143,745 143,187 Other (1) 205,106 89,588 Total other borrowings $ 863,455 $ 743,003 (1) Includes overnight borrowings to collateralize certain derivative positions totaling $204.5 million at September 30, 2023 and $88.0 million at December 31, 2022. The following table summarizes the terms of our outstanding junior subordinated debentures at September 30, 2023: (dollars in thousands) Rate at September 30, Name of Trust Issuance Date Issuance Rate Maturity Date Bridgeview Statutory Trust I July 2001 $ 15,464 3-month SOFR plus 3.58% 9.21% July 31, 2031 Bridgeview Capital Trust II December 2002 15,464 3-month SOFR plus 3.35% 8.92% January 7, 2033 First Midwest Capital Trust I November 2003 37,825 6.95% fixed 6.95% December 1, 2033 St. Joseph Capital Trust II March 2005 5,155 3-month SOFR plus 1.75% 7.42% March 17, 2035 Northern States Statutory Trust I September 2005 10,310 3-month SOFR plus 1.80% 7.47% September 15, 2035 Anchor Capital Trust III August 2005 5,000 3-month SOFR plus 1.55% 7.21% September 30, 2035 Great Lakes Statutory Trust II December 2005 6,186 3-month SOFR plus 1.40% 7.07% December 15, 2035 Home Federal Statutory September 2006 15,464 3-month SOFR plus 1.65% 7.32% September 15, 2036 Monroe Bancorp Capital July 2006 3,093 3-month SOFR plus 1.60% 7.17% October 7, 2036 Tower Capital Trust 3 December 2006 9,279 3-month SOFR plus 1.69% 7.36% March 1, 2037 Monroe Bancorp Statutory March 2007 5,155 3-month SOFR plus 1.60% 7.27% June 15, 2037 Great Lakes Statutory Trust III June 2007 8,248 3-month SOFR plus 1.70% 7.37% September 15, 2037 Total $ 136,643 The following table summarizes Old National Bank’s unfunded loan commitments and standby letters of credit: (dollars in thousands) September 30, December 31, Unfunded loan commitments $ 9,142,538 $ 8,979,334 Standby letters of credit (1) 184,027 174,070 (1) Notional amount, which represents the maximum amount of future funding requirements. The carrying value was $1.2 million at September 30, 2023 and $0.8 million at December 31, 2022.
Summary of Contractual Maturities of Other Borrowings	Contractual maturities of other borrowings at September 30, 2023 were as follows: (dollars in thousands) Due in 2023 $ 205,160 Due in 2024 177,653 Due in 2025 14,740 Due in 2026 151,576 Due in 2027 1,636 Thereafter 292,738 Unamortized debt issuance costs and other basis adjustments 19,952 Total $ 863,455

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Schedule of AOCI	The following table summarizes the changes within each classification of AOCI, net of tax: (dollars in thousands) Unrealized Unrealized Gains and Defined Total Three Months Ended September 30, 2023 Balance at beginning of period $ (701,393) $ (103,144) $ (4,096) $ — $ (808,633) Other comprehensive income (loss) before (156,660) — (11,546) — (168,206) Amounts reclassified from AOCI to income (1) 178 4,193 3,653 — 8,024 Balance at end of period $ (857,875) $ (98,951) $ (11,989) $ — $ (968,815) Three Months Ended September 30, 2022 Balance at beginning of period $ (437,075) $ (122,199) $ (9,875) $ 16 $ (569,133) Other comprehensive income (loss) before (217,401) — (27,725) — (245,126) Amounts reclassified from AOCI to income (1) 131 5,121 565 (8) 5,809 Balance at end of period $ (654,345) $ (117,078) $ (37,035) $ 8 $ (808,450) Nine Months Ended September 30, 2023 Balance at beginning of period $ (642,346) $ (112,664) $ (31,549) $ 137 $ (786,422) Other comprehensive income (loss) before (219,562) 1,325 34,279 — (183,958) Amounts reclassified from AOCI to income (1) 4,033 12,388 (14,719) (137) 1,565 Balance at end of period $ (857,875) $ (98,951) $ (11,989) $ — $ (968,815) Nine Months Ended September 30, 2022 Balance at beginning of period $ (2,950) $ — $ 543 $ 32 $ (2,375) Other comprehensive income (loss) before (651,330) (125,229) (37,473) — (814,032) Amounts reclassified from AOCI to income (1) (65) 8,151 (105) (24) 7,957 Balance at end of period $ (654,345) $ (117,078) $ (37,035) $ 8 $ (808,450) (1) See table below for details about reclassifications to income.
Reclassifications out of AOCI	The following table summarizes the amounts reclassified out of each component of AOCI for the three months ended September 30, 2023 and 2022: Three Months Ended (dollars in thousands) 2023 2022 Details about AOCI Components Amount Reclassified Affected Line Item in the Unrealized gains and losses on $ (241) $ (172) Debt securities gains (losses), net 63 41 Income tax (expense) benefit $ (178) $ (131) Net income (loss) Unrealized gains and losses on $ (5,623) $ (6,772) Interest income (expense) 1,430 1,651 Income tax (expense) benefit $ (4,193) $ (5,121) Net income (loss) Gains and losses on hedges $ (4,927) $ (749) Interest income (expense) 1,274 184 Income tax (expense) benefit $ (3,653) $ (565) Net income (loss) Amortization of defined benefit Actuarial gains (losses) $ — $ 11 Salaries and employee benefits — (3) Income tax (expense) benefit $ — $ 8 Net income (loss) Total reclassifications for the period $ (8,024) $ (5,809) Net income (loss) The following table summarizes the amounts reclassified out of each component of AOCI for the nine months ended September 30, 2023 and 2022: Nine Months Ended (dollars in thousands) 2023 2022 Details about AOCI Components Amount Reclassified Affected Line Item in the Unrealized gains and losses on $ (5,440) $ 85 Debt securities gains (losses), net 1,407 (20) Income tax (expense) benefit $ (4,033) $ 65 Net income (loss) Unrealized gains and losses on $ (16,574) $ (10,774) Interest income (expense) 4,186 2,623 Income tax (expense) benefit $ (12,388) $ (8,151) Net income (loss) Gains and losses on hedges $ 19,893 $ 139 Interest income (expense) (5,174) (34) Income tax (expense) benefit $ 14,719 $ 105 Net income (loss) Amortization of defined benefit Actuarial gains (losses) $ 182 $ 32 Salaries and employee benefits (45) (8) Income tax (expense) benefit $ 137 $ 24 Net income (loss) Total reclassifications for the period $ (1,565) $ (7,957) Net income (loss)

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Summary of Differences in Taxes from Continuing Operations Computed at Statutory Rate	Following is a summary of the major items comprising the differences in taxes from continuing operations computed at the federal statutory rate and as recorded in the consolidated statements of income: Three Months Ended Nine Months Ended (dollars in thousands) 2023 2022 2023 2022 Provision at statutory rate of 21% $ 40,358 $ 37,598 $ 122,352 $ 59,365 Tax-exempt income: Tax-exempt interest (4,625) (3,929) (13,716) (10,335) Section 291/265 interest disallowance 675 85 1,593 150 Company-owned life insurance income (743) (684) (2,315) (2,340) Tax-exempt income (4,693) (4,528) (14,438) (12,525) State income taxes 8,163 7,050 24,856 7,808 Interim period effective rate adjustment 116 (31) (607) 3,042 Tax credit investments - federal (2,071) (2,407) (7,122) (4,968) Officer compensation limitation 1,040 401 3,120 1,053 Non-deductible FDIC premiums 1,949 1,178 6,096 2,549 Other, net (558) (374) (1,139) (1,187) Income tax expense (benefit) $ 44,304 $ 38,887 $ 133,118 $ 55,137 Effective tax rate 23.1 % 21.7 % 22.9 % 19.5 %

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Interest Rate Derivatives	The following table summarizes Old National’s derivatives designated as hedges: September 30, 2023 December 31, 2022 Fair Value Fair Value (dollars in thousands) Notional Assets (1) Liabilities (2) Notional Assets (1) Liabilities (2) Cash flow hedges Interest rate collars and floors on loan pools $ 1,500,000 $ 2,214 $ 27,749 $ 1,900,000 $ 11,764 $ 47,859 Interest rate swaps on borrowings (3) 150,000 — — 150,000 — — Fair value hedges Interest rate swaps on investment securities (3) 998,107 — — 909,957 — — Interest rate swaps on borrowings (3) 700,000 — — 300,000 — — Total $ 2,214 $ 27,749 $ 11,764 $ 47,859 (1) Derivative assets are included in other assets on the balance sheet. (2) Derivative liabilities are included in other liabilities on the balance sheet. (3) The fair values of certain counterparty interest rate swaps are zero due to the settlement of centrally cleared variation margin rules.
Schedule of Derivative Instruments Effect on Consolidated Statement of Income	The effect of derivative instruments in fair value hedging relationships on the consolidated statements of income were as follows: (dollars in thousands) Gain (Loss) Derivatives in Location of Gain or Gain (Loss) Hedged Items Location of Gain or Three Months Ended September 30, 2023 Interest rate contracts Interest income/(expense) $ (9,553) Fixed-rate debt Interest income/(expense) $ 9,566 Interest rate contracts Interest income/(expense) 45,537 Fixed-rate Interest income/(expense) (46,055) Total $ 35,984 $ (36,489) Three Months Ended Interest rate contracts Interest income/(expense) $ (532) Fixed-rate debt Interest income/(expense) $ 638 Interest rate contracts Interest income/(expense) 47,963 Fixed-rate Interest income/(expense) (47,975) Total $ 47,431 $ (47,337) Nine Months Ended Interest rate contracts Interest income/(expense) $ (18,500) Fixed-rate debt Interest income/(expense) $ 18,303 Interest rate contracts Interest income/(expense) 7,268 Fixed-rate Interest income/(expense) (7,671) Total $ (11,232) $ 10,632 Nine Months Ended Interest rate contracts Interest income/(expense) $ (7,889) Fixed-rate debt Interest income/(expense) $ 8,193 Interest rate contracts Interest income/(expense) 159,397 Fixed-rate Interest income/(expense) (159,767) Total $ 151,508 $ (151,574) The effect of derivative instruments in cash flow hedging relationships on the consolidated statements of income were as follows: Three Months Ended Three Months Ended (dollars in thousands) 2023 2022 2023 2022 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ (15,574) $ (36,755) $ (5,960) $ (749) Nine Months Ended Nine Months Ended 2023 2022 2023 2022 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ 4,302 $ (49,679) $ 17,481 $ 139 The effect of derivatives not designated as hedging instruments on the consolidated statements of income were as follows: Three Months Ended (dollars in thousands) 2023 2022 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 426 $ 108 Mortgage contracts Mortgage banking revenue 391 638 Foreign currency contracts Other income/(expense) (3) 75 Total $ 814 $ 821 Nine Months Ended 2023 2022 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 1,125 $ 1,058 Mortgage contracts Mortgage banking revenue 760 (735) Foreign currency contracts Other income/(expense) (16) 113 Total $ 1,869 $ 436 (1) Includes the valuation differences between the customer and offsetting swaps.
Summary of Derivatives Not Designated as Hedging Instruments	The following table summarizes Old National’s derivatives not designated as hedges: September 30, 2023 December 31, 2022 Fair Value Fair Value (dollars in thousands) Notional Assets (1) Liabilities (2) Notional Assets (1) Liabilities (2) Interest rate lock commitments $ 42,492 $ — $ 146 $ 21,401 $ 93 $ — Forward mortgage loan contracts 54,730 1,031 — 30,330 32 — Customer interest rate swaps 5,775,638 1,208 379,864 5,220,363 5,676 326,924 Counterparty interest rate swaps (3) 5,775,634 222,907 1,213 5,220,363 151,111 5,711 Customer foreign currency contracts 13,234 218 156 8,341 253 42 Counterparty foreign currency contracts 12,970 255 141 8,297 72 168 Total $ 225,619 $ 381,520 $ 157,237 $ 332,845 (1) Derivative assets are included in other assets on the balance sheet. (2) Derivative liabilities are included in other liabilities on the balance sheet. (3) The fair values of certain counterparty interest rate swaps are zero due to the settlement of centrally cleared variation margin rules.

Commitments, Contingencies, a_2

Commitments, Contingencies, and Financial Guarantees (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Summary of Loan Commitments	The following table summarizes Old National’s other borrowings: (dollars in thousands) September 30, December 31, Old National Bancorp: Senior unsecured notes (fixed rate 4.125%) maturing August 2024 $ 175,000 $ 175,000 Unamortized debt issuance costs related to senior unsecured notes (130) (247) Subordinated debentures (fixed rate 5.875%) maturing September 2026 150,000 150,000 Junior subordinated debentures (rates of 6.95% to 9.21%) maturing July 2031 to September 2037 136,643 136,643 Other basis adjustments 19,496 23,363 Old National Bank: Finance lease liabilities 21,595 13,469 Subordinated debentures (variable rate 9.99%) maturing October 2025 12,000 12,000 Leveraged loans for NMTC (fixed rates of 1.00% to 1.43%) maturing December 2046 to June 2060 143,745 143,187 Other (1) 205,106 89,588 Total other borrowings $ 863,455 $ 743,003 (1) Includes overnight borrowings to collateralize certain derivative positions totaling $204.5 million at September 30, 2023 and $88.0 million at December 31, 2022. The following table summarizes the terms of our outstanding junior subordinated debentures at September 30, 2023: (dollars in thousands) Rate at September 30, Name of Trust Issuance Date Issuance Rate Maturity Date Bridgeview Statutory Trust I July 2001 $ 15,464 3-month SOFR plus 3.58% 9.21% July 31, 2031 Bridgeview Capital Trust II December 2002 15,464 3-month SOFR plus 3.35% 8.92% January 7, 2033 First Midwest Capital Trust I November 2003 37,825 6.95% fixed 6.95% December 1, 2033 St. Joseph Capital Trust II March 2005 5,155 3-month SOFR plus 1.75% 7.42% March 17, 2035 Northern States Statutory Trust I September 2005 10,310 3-month SOFR plus 1.80% 7.47% September 15, 2035 Anchor Capital Trust III August 2005 5,000 3-month SOFR plus 1.55% 7.21% September 30, 2035 Great Lakes Statutory Trust II December 2005 6,186 3-month SOFR plus 1.40% 7.07% December 15, 2035 Home Federal Statutory September 2006 15,464 3-month SOFR plus 1.65% 7.32% September 15, 2036 Monroe Bancorp Capital July 2006 3,093 3-month SOFR plus 1.60% 7.17% October 7, 2036 Tower Capital Trust 3 December 2006 9,279 3-month SOFR plus 1.69% 7.36% March 1, 2037 Monroe Bancorp Statutory March 2007 5,155 3-month SOFR plus 1.60% 7.27% June 15, 2037 Great Lakes Statutory Trust III June 2007 8,248 3-month SOFR plus 1.70% 7.37% September 15, 2037 Total $ 136,643 The following table summarizes Old National Bank’s unfunded loan commitments and standby letters of credit: (dollars in thousands) September 30, December 31, Unfunded loan commitments $ 9,142,538 $ 8,979,334 Standby letters of credit (1) 184,027 174,070 (1) Notional amount, which represents the maximum amount of future funding requirements. The carrying value was $1.2 million at September 30, 2023 and $0.8 million at December 31, 2022.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis, including financial assets and liabilities for which we have elected the fair value option, are summarized below: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 69,880 $ 69,880 $ — $ — Investment securities available-for-sale: U.S. Treasury 548,126 548,126 — — U.S. government-sponsored entities and agencies 1,142,900 — 1,142,900 — Mortgage-backed securities - Agency 3,862,705 — 3,862,705 — States and political subdivisions 544,944 — 544,944 — Pooled trust preferred securities 11,125 — 11,125 — Other securities 304,961 — 304,961 — Loans held-for-sale 122,033 — 122,033 — Derivative assets 227,833 — 227,833 — Financial Liabilities Derivative liabilities 409,269 — 409,269 — Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 52,507 $ 52,507 $ — $ — Investment securities available-for-sale: U.S. Treasury 200,927 200,927 — — U.S. government-sponsored entities and agencies 1,175,080 — 1,175,080 — Mortgage-backed securities - Agency 4,369,902 — 4,369,902 — States and political subdivisions 663,852 — 663,852 — Pooled trust preferred securities 10,811 — 10,811 — Other securities 353,140 — 353,140 — Loans held-for-sale 11,926 — 11,926 — Derivative assets 169,001 — 169,001 — Financial Liabilities Derivative liabilities 380,704 — 380,704 —
Schedule of Assets Measured at Fair Value on a Non-Recurring Basis	Assets measured at fair value at September 30, 2023 on a non-recurring basis are summarized below: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 10,783 $ — $ — $ 10,783 Commercial real estate loans 75,720 — — 75,720 Foreclosed Assets: Commercial 1,879 — — 1,879 Assets measured at fair value at December 31, 2022 on a non-recurring basis are summarized below: Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 22,562 $ — $ — $ 22,562 Commercial real estate loans 48,026 — — 48,026
Schedule of Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurements	The table below provides quantitative information about significant unobservable inputs used in fair value measurements within Level 3 of the fair value hierarchy: (dollars in thousands) Fair Value Valuation Techniques Unobservable Input Range (Weighted Average) (1) September 30, 2023 Collateral Dependent Loans Commercial loans $ 10,783 Discounted Discount for type of property, 10% - 40% (33%) cash flow age of appraisal, and current status Commercial real estate loans 75,720 Discounted Discount for type of property, 1% - 38% (17%) cash flow age of appraisal, and current status Foreclosed Assets Commercial real estate 1,879 Fair value of Discount for type of property, 4% - 17% (6%) collateral age of appraisal, and current status December 31, 2022 Collateral Dependent Loans Commercial loans $ 22,562 Discounted Discount for type of property, 10% - 47% (28%) cash flow age of appraisal, and current status Commercial real estate loans 48,026 Discounted Discount for type of property, 1% - 26% (11%) cash flow age of appraisal, and current status (1) Unobservable inputs were weighted by the relative fair value of the instruments.
Schedule of Difference Between the Aggregate Fair Value and the Aggregate Remaining Principal Balance	The difference between the aggregate fair value and the aggregate remaining principal balance for loans for which the fair value option has been elected was as follows: (dollars in thousands) Aggregate Fair Value Difference Contractual Principal September 30, 2023 Loans held-for-sale $ 122,033 $ 72 $ 121,961 December 31, 2022 Loans held-for-sale $ 11,926 $ 221 $ 11,705 The following table presents the amount of gains and losses from fair value changes included in income before income taxes for financial assets carried at fair value: (dollars in thousands) Other Interest Income Interest (Expense) Total Changes Three Months Ended September 30, 2023 Loans held-for-sale $ (327) $ 12 $ — $ (315) Three Months Ended September 30, 2022 Loans held-for-sale $ (710) $ 1 $ — $ (709) Nine Months Ended September 30, 2023 Loans held-for-sale $ (151) $ 2 $ — $ (149) Nine Months Ended September 30, 2022 Loans held-for-sale $ (1,775) $ 7 $ — $ (1,768)
Carrying Amounts and Estimated Fair Values of Financial Instruments, Not Carried at Fair Value	The carrying amounts and estimated exit price fair values of financial instruments not carried at fair value were as follows: Fair Value Measurements at September 30, 2023 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 1,663,430 $ 1,663,430 $ — $ — Investment securities held-to-maturity: U.S. government-sponsored entities and agencies 824,223 — 617,010 — Mortgage-backed securities - Agency 1,043,585 — 847,652 — State and political subdivisions 1,160,106 — 928,959 — Loans, net: Commercial 9,207,028 — — 9,078,129 Commercial real estate 13,770,202 — — 13,302,502 Residential real estate 6,675,508 — — 5,630,855 Consumer credit 2,621,114 — — 2,526,277 Accrued interest receivable 209,503 1,093 45,597 162,813 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 10,091,352 $ 10,091,352 $ — $ — Checking, NOW, savings, and money market 21,585,620 21,585,620 — — Time deposits 5,575,704 — 5,527,361 — Federal funds purchased and interbank borrowings 918 918 — — Securities sold under agreements to repurchase 279,061 279,061 — — FHLB advances 4,412,576 — 4,167,911 — Other borrowings 863,455 — 843,629 — Accrued interest payable 46,934 — 46,934 — Standby letters of credit 1,224 — — 1,224 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 3,582 Fair Value Measurements at December 31, 2022 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 728,412 $ 728,412 $ — $ — Investment securities held-to-maturity: U.S. government-sponsored entities and agencies 819,168 — 656,358 — Mortgage-backed securities - Agency 1,106,817 — 982,963 — State and political subdivisions 1,163,162 — 1,004,361 — Loans, net: Commercial 9,386,862 — — 9,066,583 Commercial real estate 12,317,825 — — 11,867,851 Residential real estate 6,438,525 — — 5,372,491 Consumer credit 2,676,758 — — 2,557,115 Accrued interest receivable 190,521 758 52,081 137,682 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 11,930,798 $ 11,930,798 $ — $ — Checking, NOW, savings, and money market 20,056,252 20,056,252 — — Time deposits 3,013,780 — 2,976,389 — Federal funds purchased and interbank borrowings 581,489 581,489 — — Securities sold under agreements to repurchase 432,804 432,804 — — FHLB advances 3,829,018 — 3,739,780 — Other borrowings 743,003 — 703,156 — Accrued interest payable 19,547 — 19,547 — Standby letters of credit 755 — — 755 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 3,666

Acquisition and Divestiture A_2

Acquisition and Divestiture Activity (Details) $ / shares in Units, $ in Thousands			9 Months Ended
	Oct. 26, 2023 USD ($) $ / shares	Nov. 18, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Assets			$ 49,059,448		$ 46,763,372
Total loans			32,577,834		31,123,641
Deposits			37,252,676		$ 35,000,830
Deposits, health savings accounts		$ 382,000
Gain on sale of health savings accounts business		$ 90,700
First Midwest
Business Acquisition [Line Items]
Transaction costs, expensed			23,200	$ 100,600
CapStar Financial Holdings, Inc. | Subsequent Event
Business Acquisition [Line Items]
Shares exchange ratio	1.155
Value of issuance common stock shares	$ 344,400
Share price (in dollars per share) | $ / shares	$ 16.64
Weighted average closing stock price	30 days
CapStar Financial Holdings, Inc. | CapStar Financial Holdings, Inc.
Business Acquisition [Line Items]
Assets			3,300,000
Total loans			2,300,000
Deposits			$ 2,800,000

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 147,876	$ 155,036	$ 146,600	$ 140,153	$ 114,985	$ (27,586)	$ 449,512	$ 227,552
Preferred dividends	(4,034)			(4,034)			(12,101)	(10,084)
Net income applicable to common shareholders	$ 143,842			$ 136,119			$ 437,411	$ 217,468
Weighted average common shares outstanding:
Weighted average common shares outstanding (basic) (in shares)	290,648			290,961			290,763	269,843
Effect of dilutive securities:
Restricted stock (in shares)	1,069			1,516			1,045	1,273
Stock appreciation rights (in shares)	0			6			1	7
Weighted average diluted shares outstanding (in shares)	291,717			292,483			291,809	271,123
Basic Net Income Per Common Share (in dollars per share)	$ 0.49			$ 0.47			$ 1.50	$ 0.81
Diluted Net Income Per Common Share (in dollars per share)	$ 0.49			$ 0.47			$ 1.50	$ 0.80

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value of Available-for-Sale Investment Securities Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-Sale
Total	$ 7,719,944	$ 7,772,603
Unrealized Gains	234	3,028
Unrealized Losses	(1,143,301)	(847,474)
Basis adjustments	(162,116)	(154,445)
Fair Value	6,414,761	6,773,712
Held-to-Maturity
Allowance for securities held-to-maturity	(150)	(150)
Total held-to-maturity securities	3,027,914	3,089,147
Unrealized Gains	0	221
Unrealized Losses	(634,293)	(445,686)
Basis adjustments	0	0
Fair Value	2,393,621	2,643,682
U.S. Treasury
Available-for-Sale
Total	616,608	253,148
Unrealized Gains	98	5
Unrealized Losses	(10,258)	(5,189)
Basis adjustments	(58,322)	(47,037)
Fair Value	548,126	200,927
U.S. government-sponsored entities and agencies
Available-for-Sale
Total	1,475,307	1,451,736
Unrealized Gains	0	0
Unrealized Losses	(229,113)	(169,248)
Basis adjustments	(103,294)	(107,408)
Fair Value	1,142,900	1,175,080
Held-to-Maturity
Amortized Cost	824,223	819,168
Unrealized Gains	0	0
Unrealized Losses	(207,213)	(162,810)
Basis adjustments	0	0
Fair Value	617,010	656,358
Mortgage-backed securities
Available-for-Sale
Total	4,686,448	4,986,354
Unrealized Gains	17	976
Unrealized Losses	(823,760)	(617,428)
Basis adjustments	0	0
Fair Value	3,862,705	4,369,902
Held-to-Maturity
Amortized Cost	1,043,585	1,106,817
Unrealized Gains	0	0
Unrealized Losses	(195,933)	(123,854)
Basis adjustments	0	0
Fair Value	847,652	982,963
States and political subdivisions
Available-for-Sale
Total	592,495	688,159
Unrealized Gains	7	1,789
Unrealized Losses	(47,058)	(26,096)
Basis adjustments	(500)	0
Fair Value	544,944	663,852
Held-to-Maturity
Amortized Cost	1,160,256	1,163,312
Unrealized Gains	0	221
Unrealized Losses	(231,147)	(159,022)
Basis adjustments	0	0
Fair Value	929,109	1,004,511
Pooled trust preferred securities
Available-for-Sale
Total	13,794	13,783
Unrealized Gains	0	0
Unrealized Losses	(2,669)	(2,972)
Basis adjustments	0	0
Fair Value	11,125	10,811
Other securities
Available-for-Sale
Total	335,292	379,423
Unrealized Gains	112	258
Unrealized Losses	(30,443)	(26,541)
Basis adjustments	0	0
Fair Value	$ 304,961	$ 353,140

Investment Securities - Schedul

Investment Securities - Schedule of Proceeds from Sales or Calls and Realized Gain and Losses of Available-for-sale Investment Securities and Other Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Proceeds	$ 28,531	$ 5,221	$ 111,419	$ 78,568
Realized gains	54	17	1,002	528
Realized losses	$ (295)	$ (189)	$ (6,442)	$ (443)

Investment Securities - Expecte

Investment Securities - Expected Maturities of Investment Securities Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-sale, Amortized Cost
Within one year	$ 539,157
One to five years	1,567,565
Five to ten years	3,987,461
Beyond ten years	1,625,761
Total	7,719,944	$ 7,772,603
Available-for-sale, Fair Value
Within one year	535,193
One to five years	1,395,867
Five to ten years	3,285,183
Beyond ten years	1,198,518
Total	$ 6,414,761	6,773,712
Available-for-sale, Weighted Average Yield
Within one year	4.71%
One to five years	2.80%
Five to ten years	2.37%
Beyond ten years	2.46%
Total	2.64%
Held-to-Maturity, Amortized Cost
One to five years	$ 161,837
Five to ten years	954,756
Beyond ten years	1,911,321
Total held-to-maturity securities	3,027,914	3,089,147
Held-to-Maturity, Fair Value
One to five years	127,716
Five to ten years	797,284
Beyond ten years	1,468,621
Total	$ 2,393,621	$ 2,643,682
Held-to-Maturity, Weighted Average Yield
One to five years	2.68%
Five to ten years	2.64%
Beyond ten years	2.71%
Total	2.69%

Investment Securities - Availab

Investment Securities - Available-for-Sale and Held-to-Maturity Investment Securities with Unrealized Losses by Aggregated Major Security Type and Length of Time in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	$ 465,307	$ 4,465,728
Available-for-sale, less than 12 months, unrealized losses	(14,072)	(480,166)
Available-for-sale, 12 months or longer, fair value	5,559,525	1,992,246
Available-for-sale, 12 months or longer, unrealized losses	(1,129,229)	(367,308)
Available-for-sale, fair value	6,024,832	6,457,974
Available-for-sale, unrealized losses	(1,143,301)	(847,474)
U.S. Treasury
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	37,492	130,967
Available-for-sale, less than 12 months, unrealized losses	(144)	(3,264)
Available-for-sale, 12 months or longer, fair value	178,540	66,992
Available-for-sale, 12 months or longer, unrealized losses	(10,114)	(1,925)
Available-for-sale, fair value	216,032	197,959
Available-for-sale, unrealized losses	(10,258)	(5,189)
U.S. government-sponsored entities and agencies
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	32,821	454,854
Available-for-sale, less than 12 months, unrealized losses	(58)	(75,795)
Available-for-sale, 12 months or longer, fair value	1,110,079	720,226
Available-for-sale, 12 months or longer, unrealized losses	(229,055)	(93,453)
Available-for-sale, fair value	1,142,900	1,175,080
Available-for-sale, unrealized losses	(229,113)	(169,248)
Mortgage-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	124,895	3,207,319
Available-for-sale, less than 12 months, unrealized losses	(5,798)	(358,507)
Available-for-sale, 12 months or longer, fair value	3,736,306	1,116,205
Available-for-sale, 12 months or longer, unrealized losses	(817,962)	(258,921)
Available-for-sale, fair value	3,861,201	4,323,524
Available-for-sale, unrealized losses	(823,760)	(617,428)
States and political subdivisions
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	258,362	414,813
Available-for-sale, less than 12 months, unrealized losses	(7,749)	(25,555)
Available-for-sale, 12 months or longer, fair value	260,563	2,703
Available-for-sale, 12 months or longer, unrealized losses	(39,309)	(541)
Available-for-sale, fair value	518,925	417,516
Available-for-sale, unrealized losses	(47,058)	(26,096)
Pooled trust preferred securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	0	0
Available-for-sale, less than 12 months, unrealized losses	0	0
Available-for-sale, 12 months or longer, fair value	11,125	10,811
Available-for-sale, 12 months or longer, unrealized losses	(2,669)	(2,972)
Available-for-sale, fair value	11,125	10,811
Available-for-sale, unrealized losses	(2,669)	(2,972)
Other securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, less than 12 months, fair value	11,737	257,775
Available-for-sale, less than 12 months, unrealized losses	(323)	(17,045)
Available-for-sale, 12 months or longer, fair value	262,912	75,309
Available-for-sale, 12 months or longer, unrealized losses	(30,120)	(9,496)
Available-for-sale, fair value	274,649	333,084
Available-for-sale, unrealized losses	$ (30,443)	$ (26,541)

Investment Securities - Held-to

Investment Securities - Held-to-Maturity with Unrecognized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value
Less than 12 months	$ 64,441	$ 1,560,831
12 months or longer	2,329,330	1,052,753
Total	2,393,771	2,613,584
Unrecognized Losses
Less than 12 months	(4,877)	(280,316)
12 months or longer	(629,416)	(165,370)
Total	(634,293)	(445,686)
U.S. government-sponsored entities and agencies
Fair Value
Less than 12 months	0	354,293
12 months or longer	617,010	302,066
Total	617,010	656,359
Unrecognized Losses
Less than 12 months	0	(110,523)
12 months or longer	(207,213)	(52,287)
Total	(207,213)	(162,810)
Mortgage-backed securities
Fair Value
Less than 12 months	0	367,849
12 months or longer	847,652	615,114
Total	847,652	982,963
Unrecognized Losses
Less than 12 months	0	(42,438)
12 months or longer	(195,933)	(81,416)
Total	(195,933)	(123,854)
States and political subdivisions
Fair Value
Less than 12 months	64,441	838,689
12 months or longer	864,668	135,573
Total	929,109	974,262
Unrecognized Losses
Less than 12 months	(4,877)	(127,355)
12 months or longer	(226,270)	(31,667)
Total	$ (231,147)	$ (159,022)

Investment Securities - Additio

Investment Securities - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) security instrument	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) security instrument	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Summary of Investment Holdings [Line Items]
Transferred from available-for-sale to held-for-maturity	$ 132,300,000		$ 132,300,000		$ 148,900,000
Allowance for credit losses for available-for-sale debt securities	0		0		0
Allowance for securities held-to-maturity	150,000		150,000		150,000
Accrued interest receivable	$ 38,000,000		$ 38,000,000		50,900,000
Number of securities in security portfolio | security	3,007		3,007
Number of securities in unrealized loss position | security	2,917		2,917
Fair Value	$ 6,414,761,000		$ 6,414,761,000		6,773,712,000
Unrealized losses	1,143,301,000		1,143,301,000		847,474,000
Equity securities, at fair value	69,880,000		69,880,000		52,507,000
Losses on equity securities	800,000	$ 700,000	1,400,000	$ 4,900,000
Impairments on equity securities without readily determinable fair value			0	$ 0
Other Assets
Summary of Investment Holdings [Line Items]
Equity securities without readily determinable fair value	418,300,000		418,300,000		396,800,000
Other Assets | Partnership Interest
Summary of Investment Holdings [Line Items]
Equity securities without readily determinable fair value	242,300,000		242,300,000
Other Assets | Initiatives in Low-to-Moderate Income Neighborhoods
Summary of Investment Holdings [Line Items]
Equity securities without readily determinable fair value	$ 176,000,000		$ 176,000,000
Pooled trust preferred securities
Summary of Investment Holdings [Line Items]
Number of instruments held | instrument	2		2
Fair Value	$ 11,125,000		$ 11,125,000		10,811,000
Unrealized losses	$ 2,669,000		$ 2,669,000		$ 2,972,000

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) segment portfolio	Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loan portfolios | portfolio	4
Number of loan segments | segment	7
Accrued interest receivable on loans	$ 162,800,000	$ 137,700,000
Loan placed on nonaccrual when past due, number of days	90 days
Loan participations	$ 2,800,000,000
Loan participations sold	1,200,000,000
Loan participations retained	1,600,000,000
Unfunded commitments on TDRs	$ 0
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Percentage of risk-based capital (in percent)	245%
Regulatory guideline limit (in percent)	300%

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Schedule of Composition of Loans and Impact of Adoption (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 32,577,834		$ 31,123,641
Allowance for credit losses on loans	(303,982)	$ (300,555)	(303,671)	$ (302,254)	$ (288,003)	$ (107,341)
Net loans	32,273,852		30,819,970
Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		0
After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	32,577,834		31,123,641
Allowance for credit losses on loans	(303,982)		(303,671)
Net loans	32,273,852		30,819,970
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,333,448		9,508,904
Allowance for credit losses on loans	(124,755)	(127,403)	(120,612)	(112,413)	(102,819)	(27,232)
Commercial | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(226,353)		(210,280)
Commercial | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,107,095		9,298,624
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,916,221		12,457,070
Allowance for credit losses on loans	(144,975)	(136,897)	(138,244)	(144,090)	(141,802)	(64,004)
Commercial real estate | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(165,593)		(158,322)
Commercial real estate | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,750,628		12,298,748
BBCC
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses on loans	(2,709)	(2,776)	(2,431)	(2,168)	(2,064)	(2,458)
BBCC | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	391,946		368,602
BBCC | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	391,946		368,602
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,696,288		6,460,441
Allowance for credit losses on loans	(20,780)	(20,421)	(21,916)	(21,256)	(19,729)	(9,347)
Residential real estate | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		0
Residential real estate | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,696,288		6,460,441
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,631,877		2,697,226
Consumer | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(2,631,877)		(2,697,226)
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,047,224		1,034,257
Allowance for credit losses on loans	(1,321)	(1,407)	(1,532)	(1,585)	(1,641)	(1,743)
Indirect | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,047,224		1,034,257
Indirect | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,047,224		1,034,257
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	542,689		629,186
Allowance for credit losses on loans	(3,571)	(4,755)	(12,116)	(16,096)	(14,412)	(528)
Direct | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	542,689		629,186
Direct | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	542,689		629,186
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,041,964		1,033,783
Allowance for credit losses on loans	(5,871)	$ (6,896)	(6,820)	$ (4,646)	$ (5,536)	$ (2,029)
Home equity | Portfolio Segment Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,041,964		1,033,783
Home equity | After Reclassifications
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,041,964		1,033,783
Direct Finance Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 173,000		$ 188,100

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 300,555	$ 288,003	$ 303,671	$ 107,341
Allowance Established for Acquired PCD Loans	0	10,558	0	89,089
Charge-offs	(22,750)	(11,440)	(55,261)	(20,200)
Recoveries	3,062	3,845	9,052	8,073
Provision for Loan Losses	23,115	11,288	46,520	117,951
Balance at End of Period	303,982	302,254	303,982	302,254
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	127,403	102,819	120,612	27,232
Allowance Established for Acquired PCD Loans	0	3,740	0	38,780
Charge-offs	(16,705)	(2,696)	(37,459)	(5,919)
Recoveries	1,616	2,206	3,713	3,219
Provision for Loan Losses	12,441	6,344	37,889	49,101
Balance at End of Period	124,755	112,413	124,755	112,413
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	136,897	141,802	138,244	64,004
Allowance Established for Acquired PCD Loans	0	6,818	0	49,419
Charge-offs	(2,291)	(4,772)	(5,938)	(5,596)
Recoveries	102	287	1,394	789
Provision for Loan Losses	10,267	(45)	11,275	35,474
Balance at End of Period	144,975	144,090	144,975	144,090
BBCC
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	2,776	2,064	2,431	2,458
Allowance Established for Acquired PCD Loans	0	0	0	0
Charge-offs	(1,049)	0	(1,171)	(48)
Recoveries	70	108	174	256
Provision for Loan Losses	912	(4)	1,275	(498)
Balance at End of Period	2,709	2,168	2,709	2,168
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	20,421	19,729	21,916	9,347
Allowance Established for Acquired PCD Loans	0	0	0	136
Charge-offs	(15)	(20)	(256)	(344)
Recoveries	28	66	153	636
Provision for Loan Losses	346	1,481	(1,033)	11,481
Balance at End of Period	20,780	21,256	20,780	21,256
Indirect
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,407	1,641	1,532	1,743
Allowance Established for Acquired PCD Loans	0	0	0	0
Charge-offs	(490)	(624)	(2,089)	(1,636)
Recoveries	325	379	1,349	921
Provision for Loan Losses	79	189	529	557
Balance at End of Period	1,321	1,585	1,321	1,585
Direct
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	4,755	14,412	12,116	528
Allowance Established for Acquired PCD Loans	0	0	0	31
Charge-offs	(2,180)	(3,299)	(8,018)	(6,550)
Recoveries	580	442	1,798	1,712
Provision for Loan Losses	416	4,541	(2,325)	20,375
Balance at End of Period	3,571	16,096	3,571	16,096
Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	6,896	5,536	6,820	2,029
Allowance Established for Acquired PCD Loans	0	0	0	723
Charge-offs	(20)	(29)	(330)	(107)
Recoveries	341	357	471	540
Provision for Loan Losses	(1,346)	(1,218)	(1,090)	1,461
Balance at End of Period	$ 5,871	$ 4,646	$ 5,871	$ 4,646

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses on Unfunded Loan Commitments (Details) - Unfunded Loan Commitment - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 37,007	$ 21,966	$ 32,188	$ 10,879
Provision for credit losses on unfunded loan commitments acquired during the period	0	0	0	11,013
(Recapture of) provision for credit losses on unfunded loan commitments	(4,047)	4,203	772	4,277
Balance at end of period	$ 32,960	$ 26,169	$ 32,960	$ 26,169

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 32,577,834		$ 32,577,834		$ 31,123,641
2023	593		603
2022	5,360		9,140
2021	12,829		26,689
2020	1,868		3,034
2019	280		7,937
Prior	736		4,463
Revolving	1,084		3,395
Total	22,750	$ 11,440	55,261	$ 20,200
Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	32,577,834		32,577,834		31,123,641
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	9,333,448		9,333,448		9,508,904
Total	16,705	2,696	37,459	5,919
Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,662,694		1,662,694		2,473,145
2022	1,866,341		1,866,341		1,851,604
2021	1,156,660		1,156,660		880,723
2020	640,366		640,366		802,628
2019	516,231		516,231		382,993
Prior	587,915		587,915		423,484
Revolving	2,174,229		2,174,229		2,118,835
Revolving to Term	502,659		502,659		365,212
Total loans	9,107,095		9,107,095		9,298,624
2023	0		0
2022	4,154		6,254
2021	12,271		23,432
2020	0		120
2019	0		6,789
Prior	63		302
Revolving	217		562
Total	16,705		37,459
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,916,221		13,916,221		12,457,070
Total	2,291	4,772	5,938	5,596
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,885,506		1,885,506		3,193,582
2022	3,583,898		3,583,898		2,928,035
2021	2,826,313		2,826,313		2,050,913
2020	1,785,467		1,785,467		1,384,735
2019	1,262,289		1,262,289		823,735
Prior	1,454,925		1,454,925		1,139,730
Revolving	83,549		83,549		57,818
Revolving to Term	868,681		868,681		720,200
Total loans	13,750,628		13,750,628		12,298,748
2023	0		0
2022	0		54
2021	0		735
2020	1,744		2,144
2019	0		0
Prior	547		3,005
Revolving	0		0
Total	2,291		5,938
BBCC
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,049	0	1,171	48
BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	77,267		77,267		92,738
2022	80,799		80,799		64,973
2021	51,998		51,998		53,229
2020	43,470		43,470		38,138
2019	31,663		31,663		24,464
Prior	15,859		15,859		11,690
Revolving	69,328		69,328		61,565
Revolving to Term	21,562		21,562		21,805
Total loans	391,946		391,946		368,602
2023	499		499
2022	501		548
2021	49		77
2020	0		47
2019	0		0
Prior	0		0
Revolving	0		0
Total	1,049		1,171
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023	362,518		362,518		1,327,227
2022	1,508,462		1,508,462		1,946,321
2021	1,864,634		1,864,634		1,826,623
2020	1,736,577		1,736,577		479,402
2019	447,754		447,754		138,086
Prior	776,064		776,064		742,687
Revolving	0		0		7
Revolving to Term	279		279		88
Total loans	6,696,288		6,696,288		6,460,441
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	15		256
Revolving	0		0
Total	15	20	256	344
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,696,288		6,696,288		6,460,441
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023	362,518		362,518		1,327,168
2022	1,504,933		1,504,933		1,945,792
2021	1,861,729		1,861,729		1,825,762
2020	1,732,039		1,732,039		478,529
2019	444,411		444,411		136,260
Prior	750,037		750,037		712,175
Revolving	0		0		7
Revolving to Term	279		279		88
Total loans	6,655,946		6,655,946		6,425,781
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		59
2022	3,529		3,529		529
2021	2,905		2,905		861
2020	4,538		4,538		873
2019	3,343		3,343		1,826
Prior	26,027		26,027		30,512
Revolving	0		0		0
Revolving to Term	0		0		0
Total loans	40,342		40,342		34,660
Indirect
Financing Receivable, Credit Quality Indicator [Line Items]
2023	309,340		309,340		504,758
2022	391,282		391,282		250,481
2021	182,410		182,410		144,910
2020	96,752		96,752		82,835
2019	47,238		47,238		31,788
Prior	20,006		20,006		19,423
Revolving	0		0		0
Revolving to Term	196		196		62
Total loans	1,047,224		1,047,224		1,034,257
2023	75		85
2022	276		954
2021	86		640
2020	12		153
2019	10		137
Prior	31		120
Revolving	0		0
Total	490	624	2,089	1,636
Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,047,224		1,047,224		1,034,257
Indirect | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023	309,220		309,220		504,410
2022	390,012		390,012		249,407
2021	181,235		181,235		144,265
2020	96,148		96,148		82,304
2019	46,877		46,877		31,484
Prior	19,666		19,666		19,095
Revolving	0		0		0
Revolving to Term	196		196		62
Total loans	1,043,354		1,043,354		1,031,027
Indirect | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023	120		120		348
2022	1,270		1,270		1,074
2021	1,175		1,175		645
2020	604		604		531
2019	361		361		304
Prior	340		340		328
Revolving	0		0		0
Revolving to Term	0		0		0
Total loans	3,870		3,870		3,230
Direct
Financing Receivable, Credit Quality Indicator [Line Items]
2023	84,836		84,836		133,049
2022	100,111		100,111		164,977
2021	108,061		108,061		78,020
2020	54,473		54,473		58,124
2019	35,381		35,381		45,626
Prior	91,081		91,081		60,738
Revolving	63,883		63,883		87,627
Revolving to Term	4,863		4,863		1,025
Total loans	542,689		542,689		629,186
2023	19		19
2022	429		1,330
2021	423		1,805
2020	112		570
2019	270		1,011
Prior	60		450
Revolving	867		2,833
Total	2,180	3,299	8,018	6,550
Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	542,689		542,689		629,186
Direct | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023	84,749		84,749		132,934
2022	99,625		99,625		164,126
2021	107,539		107,539		77,406
2020	54,070		54,070		57,919
2019	35,065		35,065		45,299
Prior	87,207		87,207		59,212
Revolving	63,877		63,877		87,622
Revolving to Term	4,852		4,852		671
Total loans	536,984		536,984		625,189
Direct | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023	87		87		115
2022	486		486		851
2021	522		522		614
2020	403		403		205
2019	316		316		327
Prior	3,874		3,874		1,526
Revolving	6		6		5
Revolving to Term	11		11		354
Total loans	5,705		5,705		3,997
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1		1		1,085
2022	716		716		1,056
2021	606		606		2,015
2020	893		893		1,943
2019	1,501		1,501		1,777
Prior	10,546		10,546		15,954
Revolving	996,489		996,489		991,699
Revolving to Term	31,212		31,212		18,254
Total loans	1,041,964		1,041,964		1,033,783
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	20		330
Revolving	0		0
Total	20	$ 29	330	$ 107
Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,041,964		1,041,964		1,033,783
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1		1		919
2022	692		692		896
2021	387		387		1,849
2020	690		690		1,497
2019	743		743		983
Prior	5,736		5,736		11,646
Revolving	994,797		994,797		990,001
Revolving to Term	23,918		23,918		14,792
Total loans	1,026,964		1,026,964		1,022,583
Home equity | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		166
2022	24		24		160
2021	219		219		166
2020	203		203		446
2019	758		758		794
Prior	4,810		4,810		4,308
Revolving	1,692		1,692		1,698
Revolving to Term	7,294		7,294		3,462
Total loans	15,000		15,000		11,200
Pass | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,615,716		1,615,716		2,388,618
2022	1,690,168		1,690,168		1,754,364
2021	1,095,758		1,095,758		796,340
2020	553,187		553,187		738,208
2019	479,907		479,907		362,986
Prior	501,610		501,610		388,617
Revolving	2,000,147		2,000,147		1,988,763
Revolving to Term	454,995		454,995		329,119
Total loans	8,391,488		8,391,488		8,747,015
Pass | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,805,852		1,805,852		3,066,960
2022	3,432,536		3,432,536		2,828,758
2021	2,715,562		2,715,562		1,989,000
2020	1,734,359		1,734,359		1,219,025
2019	1,117,895		1,117,895		675,572
Prior	1,273,742		1,273,742		1,018,719
Revolving	73,590		73,590		57,818
Revolving to Term	796,442		796,442		689,553
Total loans	12,949,978		12,949,978		11,545,405
Pass | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	74,658		74,658		90,341
2022	76,281		76,281		64,161
2021	49,463		49,463		52,304
2020	42,980		42,980		36,868
2019	30,085		30,085		23,618
Prior	14,488		14,488		11,333
Revolving	66,281		66,281		60,016
Revolving to Term	18,582		18,582		18,881
Total loans	372,818		372,818		357,522
Criticized | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	27,469		27,469		40,856
2022	110,893		110,893		30,661
2021	21,107		21,107		63,557
2020	46,241		46,241		33,490
2019	22,674		22,674		9,195
Prior	54,738		54,738		5,312
Revolving	107,105		107,105		61,036
Revolving to Term	32,247		32,247		4,327
Total loans	422,474		422,474		248,434
Criticized | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	58,440		58,440		75,306
2022	62,461		62,461		34,422
2021	42,128		42,128		22,569
2020	28,716		28,716		82,637
2019	27,978		27,978		86,504
Prior	90,549		90,549		56,864
Revolving	9,959		9,959		0
Revolving to Term	21,023		21,023		23,282
Total loans	341,254		341,254		381,584
Criticized | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,295		2,295		1,504
2022	2,469		2,469		525
2021	1,114		1,114		368
2020	76		76		692
2019	1,110		1,110		353
Prior	0		0		0
Revolving	2,470		2,470		1,006
Revolving to Term	2,264		2,264		1,603
Total loans	11,798		11,798		6,051
Substandard | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	19,509		19,509		37,223
2022	40,694		40,694		47,522
2021	32,135		32,135		16,540
2020	38,892		38,892		22,925
2019	9,970		9,970		4,844
Prior	20,431		20,431		21,204
Revolving	66,977		66,977		67,402
Revolving to Term	15,417		15,417		25,143
Total loans	244,025		244,025		242,803
Substandard | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	21,214		21,214		46,231
2022	84,269		84,269		16,928
2021	23,589		23,589		24,319
2020	16,822		16,822		78,468
2019	78,165		78,165		57,824
Prior	41,313		41,313		21,591
Revolving	0		0		0
Revolving to Term	50,424		50,424		4,108
Total loans	315,796		315,796		249,469
Substandard | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	98		98		811
2022	733		733		143
2021	619		619		0
2020	24		24		421
2019	401		401		0
Prior	1,196		1,196		0
Revolving	100		100		543
Revolving to Term	438		438		682
Total loans	3,609		3,609		2,600
Nonaccrual | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		3,627
2022	5,748		5,748		1,453
2021	2,034		2,034		566
2020	284		284		0
2019	2,718		2,718		0
Prior	0		0		0
Revolving	0		0		1,634
Revolving to Term	0		0		6,623
Total loans	10,784		10,784		13,903
Nonaccrual | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		3,151
2022	2,983		2,983		9,541
2021	11,470		11,470		5,014
2020	1,428		1,428		0
2019	52		52		2,312
Prior	11,385		11,385		22,155
Revolving	0		0		0
Revolving to Term	792		792		3,257
Total loans	28,110		28,110		45,430
Nonaccrual | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	216		216		42
2022	451		451		37
2021	310		310		118
2020	340		340		0
2019	0		0		429
Prior	87		87		284
Revolving	477		477		0
Revolving to Term	278		278		639
Total loans	2,159		2,159		1,549
Doubtful | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		2,821
2022	18,838		18,838		17,604
2021	5,626		5,626		3,720
2020	1,762		1,762		8,005
2019	962		962		5,968
Prior	11,136		11,136		8,351
Revolving	0		0		0
Revolving to Term	0		0		0
Total loans	38,324		38,324		46,469
Doubtful | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		1,934
2022	1,649		1,649		38,386
2021	33,564		33,564		10,011
2020	4,142		4,142		4,605
2019	38,199		38,199		1,523
Prior	37,936		37,936		20,401
Revolving	0		0		0
Revolving to Term	0		0		0
Total loans	115,490		115,490		76,860
Doubtful | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0		0		40
2022	865		865		107
2021	492		492		439
2020	50		50		157
2019	67		67		64
Prior	88		88		73
Revolving	0		0		0
Revolving to Term	0		0		0
Total loans	$ 1,562		$ 1,562		$ 880

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total loans	$ 32,577,834	$ 31,123,641
Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	32,577,834	31,123,641
Commercial
Financing Receivable, Past Due [Line Items]
Total loans	9,333,448	9,508,904
Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	9,107,095	9,298,624
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	13,916,221	12,457,070
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	13,750,628	12,298,748
BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	391,946	368,602
Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans	6,696,288	6,460,441
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,696,288	6,460,441
Indirect
Financing Receivable, Past Due [Line Items]
Total loans	1,047,224	1,034,257
Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,047,224	1,034,257
Direct
Financing Receivable, Past Due [Line Items]
Total loans	542,689	629,186
Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	542,689	629,186
Home equity
Financing Receivable, Past Due [Line Items]
Total loans	1,041,964	1,033,783
Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,041,964	1,033,783
Total Past Due | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	142,960	186,223
Total Past Due | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	19,472	30,028
Total Past Due | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	43,615	81,444
Total Past Due | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	2,496	1,698
Total Past Due | Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	49,279	40,967
Total Past Due | Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	8,100	9,378
Total Past Due | Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,273	9,450
Total Past Due | Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	13,725	13,258
30-59 Days Past Due | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	64,785	104,589
30-59 Days Past Due | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	2,754	14,147
30-59 Days Past Due | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	15,954	47,240
30-59 Days Past Due | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,273	730
30-59 Days Past Due | Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	29,762	24,181
30-59 Days Past Due | Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	5,576	6,302
30-59 Days Past Due | Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	3,626	5,404
30-59 Days Past Due | Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	5,840	6,585
60-89 Days Past Due | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	22,039	17,713
60-89 Days Past Due | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	4,214	4,801
60-89 Days Past Due | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,295	1,312
60-89 Days Past Due | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	511	365
60-89 Days Past Due | Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,784	5,033
60-89 Days Past Due | Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,368	2,118
60-89 Days Past Due | Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,059	2,118
60-89 Days Past Due | Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,808	1,966
Past Due 90 Days or More | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	56,136	63,921
Past Due 90 Days or More | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	12,504	11,080
Past Due 90 Days or More | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	21,366	32,892
Past Due 90 Days or More | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	712	603
Past Due 90 Days or More | Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	12,733	11,753
Past Due 90 Days or More | Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,156	958
Past Due 90 Days or More | Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,588	1,928
Past Due 90 Days or More | Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,077	4,707
Current | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	32,434,874	30,937,418
Current | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	9,087,623	9,268,596
Current | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	13,707,013	12,217,304
Current | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	389,450	366,904
Current | Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	6,647,009	6,419,474
Current | Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	1,039,124	1,024,879
Current | Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	536,416	619,736
Current | Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Past Due [Line Items]
Total loans	$ 1,028,239	$ 1,020,525

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	$ 261,346	$ 238,178
Nonaccrual With No Related Allowance	43,153	41,318
Past Due 90 Days or More and Accruing	1,192	2,650
Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	49,108	60,372
Nonaccrual With No Related Allowance	13,432	7,873
Past Due 90 Days or More and Accruing	577	152
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	143,600	122,290
Nonaccrual With No Related Allowance	29,721	33,445
Past Due 90 Days or More and Accruing	104	0
BBCC
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	3,721	2,429
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	0	0
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	40,342	34,660
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	0	1,808
Indirect
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	3,870	3,230
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	54	28
Direct
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	5,705	3,997
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	109	133
Home equity
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	15,000	11,200
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	$ 348	$ 529

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 32,577,834	$ 31,123,641
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	207,556	168,623
Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	33,031	43,245
Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,674	4,408
Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,870	5,085
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,562	7,414
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,333,448	9,508,904
Commercial | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,635	8,962
Commercial | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	31,856	42,754
Commercial | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	466	2,690
Commercial | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	288	1,611
Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	347	980
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,916,221	12,457,070
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	131,826	108,871
Commercial real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Commercial real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,205	1,718
Commercial real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Commercial real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,184	6,411
BBCC | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,131	1,939
BBCC | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,174	478
BBCC | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
BBCC | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	416	12
BBCC | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,696,288	6,460,441
Residential real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	40,342	34,660
Residential real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,047,224	1,034,257
Indirect | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,870	3,230
Indirect | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	542,689	629,186
Direct | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,622	2,991
Direct | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1	13
Direct | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3	0
Direct | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	296	232
Direct | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	31	23
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,041,964	1,033,783
Home equity | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	15,000	11,200
Home equity | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 0	$ 0

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Schedule of Amortized Cost Basis of Loans with Modifications (Details) - Extended Maturity - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Term Extension	$ 97,346	$ 137,391
Total Class of Loans	0.30%	0.40%
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Term Extension	$ 3,502	$ 20,811
Total Class of Loans	0%	0.20%
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Term Extension	$ 93,844	$ 116,580
Total Class of Loans	0.70%	0.80%

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Schedule of Monitors the Performance of Loan Modifications to Borrowers Experiencing Financial Difficulty to Understand the Effectiveness of its Modification Efforts (Details) - Extended Maturity - Segment Portfolio Reclassification, Adjusted Balance $ in Thousands	Sep. 30, 2023 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 137,391
30-59 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,086
60-89 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0
Past Due 90 Days or More
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,541
Total Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,627
Current
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	133,764
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	20,811
Commercial | 30-59 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0
Commercial | 60-89 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0
Commercial | Past Due 90 Days or More
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,541
Commercial | Total Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,541
Commercial | Current
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	18,270
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	116,580
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,086
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0
Commercial real estate | Past Due 90 Days or More
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0
Commercial real estate | Total Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,086
Commercial real estate | Current
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 115,494

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Schedule of the nature of the Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) - Extended Maturity	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Weighted- Average Term Extension (in months)	9 months 18 days	8 months 12 days
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Weighted- Average Term Extension (in months)	7 months 6 days	6 months
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Weighted- Average Term Extension (in months)	9 months 18 days	8 months 12 days

Leases - Additional Information

Leases - Additional Information (Details)	Sep. 30, 2023
Minimum
Lessee, Lease, Description [Line Items]
Operating lease term	5 years
Finance lease term	5 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease term	20 years
Finance lease term	20 years

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Finance lease cost:
Total	$ 8,268	$ 8,355	$ 25,994	$ 23,252
Occupancy/Equipment expense
Lessee, Lease, Description [Line Items]
Operating lease cost	7,462	7,657	23,569	21,323
Occupancy expense
Finance lease cost:
Amortization of right-of-use assets	742	680	2,170	2,003
Sub-lease income	(119)	(87)	(281)	(389)
Interest expense
Finance lease cost:
Interest on lease liabilities	$ 183	$ 105	$ 536	$ 315

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Operating Leases
Operating lease right-of-use assets	$ 179,284	$ 189,714
Operating lease liabilities	199,937	211,964
Finance Leases
Premises and equipment, net	20,571	10,799
Other borrowings	$ 21,595	$ 13,469
Finance lease, right-of-use asset, statement of financial position [extensible enumeration]	Premises and equipment, net	Premises and equipment, net
Finance lease, liability, statement of financial position [extensible enumeration]	Other borrowings	Other borrowings
Weighted-Average Remaining Lease Term (in Years)
Operating leases	8 years 6 months	9 years 1 month 6 days
Finance leases	10 years 7 months 6 days	7 years 2 months 12 days
Weighted-Average Discount Rate
Operating leases	2.93%	2.88%
Finance leases	3.89%	3.30%

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 23,766	$ 22,223
Operating cash flows from finance leases	536	315
Financing cash flows from finance leases	$ 1,893	$ 1,839

Leases - Schedule of Maturity A

Leases - Schedule of Maturity Analysis of Lease Liability by Lease Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Operating Leases
2023	$ 7,959
2024	31,183
2025	29,564
2026	28,622
2027	27,662
Thereafter	102,282
Total undiscounted lease payments	227,272
Amounts representing interest	(27,335)
Lease liability	199,937	$ 211,964
Finance Leases
2023	826
2024	3,357
2025	3,380
2026	2,154
2027	2,157
Thereafter	14,809
Total undiscounted lease payments	26,683
Amounts representing interest	(5,088)
Lease liability	$ 21,595	$ 13,469

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,998,716	$ 1,991,534	$ 1,998,716	$ 1,036,994
Acquisitions and adjustments	0	11,065	0	965,605
Balance at end of period	$ 1,998,716	$ 2,002,599	$ 1,998,716	$ 2,002,599

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Line Items]
Goodwill impairment	$ 0
Impairment charges				$ 0	$ 0
Amortization of intangibles		$ 6,040,000	$ 7,089,000	$ 18,286,000	$ 19,070,000
Minimum | Core Deposits and Other Intangible Assets
Goodwill [Line Items]
Estimated useful lives		5 years		5 years
Maximum | Core Deposits and Other Intangible Assets
Goodwill [Line Items]
Estimated useful lives		15 years		15 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 196,132	$ 226,885
Accumulated Amortization and Impairment	(88,013)	(100,480)
Net Carrying Amount	108,119	126,405
Core deposit
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	143,511	170,642
Accumulated Amortization and Impairment	(68,312)	(80,951)
Net Carrying Amount	75,199	89,691
Customer trust relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	52,621	56,243
Accumulated Amortization and Impairment	(19,701)	(19,529)
Net Carrying Amount	$ 32,920	$ 36,714

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense for Future Years (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2023 remaining	$ 5,869
2024	21,239
2025	18,358
2026	15,555
2027	12,867
Thereafter	34,231
Net Carrying Amount	$ 108,119	$ 126,405

Qualified Affordable Housing _3

Qualified Affordable Housing Projects and Other Tax Credit Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Investment	$ 175,951		$ 175,951		$ 156,755
Unfunded commitment	81,654		81,654		65,342
Amortization expense	5,852	$ 3,902	14,302	$ 9,437
Tax expense (benefit) recognized	(6,592)	(4,700)	(16,654)	(11,264)
LIHTC
Summary of Investment Holdings [Line Items]
Investment, proportional amortization	93,214		93,214		84,428
Unfunded commitment, proportional amortization	54,440		54,440		55,754
Amortization expense	3,208	1,240	6,135	3,734
Tax expense (benefit) recognized	(3,582)	(1,650)	(7,398)	(4,950)
FHTC
Summary of Investment Holdings [Line Items]
Investment, equity	36,715		36,715		19,316
Unfunded commitment, equity	27,214		27,214		9,588
Amortization expense	330	215	1,178	635
Tax expense (benefit) recognized	(399)	(262)	(1,423)	(776)
NMTC
Summary of Investment Holdings [Line Items]
Investment, equity	45,637		45,637		51,912
Unfunded commitment, equity	0		0		0
Amortization expense	2,092	2,237	6,275	4,439
Tax expense (benefit) recognized	(2,611)	(2,788)	(7,833)	(5,538)
Renewable Energy
Summary of Investment Holdings [Line Items]
Investment, equity	385		385		1,099
Unfunded commitment, equity	0		0		$ 0
Amortization expense	222	210	714	629
Tax expense (benefit) recognized	$ 0	$ 0	$ 0	$ 0

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Schedule of Securities Sold under Agreements to Repurchase and Related Weighted-Average Interest Rates (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Securities Sold under Agreements to Repurchase [Abstract]
Outstanding at period end	$ 279,061	$ 438,053	$ 432,804
Average amount outstanding during the period	351,362	450,966
Maximum amount outstanding at any month-end during the period	$ 430,537	$ 509,275
Weighted average interest rate during period (in percent)	0.91%	0.09%
Weighted average interest rate at end of period (in percent)	1.35%	0.40%	1.31%

Securities Sold Under Agreeme_4

Securities Sold Under Agreements to Repurchase - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Securities Sold under Agreements to Repurchase [Abstract]
Securities sold under agreements to repurchase	$ 279,061	$ 432,804	$ 438,053
Weighted average interest rate at end of period (in percent)	1.35%	1.31%	0.40%
Gross outstanding balance of repurchase agreements collateralized by securities percentage (in percent)	107%

Securities Sold Under Agreeme_5

Securities Sold Under Agreements to Repurchase - Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 279,061	$ 432,804	$ 438,053
U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	279,061
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	279,061
Overnight and Continuous | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	279,061
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	0
Up to 30 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	0
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	0
30-90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	0
Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	0
Greater Than 90 days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 0

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances - Summary of FHLB Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances [Line Items]
FHLB advances (fixed rates 0.00% to 5.61%    and variable rates 5.35% to 5.36%) maturing   December 2023 to September 2042	$ 4,450,528	$ 3,850,677
Fair value hedge basis adjustments and unamortized prepayment fees	(37,952)	(21,659)
Federal Home Loan Bank advances	$ 4,412,576	$ 3,829,018
Minimum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rate (in percent)	0%
Variable rate (in percent)	5.35%
Maximum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rate (in percent)	5.61%
Variable rate (in percent)	5.36%

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances [Line Items]
Weighted-average rates of FHLB advances (in percent)	3.36%	3.15%
Modifications, unamortized prepayment fees	$ 15.7	$ 20.2
FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Percentage of borrowings collateralized by investment securities and residential real estate loans (in percent)	190%

Federal Home Loan Bank Advanc_5

Federal Home Loan Bank Advances - Summary of Contractual Maturities of FHLB Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Federal Home Loan Banks [Abstract]
Due in 2023	$ 100,000
Due in 2024	25,243
Due in 2025	550,285
Due in 2026	100,000
Thereafter	3,675,000
Fair value hedge basis adjustments and unamortized prepayment fees	(37,952)	$ (21,659)
Federal Home Loan Bank advances	$ 4,412,576	$ 3,829,018

Other Borrowings - Summary of O

Other Borrowings - Summary of Other Borrowings (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Lease liability	$ 21,595	$ 13,469
Other borrowings	863,455	743,003
Old National Bank
Debt Instrument [Line Items]
Other basis adjustments	205,106	89,588
Lease liability	21,595	13,469
Derivative collateralize position amount	204,500	88,000
Old National Bancorp
Debt Instrument [Line Items]
Other basis adjustments	$ 19,496	23,363
Senior Unsecured Notes | Old National Bancorp
Debt Instrument [Line Items]
Fixed rate (in percent)	4.125%
Senior unsecured notes (fixed rate 4.125%) maturing August 2024	$ 175,000	175,000
Unamortized debt issuance costs related to senior unsecured notes	$ (130)	(247)
Subordinated Debt | Old National Bank
Debt Instrument [Line Items]
Variable rate (in percent)	9.99%
Subordinated debentures	$ 12,000	12,000
Subordinated Debt | Old National Bancorp
Debt Instrument [Line Items]
Fixed rate (in percent)	5.875%
Subordinated debentures	$ 150,000	150,000
Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Junior subordinated debentures (rates of 6.95% to 9.21%) maturing July 2031 to September 2037	136,643	136,643
Notes Payable to Banks | Old National Bank
Debt Instrument [Line Items]
Leveraged loans for NMTC (fixed rates of 1.00% to 1.43%) maturing December 2046 to June 2060	$ 143,745	$ 143,187
Minimum | Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Variable rate (in percent)	6.95%
Minimum | Notes Payable to Banks | Old National Bank
Debt Instrument [Line Items]
Fixed rate (in percent)	1%
Maximum | Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Variable rate (in percent)	9.21%
Maximum | Notes Payable to Banks | Old National Bank
Debt Instrument [Line Items]
Fixed rate (in percent)	1.43%

Other Borrowings - Contractual

Other Borrowings - Contractual Maturities of Other Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Due in 2023	$ 205,160
Due in 2024	177,653
Due in 2025	14,740
Due in 2026	151,576
Due in 2027	1,636
Thereafter	292,738
Unamortized debt issuance costs and other basis adjustments	19,952
Total	$ 863,455	$ 743,003

Other Borrowings - Summary of T

Other Borrowings - Summary of Terms of Outstanding Junior Subordinated Debentures (Details) - Trust Preferred Securities - Junior Subordinated Debentures	9 Months Ended
	Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Issuance Amount	$ 136,643,000
Bridgeview Statutory Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	9.21%
Bridgeview Statutory Trust I | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	3.58%
Bridgeview Capital Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	8.92%
Bridgeview Capital Trust II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	3.35%
First Midwest Capital Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 37,825,000
Variable rate (in percent)	6.95%
Rate	6.95%
St. Joseph Capital Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,155,000
Rate	7.42%
St. Joseph Capital Trust II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.75%
Northern States Statutory Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 10,310,000
Rate	7.47%
Northern States Statutory Trust I | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.80%
Anchor Capital Trust III
Debt Instrument [Line Items]
Issuance Amount	$ 5,000,000
Rate	7.21%
Anchor Capital Trust III | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.55%
Great Lakes Statutory Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 6,186,000
Rate	7.07%
Great Lakes Statutory Trust II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.40%
Home Federal Statutory    Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	7.32%
Home Federal Statutory    Trust I | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.65%
Monroe Bancorp Capital    Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 3,093,000
Rate	7.17%
Monroe Bancorp Capital    Trust I | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.60%
Tower Capital Trust 3
Debt Instrument [Line Items]
Issuance Amount	$ 9,279,000
Rate	7.36%
Tower Capital Trust 3 | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.69%
Monroe Bancorp Statutory    Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,155,000
Rate	7.27%
Monroe Bancorp Statutory    Trust II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.60%
Great Lakes Statutory Trust III
Debt Instrument [Line Items]
Issuance Amount	$ 8,248,000
Rate	7.37%
Great Lakes Statutory Trust III | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.70%

Other Borrowings - Additional I

Other Borrowings - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Feb. 15, 2022	Oct. 29, 2020
Debt Instrument [Line Items]
Other borrowings	$ 21,595	$ 13,469
Old National Bank
Debt Instrument [Line Items]
Other borrowings	21,595	13,469
Subordinated Debt | Old National Bank
Debt Instrument [Line Items]
Subordinated debentures	12,000	12,000
Subordinated Debt | Old National Bancorp
Debt Instrument [Line Items]
Subordinated debentures	$ 150,000	$ 150,000
Fixed rate (in percent)	5.875%
Anchor Bank (MN) | Subordinated Debentures | Subordinated Fixed-to-Floating Notes
Debt Instrument [Line Items]
Value of subordinated fixed-to-floating notes assumed				$ 12,000
Anchor Bank (MN) | Subordinated Debentures | Subordinated Fixed-to-Floating Notes | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	4.618%
First Midwest
Debt Instrument [Line Items]
Subordinated debentures			$ 150,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 5,292,095	$ 5,078,783	$ 5,128,595	$ 3,012,018
Other comprehensive income (loss) before    reclassifications	(168,206)	(245,126)	(183,958)	(814,032)
Amounts reclassified from AOCI to income	8,024	5,809	1,565	7,957
Balance at end of period	5,239,537	4,943,383	5,239,537	4,943,383
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(808,633)	(569,133)	(786,422)	(2,375)
Balance at end of period	(968,815)	(808,450)	(968,815)	(808,450)
Unrealized Gains and Losses on Available- for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(701,393)	(437,075)	(642,346)	(2,950)
Other comprehensive income (loss) before    reclassifications	(156,660)	(217,401)	(219,562)	(651,330)
Amounts reclassified from AOCI to income	178	131	4,033	(65)
Balance at end of period	(857,875)	(654,345)	(857,875)	(654,345)
Unrealized Gains and Losses on Held-to- Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(103,144)	(122,199)	(112,664)	0
Other comprehensive income (loss) before    reclassifications	0	0	1,325	(125,229)
Amounts reclassified from AOCI to income	4,193	5,121	12,388	8,151
Balance at end of period	(98,951)	(117,078)	(98,951)	(117,078)
Gains and Losses on Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(4,096)	(9,875)	(31,549)	543
Other comprehensive income (loss) before    reclassifications	(11,546)	(27,725)	34,279	(37,473)
Amounts reclassified from AOCI to income	3,653	565	(14,719)	(105)
Balance at end of period	(11,989)	(37,035)	(11,989)	(37,035)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	0	16	137	32
Other comprehensive income (loss) before    reclassifications	0	0	0	0
Amounts reclassified from AOCI to income	0	(8)	(137)	(24)
Balance at end of period	$ 0	$ 8	$ 0	$ 8

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	$ 241			$ 172			$ 5,440	$ (85)
Income tax (expense) benefit	(44,304)			(38,887)			(133,118)	(55,137)
Interest income (expense)	(375,086)			(376,589)			(1,138,745)	(936,846)
Salaries and employee benefits	131,541			147,203			404,715	433,167
Net income (loss)	(147,876)	$ (155,036)	$ (146,600)	(140,153)	$ (114,985)	$ 27,586	(449,512)	(227,552)
Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(8,024)			(5,809)			(1,565)	(7,957)
Amount Reclassified from AOCI | Unrealized gains and losses on    available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	(241)			(172)			(5,440)	85
Income tax (expense) benefit	63			41			1,407	(20)
Net income (loss)	(178)			(131)			(4,033)	65
Amount Reclassified from AOCI | Unrealized gains and losses on    held-to-maturity securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	1,430			1,651			4,186	2,623
Interest income (expense)	(5,623)			(6,772)			(16,574)	(10,774)
Net income (loss)	(4,193)			(5,121)			(12,388)	(8,151)
Amount Reclassified from AOCI | Gains and losses on hedges    Interest rate contracts | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	1,274			184			(5,174)	(34)
Interest income (expense)	(4,927)			(749)			19,893	139
Net income (loss)	(3,653)			(565)			14,719	105
Amount Reclassified from AOCI | Actuarial gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	0			(3)			(45)	(8)
Salaries and employee benefits	0			11			182	32
Net income (loss)	$ 0			$ 8			$ 137	$ 24

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences in Taxes from Continuing Operations Computed at Statutory Rate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Provision at statutory rate of 21%	$ 40,358	$ 37,598	$ 122,352	$ 59,365
Tax-exempt income:
Tax-exempt interest	(4,625)	(3,929)	(13,716)	(10,335)
Section 291/265 interest disallowance	675	85	1,593	150
Company-owned life insurance income	(743)	(684)	(2,315)	(2,340)
Tax-exempt income	(4,693)	(4,528)	(14,438)	(12,525)
State income taxes	8,163	7,050	24,856	7,808
Interim period effective rate adjustment	116	(31)	(607)	3,042
Tax credit investments - federal	(2,071)	(2,407)	(7,122)	(4,968)
Officer compensation limitation	1,040	401	3,120	1,053
Non-deductible FDIC premiums	1,949	1,178	6,096	2,549
Other, net	(558)	(374)	(1,139)	(1,187)
Income tax expense (benefit)	$ 44,304	$ 38,887	$ 133,118	$ 55,137
Effective tax rate	23.10%	21.70%	22.90%	19.50%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Income Taxes [Line Items]
Net deferred tax assets	$ 480,700,000	$ 435,800,000
Valuation allowance recorded	0	0
Bad debt reserves, created for tax purposes	58,600,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards	68,400,000	81,500,000
State
Income Taxes [Line Items]
Operating loss carryforwards	$ 115,600,000	$ 124,400,000

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Percentage of periodic changes in fair value qualifies for hedge accounting treatment (in percent)	100%
Interest Income
Derivative [Line Items]
Reclassified interest income (expense)	$ 5,800
Interest Expense
Derivative [Line Items]
Reclassified interest income (expense)	26,300
Interest rate swaps on borrowings | Cash flow hedges | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	150,000	$ 150,000
Interest rate swaps on borrowings | Fair value hedges | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	700,000	300,000
Interest rate collars and floors on loan pools | Cash flow hedges | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	1,500,000	1,900,000
Interest rate swaps on investment securities | Fair value hedges | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	998,107	909,957
Interest rate lock commitments | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	42,492	21,401
Forward mortgage loan contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	54,730	30,330
Counterparty interest rate swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	5,775,634	5,220,363
Customer interest rate swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	$ 5,775,638	$ 5,220,363

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Designated as Hedging Instrument
Derivative [Line Items]
Assets	$ 2,214	$ 11,764
Liabilities	27,749	47,859
Designated as Hedging Instrument | Cash flow hedges | Interest rate collars and floors on loan pools
Derivative [Line Items]
Notional	1,500,000	1,900,000
Assets	2,214	11,764
Liabilities	27,749	47,859
Designated as Hedging Instrument | Cash flow hedges | Interest rate swaps on borrowings
Derivative [Line Items]
Notional	150,000	150,000
Assets	0	0
Liabilities	0	0
Designated as Hedging Instrument | Fair value hedges | Interest rate swaps on borrowings
Derivative [Line Items]
Notional	700,000	300,000
Assets	0	0
Liabilities	0	0
Designated as Hedging Instrument | Fair value hedges | Interest rate swaps on investment securities
Derivative [Line Items]
Notional	998,107	909,957
Assets	0	0
Liabilities	0	0
Not Designated as Hedging Instrument
Derivative [Line Items]
Assets	225,619	157,237
Liabilities	381,520	332,845
Not Designated as Hedging Instrument | Interest rate lock commitments
Derivative [Line Items]
Notional	42,492	21,401
Assets	0	93
Liabilities	146	0
Not Designated as Hedging Instrument | Forward mortgage loan contracts
Derivative [Line Items]
Notional	54,730	30,330
Assets	1,031	32
Liabilities	0	0
Not Designated as Hedging Instrument | Customer interest rate swaps
Derivative [Line Items]
Notional	5,775,638	5,220,363
Assets	1,208	5,676
Liabilities	379,864	326,924
Not Designated as Hedging Instrument | Counterparty interest rate swaps
Derivative [Line Items]
Notional	5,775,634	5,220,363
Assets	222,907	151,111
Liabilities	1,213	5,711
Not Designated as Hedging Instrument | Customer foreign currency contracts
Derivative [Line Items]
Notional	13,234	8,341
Assets	218	253
Liabilities	156	42
Not Designated as Hedging Instrument | Counterparty foreign currency contracts
Derivative [Line Items]
Notional	12,970	8,297
Assets	255	72
Liabilities	$ 141	$ 168

Derivative Financial Instrume_5

Derivative Financial Instruments - Schedule of Effect of Derivative Instruments on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	$ (15,574)	$ (36,755)	$ 45,547	$ (49,679)
Gain (Loss) Reclassified from AOCI into Income	(4,927)	(749)	19,893	139
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	814	821	1,869	436
Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	35,984	47,431	(11,232)	151,508
Gain (Loss) Recognized in Income on Related Hedged Items	(36,489)	(47,337)	10,632	(151,574)
Interest rate swaps on borrowings | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	(9,553)	(532)	(18,500)	(7,889)
Gain (Loss) Recognized in Income on Related Hedged Items	9,566	638	18,303	8,193
Interest rate swaps on investment securities | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	45,537	47,963	7,268	159,397
Gain (Loss) Recognized in Income on Related Hedged Items	(46,055)	(47,975)	(7,671)	(159,767)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	(15,574)	(36,755)	4,302	(49,679)
Gain (Loss) Reclassified from AOCI into Income	(5,960)	(749)	17,481	139
Interest rate contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	426	108	1,125	1,058
Mortgage contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	391	638	760	(735)
Foreign currency contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ (3)	$ 75	$ (16)	$ 113

Commitments, Contingencies, a_3

Commitments, Contingencies, and Financial Guarantees - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) shares	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Term of standby letters of credit, years	1 year
Percent of unfunded loan commitments with fixed rates (in percent)	4%
Loan commitments floating rate, minimum (in percent)	0%
Loan commitments floating rate, maximum (in percent)	23%
Allowance for unfunded loan commitments	$ 33,000,000	$ 32,200,000
Class B Restricted Shares | Visa
Loss Contingencies [Line Items]
Restricted stock conversion ratio	1.5875
Investment owned, balance, shares (in shares) | shares	65,466
Investment owned, at cost	$ 0
Interest Rate Swap
Loss Contingencies [Line Items]
Notional amount	$ 522,500,000	$ 398,900,000

Commitments, Contingencies, a_4

Commitments, Contingencies, and Financial Guarantees - Loan Commitments and Standby Letters of Credit (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Unfunded loan commitments	$ 9,142,538	$ 8,979,334
Standby letters of credit	184,027	174,070
Carrying value of letters of credit	$ 1,200	$ 800

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	$ 69,880	$ 52,507
Investment securities available for sale	6,414,761	6,773,712
U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	548,126	200,927
U.S. government-sponsored entities and agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,142,900	1,175,080
Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	3,862,705	4,369,902
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	544,944	663,852
Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	11,125	10,811
Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	304,961	353,140
Fair Value on Recurring Basis | Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	69,880	52,507
Loans held-for-sale	122,033	11,926
Derivative assets	227,833	169,001
Derivative liabilities	409,269	380,704
Fair Value on Recurring Basis | Carrying Value | U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	548,126	200,927
Fair Value on Recurring Basis | Carrying Value | U.S. government-sponsored entities and agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,142,900	1,175,080
Fair Value on Recurring Basis | Carrying Value | Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	3,862,705	4,369,902
Fair Value on Recurring Basis | Carrying Value | States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	544,944	663,852
Fair Value on Recurring Basis | Carrying Value | Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	11,125	10,811
Fair Value on Recurring Basis | Carrying Value | Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	304,961	353,140
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	69,880	52,507
Loans held-for-sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	0	0
Loans held-for-sale	122,033	11,926
Derivative assets	227,833	169,001
Derivative liabilities	409,269	380,704
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	0	0
Loans held-for-sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	548,126	200,927
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,142,900	1,175,080
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	3,862,705	4,369,902
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	544,944	663,852
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	11,125	10,811
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	304,961	353,140
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	$ 0	$ 0

Fair Value - Assets Measured at

Fair Value - Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Fair Value on Non-recurring Basis - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commercial Foreclosed Assets | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 1,879
Commercial Foreclosed Assets | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0
Commercial Foreclosed Assets | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0
Commercial Foreclosed Assets | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	1,879
Commercial | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	10,783	$ 22,562
Commercial | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0	0
Commercial | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0	0
Commercial | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	10,783	22,562
Commercial real estate | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	75,720	48,026
Commercial real estate | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0	0
Commercial real estate | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	0	0
Commercial real estate | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 75,720	$ 48,026

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Allowance for credit losses	$ 303,982,000	$ 302,254,000	$ 303,982,000	$ 302,254,000	$ 300,555,000	$ 303,671,000	$ 288,003,000	$ 107,341,000
Provision for credit losses	19,068,000	15,490,000	47,292,000	133,391,000
Other real estate owned property write-downs	26,000	200,000	100,000	600,000
Valuation allowance for loan servicing rights with impairments	0		0
Valuation allowance for loan servicing rights with impairments, impairments (recoveries) during period	0	0	$ 0	0
Past due period of mortgage loans held for sale			90 days
Interest income for residential loans held for sale	400,000	400,000	$ 900,000	1,600,000
Fair Value on Non-recurring Basis
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other real estate	1,900,000		1,900,000
Impaired Commercial and Commercial Real Estate Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Principal amount of impaired commercial and commercial real estate loans	117,500,000		117,500,000			92,000,000
Allowance for credit losses	31,000,000		31,000,000			$ 21,500,000
Provision for credit losses	$ 2,100,000	$ 7,300,000	$ 21,900,000	$ 20,100,000

Fair Value - Quantitative Infor

Fair Value - Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurements (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Collateral Dependent Loans | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 10,783	$ 22,562
Collateral Dependent Loans | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 75,720	$ 48,026
Collateral Dependent Loans | Minimum | Discount for type of property, age of appraisal, and current status | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.10	0.10
Collateral Dependent Loans | Minimum | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.01	0.01
Collateral Dependent Loans | Maximum | Discount for type of property, age of appraisal, and current status | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.40	0.47
Collateral Dependent Loans | Maximum | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.38	0.26
Collateral Dependent Loans | Weighted Average | Discount for type of property, age of appraisal, and current status | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.33	0.28
Collateral Dependent Loans | Weighted Average | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.17	0.11
Foreclosed Assets | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,879
Foreclosed Assets | Minimum | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.04
Foreclosed Assets | Maximum | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.17
Foreclosed Assets | Weighted Average | Discount for type of property, age of appraisal, and current status | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.06

Fair Value - Schedule of Differ

Fair Value - Schedule of Difference between the Aggregate Fair Value and the Aggregate Remaining Principal Balance (Details) - Loans held-for-sale - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 122,033	$ 11,926
Difference	72	221
Contractual Principal	$ 121,961	$ 11,705

Fair Value - Changes in Fair Va

Fair Value - Changes in Fair Value for Items Measured at Fair Value Pursuant to Election of the Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Trading Securities and Other Trading Assets [Line Items]
Interest Income	$ 375,086	$ 376,589	$ 1,138,745	$ 936,846
Interest (Expense)	(201,433)	(29,929)	(478,325)	(59,535)
Loans held-for-sale
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other Gains and (Losses)	(327)	(710)	(151)	(1,775)
Interest Income	12	1	2	7
Interest (Expense)	0	0	0	0
Total Changes in Fair Values Included in Current Period Earnings	$ (315)	$ (709)	$ (149)	$ (1,768)

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments, Not Carried at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	$ 1,663,430	$ 728,412
Loans, net	32,273,852	30,819,970
Accrued interest receivable	209,503	190,521
Noninterest-bearing demand deposits	10,091,352	11,930,798
Time deposits	5,575,704	3,013,780
Federal funds purchased and interbank borrowings	918	581,489
Securities sold under agreements to repurchase	279,061	432,804	$ 438,053
Federal Home Loan Bank advances	4,412,576	3,829,018
Other borrowings	863,455	743,003
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Significant Other Observable Inputs (Level 2) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		656,358
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		982,963
Significant Other Observable Inputs (Level 2) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		1,004,361
Significant Unobservable Inputs (Level 3) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Significant Unobservable Inputs (Level 3) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity		0
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	1,663,430	728,412
Accrued interest receivable	209,503	190,521
Noninterest-bearing demand deposits	10,091,352	11,930,798
Checking, NOW, savings, and money market    interest-bearing deposits	21,585,620	20,056,252
Time deposits	5,575,704	3,013,780
Federal funds purchased and interbank borrowings	918	581,489
Securities sold under agreements to repurchase	279,061	432,804
Federal Home Loan Bank advances	4,412,576	3,829,018
Other borrowings	863,455	743,003
Accrued interest payable	46,934	19,547
Standby letters of credit	1,224	755
Commitments to extend credit	0	0
Carrying Value | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	824,223	819,168
Carrying Value | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	1,043,585	1,106,817
Carrying Value | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	1,160,106	1,163,162
Carrying Value | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	9,207,028	9,386,862
Carrying Value | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	13,770,202	12,317,825
Carrying Value | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	6,675,508	6,438,525
Carrying Value | Consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	2,621,114	2,676,758
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	1,663,430	728,412
Accrued interest receivable	1,093	758
Noninterest-bearing demand deposits	10,091,352	11,930,798
Checking, NOW, savings, and money market    interest-bearing deposits	21,585,620	20,056,252
Time deposits	0	0
Federal funds purchased and interbank borrowings	918	581,489
Securities sold under agreements to repurchase	279,061	432,804
Federal Home Loan Bank advances	0	0
Other borrowings	0	0
Accrued interest payable	0	0
Standby letters of credit	0	0
Commitments to extend credit	0	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	0	0
Accrued interest receivable	45,597	52,081
Noninterest-bearing demand deposits	0	0
Checking, NOW, savings, and money market    interest-bearing deposits	0	0
Time deposits	5,527,361	2,976,389
Federal funds purchased and interbank borrowings	0	0
Securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances	4,167,911	3,739,780
Other borrowings	843,629	703,156
Accrued interest payable	46,934	19,547
Standby letters of credit	0	0
Commitments to extend credit	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	617,010
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	847,652
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	928,959
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	0	0
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	0	0
Accrued interest receivable	162,813	137,682
Noninterest-bearing demand deposits	0	0
Checking, NOW, savings, and money market    interest-bearing deposits	0	0
Time deposits	0	0
Federal funds purchased and interbank borrowings	0	0
Securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances	0	0
Other borrowings	0	0
Accrued interest payable	0	0
Standby letters of credit	1,224	755
Commitments to extend credit	3,582	3,666
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | U.S. government-sponsored entities and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity	0
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	9,078,129	9,066,583
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	13,302,502	11,867,851
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	5,630,855	5,372,491
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Consumer credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net	$ 2,526,277	$ 2,557,115