Old National Bancorp (ONB) 10-Q 28 Oct 20 2020 Q3 Quarterly report Financial data

Cover

Cover	9 Months Ended
	Sep. 30, 2020shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-15817
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
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	ONB
Security Exchange Name	NASDAQ
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)	165,333,000
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Registrant Name	Old National Bancorp /IN/
Entity Central Index Key	0000707179
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks		$ 229,631	$ 234,766
Money market and other interest-earning investments		101,119	41,571
Total cash and cash equivalents		330,750	276,337
Equity securities, at fair value		2,518	6,842
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		5,601,534	5,385,091
Federal Home Loan Bank/Federal Reserve Bank stock, at cost		169,452	164,099
Loans held for sale, at fair value		85,091	46,898
Loans:
Total loans		13,892,509	12,117,524
Allowance for loan losses	[1]	(131,388)	(54,619)
Net loans		13,761,121	12,062,905
Premises and equipment, net		463,253	490,925
Operating lease right-of-use assets		77,482	95,477
Accrued interest receivable		83,052	85,123
Goodwill		1,036,994	1,036,994
Other intangible assets		49,258	60,105
Company-owned life insurance		455,975	448,967
Other assets		343,996	251,904
Total assets		22,460,476	20,411,667
Deposits:
Noninterest-bearing demand		5,463,007	4,042,286
Interest-bearing:
Checking and NOW		4,588,432	4,149,639
Savings		3,287,302	2,845,423
Money market		1,904,404	1,833,819
Other time deposits		1,206,658	1,589,988
Brokered certificates of deposit		56,691	92,242
Total deposits		16,506,494	14,553,397
Federal funds purchased and interbank borrowings		1,259	350,414
Securities sold under agreements to repurchase		399,141	327,782
Federal Home Loan Bank advances		2,087,648	1,822,847
Other borrowings		237,683	243,685
Operating lease liabilities		88,552	99,500
Accrued expenses and other liabilities		218,550	161,589
Total liabilities		19,539,327	17,559,214
Shareholders' Equity
Preferred stock, 2,000 shares authorized, no shares issued or outstanding		0	0
Common stock, $1.00 per share stated value, 300,000 shares authorized,    165,333 and 169,616 shares issued and outstanding, respectively		165,333	169,616
Capital surplus		1,873,483	1,944,445
Retained earnings		733,049	682,185
Accumulated other comprehensive income (loss), net of tax		149,284	56,207
Total shareholders' equity		2,921,149	2,852,453
Total liabilities and shareholders' equity		22,460,476	20,411,667
Commercial
Loans:
Total loans		4,264,568	2,890,296
Allowance for loan losses		(28,393)	(22,585)
Commercial real estate
Loans:
Total loans		5,701,493	5,166,792
Allowance for loan losses		(75,912)	(21,588)
Residential real estate
Loans:
Total loans		2,265,299	2,334,289
Allowance for loan losses		(13,924)	(2,299)
Consumer
Loans:
Total loans		1,661,149	1,726,147
Allowance for loan losses			(8,147)
U.S. Treasury
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		10,230	17,682
U.S. government-sponsored entities and agencies
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		491,541	592,984
Mortgage-backed securities
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		3,382,280	3,183,861
States and political subdivisions
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		1,426,495	1,275,643
Other securities
Investment securities - available-for-sale, at fair value:
Total investment securities - available-for-sale		$ 290,988	$ 314,921
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, stated value (in dollars per share)	$ 1	$ 1
Authorized and unissued common shares reserved for issuance (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	165,333,000	169,616,000
Common stock, shares outstanding (in shares)	165,333,000	169,616,000

Consolidated Statements of Inco

Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Loans including fees:
Taxable		$ 124,261	$ 145,417	$ 377,725	$ 432,642
Nontaxable		3,312	3,905	10,390	12,114
Investment securities:
Taxable		23,839	28,884	76,593	86,162
Nontaxable		8,615	7,119	24,909	21,776
Money market and other interest-earning investments		59	528	442	1,140
Total interest income		160,086	185,853	490,059	553,834
Interest Expense
Deposits		5,297	18,707	24,393	53,670
Federal funds purchased and interbank borrowings		12	1,484	1,296	5,219
Securities sold under agreements to repurchase		160	715	729	2,048
Federal Home Loan Bank advances		6,709	9,123	21,321	29,093
Other borrowings		2,335	2,728	7,305	8,430
Total interest expense		14,513	32,757	55,044	98,460
Net interest income		145,573	153,096	435,015	455,374
Provision for loan losses	[1]	0	1,437	39,495	3,483
Net interest income after provision for loan losses		145,573	151,659	395,520	451,891
Noninterest Income
Wealth management fees		9,239	9,160	27,547	27,604
Service charges on deposit accounts		8,698	11,860	26,357	34,201
Debit card and ATM fees		5,276	5,370	15,106	16,292
Mortgage banking revenue		18,110	8,850	46,542	20,996
Investment product fees		5,351	5,244	16,070	16,106
Capital markets income		5,428	4,560	15,935	10,227
Company-owned life insurance		2,830	2,703	8,878	8,602
Debt securities gains (losses), net		4,921	424	10,606	1,486
Other income		4,906	5,790	13,681	16,077
Total noninterest income		64,759	53,961	180,722	151,591
Noninterest Expense
Salaries and employee benefits		69,860	71,729	215,589	214,478
Occupancy		13,930	11,934	42,308	41,071
Equipment		3,754	3,954	12,912	12,945
Marketing		2,140	4,105	7,632	12,267
Data processing		9,628	8,961	28,724	28,509
Communication		2,241	2,349	7,335	8,252
Professional fees		3,083	5,037	10,921	12,868
FDIC assessment		1,319	960	4,942	4,501
Amortization of intangibles		3,459	4,168	10,847	12,965
Amortization of tax credit investments		3,115	1,211	8,917	2,039
Other expense		7,705	8,177	48,972	23,849
Total noninterest expense		120,234	122,585	399,099	373,744
Income before income taxes		90,098	83,035	177,143	229,738
Income tax expense		12,154	13,254	24,854	40,717
Net income		$ 77,944	$ 69,781	$ 152,289	$ 189,021
Net income per common share - basic (in dollars per share)		$ 0.47	$ 0.41	$ 0.92	$ 1.10
Net income per common share - diluted (in dollars per share)		$ 0.47	$ 0.41	$ 0.92	$ 1.09
Weighted average number of common shares outstanding - basic (in shares)		164,773	170,746	165,748	172,807
Weighted average number of common shares outstanding - diluted (in shares)		165,419	171,551	166,370	173,527
Dividends per common share (in dollars per share)		$ 0.14	$ 0.13	$ 0.42	$ 0.39
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 77,944	$ 69,781	$ 152,289	$ 189,021
Change in debt securities available-for-sale:
Unrealized holding gains (losses) for the period	6,599	19,567	126,281	133,081
Reclassification adjustment for securities (gains) losses realized in income	(4,921)	(424)	(10,606)	(1,486)
Income tax effect	(281)	(3,602)	(25,598)	(30,005)
Unrealized gains (losses) on available-for-sale debt securities	1,397	15,541	90,077	101,590
Change in securities held-to-maturity:
Amortization of unrealized losses on securities transferred from available-for-sale	0	1,384	0	2,405
Income tax effect	0	(392)	0	(627)
Changes from securities held-to-maturity	0	992	0	1,778
Cash flow hedges:
Net unrealized derivative gains (losses) on cash flow hedges	(11)	(73)	7,546	479
Reclassification adjustment for (gains) losses realized in net income	(1,550)	(21)	(3,651)	(412)
Income tax effect	384	23	(957)	(17)
Changes from cash flow hedges	(1,177)	(71)	2,938	50
Defined benefit pension plans:
Amortization of net loss recognized in income	28	20	82	61
Income tax effect	(7)	(5)	(20)	(15)
Changes from defined benefit pension plans	21	15	62	46
Other comprehensive income (loss), net of tax	241	16,477	93,077	103,464
Comprehensive income	$ 78,185	$ 86,258	$ 245,366	$ 292,485

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principles	$ 6,322			$ 6,322
Adjusted balance	2,695,892	$ 175,141	$ 2,031,695	534,006	$ (44,950)
Beginning balance at Dec. 31, 2018	2,689,570	175,141	2,031,695	527,684	(44,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56,276			56,276
Other comprehensive income (loss)	47,570				47,570
Dividends - common stock	(22,812)			(22,812)
Common stock issued	130	9	121
Common stock repurchased	(27,297)	(1,655)	(25,642)
Share-based compensation expense	1,800		1,800
Stock activity under incentive compensation plans	313	484	(12)	(159)
Ending balance at Mar. 31, 2019	2,751,872	173,979	2,007,962	567,311	2,620
Beginning balance at Dec. 31, 2018	2,689,570	175,141	2,031,695	527,684	(44,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	189,021
Other comprehensive income (loss)	103,464
Ending balance at Sep. 30, 2019	2,832,530	170,031	1,948,808	655,177	58,514
Beginning balance at Mar. 31, 2019	2,751,872	173,979	2,007,962	567,311	2,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62,964			62,964
Other comprehensive income (loss)	39,417				39,417
Dividends - common stock	(22,476)			(22,476)
Common stock issued	148	10	138
Common stock repurchased	(30,845)	(1,884)	(28,961)
Share-based compensation expense	1,946		1,946
Stock activity under incentive compensation plans	113	126	120	(133)
Ending balance at Jun. 30, 2019	2,803,139	172,231	1,981,205	607,666	42,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	69,781			69,781
Other comprehensive income (loss)	16,477				16,477
Dividends - common stock	(22,136)			(22,136)
Common stock issued	141	8	133
Common stock repurchased	(37,072)	(2,206)	(34,866)
Share-based compensation expense	2,200		2,200
Stock activity under incentive compensation plans	0	(2)	136	(134)
Ending balance at Sep. 30, 2019	2,832,530	170,031	1,948,808	655,177	58,514
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principles	(31,150)			(31,150)
Adjusted balance	2,821,303	169,616	1,944,445	651,035	56,207
Beginning balance at Dec. 31, 2019	2,852,453	169,616	1,944,445	682,185	56,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,640			22,640
Other comprehensive income (loss)	81,950				81,950
Dividends - common stock	(23,535)			(23,535)
Common stock issued	151	9	142
Common stock repurchased	(81,822)	(5,076)	(76,746)
Share-based compensation expense	2,748		2,748
Stock activity under incentive compensation plans	0	560	(329)	(231)
Ending balance at Mar. 31, 2020	2,823,435	165,109	1,870,260	649,909	138,157
Beginning balance at Dec. 31, 2019	2,852,453	169,616	1,944,445	682,185	56,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	152,289
Other comprehensive income (loss)	93,077
Ending balance at Sep. 30, 2020	2,921,149	165,333	1,873,483	733,049	149,284
Beginning balance at Mar. 31, 2020	2,823,435	165,109	1,870,260	649,909	138,157
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	51,705			51,705
Other comprehensive income (loss)	10,886				10,886
Dividends - common stock	(23,113)			(23,113)
Common stock issued	145	11	134
Common stock repurchased	(473)	(34)	(439)
Share-based compensation expense	1,480		1,480
Stock activity under incentive compensation plans	190	7	306	(123)
Ending balance at Jun. 30, 2020	2,864,255	165,093	1,871,741	678,378	149,043
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,944			77,944
Other comprehensive income (loss)	241				241
Dividends - common stock	(23,147)			(23,147)
Common stock issued	136	11	125
Common stock repurchased	(14)	(2)	(12)
Share-based compensation expense	1,734		1,734
Stock activity under incentive compensation plans	0	231	(105)	(126)
Ending balance at Sep. 30, 2020	$ 2,921,149	$ 165,333	$ 1,873,483	$ 733,049	$ 149,284

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Dividends per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.14	$ 0.13	$ 0.13	$ 0.13	$ 0.42	$ 0.39

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities
Net income		$ 152,289	$ 189,021
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation		21,807	19,980
Amortization of other intangible assets		10,847	12,965
Amortization of tax credit investments		8,917	2,039
Net premium amortization on investment securities		14,664	13,199
Accretion income related to acquired loans		(17,883)	(33,465)
Share-based compensation expense		5,962	5,946
Excess tax (benefit) expense on share-based compensation		(747)	(1,057)
Provision for loan losses	[1]	39,495	3,483
Debt securities (gains) losses, net		(10,606)	(1,486)
Net (gains) losses on sales of loans and other assets		(8,636)	(3,815)
Increase in cash surrender value of company-owned life insurance		(8,878)	(8,602)
Residential real estate loans originated for sale		(1,114,932)	(564,457)
Proceeds from sales of residential real estate loans		1,099,258	528,739
(Increase) decrease in interest receivable		2,071	8,717
(Increase) decrease in other assets		(109,291)	(1,695)
Increase (decrease) in accrued expenses and other liabilities		764	(32,816)
Net cash flows provided by (used in) operating activities		85,101	136,696
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale		(1,859,755)	(1,713,799)
Purchases of Federal Home Loan Bank/Federal Reserve Bank stock		(10,025)	(21,142)
Proceeds from maturities, prepayments, and calls of investment securities available-for-sale		1,475,609	810,397
Proceeds from sales of investment securities available-for-sale		296,075	295,615
Proceeds from maturities, prepayments, and calls of investment securities held-to-maturity		0	99,913
Proceeds from sales of Federal Home Loan Bank/Federal Reserve Bank stock		4,672	21
Proceeds from sales of equity securities		39,218	130
Loan originations and payments, net		(1,756,697)	257,675
Proceeds from company-owned life insurance death benefits		1,870	5,716
Proceeds from sales of premises and equipment and other assets		7,014	3,038
Purchases of premises and equipment and other assets		(26,865)	(31,095)
Net cash flows provided by (used in) investing activities		(1,828,884)	(293,531)
Net increase (decrease) in:
Deposits		1,953,097	98,403
Federal funds purchased and interbank borrowings		(349,155)	(29,546)
Securities sold under agreements to repurchase		71,359	(24,743)
Other borrowings		(429)	3,744
Payments for maturities of Federal Home Loan Bank advances		(550,004)	(375,999)
Proceeds from Federal Home Loan Bank advances		825,000	750,000
Cash dividends paid on common stock		(69,795)	(67,424)
Common stock repurchased		(82,309)	(95,214)
Proceeds from exercise of stock options		0	280
Common stock issued		432	419
Net cash flows provided by (used in) financing activities		1,798,196	259,920
Net increase (decrease) in cash and cash equivalents		54,413	103,085
Cash and cash equivalents at beginning of period		276,337	317,165
Cash and cash equivalents at end of period		330,750	420,250
Supplemental cash flow information:
Total interest paid		59,037	101,224
Total taxes paid (net of refunds)		15,836	2,954
Investment securities purchased but not settled		50,317	64,924
Operating lease right-of-use assets obtained in exchange for lease obligations		(1,133)
Operating lease right-of-use assets obtained in exchange for lease obligations			117,853
Finance lease right-of-use assets obtained in exchange for lease obligations		$ 5,225	$ 7,871
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2020
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 affiliates (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, 2020 and December 31, 2019, and the results of its operations for the three and nine months ended September 30, 2020 and 2019. Interim results do not necessarily represent annual results. These financial statements should be read in conjunction with Old National’s Annual Report on Form 10-K for the year ended December 31, 2019. All significant 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.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2020 FASB ASC 326 – In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and all related subsequent amendments thereto (“CECL”). The main objective of this amendment is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments within its scope, including loans held for investment purposes and other commitments to extend credit held by a reporting entity at each reporting date. The amendment requires the measurement of all expected credit losses for the in-scope financial assets at the date of origination or acquisition, and at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to enhance their credit loss estimates. The amendment requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The current expected credit loss measurement will be used to estimate the allowance for credit losses (“ACL”) over the life of the financial assets. The amendments in this update became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. As previously disclosed, Old National formed a cross-functional committee to oversee the adoption of the ASU at the effective date. A working group was also formed to develop a project plan focused on understanding the ASU, researching issues, identifying data needs for modeling inputs, technology requirements, modeling considerations, and ensuring overarching governance was achieved for each objective and milestone. The working group identified seven distinct loan portfolios for which a model to estimate credit losses has been developed. For all seven loan portfolios, the data sets have been identified, populated, and internally validated. Old National has completed data and model validation testing. During the last half of 2019, the project plan targeted parallel processing of our existing allowance for loan losses model compared to the CECL model, as well as model sensitivity analysis, determination of qualitative adjustments, supporting analytics, and execution of the governance and approval process. Internal controls related to the CECL process were finalized prior to adoption on January 1, 2020. The CECL modeling measurements for estimating the current expected life-time credit losses for loans and debt securities includes the following major items: • Initial loss forecast – using a forecast period of one year for all allowance portfolio segments and off-balance-sheet credit exposures, using forward-looking economic scenarios of expected losses. • Historical loss forecast – for a period incorporating the remaining contractual life, adjusted for prepayments, and the changes in various economic variables during representative historical and recessionary periods. • Reversion period – using two years, which links the initial loss forecast to the historical loss forecast based on economic conditions at the measurement date. • Discounted cash flow aggregator – using the items above to estimate the life-time credit losses for all portfolios and losses for loans modified as a TDR. Old National adopted CECL on January 1, 2020 using the modified retrospective method for all financial assets measured at amortized cost and off-balance-sheet credit exposures. Results for the reporting periods after January 1, 2020 are presented under Topic 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. As of that date, Old National increased the allowance for credit losses for loans by $41.3 million and increased the allowance for credit losses for unfunded loan commitments by $4.5 million, since the ASU covers credit losses over the expected life of a loan as well as considering future changes in macroeconomic conditions. The increase related to the acquired loan portfolio totaled $27.1 million. Under the previously applicable accounting guidance, any remaining unamortized loan discount on an individual loan could be used to offset a charge-off for that loan, so the allowance for loan losses needed for the acquired loans was reduced by the remaining loan discounts. ASU 2016-13 requires an allowance for credit losses to be recognized in addition to the loan discount. The impact of adopting the ASU, and at each subsequent reporting period, is highly dependent on credit quality, macroeconomic forecasts and conditions, composition of our loans and available-for-sale securities portfolio, along with other management judgements. As of January 1, 2020, Old National recorded a cumulative-effect adjustment of $31.2 million to decrease retained earnings. Old National did not record an allowance for credit losses on its available-for-sale debt securities under the newly codified available-for-sale debt security impairment model, as the majority of these securities are government agency-backed securities for which the risk of loss is minimal. We adopted CECL using the prospective transition approach for financial assets purchased with credit deterioration (“PCD”) that were previously classified as purchased credit impaired and accounted for under ASC 310-30. In accordance with the standard, we did not reassess whether PCI assets met the definition of PCD assets as of the date of adoption. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $4.5 million to the allowance for credit losses for loans. The remaining noncredit discount in the amount of $11.8 million (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, 2020. 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 for loans. The allowance for credit losses was calculated by pooling loans of similar credit risk characteristics and credit monitoring procedures. The four loan portfolios are classified into seven segments of loans - commercial, commercial real estate, BBCC, residential real estate, indirect, direct, and home equity. 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 composition of loans by portfolio segment as of December 31, 2019 follows: (dollars in thousands) December 31, 2019 Segment December 31, 2019 Loans: Commercial $ 2,890,296 $ (75,142) $ 2,815,154 Commercial real estate 5,166,792 (277,539) 4,889,253 BBCC N/A 352,681 352,681 Residential real estate 2,334,289 — 2,334,289 Consumer 1,726,147 (1,726,147) N/A Indirect N/A 935,584 935,584 Direct N/A 228,524 228,524 Home equity N/A 562,039 562,039 Total $ 12,117,524 $ — $ 12,117,524 Allowance: Commercial $ (22,585) $ 1,226 $ (21,359) Commercial real estate (21,588) 1,053 (20,535) BBCC N/A (2,279) (2,279) Residential real estate (2,299) — (2,299) Consumer (8,147) 8,147 N/A Indirect N/A (5,319) (5,319) Direct N/A (1,863) (1,863) Home equity N/A (965) (965) Total $ (54,619) $ — $ (54,619) The following table illustrates the impact of adoption of the ASU: (dollars in thousands) December 31, 2019 Impact of January 1, 2020 Assets: Loans, net of unearned income: Commercial $ 2,815,154 $ 2,679 $ 2,817,833 Commercial real estate 4,889,253 1,637 4,890,890 BBCC 352,681 33 352,714 Residential real estate 2,334,289 105 2,334,394 Indirect 935,584 10 935,594 Direct 228,524 2 228,526 Home equity 562,039 12 562,051 Total 12,117,524 4,478 12,122,002 Allowance: Commercial (21,359) (7,150) (28,509) Commercial real estate (20,535) (25,548) (46,083) BBCC (2,279) (3,702) (5,981) Residential real estate (2,299) (6,986) (9,285) Indirect (5,319) 1,669 (3,650) Direct (1,863) 1,059 (804) Home equity (965) (689) (1,654) Total allowance for credit losses on loans (54,619) (41,347) (95,966) Net loans $ 12,062,905 $ (36,869) $ 12,026,036 Net deferred tax assets $ 29,705 $ 10,268 $ 39,973 Liabilities: Allowance for credit losses on unfunded loan commitments $ 2,656 $ 4,549 $ 7,205 Shareholders' equity: Retained earnings $ 682,185 $ (31,150) $ 651,035 In December 2018, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC approved a final rule to address changes to credit loss accounting under GAAP, including banking organizations’ implementation of CECL. The final rule provides banking organizations the option to phase in over a three-year period the day-one adverse effects on regulatory capital that may result from the adoption of the new accounting standard. In March 2020, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC published an interim final rule to delay the estimated impact on regulatory capital stemming from the implementation of CECL. The interim final rule maintains the three-year transition option in the previous rule and provides banks the option to delay for two years an estimate of CECL’s effect on regulatory capital, relative to the incurred loss methodology’s effect on regulatory capital, followed by a three-year transition period (five-year transition option). Old National is adopting the capital transition relief over the permissible five-year period. FASB ASC 350 – In January 2017, the FASB issued ASU No. 2017-04, Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment . To simplify the subsequent measurement of goodwill, the amendments eliminate Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, the income tax effects of tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments should be applied on a prospective basis. The nature of and reason for the change in accounting principle should be disclosed upon transition. The amendments in this update became effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 820 – In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement . The updated guidance improves the disclosure requirements on fair value measurements. The ASU removes certain disclosures required by Topic 820 related to transfers between Level 1 and Level 2 of the fair value hierarchy; the policy for timing of transfers between levels; the valuation processes for Level 3 fair value measurements; and for nonpublic entities, the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements held at the end of the reporting period. The ASU modifies certain disclosures required by Topic 820 related to disclosure of transfers into and out of Level 3 of the fair value hierarchy and purchases and issues of Level 3 assets and liabilities for nonpublic entities; the requirement to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly for investments in certain entities that calculate net asset value; and clarification that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The ASU adds certain disclosure requirements related to changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The amendments in this update became effective for fiscal years, and interim periods within those fiscal years beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 350 – In August 2018, the FASB issued ASU No. 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract . The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this update became effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and did not have a material impact on the financial statements. FASB ASC 842 – In March 2019, the FASB issued ASU No. 2019-01, Leases (Topic 842): Codification Improvements . The amendments in ASU No. 2019-01 align the guidance for fair value of the underlying asset by lessors that are not manufacturers or dealers in Topic 842 with that of existing guidance. As a result, the fair value of the underlying asset at lease commencement is its cost, reflecting any volume or trade discounts that may apply. However, if there has been a significant lapse of time between when the underlying asset is acquired and when the lease commences, the definition of fair value in Topic 820, Fair Value Measurement should be applied. ASU No. 2019-01 also requires lessors within the scope of Topic 942, Financial Services—Depository and Lending , to present all “principal payments received under leases” within investing activities. The amendments in this update became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 326, 815, and 825 – In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The amendments related to Topic 326 address accrued interest, transfers between classifications or categories for loans and debt securities, recoveries, vintage disclosures, and contractual extensions and renewal options and became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The improvements and clarifications related to Topic 815 address partial-term fair value hedges of interest-rate risk, amortization, and disclosure of fair value hedge basis adjustments and consideration of hedged contractually specified interest rate under the hypothetical method and became effective for the annual reporting period beginning January 1, 2020. The amendments related to Topic 825 contain various improvements to ASU 2016-01, including scope; held-to-maturity debt securities fair value disclosures; and remeasurement of equity securities at historical exchange rates and became effective for fiscal years and interim periods beginning after December 15, 2019. The amendments in this update did not have a material impact on the financial statements. FASB ASC 326 – In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments—Credit Losses (Topic 326): Targeted Transition Relief. These amendments provide targeted transition relief allowing entities to irrevocably elect the fair value option, on an instrument-by-instrument basis, for certain financial assets (excluding held-to-maturity debt securities) previously measured at amortized cost. In November 2019, the FASB issued 2019-11, Codification Improvements to Topic 326, Financial Instruments—Credit Losses , to make improvements to the credit losses standard. Most significantly, the standard clarifies guidance around how to report expected recoveries for PCD assets. “Expected recoveries” describes a situation in which an organization recognizes a full or partial writeoff of the amortized cost basis of a financial asset, but then later determines that the amount written off, or a portion of that amount, will in fact be recovered. This ASU permits organizations to record expected recoveries on PCD assets. In addition to other narrow technical improvements, the ASU also reinforces existing guidance that prohibits organizations from recognizing negative allowances for available-for-sale debt securities. The amendments in these updates became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the consolidated financial statements. FASB ASC 718 – In November 2019, the FASB issued ASU No. 2019-08, Compensation – Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606): Codification Improvements—Share-Based Consideration Payable to a Customer. This ASU requires companies to measure and classify (on the balance sheet) share-based payments to customers by applying the guidance in Topic 718, Compensation—Stock Compensation . As a result, the amount recorded as a reduction in revenue would be measured based on the grant-date fair value of the share-based payment. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the consolidated financial statements. FASB ASC 326 and 842 – In February 2020, the FASB issued ASU No. 2020-02, Financial Instruments—Credit Losses (Topic 326) and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842). This ASU inserts a paragraph to address the November 2019 issuance of SEC Staff Accounting Bulletin (“SAB”) 119, Accounting for Loan Losses by Registrants Engaged in Lending Activities Subject to FASB ASC Topic 326 . The SAB updates existing staff guidance on developing a systematic methodology for estimating credit losses, and it explains the documentation the staff typically would expect from registrants in support of estimates of current expected credit losses (“CECL”) for lending activities, when material. The amendments in this update became effective upon issuance and 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 the LIBOR or other interbank offered rate on financial reporting. To help with the transition to new reference rates, the ASU provides optional expedients and exceptions for applying GAAP to affected contract modifications and hedge accounting relationships. The main provisions include: • A change in a contract’s reference interest rate would be accounted for as a continuation of that contract rather than as the creation of a new one for contracts, including loans, debt, leases, and other arrangements, that meet specific criteria. • When updating its hedging strategies in response to reference rate reform, an entity would be allowed to preserve its hedge accounting. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. Because the guidance is meant to help entities through the transition period, it will be in effect for a limited time and will not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. The amendments in this ASU are effective March 12, 2020 through December 31, 2022. ASU 2020-04 permits relief solely for reference rate reform actions and permits different elections over the effective date for legacy and new activity. Accordingly, Old National is evaluating and reassessing the elections on a quarterly basis. For current elections in effect regarding the assertion of the probability of forecasted transactions, Old National elects the expedient to assert the probability of the hedged interest payments and receipts regardless of any expected modification in terms related to reference rate reform. Old National believes the adoption of this guidance on activities subsequent to September 30, 2020 through December 31, 2022 will not have a material impact on the consolidated financial statements. Codification Improvements to Financial Instruments – In March 2020, the FASB issued ASU 2020-03, Codification Improvements to Financial Instruments . This ASU was issued to clarify and improve various financial instruments Topics. The amendments include the following improvements: • Issue 1 – Clarifies that all entities are required to provide fair value option disclosures. • Issue 2 – Clarifies the applicability of the portfolio exception in measuring fair value for nonfinancial items accounted for as derivatives. • Issue 3 – Clarifies that disclosure requirements in Topic 320 apply to disclosure requirements in Topic 942 for depository and lending institutions. • Issue 4 – Added cross-reference of line-of-credit or revolving-debt arrangements guidance to guidance in accounting for fees between debtor and creditor and third-party costs directly related to exchanges or modifications of debt instruments. • Issue 5 – Clarifies that fair value measurement disclosure requirements do not apply to entities using the net asset value per share practical expedient. • Issue 6 – Aligns the contractual term to measure expected credit losses for a net investment in a lease under the Credit Loss Standard (Topic 326) with the lease term determined under the Leases Standard (Topic 842). • Issue 7 – Clarifies that when an entity regains control of financial assets sold, an allowance for credit losses should be recorded in accordance with Topic 326. For Issue 1, Issue 2, Issue 4, and Issue 5, the amendments are effective upon issuance and did not have a material impact on the consolidated financial statements. For Issue 3, the amendments to ASU 2016-01 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and did not have a material impact on the consolidated financial statements. For Issues 6 and 7, the amendments to ASU 2016-13 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and did not have a material impact on the consolidated financial statements. Guidance on Non-TDR Loan Modifications due to COVID-19 – On March 22, 2020, a statement was issued by our banking regulators and titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” (the “Interagency Statement”) that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) that passed on March 27, 2020 further provides that a qualified loan modification is exempt by law from classification as a TDR as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak declared by the President of the United States under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. The Interagency Statement was subsequently revised in April 2020 to clarify the interaction of the original guidance with Section 4013 of the CARES Act, as well as setting forth the banking regulators’ views on consumer protection considerations. In accordance with such guidance, we are offering short-term modifications made in response to COVID-19 to borrowers who are current and otherwise not past due. These include short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. See Note 6 for further information on non-TDR loan modifications. Accounting Guidance Issued But Not Yet Adopted FASB ASC 715 – In August 2018, the FASB issued ASU No. 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans . The amendments in this update modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this update become effective for fiscal years ending after December 15, 2020 and will not have a material impact on the consolidated financial statements. FASB ASC 740 – In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU removes specific exceptions to the general principles in Topic 740 in GAAP. It eliminates the need for an organization to analyze whether the following apply in a given period: (1) exception to the incremental approach for intraperiod tax allocation; (2) exceptions to accounting for basis differences when there are ownership changes in foreign investments; and (3) exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The ASU also improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP for: (1) franchise taxes that are partially based on income; (2) transactions with a government that result in a step up in the tax basis of goodwill; (3) separate financial statements of legal entities that are not subject to tax; and (4) enacted changes in tax laws in interim periods. The amendments in this update become effective for fiscal years beginning after December 15, 2020, 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 321, 323, and 815 – In January 2020, the FASB issued ASU No. 2020-01, Investments – Equity Securities (Topic 321), Investments – Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) – Clarifying the Interactions Between Topic 321, Topic 323, and Topic 815 (a Consensus of the Emerging Issues Task Force). The ASU clarifies the interaction between ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities and the ASU on equity method investments. ASU 2016-01 provides companies with an alternative to measure certain equity securities without a readily determinable fair value at cost, minus impairment, if any, unless an observable transaction for an identical or similar security occurs. ASU 2020-01 clarifies that for purposes of applying the Topic 321 measurement alternative, an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting under Topic 323, immediately before applying or upon discontinuing the equity method. In addition, the new ASU provides direction that a company should not consider whether the underlying securities would be accounted for under the equity method or the fair value option when it is determining the accounting for certain forward contracts and purchased options, upon either settlement or exercise. The amendments in this update become effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Early adoption is permitted, and the amendments are to be applied prospectively. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 470 and 815 – In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging— Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity , to clarify the accounting for certain financial instruments with characteristics of liabilities and equity. The amendments in this update reduce the number of accounting models for convertible debt instruments and convertible preferred stock by removing the cash conversion model and the beneficial conversion feature model. Limiting the accounting models will result in fewer embedded conversion features being separately recognized from the host contract. Convertible instruments that continue to be subject to separation models are (1) those with embedded conversion features that are not clearly and closely related to the host contract, that meet the definition of a derivative, and that do not qualify for a scope exception from derivative accounting and (2) convertible debt instruments issued with substantial premiums for which the premiums are recorded as paid-in-capital. In addition, this ASU improves disclosure requirements for convertible instruments and earnings-per-share guidance. The ASU also revises the derivative scope exception guidance to reduce form-over-substance-based accounting conclusions driven by remote contingent events. The amendments in this update are effective for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. Early adoption will be permitted, but no earlier than for fiscal years beginning after December 15, 2020. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. Acquisitions and Dispositions of Businesses and Related Pro Forma Information – In May 2020, the SEC issued a final rule that revises the circumstances that require financial statements and related pro forma information for acquisitions and dispositions of businesses. The intent of the rule is to allow for more meaningful conclusions on when an acquired or disposed business is significant as well as to improve the related disclosure requirements. The changes are intended to improve the financial information about acquired or disposed businesses, facilitate more timely access to capital, and reduce the complexity and costs to prepare the disclosure. The final rule is effective January 1, 2021; however, voluntary early compliance is permitted.

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Net Income Per Share	NET INCOME PER SHAREBasic and diluted net income per share are calculated using the two-class method. Net income 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 is then divided by the weighted-average number of common shares and common share equivalents during the period. The following table reconciles basic and diluted net income per share: Three Months Ended Nine Months Ended (dollars and shares in thousands, except per share data) 2020 2019 2020 2019 Basic Net Income Per Share Net income $ 77,944 $ 69,781 $ 152,289 $ 189,021 Weighted average common shares outstanding 164,773 170,746 165,748 172,807 Basic Net Income Per Share $ 0.47 $ 0.41 $ 0.92 $ 1.10 Diluted Net Income Per Share Net income $ 77,944 $ 69,781 $ 152,289 $ 189,021 Weighted average common shares outstanding 164,773 170,746 165,748 172,807 Effect of dilutive securities: Restricted stock 611 761 586 672 Stock options and appreciation rights 35 44 36 48 Weighted average shares outstanding 165,419 171,551 166,370 173,527 Diluted Net Income Per Share $ 0.47 $ 0.41 $ 0.92 $ 1.09

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The following table summarizes the amortized cost, fair value, and allowance for credit losses of the available-for-sale investment securities portfolio and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income (loss): (dollars in thousands) Amortized Unrealized Unrealized Allowance for Fair September 30, 2020 Available-for-Sale U.S. Treasury $ 9,899 $ 331 $ — $ — $ 10,230 U.S. government-sponsored entities and agencies 488,768 3,700 (927) — 491,541 Mortgage-backed securities - Agency 3,280,249 102,975 (944) — 3,382,280 States and political subdivisions 1,351,122 76,138 (765) — 1,426,495 Pooled trust preferred securities 13,773 — (6,246) — 7,527 Other securities 270,166 14,085 (790) — 283,461 Total available-for-sale securities $ 5,413,977 $ 197,229 $ (9,672) $ — $ 5,601,534 December 31, 2019 Available-for-Sale U.S. Treasury $ 17,567 $ 117 $ (2) $ — $ 17,682 U.S. government-sponsored entities and agencies 596,595 1,027 (4,638) — 592,984 Mortgage-backed securities - Agency 3,151,550 41,363 (9,052) — 3,183,861 States and political subdivisions 1,232,497 44,193 (1,047) — 1,275,643 Pooled trust preferred securities 13,811 — (5,589) — 8,222 Other securities 301,189 6,842 (1,332) — 306,699 Total available-for-sale securities $ 5,313,209 $ 93,542 $ (21,660) $ — $ 5,385,091 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) 2020 2019 2020 2019 Proceeds from sales of available-for-sale debt securities $ 39,637 $ 27,983 $ 296,075 $ 295,615 Proceeds from calls of available-for-sale debt securities 82,410 316,361 388,145 378,476 Total $ 122,047 $ 344,344 $ 684,220 $ 674,091 Realized gains on sales of available-for-sale debt securities $ 4,942 $ 340 $ 11,082 $ 3,443 Realized gains on calls of available-for-sale debt securities 10 86 50 89 Realized losses on sales of available-for-sale debt securities (30) (2) (500) (2,017) Realized losses on calls of available-for-sale debt securities (1) — (26) (29) Debt securities gains (losses), net $ 4,921 $ 424 $ 10,606 $ 1,486 All of the mortgage-backed securities in the investment portfolio are residential mortgage-backed securities. The amortized cost and fair value of the investment securities portfolio are shown 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, 2020 (dollars in thousands) Amortized Fair Weighted Maturity Available-for-Sale Within one year $ 479,460 $ 488,426 2.49 % One to five years 2,808,889 2,909,519 2.38 Five to ten years 750,252 772,598 2.50 Beyond ten years 1,375,376 1,430,991 3.05 Total $ 5,413,977 $ 5,601,534 2.58 % 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, 2020 Available-for-Sale U.S. government-sponsored entities $ 218,352 $ (927) $ — $ — $ 218,352 $ (927) Mortgage-backed securities - Agency 300,451 (834) 3,516 (110) 303,967 (944) States and political subdivisions 60,513 (765) — — 60,513 (765) Pooled trust preferred securities — — 7,527 (6,246) 7,527 (6,246) Other securities 27,574 (175) 20,615 (615) 48,189 (790) Total available-for-sale $ 606,890 $ (2,701) $ 31,658 $ (6,971) $ 638,548 $ (9,672) December 31, 2019 Available-for-Sale U.S. Treasury $ 999 $ (2) $ — $ — $ 999 $ (2) U.S. government-sponsored entities 357,647 (4,638) — — 357,647 (4,638) Mortgage-backed securities - Agency 786,245 (6,122) 212,056 (2,930) 998,301 (9,052) States and political subdivisions 120,166 (1,016) 7,006 (31) 127,172 (1,047) Pooled trust preferred securities — — 8,222 (5,589) 8,222 (5,589) Other securities 30,765 (182) 87,066 (1,150) 117,831 (1,332) Total available-for-sale $ 1,295,822 $ (11,960) $ 314,350 $ (9,700) $ 1,610,172 $ (21,660) Available-for-sale debt securities in unrealized loss positions are evaluated for impairment related to credit losses at least quarterly. For available-for sale debt securities in an unrealized loss position, we first assess whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For available-for sale debt securities that do not meet the criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security and the issuer, among other factors. If this assessment indicates that a credit loss exists, we compare the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an allowance for credit losses is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of applicable taxes. No allowance for credit losses for available-for-sale debt securities was needed at September 30, 2020. Accrued interest receivable on available-for-sale debt securities totaled $22.4 million at September 30, 2020 and is excluded from the estimate of credit losses. The U.S. government sponsored entities and agencies and mortgage-backed securities – agency 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. Prior to the adoption of ASC 326, there was no OTTI recorded during the nine months ended September 30, 2019. At September 30, 2020, Old National’s securities portfolio consisted of 1,854 securities, 103 of which were in an unrealized loss position. The unrealized losses attributable to our 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. Our pooled trust preferred securities are discussed below. At September 30, 2020, 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. Pooled Trust Preferred Securities At September 30, 2020, our securities portfolio contained two pooled trust preferred securities with a fair value of $7.5 million and unrealized losses of $6.2 million. These securities are evaluated using collateral-specific assumptions to estimate the expected future interest and principal cash flows. For the nine months ended September 30, 2020 and 2019, we did not recognize any losses on these securities. The table below summarizes the relevant characteristics of our pooled trust preferred securities as well as our single issuer trust preferred securities that are included in the “other securities” category in this footnote. Each of the pooled trust preferred securities support a more senior tranche of security holders. Both pooled trust preferred securities 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. (dollars in thousands) Class Lowest Amortized Fair Unrealized # of Issuers Actual Expected Excess September 30, 2020 Pooled trust preferred securities: Pretsl XXVII LTD B B $ 4,238 $ 2,228 $ (2,010) 32/41 14.4% 10.8% 33.4% Trapeza Ser 13A A2A BBB 9,535 5,299 (4,236) 39/41 4.5% 6.4% 52.1% 13,773 7,527 (6,246) Single Issuer trust preferred securities: JP Morgan Chase & Co BBB- 4,806 4,412 (394) Total $ 18,579 $ 11,939 $ (6,640) (1) Lowest rating for the security provided by any nationally recognized credit rating agency. Equity Securities Old National's equity securities with readily determinable fair values totaled $2.5 million at September 30, 2020 and $6.8 million at December 31, 2019. There were gains on equity securities of $0.5 million during the three months ended September 30, 2020 and $1.3 million during the nine months ended September 30, 2020, compared to gains of $0.2 million during the three months ended September 30, 2019 and $0.4 million during the nine months ended September 30, 2019. Old National also has equity securities without readily determinable fair values that are included in other assets that totaled $95.4 million at September 30, 2020 and $91.4 million at December 31, 2019. These are illiquid investments that consist of partnerships, limited liability companies, and other ownership interests that support affordable housing, economic development, and community revitalization initiatives in low-to-moderate income neighborhoods. There have been no impairments or adjustments on these securities in the three or nine months ended September 30, 2020 or 2019.

Loans Held for Sale

Loans Held for Sale	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Loans Held for Sale	LOANS HELD FOR SALEMortgage loans held for immediate sale in the secondary market were $85.1 million at September 30, 2020, compared to $46.9 million at December 31, 2019.  Residential loans that Old National has originated with the intent to sell are recorded at fair value.  Conventional mortgage production is sold on a servicing retained basis.  Certain loans, such as government guaranteed mortgage loans are sold on servicing released basis.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
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 various industries, including manufacturing, agribusiness, transportation, mining, wholesaling, and retailing. Most of Old National’s lending activity occurs within our principal geographic markets of Indiana, Kentucky, Michigan, Wisconsin, and Minnesota. Old National manages concentrations of credit exposure by industry, product, geography, customer relationship, and loan size. While loans to lessors of both residential and non-residential real estate exceed 10% of total loans, no individual sub-segment category within those broader categories reaches the 10% threshold. 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 for loans. The allowance for credit losses was calculated by pooling loans of similar credit risk characteristics and credit monitoring procedures. The four loan portfolios are classified into seven segments of loans - commercial, commercial real estate, BBCC, residential real estate, indirect, direct, and home equity. 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 composition of loans by portfolio segment as of September 30, 2020 follows: September 30, 2020 Segment September 30, 2020 Statement Portfolio After (dollars in thousands) Balance Reclassifications Reclassifications Loans: Commercial $ 4,264,568 $ (196,226) $ 4,068,342 Commercial real estate 5,701,493 (170,581) 5,530,912 BBCC N/A 366,807 366,807 Residential real estate 2,265,299 — 2,265,299 Consumer 1,661,149 (1,661,149) N/A Indirect N/A 932,759 932,759 Direct N/A 179,275 179,275 Home equity N/A 549,115 549,115 Total $ 13,892,509 $ — $ 13,892,509 The composition of loans by portfolio segment follows: (dollars in thousands) September 30, January 1, Commercial (1) (2) $ 4,068,342 $ 2,817,833 Commercial real estate 5,530,912 4,890,890 BBCC 366,807 352,714 Residential real estate 2,265,299 2,334,394 Indirect 932,759 935,594 Direct 179,275 228,526 Home equity 549,115 562,051 Total loans 13,892,509 12,122,002 Allowance for credit losses (131,388) (95,966) Net loans $ 13,761,121 $ 12,026,036 (1) Includes direct finance leases of $34.4 million at September 30, 2020 and $47.2 million at January 1, 2020. (2) Includes PPP loans of $1.479 billion at September 30, 2020. 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 customers. Section 1102 of the CARES Act created the Paycheck Protection Program (“PPP”), a program administered by the Small Business Administration (the “SBA”) to provide loans to small businesses for payroll and other basic expenses during the COVID-19 pandemic. Old National has participated in the PPP as a lender. These loans are eligible to be forgiven if certain conditions are satisfied and are fully guaranteed by the SBA. Additionally, loan payments will also be deferred for the first six months of the loan term. The PPP commenced on April 3, 2020 and was available to qualified borrowers through August 8, 2020. No collateral or personal guarantees are required. Neither the government nor lenders are permitted to charge the recipients any fees. Old National began accepting applications from qualified borrowers on April 3, 2020 and as of September 30, 2020 has originated over 9,700 loans with balances in excess of $1.5 billion to new and existing clients through the PPP. 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 220%, Old National Bank’s commercial real estate loans as a percentage of its risk-based capital remained well below the regulatory guideline limit of 300% at September 30, 2020. 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 changes in economic conditions such as 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 for 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 for 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. We have made a policy election to report accrued interest receivable as a separate line item on the balance sheet. Accrued interest receivable on loans totaled $59.5 million at September 30, 2020 and is excluded from the estimate of credit losses. The allowance for credit loss estimation process involves procedures to appropriately consider the unique characteristics of its loan portfolio segments. These segments are further disaggregated into loan classes, 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. See Note 2 for more information about CECL for loans and unfunded loan commitments. The allowance for credit losses increased for the three months ended September 30, 2020 primarily due to net recoveries of $3.0 million for the quarter. The allowance for credit losses increased for the nine months ended September 30, 2020 primarily due to macroeconomic factors surrounding the COVID-19 pandemic. The forecast scenario includes slightly elevated unemployment, which is forecasted to increase through the fourth quarter of 2020. In addition to the quantitative inputs, several qualitative factors were considered, including the risk that unemployment and gross domestic product, prove to be more severe and/or prolonged than our baseline forecast. The mitigating impact of potential future rounds of fiscal stimulus, including direct payments to individuals, increased unemployment benefits, as well as the various government sponsored loan programs, was also considered. Old National’s activity in the allowance for credit losses for loans by portfolio segment for the three and nine months ended September 30, 2020 was as follows: (dollars in thousands) Balance at Impact of Sub-Total Charge-offs Recoveries Provision Balance at Three Months Ended Commercial $ 29,618 $ — $ 29,618 $ (128) $ 2,192 $ (3,289) $ 28,393 Commercial real estate 71,069 — 71,069 (2,709) 3,379 4,173 75,912 BBCC 6,332 — 6,332 (10) — 15 6,337 Residential real estate 14,244 — 14,244 (321) 220 (219) 13,924 Indirect 4,453 — 4,453 (556) 587 (394) 4,090 Direct 835 — 835 (445) 187 248 825 Home equity 1,843 — 1,843 — 598 (534) 1,907 Total allowance for credit losses $ 128,394 $ — $ 128,394 $ (4,169) $ 7,163 $ — $ 131,388 Nine Months Ended Commercial $ 21,359 $ 7,150 $ 28,509 $ (5,303) $ 3,100 $ 2,087 $ 28,393 Commercial real estate 20,535 25,548 46,083 (5,164) 4,297 30,696 75,912 BBCC 2,279 3,702 5,981 (92) 122 326 6,337 Residential real estate 2,299 6,986 9,285 (637) 431 4,845 13,924 Indirect 5,319 (1,669) 3,650 (2,125) 1,494 1,071 4,090 Direct 1,863 (1,059) 804 (1,326) 571 776 825 Home equity 965 689 1,654 (199) 758 (306) 1,907 Total allowance for credit losses $ 54,619 $ 41,347 $ 95,966 $ (14,846) $ 10,773 $ 39,495 $ 131,388 The reduction in provision for the three months ended September 30, 2020 for the commercial portfolio was primarily due to net recoveries in the portfolio. The reduction in the provision for the commercial portfolio was offset by an increase in provision in the commercial real estate portfolio reflecting an increase in balances in the commercial real estate portfolio. PPP loans were factored in the provision for credit losses for the three and nine months ended September 30, 2020; however, due to the SBA guaranty and our borrowers’ adherence to the PPP terms, the provision impact was insignificant. Unfunded Loan Commitments Old National maintains an allowance for credit losses on unfunded commercial lending commitments and letters of credit 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 for 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. Old National’s activity in the allowance for credit losses on unfunded loan commitments for the three and nine months ended September 30, 2020 was as follows: (dollars in thousands) Three Months Ended Nine Months Ended Allowance for credit losses on unfunded loan commitments: Balance at beginning of period $ 11,026 $ 2,656 Impact of adopting ASC 326 — 4,549 Sub-Total 11,026 7,205 Expense (reversal of expense) for credit losses — 3,821 Balance at end of period $ 11,026 $ 11,026 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 risk category of commercial, commercial real estate, and BBCC loans by loan portfolio segment and class of loan: Risk Rating (dollars in thousands) Pass Criticized Classified - Classified - Classified - Total September 30, 2020 Commercial: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 272,695 $ 6,083 $ 8,391 $ 3,010 $ 1,200 $ 291,379 2016 124,413 3,633 2,814 492 — 131,352 2017 250,815 8,739 12,156 9,984 183 281,877 2018 199,031 12,840 8,659 5,207 684 226,421 2019 480,653 9,420 6,145 4,094 — 500,312 2020 1,932,380 15,371 6,455 829 — 1,955,035 Revolving Loans 477,815 12,160 18,231 2,433 — 510,639 Revolving to Term Loans 155,265 3,226 6,765 6,071 — 171,327 Total $ 3,893,067 $ 71,472 $ 69,616 $ 32,120 $ 2,067 $ 4,068,342 Commercial real estate: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 615,539 $ 22,234 $ 18,466 $ 12,753 $ 3,672 $ 672,664 2016 533,045 17,147 7,012 2,308 19,637 579,149 2017 717,345 72,598 31,695 12,282 8,674 842,594 2018 829,583 20,181 16,511 4,206 — 870,481 2019 1,073,991 39,005 4,246 2,108 1,876 1,121,226 2020 1,042,060 2,361 12,538 — — 1,056,959 Revolving Loans 29,581 — — — — 29,581 Revolving to Term Loans 334,075 19,767 4,075 341 — 358,258 Total $ 5,175,219 $ 193,293 $ 94,543 $ 33,998 $ 33,859 $ 5,530,912 BBCC: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 8,607 $ — $ — $ — $ 89 $ 8,696 2016 27,306 716 45 106 — 28,173 2017 39,173 479 266 520 — 40,438 2018 54,175 821 40 230 392 55,658 2019 79,760 1,638 622 357 77 82,454 2020 70,997 1,519 386 111 — 73,013 Revolving Loans 51,601 1,891 341 139 — 53,972 Revolving to Term Loans 20,864 1,030 929 1,580 — 24,403 Total $ 352,483 $ 8,094 $ 2,629 $ 3,043 $ 558 $ 366,807 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 in residential real estate and consumer loans based on payment activity: Payment Performance (dollars in thousands) Performing Nonperforming Total September 30, 2020 Residential real estate: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 698,318 $ 19,336 $ 717,654 2016 228,088 2,807 230,895 2017 226,483 696 227,179 2018 153,172 836 154,008 2019 498,685 175 498,860 2020 436,512 65 436,577 Revolving Loans — — — Revolving to Term Loans 126 — 126 Total $ 2,241,384 $ 23,915 $ 2,265,299 Indirect: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 28,932 $ 198 $ 29,130 2016 66,145 572 66,717 2017 114,557 828 115,385 2018 155,493 628 156,121 2019 282,501 336 282,837 2020 282,427 57 282,484 Revolving Loans — — — Revolving to Term Loans 85 — 85 Total $ 930,140 $ 2,619 $ 932,759 Direct: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 22,077 $ 571 $ 22,648 2016 10,770 247 11,017 2017 19,894 113 20,007 2018 35,257 183 35,440 2019 34,149 79 34,228 2020 30,053 71 30,124 Revolving Loans 24,110 — 24,110 Revolving to Term Loans 1,700 1 1,701 Total $ 178,010 $ 1,265 $ 179,275 Home equity: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 61 $ 171 $ 232 2016 244 11 255 2017 936 43 979 2018 662 — 662 2019 1,091 29 1,120 2020 — 20 20 Revolving Loans 521,932 — 521,932 Revolving to Term Loans 20,022 3,893 23,915 Total $ 544,948 $ 4,167 $ 549,115 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 as of September 30, 2020 by class of loans: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2020 Commercial $ 622 $ 2,594 $ 2,233 $ 5,449 $ 4,062,893 $ 4,068,342 Commercial Real Estate 310 21,118 23,572 45,000 5,485,912 5,530,912 BBCC 31 77 494 602 366,205 366,807 Residential 14,508 3,950 7,833 26,291 2,239,008 2,265,299 Indirect 3,729 732 449 4,910 927,849 932,759 Direct 1,698 203 306 2,207 177,068 179,275 Home equity 861 137 1,258 2,256 546,859 549,115 Total $ 21,759 $ 28,811 $ 36,145 $ 86,715 $ 13,805,794 $ 13,892,509 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: January 1, 2020 June 30, 2020 September 30, 2020 (dollars in thousands) Nonaccrual Nonaccrual Nonaccrual Nonaccrual Past Due Commercial $ 40,103 $ 37,785 $ 34,188 $ 3,543 $ 38 Commercial Real Estate 58,350 51,100 67,859 31,606 20 BBCC 4,530 4,048 3,601 — — Residential 20,970 24,315 23,914 — — Indirect 3,318 2,835 2,619 — 30 Direct 1,303 1,137 1,264 54 2 Home equity 3,857 4,326 4,166 — — Total $ 132,431 $ 125,546 $ 137,611 $ 35,203 $ 90 Interest income recognized on nonaccrual loans was insignificant during the three and nine months ended September 30, 2020. 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, 2020 Commercial $ 8,425 $ 18,624 $ 5,560 $ 530 $ 1,048 Commercial Real Estate 52,911 85 1,165 — 13,698 BBCC 1,716 1,665 70 146 5 Residential 23,914 — — — — Indirect — — — 2,619 — Direct 1,005 — 2 247 5 Home equity 4,166 — — — — Total loans $ 92,137 $ 20,374 $ 6,797 $ 3,542 $ 14,756 Loan Participations Old National has loan participations, which qualify as participating interests, with other financial institutions. At September 30, 2020, these loans totaled $874.0 million, of which $392.9 million had been sold to other financial institutions and $481.1 million 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. Troubled Debt Restructurings Old National may choose to restructure the contractual terms of certain loans. The decision to restructure a loan, versus aggressively enforcing the collection of the loan, may benefit Old National by increasing the ultimate probability of collection. Any loans that are modified are reviewed by Old National to identify if a TDR has occurred, which is when for economic or legal reasons related to a borrower’s financial difficulties, Old National Bank grants a concession to the borrower that it would not otherwise consider. 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 include one or a combination of the following: a reduction of the stated interest rate of the loan, an extension of the maturity date at a stated rate of interest lower than the current market rate of new debt with similar risk, or a permanent reduction of the recorded investment of the loan. Loans modified in a TDR are typically placed on nonaccrual status until we determine the future collection of principal and interest is reasonably assured, which generally requires that the borrower demonstrate a period of performance according to the restructured terms for 6 months. If we are unable to resolve a nonperforming loan issue, the credit will be charged off when it is apparent there will be a loss. For large commercial type loans, each relationship is individually analyzed for evidence of apparent loss based on quantitative benchmarks or subjectively based upon certain events or particular circumstances. Generally, Old National charges off small commercial loans scored through our small business credit center with contractual balances under $250,000 that are 90 days or more delinquent and do not have adequate collateral support. For residential and consumer loans, a charge off is recorded at the time foreclosure is initiated or when the loan becomes 120 to 180 days past due, whichever is earlier. For commercial TDRs, an allocated reserve is established within the allowance for credit losses for the difference between the carrying value of the loan and its computed value. To determine the computed value of the loan, one of the following methods is selected: (1) the present value of expected cash flows discounted at the loan’s original effective interest rate, (2) the loan’s observable market price, or (3) the fair value of the collateral, if the loan is collateral dependent. The allocated reserve is established as the difference between the carrying value of the loan and the collectable value. If there are significant changes in the amount or timing of the loan’s expected future cash flows, impairment is recalculated and the valuation allowance is adjusted accordingly. When a residential or consumer loan is identified as a TDR, the loan is typically written down to its collateral value less selling costs. The following table presents activity in TDRs: (dollars in thousands) Beginning (Charge-offs)/ (Payments)/ Additions Ending Three Months Ended September 30, 2020 Commercial $ 10,598 $ 1,326 $ (3,168) $ — $ 8,756 Commercial Real Estate 12,706 1,993 (3,950) 5,907 16,656 BBCC 147 (52) 43 — 138 Residential 3,012 — (171) — 2,841 Indirect — 2 (2) — — Direct 779 (11) (18) — 750 Home equity 367 1 (77) — 291 Total $ 27,609 $ 3,259 $ (7,343) $ 5,907 $ 29,432 Nine Months Ended September 30, 2020 Commercial $ 12,412 $ 632 $ (4,288) $ — $ 8,756 Commercial Real Estate 14,277 741 (4,269) 5,907 16,656 BBCC 578 (22) (418) — 138 Residential 3,107 — (266) — 2,841 Indirect — 7 (7) — — Direct 983 (9) (224) — 750 Home equity 381 2 (92) — 291 Total $ 31,738 $ 1,351 $ (9,564) $ 5,907 $ 29,432 TDRs included within nonaccrual loans totaled $7.7 million at September 30, 2020 and $13.8 million at December 31, 2019. Old National has allocated specific reserves to customers whose loan terms have been modified as TDRs totaling $0.3 million at September 30, 2020 and $0.9 million at December 31, 2019. At September 30, 2020, Old National had committed to lend an additional $0.8 million to customers with outstanding loans that are classified as TDRs, compared to $2.3 million at December 31, 2019. The pre-modification and post-modification outstanding recorded investments of loans modified as TDRs during the nine months ended September 30, 2020 and 2019 are the same except for when the loan modifications involve the forgiveness of principal. The following table presents loans modified as TDRs that occurred during the nine months ended September 30, 2020 and 2019: (dollars in thousands) Total Nine Months Ended September 30, 2020 TDR: Number of loans 1 Pre-modification outstanding recorded investment $ 5,907 Post-modification outstanding recorded investment 5,907 Nine Months Ended September 30, 2019 TDR: Number of loans 14 Pre-modification outstanding recorded investment $ 21,132 Post-modification outstanding recorded investment 21,132 The TDRs that occurred during the nine months ended September 30, 2020 increased the allowance for credit losses by $0.3 million and resulted in no charge-offs. The TDRs that occurred during the nine months ended September 30, 2019 decreased the allowance for loan losses by $0.7 million and resulted in no charge-offs. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. TDRs for which there was a payment default within twelve months following the modification were insignificant during the nine months ended September 30, 2020 and 2019. The terms of certain other loans were modified during 2020 and 2019 that did not meet the definition of a TDR. It is our process to review all classified and criticized loans that, during the period, have been renewed, have entered into a forbearance agreement, have gone from principal and interest to interest only, or have extended the maturity date. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on its debt in the foreseeable future without the modification. The evaluation is performed under our internal underwriting policy. We also

Other Real Estate Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2020
Banking and Thrift [Abstract]
Other Real Estate Owned	OTHER REAL ESTATE OWNED Other real estate owned is included in other assets. The following table presents activity in other real estate owned: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 1,786 $ 2,819 $ 2,169 $ 3,232 Additions 368 411 572 1,084 Sales (843) (271) (1,267) (1,248) Impairments (63) (18) (226) (127) Balance at end of period (1) $ 1,248 $ 2,941 $ 1,248 $ 2,941 (1) Includes repossessed personal property of $0.2 million at September 30, 2020 and $0.5 million at September 30, 2019. Foreclosed residential real estate property recorded as a result of obtaining physical possession of the property included in the table above totaled $0.8 million at September 30, 2020 and $0.5 million at December 31, 2019. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $2.9 million at September 30, 2020 and $3.7 million at December 31, 2019.

Premises and Equipment

Premises and Equipment	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	PREMISES AND EQUIPMENT The composition of premises and equipment was as follows: (dollars in thousands) September 30, December 31, Land $ 72,451 $ 79,569 Buildings 372,746 380,925 Furniture, fixtures, and equipment 108,323 112,654 Leasehold improvements 44,108 44,136 Total 597,628 617,284 Accumulated depreciation (134,375) (126,359) Premises and equipment, net $ 463,253 $ 490,925 Depreciation expense was $6.8 million for the three months ended September 30, 2020 and $21.8 million for the nine months ended September 30, 2020, compared to $6.8 million for the three months ended September 30, 2019 and $20.0 million for the nine months ended September 30, 2019. Finance Leases Old National leases certain branch buildings under finance leases that are included in premises and equipment. See Notes 9 and 15 to the consolidated financial statements for detail regarding these leases.

Leases

Leases	9 Months Ended
	Sep. 30, 2020
Lessee Disclosure [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 10 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) 2020 2019 2020 2019 Operating lease cost occupancy/equipment expense $ 3,952 $ 4,280 $ 19,786 $ 12,973 Finance lease cost: Amortization of right-of-use assets occupancy expense 311 166 733 485 Interest on lease liabilities interest expense 98 80 267 241 Short-term lease cost occupancy expense — 1 — 2 Sub-lease income occupancy expense (129) (193) (378) (553) Total $ 4,232 $ 4,334 $ 20,408 $ 13,148 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 $ 77,482 $ 95,477 Operating lease liabilities 88,552 99,500 Finance Leases Premises and equipment, net 11,662 7,170 Other borrowings 12,062 7,406 Weighted-Average Remaining Lease Term (in Years) Operating leases 10.6 10.6 Finance leases 10.5 11.3 Weighted-Average Discount Rate Operating leases 3.40 % 3.45 % Finance leases 3.45 % 4.43 % Supplemental cash flow information related to leases was as follows: Nine Months Ended (dollars in thousands) 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12,194 $ 13,201 Operating cash flows from finance leases 267 241 Financing cash flows from finance leases 569 344 The following table presents a maturity analysis of the Company’s lease liability by lease classification at September 30, 2020: (dollars in thousands) Operating Finance 2020 $ 3,735 $ 346 2021 14,344 1,394 2022 13,277 1,412 2023 9,244 1,438 2024 8,073 1,444 Thereafter 57,791 8,442 Total undiscounted lease payments 106,464 14,476 Amounts representing interest (17,912) (2,414) Lease liability $ 88,552 $ 12,062 Old National leases certain office space and buildings to unrelated parties in exchange for consideration. All of these tenant leases are classified as operating leases. The following table presents a maturity analysis of the Company’s tenant leases at September 30, 2020: (dollars in thousands) Tenant Leases 2020 $ 628 2021 2,327 2022 1,878 2023 1,523 2024 1,409 Thereafter 2,520 Total undiscounted lease payments $ 10,285
Leases	LEASES Old National has operating and finance leases for land, office space, banking centers, and equipment. These leases are generally for periods of 10 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) 2020 2019 2020 2019 Operating lease cost occupancy/equipment expense $ 3,952 $ 4,280 $ 19,786 $ 12,973 Finance lease cost: Amortization of right-of-use assets occupancy expense 311 166 733 485 Interest on lease liabilities interest expense 98 80 267 241 Short-term lease cost occupancy expense — 1 — 2 Sub-lease income occupancy expense (129) (193) (378) (553) Total $ 4,232 $ 4,334 $ 20,408 $ 13,148 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 $ 77,482 $ 95,477 Operating lease liabilities 88,552 99,500 Finance Leases Premises and equipment, net 11,662 7,170 Other borrowings 12,062 7,406 Weighted-Average Remaining Lease Term (in Years) Operating leases 10.6 10.6 Finance leases 10.5 11.3 Weighted-Average Discount Rate Operating leases 3.40 % 3.45 % Finance leases 3.45 % 4.43 % Supplemental cash flow information related to leases was as follows: Nine Months Ended (dollars in thousands) 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12,194 $ 13,201 Operating cash flows from finance leases 267 241 Financing cash flows from finance leases 569 344 The following table presents a maturity analysis of the Company’s lease liability by lease classification at September 30, 2020: (dollars in thousands) Operating Finance 2020 $ 3,735 $ 346 2021 14,344 1,394 2022 13,277 1,412 2023 9,244 1,438 2024 8,073 1,444 Thereafter 57,791 8,442 Total undiscounted lease payments 106,464 14,476 Amounts representing interest (17,912) (2,414) Lease liability $ 88,552 $ 12,062 Old National leases certain office space and buildings to unrelated parties in exchange for consideration. All of these tenant leases are classified as operating leases. The following table presents a maturity analysis of the Company’s tenant leases at September 30, 2020: (dollars in thousands) Tenant Leases 2020 $ 628 2021 2,327 2022 1,878 2023 1,523 2024 1,409 Thereafter 2,520 Total undiscounted lease payments $ 10,285

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS The following table shows the changes in the carrying amount of goodwill: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 1,036,994 $ 1,036,258 $ 1,036,994 $ 1,036,258 Acquisitions and adjustments — 736 — 736 Balance at end of period $ 1,036,994 $ 1,036,994 $ 1,036,994 $ 1,036,994 Old National performed the required annual goodwill impairment test as of August 31, 2020 and there was no impairment. No events or circumstances since the August 31, 2020 annual impairment test were noted that would indicate it was more likely than not a goodwill impairment exists. The gross carrying amount and accumulated amortization of other intangible assets were as follows: (dollars in thousands) Gross Accumulated Net September 30, 2020 Core deposit $ 112,723 $ (66,651) $ 46,072 Customer trust relationships 16,547 (13,361) 3,186 Total intangible assets $ 129,270 $ (80,012) $ 49,258 December 31, 2019 Core deposit $ 119,051 $ (63,020) $ 56,031 Customer trust relationships 16,547 (12,473) 4,074 Total intangible assets $ 135,598 $ (75,493) $ 60,105 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, 2020 or 2019. Total amortization expense associated with intangible assets was $3.5 million for the three months ended September 30, 2020 and $10.8 million for the nine months ended September 30, 2020, compared to $4.2 million for the three months ended September 30, 2019 and $13.0 million for the nine months ended September 30, 2019. Estimated amortization expense for future years is as follows: (dollars in thousands) 2020 remaining $ 3,244 2021 11,336 2022 9,014 2023 7,053 2024 5,645 Thereafter 12,966 Total $ 49,258

Loan Servicing Rights

Loan Servicing Rights	9 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Loan Servicing Rights	LOAN SERVICING RIGHTS Loan servicing rights are included in other assets on the balance sheet. At September 30, 2020, loan servicing rights derived from mortgage loans sold with servicing retained totaled $25.5 million, compared to $25.4 million at December 31, 2019. Loans serviced for others are not reported as assets. The principal balance of mortgage loans serviced for others was $3.619 billion at September 30, 2020, compared to $3.445 billion at December 31, 2019. Custodial escrow balances maintained in connection with serviced loans were $45.2 million at September 30, 2020 and $12.7 million at December 31, 2019. The following table summarizes the carrying values and activity related to loan servicing rights and the related valuation allowance: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 26,288 $ 24,364 $ 25,399 $ 24,512 Additions 4,446 2,097 9,849 4,026 Amortization (2,885) (1,717) (7,399) (3,794) Balance before valuation allowance at end of period 27,849 24,744 27,849 24,744 Valuation allowance: Balance at beginning of period (2,253) (32) (31) (15) (Additions)/recoveries (95) (89) (2,317) (106) Balance at end of period (2,348) (121) (2,348) (121) Loan servicing rights, net $ 25,501 $ 24,623 $ 25,501 $ 24,623 At September 30, 2020, the fair value of servicing rights was $25.6 million, which was determined using a discount rate of 9% and a conditional prepayment rate of 15%. At December 31, 2019, the fair value of servicing rights was $26.5 million, which was determined using a discount rate of 12% and a conditional prepayment rate of 10%.

Qualified Affordable Housing Pr

Qualified Affordable Housing Projects and Other Tax Credit Investments	9 Months Ended
	Sep. 30, 2020
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, 2020, 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, 2020 December 31, 2019 Investment Accounting Method Investment Unfunded Commitment (1) Investment Unfunded Commitment LIHTC Proportional amortization $ 34,434 $ 8,028 $ 29,735 $ 3,911 FHTC Equity 26,083 22,633 22,403 17,886 Renewable Energy Equity 5,345 2,086 7,523 4,129 Total $ 65,862 $ 32,747 $ 59,661 $ 25,926 (1) All commitments will be paid by Old National by 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 Three Months Ended September 30, 2020 LIHTC $ 776 $ (1,015) FHTC 816 (1,479) Renewable Energy 2,299 (2,262) Total $ 3,891 $ (4,756) Three Months Ended September 30, 2019 LIHTC $ 793 $ (992) FHTC 1,113 (1,244) CReED 13 — Renewable Energy 85 (70) Total $ 2,004 $ (2,306) Nine Months Ended September 30, 2020 LIHTC $ 2,329 $ (3,053) FHTC 5,959 (4,191) Renewable Energy 2,958 (2,970) Total $ 11,246 $ (10,214) Nine Months Ended September 30, 2019 LIHTC $ 2,376 $ (3,076) FHTC 1,113 (1,244) CReED 13 — Renewable Energy 913 (847) Total $ 4,415 $ (5,167) (1) The amortization expense for the LIHTC investments is included in our income tax expense. The amortization expense for the FHTC, CReED, 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, CReED, and Renewable Energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) of the investments’ income (loss).

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2020
Transfers and Servicing [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, At December 31, At or for the Nine Months Ended September 30, (dollars in thousands) Outstanding at period end $ 399,141 $ 327,782 $ 337,551 Average amount outstanding during the period 355,039 N/A 344,294 Maximum amount outstanding at any month-end during the period 399,141 N/A 367,884 Weighted-average interest rate: During the period 0.27 % N/A 0.80 % At period end 0.12 % 0.53 % 0.74 % The following table presents the contractual maturity of our secured borrowings and class of collateral pledged: At September 30, 2020 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 $ 399,141 $ — $ — $ — $ 399,141 Total $ 399,141 $ — $ — $ — $ 399,141 The fair value of securities pledged to secure repurchase agreements may decline. Old National has pledged securities valued at 106% of the gross outstanding balance of repurchase agreements at September 30, 2020 to manage this risk.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2020
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 0.13% to 4.96% and variable rates 0.11% to 0.13%) maturing October 2020 to August 2035 $ 2,075,660 $ 1,800,664 ASC 815 fair value hedge and other basis adjustments 11,988 22,183 Total $ 2,087,648 $ 1,822,847 FHLB advances had weighted-average rates of 1.50% at September 30, 2020 and 2.19% at December 31, 2019. Investment securities and residential real estate loans collateralize these borrowings up to 140% of outstanding debt. In the third quarter of 2020, Old National modified $300.0 million pertaining to two FHLB advances, which lowered their weighted average effective rates from 1.78% to 0.90%. Contractual maturities of FHLB advances at September 30, 2020 were as follows: (dollars in thousands) Due in 2020 $ 150,000 Due in 2021 20,000 Due in 2022 30,500 Due in 2023 160 Due in 2024 125,000 Thereafter 1,750,000 ASC 815 fair value hedge and other basis adjustments 11,988 Total $ 2,087,648

Other Borrowings

Other Borrowings	9 Months Ended
	Sep. 30, 2020
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 (598) (715) Junior subordinated debentures (variable rates of 1.77% to 2.00%) maturing March 2035 to June 2037 42,000 52,310 Other basis adjustments (3,231) (2,833) Old National Bank: Finance lease liabilities 12,062 7,406 Subordinated debentures (fixed rate 5.75%) 12,000 12,000 Other 450 517 Total other borrowings $ 237,683 $ 243,685 Contractual maturities of other borrowings at September 30, 2020 were as follows: (dollars in thousands) Due in 2020 $ 250 Due in 2021 1,025 Due in 2022 1,073 Due in 2023 1,132 Due in 2024 176,170 Thereafter 61,412 Unamortized debt issuance costs and other basis adjustments (3,379) Total $ 237,683 Senior Notes In August 2014, Old National issued $175.0 million of senior unsecured notes with a 4.125% interest rate. These notes pay interest on February 15 and August 15. The notes mature on August 15, 2024. Junior Subordinated Debentures Junior subordinated debentures related to trust preferred securities are classified in “other borrowings.” On November 1, 2017, Old National acquired Anchor (MN) and exceeded $15 billion in assets. As a result, these securities can only be treated as Tier 2 capital for regulatory purposes, subject to certain limitations. Prior to the fourth quarter of 2017, these securities qualified as Tier 1 capital for regulatory purposes. Through various 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. In February 2020, Old National redeemed at par $4.1 million of junior subordinated debentures issued in October 2002 by Anchor (MN) (as successor to VFSC, Inc.), which was acquired by Old National in 2017. This subsequently caused the redemption of all of the common and capital (preferred) securities issued by VFSC Capital Trust II by the same amount in aggregate. At the time of redemption, the rate on this floating rate instrument was 5.36%. In March 2020, Old National redeemed at par $3.1 million of junior subordinated debentures issued in April 2004 by Anchor (MN) (as successor to VFSC, Inc.), which was acquired by Old National in 2017. This subsequently caused the redemption of all of the common and capital (preferred) securities issued by VFSC Capital Trust III by the same amount in aggregate. At the time of redemption, the rate on this floating rate instrument was 4.71%. In April 2020, Old National redeemed at par $3.1 million of junior subordinated debentures issued in April 2002 by Anchor (MN) (as successor to VFSC, Inc.), which was acquired by Old National in 2017. This subsequently caused the redemption of all of the common and capital (preferred) securities issued by VFSC Capital Trust I by the same amount in aggregate. At the time of redemption, the rate on this floating rate instrument was 5.62%. The following table summarizes the terms of our outstanding junior subordinated debentures: (dollars in thousands) Rate at September 30, Name of Trust Issuance Date Issuance Rate Maturity Date St. Joseph Capital Trust II March 2005 $ 5,000 3-month LIBOR plus 1.75% 2.00% March 17, 2035 Anchor Capital Trust III August 2005 5,000 3-month LIBOR plus 1.55% 1.77% September 30, 2035 Home Federal Statutory September 2006 15,000 3-month LIBOR plus 1.65% 1.90% September 15, 2036 Monroe Bancorp Capital July 2006 3,000 3-month LIBOR plus 1.60% 1.88% October 7, 2036 Tower Capital Trust 3 December 2006 9,000 3-month LIBOR plus 1.69% 1.93% March 1, 2037 Monroe Bancorp Statutory March 2007 5,000 3-month LIBOR plus 1.60% 1.85% June 15, 2037 Total $ 42,000 Subordinated Debentures On November 1, 2017, Old National assumed $12.0 million of subordinated fixed-to-floating notes related to the acquisition of Anchor (MN). The subordinated debentures have a 5.75% fixed rate of interest through October 29, 2020. From October 30, 2020 to the October 30, 2025 maturity date, the debentures have a floating rate of interest equal to the three-month LIBOR rate plus 4.356%. Finance Lease Liabilities Old National has long-term finance lease liabilities for certain banking centers totaling $12.1 million. The economic substance of these leases is that Old National is financing the acquisition of the building through the lease and accordingly, the building is recorded as a right-of-use asset in premises and equipment and the lease is recorded as a liability in other borrowings. The right-of-use assets and lease liabilities are initially measured at the present value of the lease payments over the lease term using Old National’s incremental borrowing rate based on the information available at the commencement date of the lease. See Note 9 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, 2020
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, 2020 Balance at beginning of period $ 144,811 $ — $ 4,355 $ (123) $ 149,043 Other comprehensive income (loss) before 5,234 — (8) — 5,226 Amounts reclassified from AOCI to income (1) (3,837) — (1,169) 21 (4,985) Balance at end of period $ 146,208 $ — $ 3,178 $ (102) $ 149,284 Three Months Ended September 30, 2019 Balance at beginning of period $ 48,701 $ (7,729) $ 1,220 $ (155) $ 42,037 Other comprehensive income (loss) before 15,876 — (58) — 15,818 Amounts reclassified from AOCI to income (1) (335) 992 (13) 15 659 Balance at end of period $ 64,242 $ (6,737) $ 1,149 $ (140) $ 58,514 Nine Months Ended September 30, 2020 Balance at beginning of period $ 56,131 $ — $ 240 $ (164) $ 56,207 Other comprehensive income (loss) before 98,336 — 5,692 — 104,028 Amounts reclassified from AOCI to income (1) (8,259) — (2,754) 62 (10,951) Balance at end of period $ 146,208 $ — $ 3,178 $ (102) $ 149,284 Nine Months Ended September 30, 2019 Balance at beginning of period $ (37,348) $ (8,515) $ 1,099 $ (186) $ (44,950) Other comprehensive income (loss) before 102,737 — 357 — 103,094 Amounts reclassified from AOCI to income (1) (1,147) 1,778 (307) 46 370 Balance at end of period $ 64,242 $ (6,737) $ 1,149 $ (140) $ 58,514 (1) See tables below for details about reclassifications to income. The following table summarizes the significant amounts reclassified out of each component of AOCI for the three months ended September 30, 2020 and 2019: Details about AOCI Components Amount Reclassified Affected Line Item in the Three Months Ended (dollars in thousands) 2020 2019 Unrealized gains and losses on $ 4,921 $ 424 Debt securities gains (losses), net (1,084) (89) Income tax (expense) benefit $ 3,837 $ 335 Net income Unrealized gains and losses on $ — $ (1,384) Interest income (expense) — 392 Income tax (expense) benefit $ — $ (992) Net income Gains and losses on cash flow hedges $ 1,550 $ 21 Interest income (expense) (381) (8) Income tax (expense) benefit $ 1,169 $ 13 Net income Amortization of defined benefit Actuarial gains (losses) $ (28) $ (20) Salaries and employee benefits 7 5 Income tax (expense) benefit $ (21) $ (15) Net income Total reclassifications for the period $ 4,985 $ (659) Net income The following table summarizes the significant amounts reclassified out of each component of AOCI for the nine months ended September 30, 2020 and 2019: Details about AOCI Components Amount Reclassified Affected Line Item in the Nine Months Ended (dollars in thousands) 2020 2019 Unrealized gains and losses on $ 10,606 $ 1,486 Debt securities gains (losses), net (2,347) (339) Income tax (expense) benefit $ 8,259 $ 1,147 Net income Unrealized gains and losses on $ — $ (2,405) Interest income (expense) — 627 Income tax (expense) benefit $ — $ (1,778) Net income Gains and losses on cash flow hedges $ 3,651 $ 412 Interest income (expense) (897) (105) Income tax (expense) benefit $ 2,754 $ 307 Net income Amortization of defined benefit Actuarial gains (losses) $ (82) $ (61) Salaries and employee benefits 20 15 Income tax (expense) benefit $ (62) $ (46) Net income Total reclassifications for the period $ 10,951 $ (370) Net income

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION At September 30, 2020, Old National had 2.9 million shares remaining available for issuance under the Company’s Amended and Restated 2008 Incentive Compensation Plan. The granting of awards to key employees is typically in the form of restricted stock awards or units. Restricted Stock Awards Old National granted 360 thousand time-based restricted stock awards to certain key officers during the nine months ended September 30, 2020, with shares vesting generally over a 36 month period. Compensation expense is recognized on a straight-line basis over the vesting period. Shares are subject to certain restrictions and risk of forfeiture by the participants. At September 30, 2020, unrecognized compensation expense was estimated to be $6.6 million for unvested restricted stock awards. The cost is expected to be recognized over a weighted-average period of 2.3 years. Old National recorded share-based compensation expense, net of tax, related to restricted stock awards of $0.7 million during the three months ended September 30, 2020 and $1.9 million during the nine months ended September 30, 2020, compared to $0.7 million during the three months ended September 30, 2019 and $1.9 million during the nine months ended September 30, 2019. Restricted Stock Units Old National granted 210 thousand shares of performance based restricted stock units to certain key officers during the nine months ended September 30, 2020, with shares vesting at the end of a 36 month period based on the achievement of certain targets. For certain awards, the level of performance could increase or decrease the number of shares earned. Compensation expense is recognized on a straight-line basis over the vesting period. Shares are subject to certain restrictions and risk of forfeiture by the participants. At September 30, 2020, unrecognized compensation expense was estimated to be $4.4 million. The cost is expected to be recognized over a weighted-average period of 1.9 years. Old National recorded share-based compensation expense, net of tax, related to restricted stock units of $0.6 million during the three months ended September 30, 2020 and $2.6 million during the nine months ended September 30, 2020, compared to $1.0 million during the three months ended September 30, 2019 and $2.6 million during the nine months ended September 30, 2019. Stock Options and Appreciation Rights Old National has not granted stock options since 2009. However, Old National did acquire stock options and stock appreciation rights through prior year acquisitions. Old National recorded no incremental expense associated with the conversion of these options and stock appreciation rights. At September 30, 2020, 49 thousand stock appreciation rights remained outstanding.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
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) 2020 2019 2020 2019 Provision at statutory rate of 21% $ 18,920 $ 17,437 $ 37,200 $ 48,245 Tax-exempt income: Tax-exempt interest (2,682) (2,511) (7,985) (7,645) Section 291/265 interest disallowance 36 113 153 346 Company-owned life insurance income (386) (568) (1,657) (1,806) Tax-exempt income (3,032) (2,966) (9,489) (9,105) State income taxes 656 1,496 2,367 5,053 Interim period effective rate adjustment (2,501) (1,598) 840 (557) Tax credit investments - federal (2,575) (2,443) (6,296) (3,577) Other, net 686 1,328 232 658 Income tax expense $ 12,154 $ 13,254 $ 24,854 $ 40,717 Effective tax rate 13.5 % 16.0 % 14.0 % 17.7 % In accordance with ASC 740-270, Accounting for Interim Reporting , the provision for income taxes was recorded at September 30, 2020 and 2019 based on the current estimate of the effective annual rate. The lower effective tax rate during the three and nine months ended September 30, 2020 when compared to the three and nine months ended September 30, 2019 is primarily the result of an increase in federal tax credits available. Unrecognized Tax Benefits Old National has an immaterial amount of unrecognized tax benefits. Old National is currently under audit by the Internal Revenue Service. Old National expects the total amount of unrecognized tax benefits to be reduced to zero after the audit is finalized. Net Deferred Tax Assets Net deferred tax assets are included in other assets on the balance sheet. Significant components of net deferred tax assets (liabilities) were as follows: (dollars in thousands) September 30, December 31, Deferred Tax Assets Allowance for loan losses, net of recapture $ 34,677 $ 14,179 Benefit plan accruals 15,636 19,673 Alternative minimum tax credit — 1,272 Net operating loss carryforwards 18,982 25,336 Deferred gain on securities 2,272 3,754 Acquired loans 12,542 16,784 Operating lease liabilities 24,512 26,503 Tax credit investments and other partnerships 1,264 1,765 Other real estate owned 27 141 Other, net 580 591 Total deferred tax assets 110,492 109,998 Deferred Tax Liabilities Purchase accounting (18,038) (17,564) Loan servicing rights (6,213) (6,289) Premises and equipment (14,267) (12,167) Prepaid expenses (956) (973) Operating lease right-of-use assets (21,718) (25,448) Unrealized gains on available-for-sale investment securities (41,349) (15,751) Unrealized gains on hedges (1,035) (78) Other, net (2,767) (2,023) Total deferred tax liabilities (106,343) (80,293) Net deferred tax assets $ 4,149 $ 29,705 Through the acquisition of Anchor (WI) in the second quarter of 2016 and Lafayette Savings Bank in the fourth quarter of 2014, both former thrifts, Old National Bank’s retained earnings at September 30, 2020 include base-year bad debt reserves, created for tax purposes prior to 1988, totaling $52.8 million. Of this total, $50.9 million was acquired from Anchor (WI), and $1.9 million was acquired from Lafayette Savings Bank. Base-year reserves are subject to recapture in the unlikely event that Old National Bank (1) makes distributions in excess of current and accumulated earnings and profits, as calculated for federal income tax purposes, (2) redeems its stock, or (3) liquidates. Old National Bank has no intention of making such a nondividend distribution. Accordingly, under current accounting principles, a related deferred income tax liability of $13.0 million has not been recognized. No valuation allowance was recorded at September 30, 2020 or December 31, 2019 because, based on current expectations, Old National believes it will generate sufficient income in future years to realize deferred tax assets. Old National has federal net operating loss carryforwards totaling $52.4 million at September 30, 2020 and $78.5 million at December 31, 2019. This federal net operating loss was acquired from the acquisition of Anchor (WI) in 2016. If not used, the federal net operating loss carryforwards will expire from 2029 to 2033. Old National has recorded state net operating loss carryforwards totaling $132.2 million at September 30, 2020 and $148.4 million at December 31, 2019. If not used, the state net operating loss carryforwards will expire from 2024 to 2033. 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 recorded net operating loss carryforwards will be used prior to expiration.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTSAs 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. The notional amounts of these derivative instruments were $1.106 billion at September 30, 2020 and $665.5 million at December 31, 2019. These derivative financial instruments at September 30, 2020 consisted of $380.5 million notional amount of receive-fixed, pay-variable interest rate swaps on certain of its borrowings, $325.0 million notional amount of pay-fixed, receive-variable interest rate swaps on certain of its borrowings, and $400.0 million notional amount interest rate collars and floors related to variable-rate commercial loan pools. Derivative financial instruments at December 31, 2019 consisted of $130.5 million notional amount of receive-fixed, pay-variable interest rate swaps on certain of its borrowings, $25.0 million notional amount of pay-fixed, receive-variable interest rate swaps on certain of its borrowings, and $510.0 million notional amount interest rate collars and floors related to variable-rate commercial loan pools. These hedges were entered into to manage interest rate risk. Derivative instruments are recognized on the balance sheet at their fair value and are not reported on a net basis. In accordance with ASC 815-20-35-1, subsequent changes in fair value for a hedging instrument that has been designated and qualifies as part of a hedging relationship should be accounted for in the following manner: Cash flow hedges : changes in fair value are recognized as a component in other comprehensive income. Fair value hedges : changes in fair value are recognized concurrently in earnings. Consistent with this guidance, 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. While separate measurement and presentation of ineffectiveness is eliminated, paragraph 815-20-45-1A requires the change in fair value of the hedging instrument that is included in the assessment of hedge effectiveness be presented in the same income statement line item that is used to present the earnings effect of the hedged item. 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, 2020, the notional amounts of the interest rate lock commitments were $233.3 million and forward commitments were $291.6 million. At December 31, 2019, the notional amounts of the interest rate lock commitments were $65.7 million and forward commitments were $101.6 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 customers. The notional amounts of these customer derivative instruments and the offsetting counterparty derivative instruments were $1.792 billion at September 30, 2020. The notional amounts of these customer derivative instruments and the offsetting counterparty derivative instruments were $1.298 billion at December 31, 2019. 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 customers 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 customers. Old National does not designate these foreign currency forward contracts for hedge accounting treatment. The notional amounts of these foreign currency forward contracts and the offsetting counterparty derivative instruments were $9.3 million at September 30, 2020 and $8.2 million at December 31, 2019. Credit risk arises from the possible inability of counterparties to meet the terms of their contracts. Old National’s exposure is limited to the replacement 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. 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 $7.1 million will be reclassified to interest income and $1.7 million will be reclassified to interest expense. The following table summarizes the fair value of derivative financial instruments utilized by Old National: (dollars in thousands) Balance Fair Balance Fair September 30, 2020 Derivatives designated as hedging instruments Interest rate contracts Other assets $ 18,758 Other liabilities $ 2,367 Total derivatives designated as hedging instruments $ 18,758 $ 2,367 Derivatives not designated as hedging instruments Interest rate contracts (1) Other assets $ 124,712 Other liabilities $ 16,282 Mortgage contracts Other assets 10,592 Other liabilities — Foreign currency contracts Other assets 256 Other liabilities 127 Total derivatives not designated as hedging instruments $ 135,560 $ 16,409 Total $ 154,318 $ 18,776 December 31, 2019 Derivatives designated as hedging instruments Interest rate contracts Other assets $ 7,157 Other liabilities $ 1,046 Total derivatives designated as hedging instruments $ 7,157 $ 1,046 Derivatives not designated as hedging instruments Interest rate contracts (1) Other assets $ 42,224 Other liabilities $ 10,883 Mortgage contracts Other assets 1,702 Other liabilities 354 Foreign currency contracts Other assets 218 Other liabilities 110 Total derivatives not designated as hedging instruments $ 44,144 $ 11,347 Total $ 51,301 $ 12,393 (1) The fair values of counterparty interest rate swaps are zero due to the settlement of centrally-cleared variation margin rules. The net adjustment was $109.2 million as of September 30, 2020 and $31.6 million as of December 31, 2019. Summary information about the interest rate swaps designated as fair value hedges is as follows: (dollars in thousands) September 30, December 31, Notional amounts $ 380,500 $ 130,500 Weighted average pay rates 0.20 % 1.82 % Weighted average receive rates 1.33 % 2.20 % Weighted average maturity (in years) 2.4 2.8 Fair value of swaps $ 10,233 $ 1,555 The effect of derivative instruments in fair value hedging relationships on the consolidated statements of income were as follows: (dollars in thousands) Location of Gain or Gain (Loss) Recognized in Income on Derivative Hedged Items Location of Gain or Gain (Loss) Recognized in Income on Related Hedged Items Derivatives in Three Months Ended Interest rate contracts Interest income/(expense) $ (1,294) Fixed-rate debt Interest income/(expense) $ 1,290 Three Months Ended Interest rate contracts Interest income/(expense) $ 12 Fixed-rate debt Interest income/(expense) $ (14) Nine Months Ended Interest rate contracts Interest income/(expense) $ 8,678 Fixed-rate debt Interest income/(expense) $ (8,726) Nine Months Ended Interest rate contracts Interest income/(expense) $ 12,925 Fixed-rate debt Interest income/(expense) $ (12,914) Summary information about the interest rate swaps designated as cash flow hedges is as follows: (dollars in thousands) September 30, December 31, Notional amounts $ 325,000 $ 25,000 Weighted average pay rates 0.74 % 3.52 % Weighted average receive rates 0.34 % 1.93 % Weighted average maturity (in years) 3.8 2.1 Unrealized gains (losses) $ (2,222) $ (954) 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. Summary information about the collars designated as cash flow hedges is as follows: (dollars in thousands) September 30, December 31, Notional amounts $ 300,000 $ 300,000 Weighted average cap rates 3.21 % 3.21 % Weighted average floor rates 2.21 % 2.21 % Weighted average rates 0.16 % 1.70 % Weighted average maturity (in years) 1.1 1.9 Unrealized gains (losses) $ 6,790 $ 3,691 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. Summary information about the interest rate floor transactions designated as cash flow hedges is as follows: (dollars in thousands) September 30, Notional amounts $ 100,000 Weighted average floor strike rate 0.75 % Weighted average rates 0.16 % Weighted average maturity (in years) 2.5 Unrealized gains (losses) $ 1,590 The structure of Old National's interest rate floor spread transactions at December 31, 2019 was such that Old National received an incremental amount if the index fell below the purchased floor strike rate. Old National paid an incremental amount if the index fell below the sold floor rate. Floor corridor protection was limited to the spread between the purchased floor strike rate and the sold floor rate. No payments were required if the index remained above the purchased floor strike rate. Old National terminated these interest rate floor spread transactions during the first quarter of 2020. Summary information about the floor spread transactions designated as cash flow hedges at December 31, 2019 was as follows: (dollars in thousands) December 31, Notional amounts $ 210,000 Weighted average purchased floor strike rate 2.00 % Weighted average sold floor rate 1.00 % Weighted average rate 1.70 % Weighted average maturity (in years) 2.1 Unrealized gains (losses) $ 1,820 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) 2020 2019 2020 2019 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ (11) $ (73) $ 1,550 $ 21 Nine Months Ended Nine Months Ended 2020 2019 2020 2019 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ 7,546 $ 479 $ 3,651 $ 412 The effect of derivatives not designated as hedging instruments on the consolidated statements of income were as follows: Three Months Ended (dollars in thousands) 2020 2019 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 5 $ (116) Mortgage contracts Mortgage banking revenue (2,811) 1,110 Foreign currency contracts Other income/(expense) 49 — Total $ (2,757) $ 994 Nine Months Ended 2020 2019 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ (582) $ (247) Mortgage contracts Mortgage banking revenue 9,244 2,951 Foreign currency contracts Other income/(expense) 25 (11) Total $ 8,687 $ 2,693 (1) Includes the valuation differences between the customer and offsetting swaps.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES COVID-19 As previously disclosed, a novel strain of coronavirus, COVID-19, was reported in Wuhan, China and continues to unfold across the U.S. The spread of the COVID-19 virus had an impact on our operations as of September 30, 2020, but it is too early to know by how much the impact will have on the Company's business, financial condition, and results of operations of the Company and its customers. Changes in the behavior of customers, businesses, and their employees as a result of the COVID-19 pandemic, including social distancing practices, additional actions taken by federal, state, and local governments to contain COVID-19 or treat its impact are also unknown. However, if these actions are sustained, it may adversely impact several industries within our geographic footprint and impair the ability of Old National's customers to fulfill their contractual obligations to the Company. This could cause Old National to experience a material adverse effect on our business operations, asset valuations, financial condition, and results of operations. Material adverse impacts may include all or a combination of valuation impairments on Old National's intangible assets, investments, loans, loan servicing rights, deferred tax assets, or counter-party risk derivatives. Litigation In the normal course of business, Old National Bancorp and its subsidiaries have been named, from time to time, as defendants in various legal actions. Certain of the actual or threatened legal actions may include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages. Old National contests liability and/or the amount of damages as appropriate in each pending matter. In view of the inherent difficulty of predicting the outcome of such matters, particularly in cases where claimants seek substantial or indeterminate damages or where investigations and proceedings are in the early stages, Old National cannot predict with certainty the loss or range of loss, if any, related to such matters, how or if such matters will be resolved, when they will ultimately be resolved, or what the eventual settlement, or other relief, if any, might be. Subject to the foregoing, Old National believes, based on current knowledge and after consultation with counsel, that the outcome of such pending matters will not have a material adverse effect on the consolidated financial condition of Old National, although the outcome of such matters could be material to Old National’s operating results and cash flows for a particular future period, depending on, among other things, the level of Old National’s revenues or income for such period. Old National will accrue for a loss contingency if (1) it is probable that a future event will occur and confirm the loss and (2) the amount of the loss can be reasonably estimated. Old National is not currently involved in any material litigation. Credit-Related Financial Instruments In the normal course of business, Old National’s banking affiliates have entered into various agreements to extend credit, including loan commitments of $3.511 billion and standby letters of credit of $88.5 million at September 30, 2020. At September 30, 2020, approximately $3.238 billion of the loan commitments had fixed rates and $272.1 million had floating rates, with the floating interest rates ranging from 0% to 13%. At December 31, 2019, loan commitments totaled $2.779 billion and standby letters of credit totaled $87.8 million. These commitments are not reflected in the consolidated financial statements. The allowance for unfunded loan commitments totaled $11.0 million at September 30, 2020 and $2.7 million at December 31, 2019. The increase in allowance for unfunded loan commitments included a cumulative-effect adjustment of $4.5 million effective January 1, 2020 due to the adoption of ASC 326. See Note 2 for additional information about CECL for unfunded loan commitments. Old National had credit extensions with various unaffiliated banks related to letter of credit commitments issued on behalf of Old National’s clients totaling $8.1 million at September 30, 2020 and $8.7 million at December 31, 2019. Old National provided collateral to the unaffiliated banks to secure credit extensions totaling $7.5 million at September 30, 2020 and $7.7 million at December 31, 2019. Old National did not provide collateral for the remaining credit extensions. 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, 2020, the conversion ratio was 1.6228. 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, 2020 are carried at a zero cost basis and are included in other assets with our equity securities that have no readily determinable fair value.

Financial Guarantees

Financial Guarantees	9 Months Ended
	Sep. 30, 2020
Guarantees and Product Warranties [Abstract]
Financial Guarantees	FINANCIAL GUARANTEES Old National holds instruments, in the normal course of business with clients, that are considered financial guarantees in accordance with FASB ASC 460-10 (FIN 45, Guarantor’s Accounting and Disclosure Requirements for Guarantees, Including Indirect Guarantees of Indebtedness of Others ) , which requires Old National to record the instruments 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. At September 30, 2020, the notional amount of standby letters of credit was $88.5 million, which represented the maximum amount of future funding requirements, and the carrying value was $0.4 million. At December 31, 2019, the notional amount of standby letters of credit was $87.8 million, which represented the maximum amount of future funding requirements, and the carrying value was $0.6 million. Old National is a party in risk participation transactions of interest rate swaps, which had total notional amount of $47.6 million at September 30, 2020.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATIONOperating segments are components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance.  Old National Bank, Old National’s bank subsidiary, is the only significant subsidiary upon which management makes decisions regarding how to allocate resources and assess performance.  Each of the branches of Old National Bank provide a group of similar community banking services, including such products and services as commercial, real estate and consumer loans, time deposits, checking and savings accounts, cash management, brokerage, trust, and investment advisory services.  The individual bank branches located throughout our Midwest footprint have similar operating and economic characteristics.  While the chief decision maker monitors the revenue streams of the various products, services, and regional locations, operations are managed and financial performance is evaluated on a Company-wide basis.  Accordingly, all of the community banking services and branch locations are considered by management to be aggregated into one reportable operating segment, community banking.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2020
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 : The fair values for investment 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 LIBOR 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. Residential 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 derivative valuation models using market data 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, 2020 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 2,518 $ 2,518 $ — $ — Investment securities available-for-sale: U.S. Treasury 10,230 10,230 — — U.S. government-sponsored entities and agencies 491,541 — 491,541 — Mortgage-backed securities - Agency 3,382,280 — 3,382,280 — States and political subdivisions 1,426,495 — 1,426,495 — Pooled trust preferred securities 7,527 — — 7,527 Other securities 283,461 — 283,461 — Residential loans held for sale 85,091 — 85,091 — Derivative assets 154,318 — 154,318 — Financial Liabilities Derivative liabilities 18,776 — 18,776 — Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 6,842 $ 6,842 $ — $ — Investment securities available-for-sale: U.S. Treasury 17,682 17,682 — — U.S. government-sponsored entities and agencies 592,984 — 592,984 — Mortgage-backed securities - Agency 3,183,861 — 3,183,861 — States and political subdivisions 1,275,643 — 1,275,603 40 Pooled trust preferred securities 8,222 — — 8,222 Other securities 306,699 31,169 275,530 — Residential loans held for sale 46,898 — 46,898 — Derivative assets 51,301 — 51,301 — Financial Liabilities Derivative liabilities 12,393 — 12,393 — The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3): (dollars in thousands) Pooled Trust States and Three Months Ended September 30, 2020 Balance at beginning of period $ 7,185 $ — Accretion of discount 4 — Sales/payments received (16) — Increase in fair value of securities 354 — Balance at end of period $ 7,527 $ — Three Months Ended September 30, 2019 Balance at beginning of period $ 7,836 $ 40 Accretion of discount 3 — Sales/payments received (14) — Decrease in fair value of securities (130) — Balance at end of period $ 7,695 $ 40 Nine Months Ended September 30, 2020 Balance at beginning of period $ 8,222 $ 40 Accretion of discount 11 — Sales/payments received (49) (40) Decrease in fair value of securities (657) — Balance at end of period $ 7,527 $ — Nine Months Ended September 30, 2019 Balance at beginning of period $ 8,495 $ 4,108 Accretion of discount 9 — Sales/payments received (46) (35) Decrease in fair value of securities (763) — Transfers out of Level 3 — (4,033) Balance at end of period $ 7,695 $ 40 The accretion of discounts on securities in the table above is included in interest income. The decrease in the fair value of securities in the table above is included in the unrealized holding gains (losses) for the period in the statement of other comprehensive income. A decrease in fair value is reflected in the balance sheet as a decrease in the fair value of investment securities available-for-sale, a decrease in accumulated other comprehensive income, which is included in shareholders’ equity, and an increase in other assets related to the tax impact. The increase in the fair value of securities in the table above is included in the unrealized holding gains (losses) for the period in the statement of other comprehensive income. An increase in fair value is reflected in the balance sheet as an increase in the fair value of investment securities available-for-sale, an increase in accumulated other comprehensive income, which is included in shareholders’ equity, and a decrease in other assets related to the tax impact. During the nine months ended September 30, 2019, Old National received third party pricing on a $4.0 million state and political subdivisions security and transferred it out of Level 3. 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) (4) September 30, 2020 Pooled trust preferred securities $ 7,527 Discounted cash flow Constant prepayment rate (1) 0.00% Additional asset defaults (2) 5.9% - 8.8% (6.8%) Expected asset recoveries (3) 0.0% - 18.8% (5.9%) December 31, 2019 Pooled trust preferred securities $ 8,222 Discounted cash flow Constant prepayment rate (1) 0.00% Additional asset defaults (2) 6.2% - 8.0% (6.8%) Expected asset recoveries (3) 0.0% - 19.1% (6.0%) State and political subdivisions 40 Discounted cash flow No observable inputs N/A Local municipality issuance Old National owns 100% Carried at par (1) Assuming no prepayments. (2) Each currently performing pool asset is assigned a default probability based on the banking environment, which is adjusted for specific issuer evaluation, of 0%, 50%, or 100%. (3) Each currently defaulted pool asset is assigned a recovery probability based on specific issuer evaluation of 0%, 25%, or 100%. (4) Unobservable inputs are weighted by the estimated number of defaults and current performing collateral of the instruments. Significant changes in any of the unobservable inputs used in the fair value measurement in isolation would have resulted in a significant change to the fair value measurement. The pooled trust preferred securities Old National owns are subordinate note classes that rely on an ongoing cash flow stream to support their values. The senior note classes receive the benefit of prepayments to the detriment of subordinate note classes since the ongoing interest cash flow stream is reduced by the early redemption. Generally, a change in prepayment rates or additional pool asset defaults would have an impact that is directionally opposite from a change in the expected recovery of a defaulted pool asset. Non-Recurring Basis Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at September 30, 2020 Using (dollars in thousands) Carrying Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 9,790 $ — $ — $ 9,790 Commercial real estate loans 24,527 — — 24,527 Foreclosed Assets: Residential 106 — — 106 Loan servicing rights 25,597 — 25,597 — 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 $39.0 million, with a valuation allowance of $4.7 million at September 30, 2020. Old National recorded provision recoveries associated with these loans totaling $5.0 million for the three months ended September 30, 2020 and provision expense totaling $1.5 million for the nine months ended September 30, 2020. Old National recorded provision expense associated with commercial and commercial real estate loans that were deemed collateral dependent totaling $0.3 million for the three months ended September 30, 2019 and $2.6 million for the nine months ended September 30, 2019. 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 $106 thousand at September 30, 2020. There were write-downs of other real estate owned of $63 thousand for the three months ended September 30, 2020 and $161 thousand for the nine months ended September 30, 2020. There were write-downs of other real estate owned of $18 thousand for the three months ended September 30, 2019 and $39 thousand for the nine months ended September 30, 2019. 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). The valuation allowance for loan servicing rights with impairments at September 30, 2020 totaled $2.3 million. Old National recorded impairments associated with these loan servicing rights totaling $0.1 million during the three months ended September 30, 2020 and $2.3 million during the nine months ended September 30, 2020. There were impairments of $0.1 million for the three months ended September 30, 2019 and the nine months ended September 30, 2019. Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 10,361 $ — $ — $ 10,361 Commercial real estate loans 11,610 — — 11,610 Foreclosed Assets: Commercial real estate 21 — — 21 Residential 22 — — 22 Loan servicing rights 4,662 — 4,662 — At December 31, 2019, commercial and commercial real estate loans that are deemed collateral dependent had a principal amount of $30.9 million, with a valuation allowance of $8.9 million. Other real estate owned and other repossessed property had a net carrying amount of $43 thousand at December 31, 2019. The valuation allowance for loan servicing rights with impairments at December 31, 2019 totaled $31 thousand. 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) (3) September 30, 2020 Collateral Dependent Loans Commercial loans $ 9,790 Discounted Discount for type of property, 2% - 22% (11%) cash flow age of appraisal, and current status Commercial real estate loans 24,527 Discounted Discount for type of property, 0% - 18% (9%) cash flow age of appraisal, and current status Foreclosed Assets Residential (1) 106 Fair value of Discount for type of property, 37% collateral age of appraisal, and current status December 31, 2019 Collateral Dependent Loans Commercial loans $ 10,361 Fair value of Discount for type of property, 0% - 50% (13%) collateral age of appraisal, and current status Commercial real estate loans (2) 11,610 Fair value of Discount for type of property, 45% collateral age of appraisal, and current status Foreclosed Assets Commercial real estate (2) 21 Fair value of Discount for type of property, 43% collateral age of appraisal, and current status Residential (2) 22 Fair value of Discount for type of property, 21% collateral age of appraisal, and current status (1) There was only one foreclosed residential asset at September 30, 2020, so no range or weighted average is reported. (2) There was only one collateral dependent commercial real estate loan, one foreclosed commercial real estate asset, and one foreclosed residential asset at December 31, 2019, so no range or weighted average is reported. (3) 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. Residential Loans Held For Sale Old National has elected the fair value option for residential 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. Included in the income statement is interest income for loans held for sale totaling $0.6 million for the three months ended September 30, 2020 and $1.5 million for the nine months ended September 30, 2020, compared to $0.4 million for the three months ended September 30, 2019 and $0.9 million for the nine months ended September 30, 2019. Old National has elected the fair value option for newly originated conforming fixed-rate and adjustable-rate first mortgage loans held for sale. These 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, 2020 Residential loans held for sale $ 85,091 $ 5,203 $ 79,888 December 31, 2019 Residential loans held for sale $ 46,898 $ 1,529 $ 45,369 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, 2020 Residential loans held for sale $ (1,360) $ 16 $ — $ (1,344) Three Months Ended September 30, 2019 Residential loans held for sale $ 137 $ 2 $ — $ 139 Nine Months Ended September 30, 2020 Residential loans held for sale $ 3,658 $ 18 $ (2) $ 3,674 Nine Months Ended September 30, 2019 Residential loans held for sale $ 1,312 $ 12 $ — $ 1,324 Financial Instruments Not Carried at Fair Value The carrying amounts and estimated fair values of financial instruments not carried at fair value were as follows: Fair Value Measurements at September 30, 2020 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 330,750 $ 330,750 $ — $ — Loans, net: Commercial 4,232,841 — — 4,193,640 Commercial real estate 5,622,578 — — 5,514,469 Residential real estate 2,251,375 — — 2,223,556 Consumer credit 1,654,327 — — 1,651,456 Accrued interest receivable 83,052 34 23,557 59,461 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 5,463,007 $ 5,463,007 $ — $ — Checking, NOW, savings, and money market 9,780,138 9,780,138 — — Other time deposits 1,206,658 — 1,227,050 — Brokered certificates of deposit 56,691 — 56,655 — Federal funds purchased and interbank borrowings 1,259 1,259 — — Securities sold under agreements to repurchase 399,141 399,141 — — FHLB advances 2,087,648 — 2,218,866 — Other borrowings 237,683 — 257,811 — Accrued interest payable 4,279 — 4,279 — Standby letters of credit 442 — — 442 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 12,811 Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 276,337 $ 276,337 $ — $ — Loans, net: Commercial 2,867,711 — — 2,831,298 Commercial real estate 5,145,204 — — 5,130,848 Residential real estate 2,331,990 — — 2,357,341 Consumer credit 1,718,000 — — 1,676,253 Accrued interest receivable 85,123 15 28,185 56,923 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 4,042,286 $ 4,042,286 $ — $ — Checking, NOW, savings, and money market 8,828,881 8,828,881 — — Other time deposits 1,589,988 — 1,600,214 — Brokered certificates of deposit 92,242 — 92,355 — Federal funds purchased and interbank borrowings 350,414 350,414 — — Securities sold under agreements to repurchase 327,782 327,782 — — FHLB advances 1,822,847 — 1,875,089 — Other borrowings 243,685 — 254,519 — Accrued interest payable 8,272 — 8,272 — Standby letters of credit 573 — — 573 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 4,302 The methods utilized to measure the fair value of financial instruments at September 30, 2020 and December 31, 2019 represent an approximation of exit price, however, an actual exit price may differ.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS Old National’s revenue from contracts with customers in the scope of Topic 606 is recognized within noninterest income. The consolidated statements of income include all categories of noninterest income. The following table reflects only the categories of noninterest income that are within the scope of Topic 606: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Wealth management fees $ 9,239 $ 9,160 $ 27,547 $ 27,604 Service charges on deposit accounts 8,698 11,860 26,357 34,201 Debit card and ATM fees 5,276 5,370 15,106 16,292 Investment product fees 5,351 5,244 16,070 16,106 Other income: Merchant processing fees 852 775 2,363 2,303 Gain (loss) on other real estate owned 260 29 238 194 Safe deposit box fees 223 267 741 936 Insurance premiums and commissions 61 194 373 569 Total $ 29,960 $ 32,899 $ 88,795 $ 98,205 Wealth management fees : Old National earns wealth management fees based upon asset custody and investment management services provided to individual and institutional customers. Most of these customers receive monthly or quarterly billings for services rendered based upon the market value of assets in custody. Fees that are transaction based are recognized at the point in time that the transaction is executed. Service charges on deposit accounts : Old National earns fees from deposit customers for transaction-based, account maintenance, and overdraft services. Transaction-based fees and overdraft fees are recognized at a point in time, since the customer generally has a right to cancel the depository arrangement at any time. The arrangement is considered a day-to-day contract with ongoing renewals and optional purchases, so the duration of the contract does not extend beyond the services already performed. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which Old National satisfies its performance obligation. Debit card and ATM fees : Debit card and ATM fees include ATM usage fees and debit card interchange income. As with the transaction-based fees on deposit accounts, the ATM fees are recognized at the point in time that Old National fulfills the customer’s request. Old National earns interchange fees from cardholder transactions processed through card association networks. Interchange rates are generally set by the card associations based upon purchase volumes and other factors. Interchange fees represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. Investment product fees : Investment product fees are the commissions and fees received from a registered broker/dealer and investment adviser that provide those services to Old National customers. Old National acts as an agent in arranging the relationship between the customer and the third-party service provider. These fees are recognized monthly from the third-party broker based upon services already performed, net of the processing fees charged to Old National by the broker.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements include the accounts of Old National Bancorp and its wholly-owned affiliates (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, 2020 and December 31, 2019, and the results of its operations for the three and nine months ended September 30, 2020 and 2019. Interim results do not necessarily represent annual results. These financial statements should be read in conjunction with Old National’s Annual Report on Form 10-K for the year ended December 31, 2019. All significant 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.
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2020 FASB ASC 326 – In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and all related subsequent amendments thereto (“CECL”). The main objective of this amendment is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments within its scope, including loans held for investment purposes and other commitments to extend credit held by a reporting entity at each reporting date. The amendment requires the measurement of all expected credit losses for the in-scope financial assets at the date of origination or acquisition, and at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to enhance their credit loss estimates. The amendment requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The current expected credit loss measurement will be used to estimate the allowance for credit losses (“ACL”) over the life of the financial assets. The amendments in this update became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. As previously disclosed, Old National formed a cross-functional committee to oversee the adoption of the ASU at the effective date. A working group was also formed to develop a project plan focused on understanding the ASU, researching issues, identifying data needs for modeling inputs, technology requirements, modeling considerations, and ensuring overarching governance was achieved for each objective and milestone. The working group identified seven distinct loan portfolios for which a model to estimate credit losses has been developed. For all seven loan portfolios, the data sets have been identified, populated, and internally validated. Old National has completed data and model validation testing. During the last half of 2019, the project plan targeted parallel processing of our existing allowance for loan losses model compared to the CECL model, as well as model sensitivity analysis, determination of qualitative adjustments, supporting analytics, and execution of the governance and approval process. Internal controls related to the CECL process were finalized prior to adoption on January 1, 2020. The CECL modeling measurements for estimating the current expected life-time credit losses for loans and debt securities includes the following major items: • Initial loss forecast – using a forecast period of one year for all allowance portfolio segments and off-balance-sheet credit exposures, using forward-looking economic scenarios of expected losses. • Historical loss forecast – for a period incorporating the remaining contractual life, adjusted for prepayments, and the changes in various economic variables during representative historical and recessionary periods. • Reversion period – using two years, which links the initial loss forecast to the historical loss forecast based on economic conditions at the measurement date. • Discounted cash flow aggregator – using the items above to estimate the life-time credit losses for all portfolios and losses for loans modified as a TDR. Old National adopted CECL on January 1, 2020 using the modified retrospective method for all financial assets measured at amortized cost and off-balance-sheet credit exposures. Results for the reporting periods after January 1, 2020 are presented under Topic 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. As of that date, Old National increased the allowance for credit losses for loans by $41.3 million and increased the allowance for credit losses for unfunded loan commitments by $4.5 million, since the ASU covers credit losses over the expected life of a loan as well as considering future changes in macroeconomic conditions. The increase related to the acquired loan portfolio totaled $27.1 million. Under the previously applicable accounting guidance, any remaining unamortized loan discount on an individual loan could be used to offset a charge-off for that loan, so the allowance for loan losses needed for the acquired loans was reduced by the remaining loan discounts. ASU 2016-13 requires an allowance for credit losses to be recognized in addition to the loan discount. The impact of adopting the ASU, and at each subsequent reporting period, is highly dependent on credit quality, macroeconomic forecasts and conditions, composition of our loans and available-for-sale securities portfolio, along with other management judgements. As of January 1, 2020, Old National recorded a cumulative-effect adjustment of $31.2 million to decrease retained earnings. Old National did not record an allowance for credit losses on its available-for-sale debt securities under the newly codified available-for-sale debt security impairment model, as the majority of these securities are government agency-backed securities for which the risk of loss is minimal. We adopted CECL using the prospective transition approach for financial assets purchased with credit deterioration (“PCD”) that were previously classified as purchased credit impaired and accounted for under ASC 310-30. In accordance with the standard, we did not reassess whether PCI assets met the definition of PCD assets as of the date of adoption. On January 1, 2020, the amortized cost basis of the PCD assets were adjusted to reflect the addition of $4.5 million to the allowance for credit losses for loans. The remaining noncredit discount in the amount of $11.8 million (based on the adjusted amortized cost basis) will be accreted into interest income at the effective interest rate as of January 1, 2020. 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 for loans. The allowance for credit losses was calculated by pooling loans of similar credit risk characteristics and credit monitoring procedures. The four loan portfolios are classified into seven segments of loans - commercial, commercial real estate, BBCC, residential real estate, indirect, direct, and home equity. 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 composition of loans by portfolio segment as of December 31, 2019 follows: (dollars in thousands) December 31, 2019 Segment December 31, 2019 Loans: Commercial $ 2,890,296 $ (75,142) $ 2,815,154 Commercial real estate 5,166,792 (277,539) 4,889,253 BBCC N/A 352,681 352,681 Residential real estate 2,334,289 — 2,334,289 Consumer 1,726,147 (1,726,147) N/A Indirect N/A 935,584 935,584 Direct N/A 228,524 228,524 Home equity N/A 562,039 562,039 Total $ 12,117,524 $ — $ 12,117,524 Allowance: Commercial $ (22,585) $ 1,226 $ (21,359) Commercial real estate (21,588) 1,053 (20,535) BBCC N/A (2,279) (2,279) Residential real estate (2,299) — (2,299) Consumer (8,147) 8,147 N/A Indirect N/A (5,319) (5,319) Direct N/A (1,863) (1,863) Home equity N/A (965) (965) Total $ (54,619) $ — $ (54,619) The following table illustrates the impact of adoption of the ASU: (dollars in thousands) December 31, 2019 Impact of January 1, 2020 Assets: Loans, net of unearned income: Commercial $ 2,815,154 $ 2,679 $ 2,817,833 Commercial real estate 4,889,253 1,637 4,890,890 BBCC 352,681 33 352,714 Residential real estate 2,334,289 105 2,334,394 Indirect 935,584 10 935,594 Direct 228,524 2 228,526 Home equity 562,039 12 562,051 Total 12,117,524 4,478 12,122,002 Allowance: Commercial (21,359) (7,150) (28,509) Commercial real estate (20,535) (25,548) (46,083) BBCC (2,279) (3,702) (5,981) Residential real estate (2,299) (6,986) (9,285) Indirect (5,319) 1,669 (3,650) Direct (1,863) 1,059 (804) Home equity (965) (689) (1,654) Total allowance for credit losses on loans (54,619) (41,347) (95,966) Net loans $ 12,062,905 $ (36,869) $ 12,026,036 Net deferred tax assets $ 29,705 $ 10,268 $ 39,973 Liabilities: Allowance for credit losses on unfunded loan commitments $ 2,656 $ 4,549 $ 7,205 Shareholders' equity: Retained earnings $ 682,185 $ (31,150) $ 651,035 In December 2018, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC approved a final rule to address changes to credit loss accounting under GAAP, including banking organizations’ implementation of CECL. The final rule provides banking organizations the option to phase in over a three-year period the day-one adverse effects on regulatory capital that may result from the adoption of the new accounting standard. In March 2020, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC published an interim final rule to delay the estimated impact on regulatory capital stemming from the implementation of CECL. The interim final rule maintains the three-year transition option in the previous rule and provides banks the option to delay for two years an estimate of CECL’s effect on regulatory capital, relative to the incurred loss methodology’s effect on regulatory capital, followed by a three-year transition period (five-year transition option). Old National is adopting the capital transition relief over the permissible five-year period. FASB ASC 350 – In January 2017, the FASB issued ASU No. 2017-04, Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment . To simplify the subsequent measurement of goodwill, the amendments eliminate Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, the income tax effects of tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments should be applied on a prospective basis. The nature of and reason for the change in accounting principle should be disclosed upon transition. The amendments in this update became effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 820 – In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement . The updated guidance improves the disclosure requirements on fair value measurements. The ASU removes certain disclosures required by Topic 820 related to transfers between Level 1 and Level 2 of the fair value hierarchy; the policy for timing of transfers between levels; the valuation processes for Level 3 fair value measurements; and for nonpublic entities, the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements held at the end of the reporting period. The ASU modifies certain disclosures required by Topic 820 related to disclosure of transfers into and out of Level 3 of the fair value hierarchy and purchases and issues of Level 3 assets and liabilities for nonpublic entities; the requirement to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly for investments in certain entities that calculate net asset value; and clarification that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The ASU adds certain disclosure requirements related to changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The amendments in this update became effective for fiscal years, and interim periods within those fiscal years beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 350 – In August 2018, the FASB issued ASU No. 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract . The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this update became effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and did not have a material impact on the financial statements. FASB ASC 842 – In March 2019, the FASB issued ASU No. 2019-01, Leases (Topic 842): Codification Improvements . The amendments in ASU No. 2019-01 align the guidance for fair value of the underlying asset by lessors that are not manufacturers or dealers in Topic 842 with that of existing guidance. As a result, the fair value of the underlying asset at lease commencement is its cost, reflecting any volume or trade discounts that may apply. However, if there has been a significant lapse of time between when the underlying asset is acquired and when the lease commences, the definition of fair value in Topic 820, Fair Value Measurement should be applied. ASU No. 2019-01 also requires lessors within the scope of Topic 942, Financial Services—Depository and Lending , to present all “principal payments received under leases” within investing activities. The amendments in this update became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the financial statements. FASB ASC 326, 815, and 825 – In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The amendments related to Topic 326 address accrued interest, transfers between classifications or categories for loans and debt securities, recoveries, vintage disclosures, and contractual extensions and renewal options and became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The improvements and clarifications related to Topic 815 address partial-term fair value hedges of interest-rate risk, amortization, and disclosure of fair value hedge basis adjustments and consideration of hedged contractually specified interest rate under the hypothetical method and became effective for the annual reporting period beginning January 1, 2020. The amendments related to Topic 825 contain various improvements to ASU 2016-01, including scope; held-to-maturity debt securities fair value disclosures; and remeasurement of equity securities at historical exchange rates and became effective for fiscal years and interim periods beginning after December 15, 2019. The amendments in this update did not have a material impact on the financial statements. FASB ASC 326 – In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments—Credit Losses (Topic 326): Targeted Transition Relief. These amendments provide targeted transition relief allowing entities to irrevocably elect the fair value option, on an instrument-by-instrument basis, for certain financial assets (excluding held-to-maturity debt securities) previously measured at amortized cost. In November 2019, the FASB issued 2019-11, Codification Improvements to Topic 326, Financial Instruments—Credit Losses , to make improvements to the credit losses standard. Most significantly, the standard clarifies guidance around how to report expected recoveries for PCD assets. “Expected recoveries” describes a situation in which an organization recognizes a full or partial writeoff of the amortized cost basis of a financial asset, but then later determines that the amount written off, or a portion of that amount, will in fact be recovered. This ASU permits organizations to record expected recoveries on PCD assets. In addition to other narrow technical improvements, the ASU also reinforces existing guidance that prohibits organizations from recognizing negative allowances for available-for-sale debt securities. The amendments in these updates became effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the consolidated financial statements. FASB ASC 718 – In November 2019, the FASB issued ASU No. 2019-08, Compensation – Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606): Codification Improvements—Share-Based Consideration Payable to a Customer. This ASU requires companies to measure and classify (on the balance sheet) share-based payments to customers by applying the guidance in Topic 718, Compensation—Stock Compensation . As a result, the amount recorded as a reduction in revenue would be measured based on the grant-date fair value of the share-based payment. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2019 and did not have a material impact on the consolidated financial statements. FASB ASC 326 and 842 – In February 2020, the FASB issued ASU No. 2020-02, Financial Instruments—Credit Losses (Topic 326) and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842). This ASU inserts a paragraph to address the November 2019 issuance of SEC Staff Accounting Bulletin (“SAB”) 119, Accounting for Loan Losses by Registrants Engaged in Lending Activities Subject to FASB ASC Topic 326 . The SAB updates existing staff guidance on developing a systematic methodology for estimating credit losses, and it explains the documentation the staff typically would expect from registrants in support of estimates of current expected credit losses (“CECL”) for lending activities, when material. The amendments in this update became effective upon issuance and 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 the LIBOR or other interbank offered rate on financial reporting. To help with the transition to new reference rates, the ASU provides optional expedients and exceptions for applying GAAP to affected contract modifications and hedge accounting relationships. The main provisions include: • A change in a contract’s reference interest rate would be accounted for as a continuation of that contract rather than as the creation of a new one for contracts, including loans, debt, leases, and other arrangements, that meet specific criteria. • When updating its hedging strategies in response to reference rate reform, an entity would be allowed to preserve its hedge accounting. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. Because the guidance is meant to help entities through the transition period, it will be in effect for a limited time and will not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. The amendments in this ASU are effective March 12, 2020 through December 31, 2022. ASU 2020-04 permits relief solely for reference rate reform actions and permits different elections over the effective date for legacy and new activity. Accordingly, Old National is evaluating and reassessing the elections on a quarterly basis. For current elections in effect regarding the assertion of the probability of forecasted transactions, Old National elects the expedient to assert the probability of the hedged interest payments and receipts regardless of any expected modification in terms related to reference rate reform. Old National believes the adoption of this guidance on activities subsequent to September 30, 2020 through December 31, 2022 will not have a material impact on the consolidated financial statements. Codification Improvements to Financial Instruments – In March 2020, the FASB issued ASU 2020-03, Codification Improvements to Financial Instruments . This ASU was issued to clarify and improve various financial instruments Topics. The amendments include the following improvements: • Issue 1 – Clarifies that all entities are required to provide fair value option disclosures. • Issue 2 – Clarifies the applicability of the portfolio exception in measuring fair value for nonfinancial items accounted for as derivatives. • Issue 3 – Clarifies that disclosure requirements in Topic 320 apply to disclosure requirements in Topic 942 for depository and lending institutions. • Issue 4 – Added cross-reference of line-of-credit or revolving-debt arrangements guidance to guidance in accounting for fees between debtor and creditor and third-party costs directly related to exchanges or modifications of debt instruments. • Issue 5 – Clarifies that fair value measurement disclosure requirements do not apply to entities using the net asset value per share practical expedient. • Issue 6 – Aligns the contractual term to measure expected credit losses for a net investment in a lease under the Credit Loss Standard (Topic 326) with the lease term determined under the Leases Standard (Topic 842). • Issue 7 – Clarifies that when an entity regains control of financial assets sold, an allowance for credit losses should be recorded in accordance with Topic 326. For Issue 1, Issue 2, Issue 4, and Issue 5, the amendments are effective upon issuance and did not have a material impact on the consolidated financial statements. For Issue 3, the amendments to ASU 2016-01 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and did not have a material impact on the consolidated financial statements. For Issues 6 and 7, the amendments to ASU 2016-13 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and did not have a material impact on the consolidated financial statements. Guidance on Non-TDR Loan Modifications due to COVID-19 – On March 22, 2020, a statement was issued by our banking regulators and titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” (the “Interagency Statement”) that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) that passed on March 27, 2020 further provides that a qualified loan modification is exempt by law from classification as a TDR as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak declared by the President of the United States under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. The Interagency Statement was subsequently revised in April 2020 to clarify the interaction of the original guidance with Section 4013 of the CARES Act, as well as setting forth the banking regulators’ views on consumer protection considerations. In accordance with such guidance, we are offering short-term modifications made in response to COVID-19 to borrowers who are current and otherwise not past due. These include short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. See Note 6 for further information on non-TDR loan modifications. Accounting Guidance Issued But Not Yet Adopted FASB ASC 715 – In August 2018, the FASB issued ASU No. 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans . The amendments in this update modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this update become effective for fiscal years ending after December 15, 2020 and will not have a material impact on the consolidated financial statements. FASB ASC 740 – In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU removes specific exceptions to the general principles in Topic 740 in GAAP. It eliminates the need for an organization to analyze whether the following apply in a given period: (1) exception to the incremental approach for intraperiod tax allocation; (2) exceptions to accounting for basis differences when there are ownership changes in foreign investments; and (3) exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The ASU also improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP for: (1) franchise taxes that are partially based on income; (2) transactions with a government that result in a step up in the tax basis of goodwill; (3) separate financial statements of legal entities that are not subject to tax; and (4) enacted changes in tax laws in interim periods. The amendments in this update become effective for fiscal years beginning after December 15, 2020, 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 321, 323, and 815 – In January 2020, the FASB issued ASU No. 2020-01, Investments – Equity Securities (Topic 321), Investments – Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) – Clarifying the Interactions Between Topic 321, Topic 323, and Topic 815 (a Consensus of the Emerging Issues Task Force). The ASU clarifies the interaction between ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities and the ASU on equity method investments. ASU 2016-01 provides companies with an alternative to measure certain equity securities without a readily determinable fair value at cost, minus impairment, if any, unless an observable transaction for an identical or similar security occurs. ASU 2020-01 clarifies that for purposes of applying the Topic 321 measurement alternative, an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting under Topic 323, immediately before applying or upon discontinuing the equity method. In addition, the new ASU provides direction that a company should not consider whether the underlying securities would be accounted for under the equity method or the fair value option when it is determining the accounting for certain forward contracts and purchased options, upon either settlement or exercise. The amendments in this update become effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Early adoption is permitted, and the amendments are to be applied prospectively. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. FASB ASC 470 and 815 – In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging— Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity , to clarify the accounting for certain financial instruments with characteristics of liabilities and equity. The amendments in this update reduce the number of accounting models for convertible debt instruments and convertible preferred stock by removing the cash conversion model and the beneficial conversion feature model. Limiting the accounting models will result in fewer embedded conversion features being separately recognized from the host contract. Convertible instruments that continue to be subject to separation models are (1) those with embedded conversion features that are not clearly and closely related to the host contract, that meet the definition of a derivative, and that do not qualify for a scope exception from derivative accounting and (2) convertible debt instruments issued with substantial premiums for which the premiums are recorded as paid-in-capital. In addition, this ASU improves disclosure requirements for convertible instruments and earnings-per-share guidance. The ASU also revises the derivative scope exception guidance to reduce form-over-substance-based accounting conclusions driven by remote contingent events. The amendments in this update are effective for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. Early adoption will be permitted, but no earlier than for fiscal years beginning after December 15, 2020. Old National is currently evaluating the impact of adopting the new guidance on the consolidated financial statements. Acquisitions and Dispositions of Businesses and Related Pro Forma Information – In May 2020, the SEC issued a final rule that revises the circumstances that require financial statements and related pro forma information for acquisitions and dispositions of businesses. The intent of the rule is to allow for more meaningful conclusions on when an acquired or disposed business is significant as well as to improve the related disclosure requirements. The changes are intended to improve the financial information about acquired or disposed businesses, facilitate more timely access to capital, and reduce the complexity and costs to prepare the disclosure. The final rule is effective January 1, 2021; however, voluntary early compliance is permitted.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Changes and Error Corrections [Abstract]
Schedule of Composition of Loans and Impact of Adoption	The composition of loans by portfolio segment as of December 31, 2019 follows: (dollars in thousands) December 31, 2019 Segment December 31, 2019 Loans: Commercial $ 2,890,296 $ (75,142) $ 2,815,154 Commercial real estate 5,166,792 (277,539) 4,889,253 BBCC N/A 352,681 352,681 Residential real estate 2,334,289 — 2,334,289 Consumer 1,726,147 (1,726,147) N/A Indirect N/A 935,584 935,584 Direct N/A 228,524 228,524 Home equity N/A 562,039 562,039 Total $ 12,117,524 $ — $ 12,117,524 Allowance: Commercial $ (22,585) $ 1,226 $ (21,359) Commercial real estate (21,588) 1,053 (20,535) BBCC N/A (2,279) (2,279) Residential real estate (2,299) — (2,299) Consumer (8,147) 8,147 N/A Indirect N/A (5,319) (5,319) Direct N/A (1,863) (1,863) Home equity N/A (965) (965) Total $ (54,619) $ — $ (54,619) The following table illustrates the impact of adoption of the ASU: (dollars in thousands) December 31, 2019 Impact of January 1, 2020 Assets: Loans, net of unearned income: Commercial $ 2,815,154 $ 2,679 $ 2,817,833 Commercial real estate 4,889,253 1,637 4,890,890 BBCC 352,681 33 352,714 Residential real estate 2,334,289 105 2,334,394 Indirect 935,584 10 935,594 Direct 228,524 2 228,526 Home equity 562,039 12 562,051 Total 12,117,524 4,478 12,122,002 Allowance: Commercial (21,359) (7,150) (28,509) Commercial real estate (20,535) (25,548) (46,083) BBCC (2,279) (3,702) (5,981) Residential real estate (2,299) (6,986) (9,285) Indirect (5,319) 1,669 (3,650) Direct (1,863) 1,059 (804) Home equity (965) (689) (1,654) Total allowance for credit losses on loans (54,619) (41,347) (95,966) Net loans $ 12,062,905 $ (36,869) $ 12,026,036 Net deferred tax assets $ 29,705 $ 10,268 $ 39,973 Liabilities: Allowance for credit losses on unfunded loan commitments $ 2,656 $ 4,549 $ 7,205 Shareholders' equity: Retained earnings $ 682,185 $ (31,150) $ 651,035 September 30, 2020 Segment September 30, 2020 Statement Portfolio After (dollars in thousands) Balance Reclassifications Reclassifications Loans: Commercial $ 4,264,568 $ (196,226) $ 4,068,342 Commercial real estate 5,701,493 (170,581) 5,530,912 BBCC N/A 366,807 366,807 Residential real estate 2,265,299 — 2,265,299 Consumer 1,661,149 (1,661,149) N/A Indirect N/A 932,759 932,759 Direct N/A 179,275 179,275 Home equity N/A 549,115 549,115 Total $ 13,892,509 $ — $ 13,892,509

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Summary of Table Reconciling Basic and Diluted Net Income Per Share	The following table reconciles basic and diluted net income per share: Three Months Ended Nine Months Ended (dollars and shares in thousands, except per share data) 2020 2019 2020 2019 Basic Net Income Per Share Net income $ 77,944 $ 69,781 $ 152,289 $ 189,021 Weighted average common shares outstanding 164,773 170,746 165,748 172,807 Basic Net Income Per Share $ 0.47 $ 0.41 $ 0.92 $ 1.10 Diluted Net Income Per Share Net income $ 77,944 $ 69,781 $ 152,289 $ 189,021 Weighted average common shares outstanding 164,773 170,746 165,748 172,807 Effect of dilutive securities: Restricted stock 611 761 586 672 Stock options and appreciation rights 35 44 36 48 Weighted average shares outstanding 165,419 171,551 166,370 173,527 Diluted Net Income Per Share $ 0.47 $ 0.41 $ 0.92 $ 1.09

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
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, fair value, and allowance for credit losses of the available-for-sale investment securities portfolio and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income (loss): (dollars in thousands) Amortized Unrealized Unrealized Allowance for Fair September 30, 2020 Available-for-Sale U.S. Treasury $ 9,899 $ 331 $ — $ — $ 10,230 U.S. government-sponsored entities and agencies 488,768 3,700 (927) — 491,541 Mortgage-backed securities - Agency 3,280,249 102,975 (944) — 3,382,280 States and political subdivisions 1,351,122 76,138 (765) — 1,426,495 Pooled trust preferred securities 13,773 — (6,246) — 7,527 Other securities 270,166 14,085 (790) — 283,461 Total available-for-sale securities $ 5,413,977 $ 197,229 $ (9,672) $ — $ 5,601,534 December 31, 2019 Available-for-Sale U.S. Treasury $ 17,567 $ 117 $ (2) $ — $ 17,682 U.S. government-sponsored entities and agencies 596,595 1,027 (4,638) — 592,984 Mortgage-backed securities - Agency 3,151,550 41,363 (9,052) — 3,183,861 States and political subdivisions 1,232,497 44,193 (1,047) — 1,275,643 Pooled trust preferred securities 13,811 — (5,589) — 8,222 Other securities 301,189 6,842 (1,332) — 306,699 Total available-for-sale securities $ 5,313,209 $ 93,542 $ (21,660) $ — $ 5,385,091
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) 2020 2019 2020 2019 Proceeds from sales of available-for-sale debt securities $ 39,637 $ 27,983 $ 296,075 $ 295,615 Proceeds from calls of available-for-sale debt securities 82,410 316,361 388,145 378,476 Total $ 122,047 $ 344,344 $ 684,220 $ 674,091 Realized gains on sales of available-for-sale debt securities $ 4,942 $ 340 $ 11,082 $ 3,443 Realized gains on calls of available-for-sale debt securities 10 86 50 89 Realized losses on sales of available-for-sale debt securities (30) (2) (500) (2,017) Realized losses on calls of available-for-sale debt securities (1) — (26) (29) Debt securities gains (losses), net $ 4,921 $ 424 $ 10,606 $ 1,486
Expected Maturities of Investment Securities Portfolio	Weighted average yield is based on amortized cost. September 30, 2020 (dollars in thousands) Amortized Fair Weighted Maturity Available-for-Sale Within one year $ 479,460 $ 488,426 2.49 % One to five years 2,808,889 2,909,519 2.38 Five to ten years 750,252 772,598 2.50 Beyond ten years 1,375,376 1,430,991 3.05 Total $ 5,413,977 $ 5,601,534 2.58 %
Available-for-Sale 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, 2020 Available-for-Sale U.S. government-sponsored entities $ 218,352 $ (927) $ — $ — $ 218,352 $ (927) Mortgage-backed securities - Agency 300,451 (834) 3,516 (110) 303,967 (944) States and political subdivisions 60,513 (765) — — 60,513 (765) Pooled trust preferred securities — — 7,527 (6,246) 7,527 (6,246) Other securities 27,574 (175) 20,615 (615) 48,189 (790) Total available-for-sale $ 606,890 $ (2,701) $ 31,658 $ (6,971) $ 638,548 $ (9,672) December 31, 2019 Available-for-Sale U.S. Treasury $ 999 $ (2) $ — $ — $ 999 $ (2) U.S. government-sponsored entities 357,647 (4,638) — — 357,647 (4,638) Mortgage-backed securities - Agency 786,245 (6,122) 212,056 (2,930) 998,301 (9,052) States and political subdivisions 120,166 (1,016) 7,006 (31) 127,172 (1,047) Pooled trust preferred securities — — 8,222 (5,589) 8,222 (5,589) Other securities 30,765 (182) 87,066 (1,150) 117,831 (1,332) Total available-for-sale $ 1,295,822 $ (11,960) $ 314,350 $ (9,700) $ 1,610,172 $ (21,660)
Trust Preferred Securities	The table below summarizes the relevant characteristics of our pooled trust preferred securities as well as our single issuer trust preferred securities that are included in the “other securities” category in this footnote. Each of the pooled trust preferred securities support a more senior tranche of security holders. Both pooled trust preferred securities 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. (dollars in thousands) Class Lowest Amortized Fair Unrealized # of Issuers Actual Expected Excess September 30, 2020 Pooled trust preferred securities: Pretsl XXVII LTD B B $ 4,238 $ 2,228 $ (2,010) 32/41 14.4% 10.8% 33.4% Trapeza Ser 13A A2A BBB 9,535 5,299 (4,236) 39/41 4.5% 6.4% 52.1% 13,773 7,527 (6,246) Single Issuer trust preferred securities: JP Morgan Chase & Co BBB- 4,806 4,412 (394) Total $ 18,579 $ 11,939 $ (6,640) (1) Lowest rating for the security provided by any nationally recognized credit rating agency.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule of Composition of Loans and Impact of Adoption	The composition of loans by portfolio segment as of December 31, 2019 follows: (dollars in thousands) December 31, 2019 Segment December 31, 2019 Loans: Commercial $ 2,890,296 $ (75,142) $ 2,815,154 Commercial real estate 5,166,792 (277,539) 4,889,253 BBCC N/A 352,681 352,681 Residential real estate 2,334,289 — 2,334,289 Consumer 1,726,147 (1,726,147) N/A Indirect N/A 935,584 935,584 Direct N/A 228,524 228,524 Home equity N/A 562,039 562,039 Total $ 12,117,524 $ — $ 12,117,524 Allowance: Commercial $ (22,585) $ 1,226 $ (21,359) Commercial real estate (21,588) 1,053 (20,535) BBCC N/A (2,279) (2,279) Residential real estate (2,299) — (2,299) Consumer (8,147) 8,147 N/A Indirect N/A (5,319) (5,319) Direct N/A (1,863) (1,863) Home equity N/A (965) (965) Total $ (54,619) $ — $ (54,619) The following table illustrates the impact of adoption of the ASU: (dollars in thousands) December 31, 2019 Impact of January 1, 2020 Assets: Loans, net of unearned income: Commercial $ 2,815,154 $ 2,679 $ 2,817,833 Commercial real estate 4,889,253 1,637 4,890,890 BBCC 352,681 33 352,714 Residential real estate 2,334,289 105 2,334,394 Indirect 935,584 10 935,594 Direct 228,524 2 228,526 Home equity 562,039 12 562,051 Total 12,117,524 4,478 12,122,002 Allowance: Commercial (21,359) (7,150) (28,509) Commercial real estate (20,535) (25,548) (46,083) BBCC (2,279) (3,702) (5,981) Residential real estate (2,299) (6,986) (9,285) Indirect (5,319) 1,669 (3,650) Direct (1,863) 1,059 (804) Home equity (965) (689) (1,654) Total allowance for credit losses on loans (54,619) (41,347) (95,966) Net loans $ 12,062,905 $ (36,869) $ 12,026,036 Net deferred tax assets $ 29,705 $ 10,268 $ 39,973 Liabilities: Allowance for credit losses on unfunded loan commitments $ 2,656 $ 4,549 $ 7,205 Shareholders' equity: Retained earnings $ 682,185 $ (31,150) $ 651,035 September 30, 2020 Segment September 30, 2020 Statement Portfolio After (dollars in thousands) Balance Reclassifications Reclassifications Loans: Commercial $ 4,264,568 $ (196,226) $ 4,068,342 Commercial real estate 5,701,493 (170,581) 5,530,912 BBCC N/A 366,807 366,807 Residential real estate 2,265,299 — 2,265,299 Consumer 1,661,149 (1,661,149) N/A Indirect N/A 932,759 932,759 Direct N/A 179,275 179,275 Home equity N/A 549,115 549,115 Total $ 13,892,509 $ — $ 13,892,509
Schedule of Composition of Loans	The composition of loans by portfolio segment follows: (dollars in thousands) September 30, January 1, Commercial (1) (2) $ 4,068,342 $ 2,817,833 Commercial real estate 5,530,912 4,890,890 BBCC 366,807 352,714 Residential real estate 2,265,299 2,334,394 Indirect 932,759 935,594 Direct 179,275 228,526 Home equity 549,115 562,051 Total loans 13,892,509 12,122,002 Allowance for credit losses (131,388) (95,966) Net loans $ 13,761,121 $ 12,026,036 (1) Includes direct finance leases of $34.4 million at September 30, 2020 and $47.2 million at January 1, 2020. (2) Includes PPP loans of $1.479 billion at September 30, 2020.
Schedule of Activity in Allowance for Loan Losses	Old National’s activity in the allowance for credit losses for loans by portfolio segment for the three and nine months ended September 30, 2020 was as follows: (dollars in thousands) Balance at Impact of Sub-Total Charge-offs Recoveries Provision Balance at Three Months Ended Commercial $ 29,618 $ — $ 29,618 $ (128) $ 2,192 $ (3,289) $ 28,393 Commercial real estate 71,069 — 71,069 (2,709) 3,379 4,173 75,912 BBCC 6,332 — 6,332 (10) — 15 6,337 Residential real estate 14,244 — 14,244 (321) 220 (219) 13,924 Indirect 4,453 — 4,453 (556) 587 (394) 4,090 Direct 835 — 835 (445) 187 248 825 Home equity 1,843 — 1,843 — 598 (534) 1,907 Total allowance for credit losses $ 128,394 $ — $ 128,394 $ (4,169) $ 7,163 $ — $ 131,388 Nine Months Ended Commercial $ 21,359 $ 7,150 $ 28,509 $ (5,303) $ 3,100 $ 2,087 $ 28,393 Commercial real estate 20,535 25,548 46,083 (5,164) 4,297 30,696 75,912 BBCC 2,279 3,702 5,981 (92) 122 326 6,337 Residential real estate 2,299 6,986 9,285 (637) 431 4,845 13,924 Indirect 5,319 (1,669) 3,650 (2,125) 1,494 1,071 4,090 Direct 1,863 (1,059) 804 (1,326) 571 776 825 Home equity 965 689 1,654 (199) 758 (306) 1,907 Total allowance for credit losses $ 54,619 $ 41,347 $ 95,966 $ (14,846) $ 10,773 $ 39,495 $ 131,388 (dollars in thousands) Three Months Ended Nine Months Ended Allowance for credit losses on unfunded loan commitments: Balance at beginning of period $ 11,026 $ 2,656 Impact of adopting ASC 326 — 4,549 Sub-Total 11,026 7,205 Expense (reversal of expense) for credit losses — 3,821 Balance at end of period $ 11,026 $ 11,026 Old National's activity in the allowance for loan losses for the three and nine months ended September 30, 2019 was as follows: (dollars in thousands) Commercial Commercial Residential Consumer Total Three Months Ended September 30, 2019 Balance at beginning of period $ 22,548 $ 23,311 $ 2,269 $ 8,164 $ 56,292 Charge-offs (420) (191) (384) (1,721) (2,716) Recoveries 374 669 26 828 1,897 Provision (373) 465 452 893 1,437 Balance at end of period $ 22,129 $ 24,254 $ 2,363 $ 8,164 $ 56,910 Nine Months Ended September 30, 2019 Balance at beginning of period $ 21,742 $ 23,470 $ 2,277 $ 7,972 $ 55,461 Charge-offs (1,184) (815) (702) (5,784) (8,485) Recoveries 1,083 2,444 107 2,817 6,451 Provision 488 (845) 681 3,159 3,483 Balance at end of period $ 22,129 $ 24,254 $ 2,363 $ 8,164 $ 56,910 The following table disaggregates Old National's allowance for credit losses and amortized cost basis in loans by measurement methodology at December 31, 2019: (dollars in thousands) Commercial Commercial Residential Consumer Total December 31, 2019 Allowance for loan losses: Individually evaluated for impairment $ 7,891 $ 1,006 $ — $ — $ 8,897 Collectively evaluated for impairment 14,692 20,582 2,299 7,954 45,527 Loans acquired with deteriorated credit quality 2 — — 193 195 Total allowance for loan losses $ 22,585 $ 21,588 $ 2,299 $ 8,147 $ 54,619 Loans and leases outstanding: Individually evaluated for impairment $ 41,479 $ 63,288 $ — $ — $ 104,767 Collectively evaluated for impairment 2,843,536 5,084,737 2,326,907 1,723,715 11,978,895 Loans acquired with deteriorated credit quality 5,281 18,767 7,382 2,432 33,862 Total loans and leases outstanding $ 2,890,296 $ 5,166,792 $ 2,334,289 $ 1,726,147 $ 12,117,524
Schedule of Risk Category of Loans and Amortized Cost	The following table summarizes the risk category of commercial, commercial real estate, and BBCC loans by loan portfolio segment and class of loan: Risk Rating (dollars in thousands) Pass Criticized Classified - Classified - Classified - Total September 30, 2020 Commercial: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 272,695 $ 6,083 $ 8,391 $ 3,010 $ 1,200 $ 291,379 2016 124,413 3,633 2,814 492 — 131,352 2017 250,815 8,739 12,156 9,984 183 281,877 2018 199,031 12,840 8,659 5,207 684 226,421 2019 480,653 9,420 6,145 4,094 — 500,312 2020 1,932,380 15,371 6,455 829 — 1,955,035 Revolving Loans 477,815 12,160 18,231 2,433 — 510,639 Revolving to Term Loans 155,265 3,226 6,765 6,071 — 171,327 Total $ 3,893,067 $ 71,472 $ 69,616 $ 32,120 $ 2,067 $ 4,068,342 Commercial real estate: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 615,539 $ 22,234 $ 18,466 $ 12,753 $ 3,672 $ 672,664 2016 533,045 17,147 7,012 2,308 19,637 579,149 2017 717,345 72,598 31,695 12,282 8,674 842,594 2018 829,583 20,181 16,511 4,206 — 870,481 2019 1,073,991 39,005 4,246 2,108 1,876 1,121,226 2020 1,042,060 2,361 12,538 — — 1,056,959 Revolving Loans 29,581 — — — — 29,581 Revolving to Term Loans 334,075 19,767 4,075 341 — 358,258 Total $ 5,175,219 $ 193,293 $ 94,543 $ 33,998 $ 33,859 $ 5,530,912 BBCC: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 8,607 $ — $ — $ — $ 89 $ 8,696 2016 27,306 716 45 106 — 28,173 2017 39,173 479 266 520 — 40,438 2018 54,175 821 40 230 392 55,658 2019 79,760 1,638 622 357 77 82,454 2020 70,997 1,519 386 111 — 73,013 Revolving Loans 51,601 1,891 341 139 — 53,972 Revolving to Term Loans 20,864 1,030 929 1,580 — 24,403 Total $ 352,483 $ 8,094 $ 2,629 $ 3,043 $ 558 $ 366,807 Payment Performance (dollars in thousands) Performing Nonperforming Total September 30, 2020 Residential real estate: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 698,318 $ 19,336 $ 717,654 2016 228,088 2,807 230,895 2017 226,483 696 227,179 2018 153,172 836 154,008 2019 498,685 175 498,860 2020 436,512 65 436,577 Revolving Loans — — — Revolving to Term Loans 126 — 126 Total $ 2,241,384 $ 23,915 $ 2,265,299 Indirect: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 28,932 $ 198 $ 29,130 2016 66,145 572 66,717 2017 114,557 828 115,385 2018 155,493 628 156,121 2019 282,501 336 282,837 2020 282,427 57 282,484 Revolving Loans — — — Revolving to Term Loans 85 — 85 Total $ 930,140 $ 2,619 $ 932,759 Direct: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 22,077 $ 571 $ 22,648 2016 10,770 247 11,017 2017 19,894 113 20,007 2018 35,257 183 35,440 2019 34,149 79 34,228 2020 30,053 71 30,124 Revolving Loans 24,110 — 24,110 Revolving to Term Loans 1,700 1 1,701 Total $ 178,010 $ 1,265 $ 179,275 Home equity: Term Loans at Amortized Cost by Origination Year: Prior to 2016 $ 61 $ 171 $ 232 2016 244 11 255 2017 936 43 979 2018 662 — 662 2019 1,091 29 1,120 2020 — 20 20 Revolving Loans 521,932 — 521,932 Revolving to Term Loans 20,022 3,893 23,915 Total $ 544,948 $ 4,167 $ 549,115 The risk category or commercial and commercial real estate loans by class of loans at December 31, 2019 was as follows: December 31, 2019 (dollars in thousands) Commercial Commercial Commercial Corporate Credit Exposure Credit Risk Profile by Grade: Pass $ 2,702,605 $ 665,512 $ 4,191,455 Criticized 84,676 34,651 115,514 Classified - substandard 63,979 — 101,693 Classified - nonaccrual 22,240 12,929 38,822 Classified - doubtful 16,796 — 6,216 Total $ 2,890,296 $ 713,092 $ 4,453,700 The following table presents the recorded investment in residential and consumer loans based on payment activity at December 31, 2019: Consumer (dollars in thousands) Residential Home Equity Auto Other December 31, 2019 Performing $ 2,311,670 $ 555,025 $ 1,013,760 $ 147,383 Nonperforming 22,619 3,996 3,527 2,456 Total $ 2,334,289 $ 559,021 $ 1,017,287 $ 149,839
Schedule of Past Due Financing Receivables	The following table presents the aging of the amortized cost basis in past due loans as of September 30, 2020 by class of loans: (dollars in thousands) 30-59 Days 60-89 Days Past Due Total Current Total September 30, 2020 Commercial $ 622 $ 2,594 $ 2,233 $ 5,449 $ 4,062,893 $ 4,068,342 Commercial Real Estate 310 21,118 23,572 45,000 5,485,912 5,530,912 BBCC 31 77 494 602 366,205 366,807 Residential 14,508 3,950 7,833 26,291 2,239,008 2,265,299 Indirect 3,729 732 449 4,910 927,849 932,759 Direct 1,698 203 306 2,207 177,068 179,275 Home equity 861 137 1,258 2,256 546,859 549,115 Total $ 21,759 $ 28,811 $ 36,145 $ 86,715 $ 13,805,794 $ 13,892,509
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: January 1, 2020 June 30, 2020 September 30, 2020 (dollars in thousands) Nonaccrual Nonaccrual Nonaccrual Nonaccrual Past Due Commercial $ 40,103 $ 37,785 $ 34,188 $ 3,543 $ 38 Commercial Real Estate 58,350 51,100 67,859 31,606 20 BBCC 4,530 4,048 3,601 — — Residential 20,970 24,315 23,914 — — Indirect 3,318 2,835 2,619 — 30 Direct 1,303 1,137 1,264 54 2 Home equity 3,857 4,326 4,166 — — Total $ 132,431 $ 125,546 $ 137,611 $ 35,203 $ 90 Type of Collateral (dollars in thousands) Real Blanket Investment Auto Other September 30, 2020 Commercial $ 8,425 $ 18,624 $ 5,560 $ 530 $ 1,048 Commercial Real Estate 52,911 85 1,165 — 13,698 BBCC 1,716 1,665 70 146 5 Residential 23,914 — — — — Indirect — — — 2,619 — Direct 1,005 — 2 247 5 Home equity 4,166 — — — — Total loans $ 92,137 $ 20,374 $ 6,797 $ 3,542 $ 14,756
Schedule of Activity in Trouble Debt Restructurings	The following table presents activity in TDRs: (dollars in thousands) Beginning (Charge-offs)/ (Payments)/ Additions Ending Three Months Ended September 30, 2020 Commercial $ 10,598 $ 1,326 $ (3,168) $ — $ 8,756 Commercial Real Estate 12,706 1,993 (3,950) 5,907 16,656 BBCC 147 (52) 43 — 138 Residential 3,012 — (171) — 2,841 Indirect — 2 (2) — — Direct 779 (11) (18) — 750 Home equity 367 1 (77) — 291 Total $ 27,609 $ 3,259 $ (7,343) $ 5,907 $ 29,432 Nine Months Ended September 30, 2020 Commercial $ 12,412 $ 632 $ (4,288) $ — $ 8,756 Commercial Real Estate 14,277 741 (4,269) 5,907 16,656 BBCC 578 (22) (418) — 138 Residential 3,107 — (266) — 2,841 Indirect — 7 (7) — — Direct 983 (9) (224) — 750 Home equity 381 2 (92) — 291 Total $ 31,738 $ 1,351 $ (9,564) $ 5,907 $ 29,432 The following table presents activity in TDRs for the three and nine months ended September 30, 2019: (dollars in thousands) Commercial Commercial Residential Consumer Total Three Months Ended September 30, 2019 Balance at beginning of period $ 18,872 $ 19,363 $ 3,080 $ 2,516 $ 43,831 (Charge-offs)/recoveries 12 13 — 7 32 (Payments)/disbursements (2,303) (1,057) (865) (322) (4,547) Additions 530 — 557 — 1,087 Balance at end of period $ 17,111 $ 18,319 $ 2,772 $ 2,201 $ 40,403 Nine Months Ended September 30, 2019 Balance at beginning of period $ 10,275 $ 27,671 $ 3,390 $ 2,374 $ 43,710 (Charge-offs)/recoveries (89) (58) — 8 (139) (Payments)/disbursements (3,307) (19,321) (1,175) (497) (24,300) Additions 10,232 10,027 557 316 21,132 Balance at end of period $ 17,111 $ 18,319 $ 2,772 $ 2,201 $ 40,403
Schedule of Volume of Loan Deferrals	The table below presents loan deferrals by loan category: (dollars in thousands) June 30, 2020 September 30, 2020 September 30, 2020 Commercial and commercial real estate $ 1,170,119 $ 125,603 105 Residential real estate 78,639 1,654 12 Consumer 54,786 10,315 368 Total $ 1,303,544 $ 137,572 485 (1) Includes second deferrals between 90 and 180 days totaling $8.8 million of commercial and commercial real estate loans, $0.4 million of residential real estate loans, and $1.0 million of consumer loans.
Schedule of Loans by Class Modified as Troubled Debt Restructuring	The following table presents loans modified as TDRs that occurred during the nine months ended September 30, 2020 and 2019: (dollars in thousands) Total Nine Months Ended September 30, 2020 TDR: Number of loans 1 Pre-modification outstanding recorded investment $ 5,907 Post-modification outstanding recorded investment 5,907 Nine Months Ended September 30, 2019 TDR: Number of loans 14 Pre-modification outstanding recorded investment $ 21,132 Post-modification outstanding recorded investment 21,132
Schedule of Impaired Loans	Only purchased loans that have experienced subsequent impairment since the date acquired (excluding loans acquired with deteriorated credit quality) are included in the table below. (dollars in thousands) Recorded Unpaid Principal Related December 31, 2019 With no related allowance recorded: Commercial $ 23,227 $ 23,665 $ — Commercial Real Estate - Construction 12,929 12,929 — Commercial Real Estate - Other 37,674 38,112 — Residential 1,774 1,794 — Consumer 403 568 — With an allowance recorded: Commercial 18,252 18,305 7,891 Commercial Real Estate - Other 12,685 12,685 1,006 Residential 1,201 1,201 39 Consumer 1,094 1,094 55 Total $ 109,239 $ 110,353 $ 8,991 The average balance of impaired loans during the three and nine months ended September 30, 2019 are included in the table below. (dollars in thousands) Three Months Ended Nine Months Ended Average Recorded Investment With no related allowance recorded: Commercial $ 20,147 $ 20,593 Commercial Real Estate - Construction 10,964 5,445 Commercial Real Estate - Other 34,073 39,821 Residential 2,066 2,145 Consumer 1,166 1,096 With an allowance recorded: Commercial 19,866 17,248 Commercial Real Estate - Construction 2,764 8,294 Commercial Real Estate - Other 21,019 24,806 Residential 924 907 Consumer 1,204 1,260 Total $ 114,193 $ 121,615

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2020
Banking and Thrift [Abstract]
Activity in Other Real Estate Owned	The following table presents activity in other real estate owned: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 1,786 $ 2,819 $ 2,169 $ 3,232 Additions 368 411 572 1,084 Sales (843) (271) (1,267) (1,248) Impairments (63) (18) (226) (127) Balance at end of period (1) $ 1,248 $ 2,941 $ 1,248 $ 2,941 (1) Includes repossessed personal property of $0.2 million at September 30, 2020 and $0.5 million at September 30, 2019.

Premises and Equipment (Tables)

Premises and Equipment (Tables)	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	The composition of premises and equipment was as follows: (dollars in thousands) September 30, December 31, Land $ 72,451 $ 79,569 Buildings 372,746 380,925 Furniture, fixtures, and equipment 108,323 112,654 Leasehold improvements 44,108 44,136 Total 597,628 617,284 Accumulated depreciation (134,375) (126,359) Premises and equipment, net $ 463,253 $ 490,925

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Lessee Disclosure [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) 2020 2019 2020 2019 Operating lease cost occupancy/equipment expense $ 3,952 $ 4,280 $ 19,786 $ 12,973 Finance lease cost: Amortization of right-of-use assets occupancy expense 311 166 733 485 Interest on lease liabilities interest expense 98 80 267 241 Short-term lease cost occupancy expense — 1 — 2 Sub-lease income occupancy expense (129) (193) (378) (553) Total $ 4,232 $ 4,334 $ 20,408 $ 13,148
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 $ 77,482 $ 95,477 Operating lease liabilities 88,552 99,500 Finance Leases Premises and equipment, net 11,662 7,170 Other borrowings 12,062 7,406 Weighted-Average Remaining Lease Term (in Years) Operating leases 10.6 10.6 Finance leases 10.5 11.3 Weighted-Average Discount Rate Operating leases 3.40 % 3.45 % Finance leases 3.45 % 4.43 %
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) 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12,194 $ 13,201 Operating cash flows from finance leases 267 241 Financing cash flows from finance leases 569 344
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, 2020: (dollars in thousands) Operating Finance 2020 $ 3,735 $ 346 2021 14,344 1,394 2022 13,277 1,412 2023 9,244 1,438 2024 8,073 1,444 Thereafter 57,791 8,442 Total undiscounted lease payments 106,464 14,476 Amounts representing interest (17,912) (2,414) Lease liability $ 88,552 $ 12,062
Schedule of Maturity Analysis of Tenant Leases	The following table presents a maturity analysis of the Company’s tenant leases at September 30, 2020: (dollars in thousands) Tenant Leases 2020 $ 628 2021 2,327 2022 1,878 2023 1,523 2024 1,409 Thereafter 2,520 Total undiscounted lease payments $ 10,285

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill	The following table shows the changes in the carrying amount of goodwill: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 1,036,994 $ 1,036,258 $ 1,036,994 $ 1,036,258 Acquisitions and adjustments — 736 — 736 Balance at end of period $ 1,036,994 $ 1,036,994 $ 1,036,994 $ 1,036,994
Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets	The gross carrying amount and accumulated amortization of other intangible assets were as follows: (dollars in thousands) Gross Accumulated Net September 30, 2020 Core deposit $ 112,723 $ (66,651) $ 46,072 Customer trust relationships 16,547 (13,361) 3,186 Total intangible assets $ 129,270 $ (80,012) $ 49,258 December 31, 2019 Core deposit $ 119,051 $ (63,020) $ 56,031 Customer trust relationships 16,547 (12,473) 4,074 Total intangible assets $ 135,598 $ (75,493) $ 60,105
Schedule of Estimated Amortization Expense for Future Years	Estimated amortization expense for future years is as follows: (dollars in thousands) 2020 remaining $ 3,244 2021 11,336 2022 9,014 2023 7,053 2024 5,645 Thereafter 12,966 Total $ 49,258

Loan Servicing Rights (Tables)

Loan Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Components of Loan Servicing Rights and Valuation Allowance	The following table summarizes the carrying values and activity related to loan servicing rights and the related valuation allowance: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Balance at beginning of period $ 26,288 $ 24,364 $ 25,399 $ 24,512 Additions 4,446 2,097 9,849 4,026 Amortization (2,885) (1,717) (7,399) (3,794) Balance before valuation allowance at end of period 27,849 24,744 27,849 24,744 Valuation allowance: Balance at beginning of period (2,253) (32) (31) (15) (Additions)/recoveries (95) (89) (2,317) (106) Balance at end of period (2,348) (121) (2,348) (121) Loan servicing rights, net $ 25,501 $ 24,623 $ 25,501 $ 24,623

Qualified Affordable Housing _2

Qualified Affordable Housing Projects and Other Tax Credit Investments (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 December 31, 2019 Investment Accounting Method Investment Unfunded Commitment (1) Investment Unfunded Commitment LIHTC Proportional amortization $ 34,434 $ 8,028 $ 29,735 $ 3,911 FHTC Equity 26,083 22,633 22,403 17,886 Renewable Energy Equity 5,345 2,086 7,523 4,129 Total $ 65,862 $ 32,747 $ 59,661 $ 25,926 (1) All commitments will be paid by Old National by 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 Three Months Ended September 30, 2020 LIHTC $ 776 $ (1,015) FHTC 816 (1,479) Renewable Energy 2,299 (2,262) Total $ 3,891 $ (4,756) Three Months Ended September 30, 2019 LIHTC $ 793 $ (992) FHTC 1,113 (1,244) CReED 13 — Renewable Energy 85 (70) Total $ 2,004 $ (2,306) Nine Months Ended September 30, 2020 LIHTC $ 2,329 $ (3,053) FHTC 5,959 (4,191) Renewable Energy 2,958 (2,970) Total $ 11,246 $ (10,214) Nine Months Ended September 30, 2019 LIHTC $ 2,376 $ (3,076) FHTC 1,113 (1,244) CReED 13 — Renewable Energy 913 (847) Total $ 4,415 $ (5,167) (1) The amortization expense for the LIHTC investments is included in our income tax expense. The amortization expense for the FHTC, CReED, 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, CReED, and Renewable Energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) of the investments’ income (loss).

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2020
Transfers and Servicing [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, At December 31, At or for the Nine Months Ended September 30, (dollars in thousands) Outstanding at period end $ 399,141 $ 327,782 $ 337,551 Average amount outstanding during the period 355,039 N/A 344,294 Maximum amount outstanding at any month-end during the period 399,141 N/A 367,884 Weighted-average interest rate: During the period 0.27 % N/A 0.80 % At period end 0.12 % 0.53 % 0.74 %
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, 2020 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 $ 399,141 $ — $ — $ — $ 399,141 Total $ 399,141 $ — $ — $ — $ 399,141

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	9 Months Ended
	Sep. 30, 2020
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 0.13% to 4.96% and variable rates 0.11% to 0.13%) maturing October 2020 to August 2035 $ 2,075,660 $ 1,800,664 ASC 815 fair value hedge and other basis adjustments 11,988 22,183 Total $ 2,087,648 $ 1,822,847
Summary of Contractual Maturities of FHLB Advances	Contractual maturities of FHLB advances at September 30, 2020 were as follows: (dollars in thousands) Due in 2020 $ 150,000 Due in 2021 20,000 Due in 2022 30,500 Due in 2023 160 Due in 2024 125,000 Thereafter 1,750,000 ASC 815 fair value hedge and other basis adjustments 11,988 Total $ 2,087,648

Other Borrowings (Tables)

Other Borrowings (Tables)	9 Months Ended
	Sep. 30, 2020
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 (598) (715) Junior subordinated debentures (variable rates of 1.77% to 2.00%) maturing March 2035 to June 2037 42,000 52,310 Other basis adjustments (3,231) (2,833) Old National Bank: Finance lease liabilities 12,062 7,406 Subordinated debentures (fixed rate 5.75%) 12,000 12,000 Other 450 517 Total other borrowings $ 237,683 $ 243,685 The following table summarizes the terms of our outstanding junior subordinated debentures: (dollars in thousands) Rate at September 30, Name of Trust Issuance Date Issuance Rate Maturity Date St. Joseph Capital Trust II March 2005 $ 5,000 3-month LIBOR plus 1.75% 2.00% March 17, 2035 Anchor Capital Trust III August 2005 5,000 3-month LIBOR plus 1.55% 1.77% September 30, 2035 Home Federal Statutory September 2006 15,000 3-month LIBOR plus 1.65% 1.90% September 15, 2036 Monroe Bancorp Capital July 2006 3,000 3-month LIBOR plus 1.60% 1.88% October 7, 2036 Tower Capital Trust 3 December 2006 9,000 3-month LIBOR plus 1.69% 1.93% March 1, 2037 Monroe Bancorp Statutory March 2007 5,000 3-month LIBOR plus 1.60% 1.85% June 15, 2037 Total $ 42,000
Contractual Maturities of Other Borrowings	Contractual maturities of other borrowings at September 30, 2020 were as follows: (dollars in thousands) Due in 2020 $ 250 Due in 2021 1,025 Due in 2022 1,073 Due in 2023 1,132 Due in 2024 176,170 Thereafter 61,412 Unamortized debt issuance costs and other basis adjustments (3,379) Total $ 237,683

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 Balance at beginning of period $ 144,811 $ — $ 4,355 $ (123) $ 149,043 Other comprehensive income (loss) before 5,234 — (8) — 5,226 Amounts reclassified from AOCI to income (1) (3,837) — (1,169) 21 (4,985) Balance at end of period $ 146,208 $ — $ 3,178 $ (102) $ 149,284 Three Months Ended September 30, 2019 Balance at beginning of period $ 48,701 $ (7,729) $ 1,220 $ (155) $ 42,037 Other comprehensive income (loss) before 15,876 — (58) — 15,818 Amounts reclassified from AOCI to income (1) (335) 992 (13) 15 659 Balance at end of period $ 64,242 $ (6,737) $ 1,149 $ (140) $ 58,514 Nine Months Ended September 30, 2020 Balance at beginning of period $ 56,131 $ — $ 240 $ (164) $ 56,207 Other comprehensive income (loss) before 98,336 — 5,692 — 104,028 Amounts reclassified from AOCI to income (1) (8,259) — (2,754) 62 (10,951) Balance at end of period $ 146,208 $ — $ 3,178 $ (102) $ 149,284 Nine Months Ended September 30, 2019 Balance at beginning of period $ (37,348) $ (8,515) $ 1,099 $ (186) $ (44,950) Other comprehensive income (loss) before 102,737 — 357 — 103,094 Amounts reclassified from AOCI to income (1) (1,147) 1,778 (307) 46 370 Balance at end of period $ 64,242 $ (6,737) $ 1,149 $ (140) $ 58,514 (1) See tables below for details about reclassifications to income.
Reclassifications out of AOCI	The following table summarizes the significant amounts reclassified out of each component of AOCI for the three months ended September 30, 2020 and 2019: Details about AOCI Components Amount Reclassified Affected Line Item in the Three Months Ended (dollars in thousands) 2020 2019 Unrealized gains and losses on $ 4,921 $ 424 Debt securities gains (losses), net (1,084) (89) Income tax (expense) benefit $ 3,837 $ 335 Net income Unrealized gains and losses on $ — $ (1,384) Interest income (expense) — 392 Income tax (expense) benefit $ — $ (992) Net income Gains and losses on cash flow hedges $ 1,550 $ 21 Interest income (expense) (381) (8) Income tax (expense) benefit $ 1,169 $ 13 Net income Amortization of defined benefit Actuarial gains (losses) $ (28) $ (20) Salaries and employee benefits 7 5 Income tax (expense) benefit $ (21) $ (15) Net income Total reclassifications for the period $ 4,985 $ (659) Net income The following table summarizes the significant amounts reclassified out of each component of AOCI for the nine months ended September 30, 2020 and 2019: Details about AOCI Components Amount Reclassified Affected Line Item in the Nine Months Ended (dollars in thousands) 2020 2019 Unrealized gains and losses on $ 10,606 $ 1,486 Debt securities gains (losses), net (2,347) (339) Income tax (expense) benefit $ 8,259 $ 1,147 Net income Unrealized gains and losses on $ — $ (2,405) Interest income (expense) — 627 Income tax (expense) benefit $ — $ (1,778) Net income Gains and losses on cash flow hedges $ 3,651 $ 412 Interest income (expense) (897) (105) Income tax (expense) benefit $ 2,754 $ 307 Net income Amortization of defined benefit Actuarial gains (losses) $ (82) $ (61) Salaries and employee benefits 20 15 Income tax (expense) benefit $ (62) $ (46) Net income Total reclassifications for the period $ 10,951 $ (370) Net income

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2020
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) 2020 2019 2020 2019 Provision at statutory rate of 21% $ 18,920 $ 17,437 $ 37,200 $ 48,245 Tax-exempt income: Tax-exempt interest (2,682) (2,511) (7,985) (7,645) Section 291/265 interest disallowance 36 113 153 346 Company-owned life insurance income (386) (568) (1,657) (1,806) Tax-exempt income (3,032) (2,966) (9,489) (9,105) State income taxes 656 1,496 2,367 5,053 Interim period effective rate adjustment (2,501) (1,598) 840 (557) Tax credit investments - federal (2,575) (2,443) (6,296) (3,577) Other, net 686 1,328 232 658 Income tax expense $ 12,154 $ 13,254 $ 24,854 $ 40,717 Effective tax rate 13.5 % 16.0 % 14.0 % 17.7 %
Schedule of Significant Components of Net Deferred Tax Assets (Liabilities)	Significant components of net deferred tax assets (liabilities) were as follows: (dollars in thousands) September 30, December 31, Deferred Tax Assets Allowance for loan losses, net of recapture $ 34,677 $ 14,179 Benefit plan accruals 15,636 19,673 Alternative minimum tax credit — 1,272 Net operating loss carryforwards 18,982 25,336 Deferred gain on securities 2,272 3,754 Acquired loans 12,542 16,784 Operating lease liabilities 24,512 26,503 Tax credit investments and other partnerships 1,264 1,765 Other real estate owned 27 141 Other, net 580 591 Total deferred tax assets 110,492 109,998 Deferred Tax Liabilities Purchase accounting (18,038) (17,564) Loan servicing rights (6,213) (6,289) Premises and equipment (14,267) (12,167) Prepaid expenses (956) (973) Operating lease right-of-use assets (21,718) (25,448) Unrealized gains on available-for-sale investment securities (41,349) (15,751) Unrealized gains on hedges (1,035) (78) Other, net (2,767) (2,023) Total deferred tax liabilities (106,343) (80,293) Net deferred tax assets $ 4,149 $ 29,705

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Fair Value of Derivative Financial Instruments	The following table summarizes the fair value of derivative financial instruments utilized by Old National: (dollars in thousands) Balance Fair Balance Fair September 30, 2020 Derivatives designated as hedging instruments Interest rate contracts Other assets $ 18,758 Other liabilities $ 2,367 Total derivatives designated as hedging instruments $ 18,758 $ 2,367 Derivatives not designated as hedging instruments Interest rate contracts (1) Other assets $ 124,712 Other liabilities $ 16,282 Mortgage contracts Other assets 10,592 Other liabilities — Foreign currency contracts Other assets 256 Other liabilities 127 Total derivatives not designated as hedging instruments $ 135,560 $ 16,409 Total $ 154,318 $ 18,776 December 31, 2019 Derivatives designated as hedging instruments Interest rate contracts Other assets $ 7,157 Other liabilities $ 1,046 Total derivatives designated as hedging instruments $ 7,157 $ 1,046 Derivatives not designated as hedging instruments Interest rate contracts (1) Other assets $ 42,224 Other liabilities $ 10,883 Mortgage contracts Other assets 1,702 Other liabilities 354 Foreign currency contracts Other assets 218 Other liabilities 110 Total derivatives not designated as hedging instruments $ 44,144 $ 11,347 Total $ 51,301 $ 12,393 (1) The fair values of counterparty interest rate swaps are zero due to the settlement of centrally-cleared variation margin rules. The net adjustment was $109.2 million as of September 30, 2020 and $31.6 million as of December 31, 2019.
Summary of Interest Rate Derivatives	Summary information about the interest rate swaps designated as fair value hedges is as follows: (dollars in thousands) September 30, December 31, Notional amounts $ 380,500 $ 130,500 Weighted average pay rates 0.20 % 1.82 % Weighted average receive rates 1.33 % 2.20 % Weighted average maturity (in years) 2.4 2.8 Fair value of swaps $ 10,233 $ 1,555 Summary information about the interest rate swaps designated as cash flow hedges is as follows: (dollars in thousands) September 30, December 31, Notional amounts $ 325,000 $ 25,000 Weighted average pay rates 0.74 % 3.52 % Weighted average receive rates 0.34 % 1.93 % Weighted average maturity (in years) 3.8 2.1 Unrealized gains (losses) $ (2,222) $ (954) (dollars in thousands) September 30, December 31, Notional amounts $ 300,000 $ 300,000 Weighted average cap rates 3.21 % 3.21 % Weighted average floor rates 2.21 % 2.21 % Weighted average rates 0.16 % 1.70 % Weighted average maturity (in years) 1.1 1.9 Unrealized gains (losses) $ 6,790 $ 3,691 is as follows: (dollars in thousands) September 30, Notional amounts $ 100,000 Weighted average floor strike rate 0.75 % Weighted average rates 0.16 % Weighted average maturity (in years) 2.5 Unrealized gains (losses) $ 1,590
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) Location of Gain or Gain (Loss) Recognized in Income on Derivative Hedged Items Location of Gain or Gain (Loss) Recognized in Income on Related Hedged Items Derivatives in Three Months Ended Interest rate contracts Interest income/(expense) $ (1,294) Fixed-rate debt Interest income/(expense) $ 1,290 Three Months Ended Interest rate contracts Interest income/(expense) $ 12 Fixed-rate debt Interest income/(expense) $ (14) Nine Months Ended Interest rate contracts Interest income/(expense) $ 8,678 Fixed-rate debt Interest income/(expense) $ (8,726) Nine Months Ended Interest rate contracts Interest income/(expense) $ 12,925 Fixed-rate debt Interest income/(expense) $ (12,914) 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) 2020 2019 2020 2019 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ (11) $ (73) $ 1,550 $ 21 Nine Months Ended Nine Months Ended 2020 2019 2020 2019 Derivatives in Location of Gain or Gain (Loss) Gain (Loss) Interest rate contracts Interest income/(expense) $ 7,546 $ 479 $ 3,651 $ 412 The effect of derivatives not designated as hedging instruments on the consolidated statements of income were as follows: Three Months Ended (dollars in thousands) 2020 2019 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ 5 $ (116) Mortgage contracts Mortgage banking revenue (2,811) 1,110 Foreign currency contracts Other income/(expense) 49 — Total $ (2,757) $ 994 Nine Months Ended 2020 2019 Derivatives Not Designated as Location of Gain or (Loss) Gain (Loss) Interest rate contracts (1) Other income/(expense) $ (582) $ (247) Mortgage contracts Mortgage banking revenue 9,244 2,951 Foreign currency contracts Other income/(expense) 25 (11) Total $ 8,687 $ 2,693 (1) Includes the valuation differences between the customer and offsetting swaps.
Schedule of Floor Spread Transactions Designated as Cash Flow Hedges	Summary information about the floor spread transactions designated as cash flow hedges at December 31, 2019 was as follows: (dollars in thousands) December 31, Notional amounts $ 210,000 Weighted average purchased floor strike rate 2.00 % Weighted average sold floor rate 1.00 % Weighted average rate 1.70 % Weighted average maturity (in years) 2.1 Unrealized gains (losses) $ 1,820

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 2,518 $ 2,518 $ — $ — Investment securities available-for-sale: U.S. Treasury 10,230 10,230 — — U.S. government-sponsored entities and agencies 491,541 — 491,541 — Mortgage-backed securities - Agency 3,382,280 — 3,382,280 — States and political subdivisions 1,426,495 — 1,426,495 — Pooled trust preferred securities 7,527 — — 7,527 Other securities 283,461 — 283,461 — Residential loans held for sale 85,091 — 85,091 — Derivative assets 154,318 — 154,318 — Financial Liabilities Derivative liabilities 18,776 — 18,776 — Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Equity securities $ 6,842 $ 6,842 $ — $ — Investment securities available-for-sale: U.S. Treasury 17,682 17,682 — — U.S. government-sponsored entities and agencies 592,984 — 592,984 — Mortgage-backed securities - Agency 3,183,861 — 3,183,861 — States and political subdivisions 1,275,643 — 1,275,603 40 Pooled trust preferred securities 8,222 — — 8,222 Other securities 306,699 31,169 275,530 — Residential loans held for sale 46,898 — 46,898 — Derivative assets 51,301 — 51,301 — Financial Liabilities Derivative liabilities 12,393 — 12,393 —
Reconciliation of All Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)	The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3): (dollars in thousands) Pooled Trust States and Three Months Ended September 30, 2020 Balance at beginning of period $ 7,185 $ — Accretion of discount 4 — Sales/payments received (16) — Increase in fair value of securities 354 — Balance at end of period $ 7,527 $ — Three Months Ended September 30, 2019 Balance at beginning of period $ 7,836 $ 40 Accretion of discount 3 — Sales/payments received (14) — Decrease in fair value of securities (130) — Balance at end of period $ 7,695 $ 40 Nine Months Ended September 30, 2020 Balance at beginning of period $ 8,222 $ 40 Accretion of discount 11 — Sales/payments received (49) (40) Decrease in fair value of securities (657) — Balance at end of period $ 7,527 $ — Nine Months Ended September 30, 2019 Balance at beginning of period $ 8,495 $ 4,108 Accretion of discount 9 — Sales/payments received (46) (35) Decrease in fair value of securities (763) — Transfers out of Level 3 — (4,033) Balance at end of period $ 7,695 $ 40
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) (4) September 30, 2020 Pooled trust preferred securities $ 7,527 Discounted cash flow Constant prepayment rate (1) 0.00% Additional asset defaults (2) 5.9% - 8.8% (6.8%) Expected asset recoveries (3) 0.0% - 18.8% (5.9%) December 31, 2019 Pooled trust preferred securities $ 8,222 Discounted cash flow Constant prepayment rate (1) 0.00% Additional asset defaults (2) 6.2% - 8.0% (6.8%) Expected asset recoveries (3) 0.0% - 19.1% (6.0%) State and political subdivisions 40 Discounted cash flow No observable inputs N/A Local municipality issuance Old National owns 100% Carried at par (1) Assuming no prepayments. (2) Each currently performing pool asset is assigned a default probability based on the banking environment, which is adjusted for specific issuer evaluation, of 0%, 50%, or 100%. (3) Each currently defaulted pool asset is assigned a recovery probability based on specific issuer evaluation of 0%, 25%, or 100%. (4) Unobservable inputs are weighted by the estimated number of defaults and current performing collateral of the instruments. 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) (3) September 30, 2020 Collateral Dependent Loans Commercial loans $ 9,790 Discounted Discount for type of property, 2% - 22% (11%) cash flow age of appraisal, and current status Commercial real estate loans 24,527 Discounted Discount for type of property, 0% - 18% (9%) cash flow age of appraisal, and current status Foreclosed Assets Residential (1) 106 Fair value of Discount for type of property, 37% collateral age of appraisal, and current status December 31, 2019 Collateral Dependent Loans Commercial loans $ 10,361 Fair value of Discount for type of property, 0% - 50% (13%) collateral age of appraisal, and current status Commercial real estate loans (2) 11,610 Fair value of Discount for type of property, 45% collateral age of appraisal, and current status Foreclosed Assets Commercial real estate (2) 21 Fair value of Discount for type of property, 43% collateral age of appraisal, and current status Residential (2) 22 Fair value of Discount for type of property, 21% collateral age of appraisal, and current status (1) There was only one foreclosed residential asset at September 30, 2020, so no range or weighted average is reported. (2) There was only one collateral dependent commercial real estate loan, one foreclosed commercial real estate asset, and one foreclosed residential asset at December 31, 2019, so no range or weighted average is reported. (3) Unobservable inputs were weighted by the relative fair value of the instruments. Fair Value Option
Assets Measured at Fair Value on a Non-Recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at September 30, 2020 Using (dollars in thousands) Carrying Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 9,790 $ — $ — $ 9,790 Commercial real estate loans 24,527 — — 24,527 Foreclosed Assets: Residential 106 — — 106 Loan servicing rights 25,597 — 25,597 — Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Collateral Dependent Loans: Commercial loans $ 10,361 $ — $ — $ 10,361 Commercial real estate loans 11,610 — — 11,610 Foreclosed Assets: Commercial real estate 21 — — 21 Residential 22 — — 22 Loan servicing rights 4,662 — 4,662 —
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, 2020 Residential loans held for sale $ 85,091 $ 5,203 $ 79,888 December 31, 2019 Residential loans held for sale $ 46,898 $ 1,529 $ 45,369 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, 2020 Residential loans held for sale $ (1,360) $ 16 $ — $ (1,344) Three Months Ended September 30, 2019 Residential loans held for sale $ 137 $ 2 $ — $ 139 Nine Months Ended September 30, 2020 Residential loans held for sale $ 3,658 $ 18 $ (2) $ 3,674 Nine Months Ended September 30, 2019 Residential loans held for sale $ 1,312 $ 12 $ — $ 1,324
Carrying Amounts and Estimated Fair Values of Financial Instruments, Not Carried at Fair Value	The carrying amounts and estimated fair values of financial instruments not carried at fair value were as follows: Fair Value Measurements at September 30, 2020 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 330,750 $ 330,750 $ — $ — Loans, net: Commercial 4,232,841 — — 4,193,640 Commercial real estate 5,622,578 — — 5,514,469 Residential real estate 2,251,375 — — 2,223,556 Consumer credit 1,654,327 — — 1,651,456 Accrued interest receivable 83,052 34 23,557 59,461 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 5,463,007 $ 5,463,007 $ — $ — Checking, NOW, savings, and money market 9,780,138 9,780,138 — — Other time deposits 1,206,658 — 1,227,050 — Brokered certificates of deposit 56,691 — 56,655 — Federal funds purchased and interbank borrowings 1,259 1,259 — — Securities sold under agreements to repurchase 399,141 399,141 — — FHLB advances 2,087,648 — 2,218,866 — Other borrowings 237,683 — 257,811 — Accrued interest payable 4,279 — 4,279 — Standby letters of credit 442 — — 442 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 12,811 Fair Value Measurements at December 31, 2019 Using (dollars in thousands) Carrying Value Quoted Prices in Significant Significant Financial Assets Cash, due from banks, money market, $ 276,337 $ 276,337 $ — $ — Loans, net: Commercial 2,867,711 — — 2,831,298 Commercial real estate 5,145,204 — — 5,130,848 Residential real estate 2,331,990 — — 2,357,341 Consumer credit 1,718,000 — — 1,676,253 Accrued interest receivable 85,123 15 28,185 56,923 Financial Liabilities Deposits: Noninterest-bearing demand deposits $ 4,042,286 $ 4,042,286 $ — $ — Checking, NOW, savings, and money market 8,828,881 8,828,881 — — Other time deposits 1,589,988 — 1,600,214 — Brokered certificates of deposit 92,242 — 92,355 — Federal funds purchased and interbank borrowings 350,414 350,414 — — Securities sold under agreements to repurchase 327,782 327,782 — — FHLB advances 1,822,847 — 1,875,089 — Other borrowings 243,685 — 254,519 — Accrued interest payable 8,272 — 8,272 — Standby letters of credit 573 — — 573 Off-Balance Sheet Financial Instruments Commitments to extend credit $ — $ — $ — $ 4,302

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue Information	The consolidated statements of income include all categories of noninterest income. The following table reflects only the categories of noninterest income that are within the scope of Topic 606: Three Months Ended Nine Months Ended (dollars in thousands) 2020 2019 2020 2019 Wealth management fees $ 9,239 $ 9,160 $ 27,547 $ 27,604 Service charges on deposit accounts 8,698 11,860 26,357 34,201 Debit card and ATM fees 5,276 5,370 15,106 16,292 Investment product fees 5,351 5,244 16,070 16,106 Other income: Merchant processing fees 852 775 2,363 2,303 Gain (loss) on other real estate owned 260 29 238 194 Safe deposit box fees 223 267 741 936 Insurance premiums and commissions 61 194 373 569 Total $ 29,960 $ 32,899 $ 88,795 $ 98,205

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - Additional Information (Detail) $ in Thousands	Jan. 01, 2020USD ($)	Sep. 30, 2020USD ($)		Sep. 30, 2020portfolio	Sep. 30, 2020segment	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)		Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of distinct loan portfolios | portfolio				7
Current expected credit losses, initial loss forecast		1 year
Current expected credit losses, reversion period, term		2 years
Increase in allowance for loan loss	$ 54,619	$ 131,388	[1]			$ 128,394	$ 54,619	[1]	$ 56,910	$ 56,292	$ 55,461
Increase in allowance for credit losses on unfunded loan	2,656	11,026				11,026	2,656
Decrease in retained earnings	(682,185)	$ (733,049)					(682,185)
Noncredit discount amount accreted into interest income	11,800
Number of loan portfolios | portfolio				4
Number of loan segments				7	7
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for loan loss	41,347					$ 0
Increase in allowance for credit losses on unfunded loan	4,549						$ 4,549
Decrease in retained earnings	31,150
Impact of ASC 326 Adoption | Acquired Loan Portoflio
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for loan loss	$ 27,100
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Recent Accounting Pronounceme_4

Recent Accounting Pronouncements - Schedule of Composition of Loans and Impact of Adoption (Detail) - USD ($) $ in Thousands	Sep. 30, 2020		Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Assets
Loans	$ 13,892,509			$ 12,117,524	$ 12,117,524
Allowance	(131,388)	[1]	$ (128,394)	(54,619)	(54,619)	[1]	$ (56,910)	$ (56,292)	$ (55,461)
Net loans	13,761,121			12,062,905	12,062,905
Net deferred tax assets				29,705
Liabilities
Allowance for credit losses on unfunded loan commitments	11,026		11,026	2,656	2,656
Shareholders' equity:
Retained earnings	733,049			682,185	682,185
Impact of ASC 326 Adoption
Assets
Loans				4,478
Allowance			0	(41,347)
Net loans				(36,869)
Net deferred tax assets				10,268
Liabilities
Allowance for credit losses on unfunded loan commitments				4,549	4,549
Shareholders' equity:
Retained earnings				(31,150)
Adjusted Balance
Assets
Loans	13,892,509			12,122,002
Allowance	(131,388)		(128,394)	(95,966)
Net loans	13,761,121			12,026,036
Net deferred tax assets				39,973
Liabilities
Allowance for credit losses on unfunded loan commitments				7,205	7,205
Shareholders' equity:
Retained earnings				651,035
Commercial
Assets
Loans	4,264,568			2,815,154	2,890,296
Allowance	(28,393)		(29,618)	(21,359)	(22,585)		(22,129)	(22,548)	(21,742)
Commercial | Impact of ASC 326 Adoption
Assets
Loans				2,679
Allowance			0	(7,150)
Commercial | Adjusted Balance
Assets
Loans	4,068,342			2,817,833
Allowance			(29,618)	(28,509)
Commercial real estate
Assets
Loans	5,701,493			4,889,253	5,166,792
Allowance	(75,912)		(71,069)	(20,535)	(21,588)		(24,254)	(23,311)	(23,470)
Commercial real estate | Impact of ASC 326 Adoption
Assets
Loans				1,637
Allowance			0	(25,548)
Commercial real estate | Adjusted Balance
Assets
Loans	5,530,912			4,890,890
Allowance			(71,069)	(46,083)
BBCC
Assets
Loans				352,681
Allowance	(6,337)		(6,332)	(2,279)
BBCC | Impact of ASC 326 Adoption
Assets
Loans				33
Allowance			0	(3,702)
BBCC | Adjusted Balance
Assets
Loans	366,807			352,714
Allowance			(6,332)	(5,981)
Residential real estate
Assets
Loans	2,265,299			2,334,289	2,334,289
Allowance	(13,924)		(14,244)	(2,299)	(2,299)		(2,363)	(2,269)	(2,277)
Residential real estate | Impact of ASC 326 Adoption
Assets
Loans				105
Allowance			0	(6,986)
Residential real estate | Adjusted Balance
Assets
Loans	2,265,299			2,334,394
Allowance			(14,244)	(9,285)
Consumer
Assets
Loans	1,661,149				1,726,147
Allowance					(8,147)		$ (8,164)	$ (8,164)	$ (7,972)
Indirect
Assets
Loans	932,759			935,584
Allowance	(4,090)		(4,453)	(5,319)
Indirect | Impact of ASC 326 Adoption
Assets
Loans				10
Allowance			0	1,669
Indirect | Adjusted Balance
Assets
Loans	932,759			935,594
Allowance			(4,453)	(3,650)
Direct
Assets
Loans	179,275			228,524
Allowance	(825)		(835)	(1,863)
Direct | Impact of ASC 326 Adoption
Assets
Loans				2
Allowance			0	1,059
Direct | Adjusted Balance
Assets
Loans	179,275			228,526
Allowance			(835)	(804)
Home equity
Assets
Loans	549,115			562,039
Allowance	(1,907)		(1,843)	(965)
Home equity | Impact of ASC 326 Adoption
Assets
Loans				12
Allowance			0	(689)
Home equity | Adjusted Balance
Assets
Loans	549,115			562,051
Allowance			$ (1,843)	(1,654)
Previously Reported
Assets
Loans	13,892,509				12,117,524
Allowance				(54,619)
Previously Reported | Commercial
Assets
Loans	4,264,568				2,890,296
Allowance				(22,585)
Previously Reported | Commercial real estate
Assets
Loans	5,701,493				5,166,792
Allowance				(21,588)
Previously Reported | Residential real estate
Assets
Loans	2,265,299				2,334,289
Allowance				(2,299)
Previously Reported | Consumer
Assets
Loans	1,661,149				$ 1,726,147
Allowance				(8,147)
Segment Portfolio Reclassifications | Commercial
Assets
Loans	(196,226)			(75,142)
Allowance				1,226
Segment Portfolio Reclassifications | Commercial real estate
Assets
Loans	(170,581)			(277,539)
Allowance				1,053
Segment Portfolio Reclassifications | BBCC
Assets
Loans	366,807			352,681
Allowance				(2,279)
Segment Portfolio Reclassifications | Residential real estate
Assets
Loans	0			0
Allowance				0
Segment Portfolio Reclassifications | Consumer
Assets
Loans	(1,661,149)			(1,726,147)
Allowance				8,147
Segment Portfolio Reclassifications | Indirect
Assets
Loans	932,759			935,584
Allowance				(5,319)
Segment Portfolio Reclassifications | Direct
Assets
Loans	179,275			228,524
Allowance				(1,863)
Segment Portfolio Reclassifications | Home equity
Assets
Loans	$ 549,115			562,039
Allowance				$ (965)
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Net Income Per Share (Detail)

Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic Net Income Per Share
Net income	$ 77,944	$ 51,705	$ 22,640	$ 69,781	$ 62,964	$ 56,276	$ 152,289	$ 189,021
Weighted average common shares outstanding (in shares)	164,773			170,746			165,748	172,807
Effect of dilutive securities:
Restricted stock (in shares)	611			761			586	672
Stock options (in shares)	35			44			36	48
Basic Net Income Per Share (in dollars per share)	$ 0.47			$ 0.41			$ 0.92	$ 1.10
Earnings Per Share, Diluted [Abstract]
Net income	$ 77,944	$ 51,705	$ 22,640	$ 69,781	$ 62,964	$ 56,276	$ 152,289	$ 189,021
Weighted average common shares outstanding (in shares)	164,773			170,746			165,748	172,807
Weighted average shares outstanding (in shares)	165,419			171,551			166,370	173,527
Diluted Net Income Per Share (in dollars per share)	$ 0.47			$ 0.41			$ 0.92	$ 1.09

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value of Available-for-Sale Investment Securities Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 5,413,977	$ 5,313,209
Unrealized Gains	197,229	93,542
Unrealized Losses	(9,672)	(21,660)
Allowance for Credit Losses for Investments	0	0
Fair Value	5,601,534	5,385,091
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,899	17,567
Unrealized Gains	331	117
Unrealized Losses	0	(2)
Allowance for Credit Losses for Investments	0	0
Fair Value	10,230	17,682
U.S. government-sponsored entities and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	488,768	596,595
Unrealized Gains	3,700	1,027
Unrealized Losses	(927)	(4,638)
Allowance for Credit Losses for Investments	0	0
Fair Value	491,541	592,984
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,280,249	3,151,550
Unrealized Gains	102,975	41,363
Unrealized Losses	(944)	(9,052)
Allowance for Credit Losses for Investments	0	0
Fair Value	3,382,280	3,183,861
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,351,122	1,232,497
Unrealized Gains	76,138	44,193
Unrealized Losses	(765)	(1,047)
Allowance for Credit Losses for Investments	0	0
Fair Value	1,426,495	1,275,643
Pooled trust preferred securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,773	13,811
Unrealized Gains	0	0
Unrealized Losses	(6,246)	(5,589)
Allowance for Credit Losses for Investments	0	0
Fair Value	7,527	8,222
Other securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	270,166	301,189
Unrealized Gains	14,085	6,842
Unrealized Losses	(790)	(1,332)
Allowance for Credit Losses for Investments	0	0
Fair Value	$ 283,461	$ 306,699

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 (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of investment securities available-for-sale	$ 39,637	$ 27,983	$ 296,075	$ 295,615
Proceeds from calls of available-for-sale debt securities	82,410	316,361	388,145	378,476
Total	122,047	344,344	684,220	674,091
Realized gains on sales of available-for-sale debt securities	4,942	340	11,082	3,443
Realized gains on calls of available-for-sale debt securities	10	86	50	89
Realized losses on sales of available-for-sale debt securities	(30)	(2)	(500)	(2,017)
Realized losses on calls of available-for-sale debt securities	(1)	0	(26)	(29)
Debt securities gains (losses), net	$ 4,921	$ 424	$ 10,606	$ 1,486

Investment Securities - Expecte

Investment Securities - Expected Maturities of Investment Securities Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-sale, Amortized Cost
Within one year	$ 479,460
One to five years	2,808,889
Five to ten years	750,252
Beyond ten years	1,375,376
Total	5,413,977	$ 5,313,209
Available-for-sale, Fair Value
Within one year	488,426
One to five years	2,909,519
Five to ten years	772,598
Beyond ten years	1,430,991
Total	$ 5,601,534	$ 5,385,091
Available-for-sale, Weighted Average Yield
Within one year	2.49%
One to five years	2.38%
Five to ten years	2.50%
Beyond ten years	3.05%
Total	2.58%

Investment Securities - Availab

Investment Securities - Available-for-Sale Investment Securities with Unrealized Losses by Aggregated Major Security Type and Length of Time in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-Sale, Less than 12 Months, Fair Value	$ 606,890	$ 1,295,822
Available-for-Sale, Less than 12 Months, Unrealized Losses	(2,701)	(11,960)
Available-for-Sale, 12 months or longer, Fair Value	31,658	314,350
Available-for-Sale, 12 months or longer, Unrealized Losses	(6,971)	(9,700)
Available-for-Sale, Fair Value	638,548	1,610,172
Available-for-Sale, Unrealized Losses	(9,672)	(21,660)
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	218,352	357,647
Available-for-Sale, Less than 12 Months, Unrealized Losses	(927)	(4,638)
Available-for-Sale, 12 months or longer, Fair Value	0	0
Available-for-Sale, 12 months or longer, Unrealized Losses	0	0
Available-for-Sale, Fair Value	218,352	357,647
Available-for-Sale, Unrealized Losses	(927)	(4,638)
U.S. Treasury
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-Sale, Less than 12 Months, Fair Value		999
Available-for-Sale, Less than 12 Months, Unrealized Losses		(2)
Available-for-Sale, 12 months or longer, Fair Value		0
Available-for-Sale, 12 months or longer, Unrealized Losses		0
Available-for-Sale, Fair Value		999
Available-for-Sale, Unrealized Losses	0	(2)
Mortgage-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-Sale, Less than 12 Months, Fair Value	300,451	786,245
Available-for-Sale, Less than 12 Months, Unrealized Losses	(834)	(6,122)
Available-for-Sale, 12 months or longer, Fair Value	3,516	212,056
Available-for-Sale, 12 months or longer, Unrealized Losses	(110)	(2,930)
Available-for-Sale, Fair Value	303,967	998,301
Available-for-Sale, Unrealized Losses	(944)	(9,052)
States and political subdivisions
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-Sale, Less than 12 Months, Fair Value	60,513	120,166
Available-for-Sale, Less than 12 Months, Unrealized Losses	(765)	(1,016)
Available-for-Sale, 12 months or longer, Fair Value	0	7,006
Available-for-Sale, 12 months or longer, Unrealized Losses	0	(31)
Available-for-Sale, Fair Value	60,513	127,172
Available-for-Sale, Unrealized Losses	(765)	(1,047)
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	7,527	8,222
Available-for-Sale, 12 months or longer, Unrealized Losses	(6,246)	(5,589)
Available-for-Sale, Fair Value	7,527	8,222
Available-for-Sale, Unrealized Losses	(6,246)	(5,589)
Other securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-Sale, Less than 12 Months, Fair Value	27,574	30,765
Available-for-Sale, Less than 12 Months, Unrealized Losses	(175)	(182)
Available-for-Sale, 12 months or longer, Fair Value	20,615	87,066
Available-for-Sale, 12 months or longer, Unrealized Losses	(615)	(1,150)
Available-for-Sale, Fair Value	48,189	117,831
Available-for-Sale, Unrealized Losses	$ (790)	$ (1,332)

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Summary of Investment Holdings [Line Items]
Accrued interest receivable on available-for-sale debt securities excluded from estimate of credit losses	$ 22,400,000		$ 22,400,000
Other-than-temporary impairment loss				$ 0
Number of securities in security portfolio | security	1,854		1,854
Number of securities in unrealized loss position | security	103		103
Total investment securities - available-for-sale	$ 5,601,534,000		$ 5,601,534,000		$ 5,385,091,000
Unrealized losses	9,672,000		9,672,000		21,660,000
Equity securities, at fair value	2,518,000		2,518,000		6,842,000
Gains on equity securities	500,000	$ 200,000	1,300,000	400,000
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	$ 95,400,000		95,400,000		91,400,000
Pooled trust preferred securities
Summary of Investment Holdings [Line Items]
Other-than-temporary impairment loss			$ 0	$ 0
Number of pooled trust preferred securities | security	2		2
Total investment securities - available-for-sale	$ 7,527,000		$ 7,527,000		8,222,000
Unrealized losses	$ 6,246,000		$ 6,246,000		$ 5,589,000

Investment Securities - Trust P

Investment Securities - Trust Preferred Securities (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)issuer	Dec. 31, 2019USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Total	$ 5,413,977	$ 5,313,209
Fair Value	5,601,534	$ 5,385,091
Pooled Trust Preferred Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Total	13,773
Fair Value	7,527
Available-for-Sale, Unrealized Gain/ (Loss)	$ (6,246)
Pooled Trust Preferred Securities | Pretsl XXVII LTD
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Pooled trust preferred securities, Class	B
Lowest Credit Rating	B
Total	$ 4,238
Fair Value	2,228
Available-for-Sale, Unrealized Gain/ (Loss)	$ (2,010)
Number of Issuers Currently Performing | issuer	32
Number of Issuers Currently Remaining | issuer	41
Actual Deferrals and Defaults as a Percent of Original Collateral	14.40%
Expected Defaults as a % of Remaining Performing Collateral	10.80%
Excess Subordination as a % of Current Performing Collateral	33.40%
Pooled Trust Preferred Securities | Trapeza Ser 13A
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Pooled trust preferred securities, Class	A2A
Lowest Credit Rating	BBB
Total	$ 9,535
Fair Value	5,299
Available-for-Sale, Unrealized Gain/ (Loss)	$ (4,236)
Number of Issuers Currently Performing | issuer	39
Number of Issuers Currently Remaining | issuer	41
Actual Deferrals and Defaults as a Percent of Original Collateral	4.50%
Expected Defaults as a % of Remaining Performing Collateral	6.40%
Excess Subordination as a % of Current Performing Collateral	52.10%
Single Issuer Trust Preferred Securities | JP Morgan Chase & Co
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Lowest Credit Rating	BBB-
Total	$ 4,806
Fair Value	4,412
Available-for-Sale, Unrealized Gain/ (Loss)	(394)
Trust Preferred Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Total	18,579
Fair Value	11,939
Available-for-Sale, Unrealized Gain/ (Loss)	$ (6,640)

Loans Held for Sale (Detail)

Loans Held for Sale (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Residential Mortgage Loans
Servicing Assets at Fair Value [Line Items]
Mortgage loans held for sale	$ 85.1	$ 46.9

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)portfolio	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)portfolio	Sep. 30, 2019USD ($)	Sep. 30, 2020segment	Sep. 30, 2020application	Sep. 30, 2020USD ($)	Sep. 30, 2020	Dec. 31, 2019USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loan portfolios | portfolio	4		4
Number of loan segments	7		7		7
Accrued interest receivable, loans							$ 59,500,000
Allowance for credit loss, net recoveries	$ 3,000,000
Loan placed on nonaccrual when past due, number of days			90 days
Loan participations							874,000,000
Loan participations sold							392,900,000
Loan participations retained							481,100,000
Troubled debt restructuring term			6 months
Nonaccrual period for loans			90 days
Minimum number of days for loan charge off to be recorded			120 days
Maximum number of days for loan charge off to be recorded			180 days
Financing receivable TDRs included with non-accrual loans							7,700,000		$ 13,800,000
Financing receivable troubled debt restructurings specific reserves							300,000		900,000
Unfunded commitments on TDRs							800,000		$ 2,300,000
Provision expense for (recoveries from) credit losses	0	$ 1,437,000	$ 39,495,000	$ 3,483,000
Charge-offs	(3,259,000)	(32,000)	$ (1,351,000)	139,000
Number of days for a loan to be considered to be in payment default			90 days
Troubled Debt Restructurings During Period
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision expense for (recoveries from) credit losses	(300,000)			700,000
Charge-offs	0			0
Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Value of small commercial loans on nonaccrual status or 90 days or more delinquent			$ 250,000
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
PPP, number of applications processed and approved (over) | application						9,700
PPP, amount of funding							$ 1,500,000,000
Provision expense for (recoveries from) credit losses	(3,289,000)	(373,000)	2,087,000	488,000
Charge-offs	(1,326,000)	(12,000)	(632,000)	89,000
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Percentage of risk-based capital								220.00%
Regulatory guideline limit								300.00%
Provision expense for (recoveries from) credit losses	4,173,000	465,000	30,696,000	(845,000)
Charge-offs	$ (1,993,000)	$ (13,000)	$ (741,000)	$ 58,000

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Schedule of Composition of Loans and Impact of Adoption (Detail) - USD ($) $ in Thousands	Sep. 30, 2020		Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 13,892,509			$ 12,117,524	$ 12,117,524
Allowance	(131,388)	[1]	$ (128,394)	(54,619)	(54,619)	[1]	$ (56,910)	$ (56,292)	$ (55,461)
Net loans	13,761,121			12,062,905	12,062,905
Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,892,509			12,122,002
Allowance	(131,388)		(128,394)	(95,966)
Net loans	13,761,121			12,026,036
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,264,568			2,815,154	2,890,296
Allowance	(28,393)		(29,618)	(21,359)	(22,585)		(22,129)	(22,548)	(21,742)
Commercial | PPP Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,479,000
Commercial | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,068,342			2,817,833
Allowance			(29,618)	(28,509)
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,701,493			4,889,253	5,166,792
Allowance	(75,912)		(71,069)	(20,535)	(21,588)		(24,254)	(23,311)	(23,470)
Commercial real estate | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,530,912			4,890,890
Allowance			(71,069)	(46,083)
BBCC
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans				352,681
Allowance	(6,337)		(6,332)	(2,279)
BBCC | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	366,807			352,714
Allowance			(6,332)	(5,981)
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,265,299			2,334,289	2,334,289
Allowance	(13,924)		(14,244)	(2,299)	(2,299)		(2,363)	(2,269)	(2,277)
Residential real estate | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,265,299			2,334,394
Allowance			(14,244)	(9,285)
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,661,149				1,726,147
Allowance					(8,147)		$ (8,164)	$ (8,164)	$ (7,972)
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	932,759			935,584
Allowance	(4,090)		(4,453)	(5,319)
Indirect | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	932,759			935,594
Allowance			(4,453)	(3,650)
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	179,275			228,524
Allowance	(825)		(835)	(1,863)
Direct | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	179,275			228,526
Allowance			(835)	(804)
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	549,115			562,039
Allowance	(1,907)		(1,843)	(965)
Home equity | Adjusted Balance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	549,115			562,051
Allowance			$ (1,843)	(1,654)
Direct Finance Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	34,400				47,200
Previously Reported
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,892,509				12,117,524
Allowance				(54,619)
Previously Reported | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,264,568				2,890,296
Allowance				(22,585)
Previously Reported | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,701,493				5,166,792
Allowance				(21,588)
Previously Reported | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,265,299				2,334,289
Allowance				(2,299)
Previously Reported | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,661,149				$ 1,726,147
Allowance				(8,147)
Segment Portfolio Reclassifications | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(196,226)			(75,142)
Allowance				1,226
Segment Portfolio Reclassifications | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(170,581)			(277,539)
Allowance				1,053
Segment Portfolio Reclassifications | BBCC
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	366,807			352,681
Allowance				(2,279)
Segment Portfolio Reclassifications | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0			0
Allowance				0
Segment Portfolio Reclassifications | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	(1,661,149)			(1,726,147)
Allowance				8,147
Segment Portfolio Reclassifications | Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	932,759			935,584
Allowance				(5,319)
Segment Portfolio Reclassifications | Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	179,275			228,524
Allowance				(1,863)
Segment Portfolio Reclassifications | Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 549,115			562,039
Allowance				$ (965)
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Schedule of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 128,394		$ 56,292	$ 54,619	[1]	$ 55,461
Charge-offs	(4,169)		(2,716)	(14,846)		(8,485)
Recoveries	7,163		1,897	10,773		6,451
Provision for Credit Losses	0		1,437	39,495		3,483
Balance at End of Period	131,388	[1]	56,910	131,388	[1]	56,910
Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	128,394
Balance at End of Period	131,388			131,388
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	29,618		22,548	22,585		21,742
Charge-offs	(128)		(420)	(5,303)		(1,184)
Recoveries	2,192		374	3,100		1,083
Provision for Credit Losses	(3,289)		(373)	2,087		488
Balance at End of Period	28,393		22,129	28,393		22,129
Commercial | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Commercial | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	29,618
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	71,069		23,311	21,588		23,470
Charge-offs	(2,709)		(191)	(5,164)		(815)
Recoveries	3,379		669	4,297		2,444
Provision for Credit Losses	4,173		465	30,696		(845)
Balance at End of Period	75,912		24,254	75,912		24,254
Commercial real estate | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Commercial real estate | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	71,069
BBCC
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	6,332
Charge-offs	(10)			(92)
Recoveries	0			122
Provision for Credit Losses	15			326
Balance at End of Period	6,337			6,337
BBCC | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
BBCC | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	6,332
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	14,244		2,269	2,299		2,277
Charge-offs	(321)		(384)	(637)		(702)
Recoveries	220		26	431		107
Provision for Credit Losses	(219)		452	4,845		681
Balance at End of Period	13,924		2,363	13,924		2,363
Residential real estate | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Residential real estate | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	14,244
Indirect
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	4,453
Charge-offs	(556)			(2,125)
Recoveries	587			1,494
Provision for Credit Losses	(394)			1,071
Balance at End of Period	4,090			4,090
Indirect | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Indirect | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	4,453
Direct
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	835
Charge-offs	(445)			(1,326)
Recoveries	187			571
Provision for Credit Losses	248			776
Balance at End of Period	825			825
Direct | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Direct | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	835
Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,843
Charge-offs	0			(199)
Recoveries	598			758
Provision for Credit Losses	(534)			(306)
Balance at End of Period	1,907			1,907
Home equity | Impact of ASC 326 Adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Home equity | Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 1,843
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period			8,164	$ 8,147		7,972
Charge-offs			(1,721)			(5,784)
Recoveries			828			2,817
Provision for Credit Losses			893			3,159
Balance at End of Period			$ 8,164			$ 8,164
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses on Unfunded Loan Commitments (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 11,026	$ 2,656
Expense (reversal of expense) for credit losses	0	3,821
Balance at end of period	$ 11,026	11,026
Impact of ASC 326 Adoption
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period		4,549
Adjusted Balance
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period		$ 7,205

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	$ 13,892,509	$ 12,117,524	$ 12,117,524
Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	13,892,509	12,122,002
Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	92,137
Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	3,542
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	14,756
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	4,264,568	2,815,154	2,890,296
Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	291,379
2016	131,352
2017	281,877
2018	226,421
2019	500,312
2020	1,955,035
Revolving Loans	510,639
Revolving to Term Loans	171,327
Total loans and leases outstanding	4,068,342	2,817,833
Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			713,092
Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			4,453,700
Commercial | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	8,425
Commercial | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	530
Commercial | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	1,048
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	5,701,493	4,889,253	5,166,792
Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	672,664
2016	579,149
2017	842,594
2018	870,481
2019	1,121,226
2020	1,056,959
Revolving Loans	29,581
Revolving to Term Loans	358,258
Total loans and leases outstanding	5,530,912	4,890,890
Commercial real estate | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	52,911
Commercial real estate | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0
Commercial real estate | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	13,698
BBCC
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding		352,681
BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	8,696
2016	28,173
2017	40,438
2018	55,658
2019	82,454
2020	73,013
Revolving Loans	53,972
Revolving to Term Loans	24,403
Total loans and leases outstanding	366,807	352,714
BBCC | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	1,716
BBCC | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	146
BBCC | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	5
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	717,654
2016	230,895
2017	227,179
2018	154,008
2019	498,860
2020	436,577
Revolving Loans	0
Revolving to Term Loans	126
Total loans and leases outstanding	2,265,299	2,334,289	2,334,289
Residential real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	2,265,299	2,334,394
Residential real estate | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	23,914		559,021
Residential real estate | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0		1,017,287
Residential real estate | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0		149,839
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	698,318
2016	228,088
2017	226,483
2018	153,172
2019	498,685
2020	436,512
Revolving Loans	0
Revolving to Term Loans	126
Total loans and leases outstanding	2,241,384		2,311,670
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	19,336
2016	2,807
2017	696
2018	836
2019	175
2020	65
Revolving Loans	0
Revolving to Term Loans	0
Total loans and leases outstanding	23,915		22,619
Indirect
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	29,130
2016	66,717
2017	115,385
2018	156,121
2019	282,837
2020	282,484
Revolving Loans	0
Revolving to Term Loans	85
Total loans and leases outstanding	932,759	935,584
Indirect | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	932,759	935,594
Indirect | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0
Indirect | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	2,619
Indirect | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0
Indirect | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	28,932
2016	66,145
2017	114,557
2018	155,493
2019	282,501
2020	282,427
Revolving Loans	0
Revolving to Term Loans	85
Total loans and leases outstanding	930,140
Indirect | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	198
2016	572
2017	828
2018	628
2019	336
2020	57
Revolving Loans	0
Revolving to Term Loans	0
Total loans and leases outstanding	2,619
Direct
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	22,648
2016	11,017
2017	20,007
2018	35,440
2019	34,228
2020	30,124
Revolving Loans	24,110
Revolving to Term Loans	1,701
Total loans and leases outstanding	179,275	228,524
Direct | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	179,275	228,526
Direct | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	1,005
Direct | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	247
Direct | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	5
Direct | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	22,077
2016	10,770
2017	19,894
2018	35,257
2019	34,149
2020	30,053
Revolving Loans	24,110
Revolving to Term Loans	1,700
Total loans and leases outstanding	178,010
Direct | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	571
2016	247
2017	113
2018	183
2019	79
2020	71
Revolving Loans	0
Revolving to Term Loans	1
Total loans and leases outstanding	1,265
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	232
2016	255
2017	979
2018	662
2019	1,120
2020	20
Revolving Loans	521,932
Revolving to Term Loans	23,915
Total loans and leases outstanding	549,115	562,039
Home equity | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	549,115	$ 562,051
Home equity | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	4,166
Home equity | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0
Home equity | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	0
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	61
2016	244
2017	936
2018	662
2019	1,091
2020	0
Revolving Loans	521,932
Revolving to Term Loans	20,022
Total loans and leases outstanding	544,948
Home equity | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	171
2016	11
2017	43
2018	0
2019	29
2020	20
Revolving Loans	0
Revolving to Term Loans	3,893
Total loans and leases outstanding	4,167
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding	1,661,149		1,726,147
Consumer | Performing | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			1,013,760
Consumer | Performing | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			147,383
Consumer | Performing | Home Equity Line of Credit
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			555,025
Consumer | Nonperforming | Auto
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			3,527
Consumer | Nonperforming | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			2,456
Consumer | Nonperforming | Home Equity Line of Credit
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			3,996
Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			2,702,605
Pass | Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	272,695
2016	124,413
2017	250,815
2018	199,031
2019	480,653
2020	1,932,380
Revolving Loans	477,815
Revolving to Term Loans	155,265
Total loans and leases outstanding	3,893,067
Pass | Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			665,512
Pass | Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			4,191,455
Pass | Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	615,539
2016	533,045
2017	717,345
2018	829,583
2019	1,073,991
2020	1,042,060
Revolving Loans	29,581
Revolving to Term Loans	334,075
Total loans and leases outstanding	5,175,219
Pass | BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	8,607
2016	27,306
2017	39,173
2018	54,175
2019	79,760
2020	70,997
Revolving Loans	51,601
Revolving to Term Loans	20,864
Total loans and leases outstanding	352,483
Criticized | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			84,676
Criticized | Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	6,083
2016	3,633
2017	8,739
2018	12,840
2019	9,420
2020	15,371
Revolving Loans	12,160
Revolving to Term Loans	3,226
Total loans and leases outstanding	71,472
Criticized | Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			34,651
Criticized | Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			115,514
Criticized | Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	22,234
2016	17,147
2017	72,598
2018	20,181
2019	39,005
2020	2,361
Revolving Loans	0
Revolving to Term Loans	19,767
Total loans and leases outstanding	193,293
Criticized | BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	0
2016	716
2017	479
2018	821
2019	1,638
2020	1,519
Revolving Loans	1,891
Revolving to Term Loans	1,030
Total loans and leases outstanding	8,094
Classified - Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			63,979
Classified - Substandard | Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	8,391
2016	2,814
2017	12,156
2018	8,659
2019	6,145
2020	6,455
Revolving Loans	18,231
Revolving to Term Loans	6,765
Total loans and leases outstanding	69,616
Classified - Substandard | Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			0
Classified - Substandard | Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			101,693
Classified - Substandard | Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	18,466
2016	7,012
2017	31,695
2018	16,511
2019	4,246
2020	12,538
Revolving Loans	0
Revolving to Term Loans	4,075
Total loans and leases outstanding	94,543
Classified - Substandard | BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	0
2016	45
2017	266
2018	40
2019	622
2020	386
Revolving Loans	341
Revolving to Term Loans	929
Total loans and leases outstanding	2,629
Classified - Nonaccrual | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			22,240
Classified - Nonaccrual | Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	3,010
2016	492
2017	9,984
2018	5,207
2019	4,094
2020	829
Revolving Loans	2,433
Revolving to Term Loans	6,071
Total loans and leases outstanding	32,120
Classified - Nonaccrual | Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			12,929
Classified - Nonaccrual | Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			38,822
Classified - Nonaccrual | Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	12,753
2016	2,308
2017	12,282
2018	4,206
2019	2,108
2020	0
Revolving Loans	0
Revolving to Term Loans	341
Total loans and leases outstanding	33,998
Classified - Nonaccrual | BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	0
2016	106
2017	520
2018	230
2019	357
2020	111
Revolving Loans	139
Revolving to Term Loans	1,580
Total loans and leases outstanding	3,043
Classified - Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			16,796
Classified - Doubtful | Commercial | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	1,200
2016	0
2017	183
2018	684
2019	0
2020	0
Revolving Loans	0
Revolving to Term Loans	0
Total loans and leases outstanding	2,067
Classified - Doubtful | Commercial | Commercial Real Estate - Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			0
Classified - Doubtful | Commercial | Commercial Real Estate - Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases outstanding			$ 6,216
Classified - Doubtful | Commercial real estate | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	3,672
2016	19,637
2017	8,674
2018	0
2019	1,876
2020	0
Revolving Loans	0
Revolving to Term Loans	0
Total loans and leases outstanding	33,859
Classified - Doubtful | BBCC | Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Prior to 2016	89
2016	0
2017	0
2018	392
2019	77
2020	0
Revolving Loans	0
Revolving to Term Loans	0
Total loans and leases outstanding	$ 558

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	$ 13,892,509	$ 12,117,524	$ 12,117,524
Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	86,715
Current	13,805,794
Total loans and leases outstanding	13,892,509	12,122,002
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	4,264,568	2,815,154	2,890,296
Commercial | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	5,449
Current	4,062,893
Total loans and leases outstanding	4,068,342	2,817,833
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	5,701,493	4,889,253	5,166,792
Commercial real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	45,000
Current	5,485,912
Total loans and leases outstanding	5,530,912	4,890,890
BBCC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding		352,681
BBCC | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	602
Current	366,205
Total loans and leases outstanding	366,807	352,714
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	2,265,299	2,334,289	$ 2,334,289
Residential real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	26,291
Current	2,239,008
Total loans and leases outstanding	2,265,299	2,334,394
Indirect
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	932,759	935,584
Indirect | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	4,910
Current	927,849
Total loans and leases outstanding	932,759	935,594
Direct
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	179,275	228,524
Direct | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,207
Current	177,068
Total loans and leases outstanding	179,275	228,526
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases outstanding	549,115	562,039
Home equity | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,256
Current	546,859
Total loans and leases outstanding	549,115	$ 562,051
30-59 Days Past Due | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	21,759
30-59 Days Past Due | Commercial | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	622
30-59 Days Past Due | Commercial real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	310
30-59 Days Past Due | BBCC | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	31
30-59 Days Past Due | Residential real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	14,508
30-59 Days Past Due | Indirect | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,729
30-59 Days Past Due | Direct | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,698
30-59 Days Past Due | Home equity | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	861
60-89 Days Past Due | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	28,811
60-89 Days Past Due | Commercial | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,594
60-89 Days Past Due | Commercial real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	21,118
60-89 Days Past Due | BBCC | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	77
60-89 Days Past Due | Residential real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,950
60-89 Days Past Due | Indirect | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	732
60-89 Days Past Due | Direct | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	203
60-89 Days Past Due | Home equity | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	137
Past Due 90 Days or More | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	36,145
Past Due 90 Days or More | Commercial | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,233
Past Due 90 Days or More | Commercial real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	23,572
Past Due 90 Days or More | BBCC | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	494
Past Due 90 Days or More | Residential real estate | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	7,833
Past Due 90 Days or More | Indirect | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	449
Past Due 90 Days or More | Direct | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	306
Past Due 90 Days or More | Home equity | Adjusted Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,258

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	$ 137,611	$ 125,546	$ 132,431
Nonaccrual With No Related Allowance	35,203
Past Due 90 Days or More and Accruing	90
Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	34,188	37,785	40,103
Nonaccrual With No Related Allowance	3,543
Past Due 90 Days or More and Accruing	38
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	67,859	51,100	58,350
Nonaccrual With No Related Allowance	31,606
Past Due 90 Days or More and Accruing	20
BBCC
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	3,601	4,048	4,530
Nonaccrual With No Related Allowance	0
Past Due 90 Days or More and Accruing	0
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	23,914	24,315	20,970
Nonaccrual With No Related Allowance	0
Past Due 90 Days or More and Accruing	0
Indirect
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	2,619	2,835	3,318
Nonaccrual With No Related Allowance	0
Past Due 90 Days or More and Accruing	30
Direct
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	1,264	1,137	1,303
Nonaccrual With No Related Allowance	54
Past Due 90 Days or More and Accruing	2
Home equity
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	4,166	$ 4,326	$ 3,857
Nonaccrual With No Related Allowance	0
Past Due 90 Days or More and Accruing	$ 0

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 13,892,509	$ 12,117,524	$ 12,117,524
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	92,137
Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	20,374
Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,797
Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,542
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	14,756
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,264,568	2,815,154	2,890,296
Commercial | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	8,425
Commercial | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	18,624
Commercial | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,560
Commercial | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	530
Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,048
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5,701,493	4,889,253	5,166,792
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	52,911
Commercial real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	85
Commercial real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,165
Commercial real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Commercial real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,698
BBCC
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		352,681
BBCC | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,716
BBCC | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,665
BBCC | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	70
BBCC | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	146
BBCC | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,265,299	2,334,289	2,334,289
Residential real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	23,914		559,021
Residential real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Residential real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Residential real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		1,017,287
Residential real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0		$ 149,839
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	932,759	935,584
Indirect | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Indirect | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Indirect | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Indirect | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,619
Indirect | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	179,275	228,524
Direct | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,005
Direct | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Direct | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2
Direct | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	247
Direct | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	5
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	549,115	$ 562,039
Home equity | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,166
Home equity | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Home equity | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Home equity | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0
Home equity | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 0

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Schedule of Activity in Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	$ 27,609	$ 43,831	$ 31,738	$ 43,710
(Charge-offs)/ Recoveries	3,259	32	1,351	(139)
(Payments)/ Disbursements	(7,343)	(4,547)	(9,564)	(24,300)
Additions	5,907	1,087	5,907	21,132
Ending Balance	29,432	40,403	29,432	40,403
Commercial
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	10,598	18,872	12,412	10,275
(Charge-offs)/ Recoveries	1,326	12	632	(89)
(Payments)/ Disbursements	(3,168)	(2,303)	(4,288)	(3,307)
Additions	0	530	0	10,232
Ending Balance	8,756	17,111	8,756	17,111
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	12,706	19,363	14,277	27,671
(Charge-offs)/ Recoveries	1,993	13	741	(58)
(Payments)/ Disbursements	(3,950)	(1,057)	(4,269)	(19,321)
Additions	5,907	0	5,907	10,027
Ending Balance	16,656	18,319	16,656	18,319
BBCC
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	147		578
(Charge-offs)/ Recoveries	(52)		(22)
(Payments)/ Disbursements	43		(418)
Additions	0		0
Ending Balance	138		138
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	3,012	3,080	3,107	3,390
(Charge-offs)/ Recoveries	0	0	0	0
(Payments)/ Disbursements	(171)	(865)	(266)	(1,175)
Additions	0	557	0	557
Ending Balance	2,841	2,772	2,841	2,772
Indirect
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	0		0
(Charge-offs)/ Recoveries	2		7
(Payments)/ Disbursements	(2)		(7)
Additions	0		0
Ending Balance	0		0
Direct
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	779		983
(Charge-offs)/ Recoveries	(11)		(9)
(Payments)/ Disbursements	(18)		(224)
Additions	0		0
Ending Balance	750		750
Home equity
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance	367		381
(Charge-offs)/ Recoveries	1		2
(Payments)/ Disbursements	(77)		(92)
Additions	0		0
Ending Balance	$ 291		$ 291
Consumer
Financing Receivable, Troubled Debt Restructuring [Roll Forward]
Beginning Balance		2,516		2,374
(Charge-offs)/ Recoveries		7		8
(Payments)/ Disbursements		(322)		(497)
Additions		0		316
Ending Balance		$ 2,201		$ 2,201

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Schedule of Loans by Class Modified as Troubled Debt Restructuring (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan
Receivables [Abstract]
Number of loans | loan	1	14
Pre-modification outstanding recorded investment	$ 5,907	$ 21,132
Post-modification outstanding recorded investment	$ 5,907	$ 21,132

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Non-TDR Loan Modifications due to COVID-19 (Details) - CARES Act Modification $ in Thousands	3 Months Ended
	Sep. 30, 2020USD ($)numberOfLoanPortfolios
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward]
June 30, 2020 Deferrals Balance	$ 1,303,544
Booked Amount End of Period Balance	$ 137,572
September 30, 2020 Number of Deferrals | numberOfLoanPortfolios	485
Commercial and commercial real estate
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward]
June 30, 2020 Deferrals Balance	$ 1,170,119
Booked Amount End of Period Balance	$ 125,603
September 30, 2020 Number of Deferrals | numberOfLoanPortfolios	105
Second deferrals between 90 and 180 days, amount	$ 8,800
Residential real estate
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward]
June 30, 2020 Deferrals Balance	78,639
Booked Amount End of Period Balance	$ 1,654
September 30, 2020 Number of Deferrals | numberOfLoanPortfolios	12
Second deferrals between 90 and 180 days, amount	$ 400
Consumer
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount [Roll Forward]
June 30, 2020 Deferrals Balance	54,786
Booked Amount End of Period Balance	$ 10,315
September 30, 2020 Number of Deferrals | numberOfLoanPortfolios	368
Second deferrals between 90 and 180 days, amount	$ 1,000

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses and Amortized Cost Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020		Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Allowance for loan losses:
Individually evaluated for impairment					$ 8,897
Collectively evaluated for impairment					45,527
Total allowance for loan losses	$ 131,388	[1]	$ 128,394	$ 54,619	54,619	[1]	$ 56,910	$ 56,292	$ 55,461
Loans and leases outstanding:
Individually evaluated for impairment					104,767
Collectively evaluated for impairment					11,978,895
Total loans and leases outstanding	13,892,509			12,117,524	12,117,524
Loans acquired with deteriorated credit quality
Allowance for loan losses:
Total allowance for loan losses					195
Loans and leases outstanding:
Total loans and leases outstanding					33,862
Commercial
Allowance for loan losses:
Individually evaluated for impairment					7,891
Collectively evaluated for impairment					14,692
Total allowance for loan losses	28,393		29,618	21,359	22,585		22,129	22,548	21,742
Loans and leases outstanding:
Individually evaluated for impairment					41,479
Collectively evaluated for impairment					2,843,536
Total loans and leases outstanding	4,264,568			2,815,154	2,890,296
Commercial | Loans acquired with deteriorated credit quality
Allowance for loan losses:
Total allowance for loan losses					2
Loans and leases outstanding:
Total loans and leases outstanding					5,281
Commercial real estate
Allowance for loan losses:
Individually evaluated for impairment					1,006
Collectively evaluated for impairment					20,582
Total allowance for loan losses	75,912		71,069	20,535	21,588		24,254	23,311	23,470
Loans and leases outstanding:
Individually evaluated for impairment					63,288
Collectively evaluated for impairment					5,084,737
Total loans and leases outstanding	5,701,493			4,889,253	5,166,792
Commercial real estate | Loans acquired with deteriorated credit quality
Allowance for loan losses:
Total allowance for loan losses					0
Loans and leases outstanding:
Total loans and leases outstanding					18,767
Residential real estate
Allowance for loan losses:
Individually evaluated for impairment					0
Collectively evaluated for impairment					2,299
Total allowance for loan losses	13,924		$ 14,244	2,299	2,299		2,363	2,269	2,277
Loans and leases outstanding:
Individually evaluated for impairment					0
Collectively evaluated for impairment					2,326,907
Total loans and leases outstanding	2,265,299			$ 2,334,289	2,334,289
Residential real estate | Loans acquired with deteriorated credit quality
Allowance for loan losses:
Total allowance for loan losses					0
Loans and leases outstanding:
Total loans and leases outstanding					7,382
Consumer
Allowance for loan losses:
Individually evaluated for impairment					0
Collectively evaluated for impairment					7,954
Total allowance for loan losses					8,147		$ 8,164	$ 8,164	$ 7,972
Loans and leases outstanding:
Individually evaluated for impairment					0
Collectively evaluated for impairment					1,723,715
Total loans and leases outstanding	$ 1,661,149				1,726,147
Consumer | Loans acquired with deteriorated credit quality
Allowance for loan losses:
Total allowance for loan losses					193
Loans and leases outstanding:
Total loans and leases outstanding					$ 2,432
[1]	Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses - Schedule of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2019
Recorded Investment
Total			$ 109,239
Unpaid Principal Balance
Total			110,353
Related Allowance			8,991
Average Recorded Investment
Total	$ 114,193	$ 121,615
Commercial
Recorded Investment
With no related allowance recorded			23,227
With an allowance recorded			18,252
Unpaid Principal Balance
With no related allowance recorded			23,665
With an allowance recorded			18,305
Related Allowance			7,891
Average Recorded Investment
With no related allowance recorded	20,147	20,593
With an allowance recorded	19,866	17,248
Commercial real estate
Recorded Investment
With an allowance recorded			12,685
Unpaid Principal Balance
With an allowance recorded			12,685
Related Allowance			1,006
Commercial real estate | Commercial Real Estate - Construction
Recorded Investment
With no related allowance recorded			12,929
Unpaid Principal Balance
With no related allowance recorded			12,929
Average Recorded Investment
With no related allowance recorded	10,964	5,445
With an allowance recorded	2,764	8,294
Commercial real estate | Commercial Real Estate - Other
Recorded Investment
With no related allowance recorded			37,674
Unpaid Principal Balance
With no related allowance recorded			38,112
Average Recorded Investment
With no related allowance recorded	34,073	39,821
With an allowance recorded	21,019	24,806
Residential real estate
Recorded Investment
With no related allowance recorded			1,774
With an allowance recorded			1,201
Unpaid Principal Balance
With no related allowance recorded			1,794
With an allowance recorded			1,201
Related Allowance			39
Average Recorded Investment
With no related allowance recorded	2,066	2,145
With an allowance recorded	924	907
Consumer
Recorded Investment
With no related allowance recorded			403
With an allowance recorded			1,094
Unpaid Principal Balance
With no related allowance recorded			568
With an allowance recorded			1,094
Related Allowance			$ 55
Average Recorded Investment
With no related allowance recorded	1,166	1,096
With an allowance recorded	$ 1,204	$ 1,260

Other Real Estate Owned - Activ

Other Real Estate Owned - Activity in Other Real Estate Owned (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Real Estate [Roll Forward]
Balance at beginning of period	$ 1,786	$ 2,819	$ 2,169	$ 3,232
Additions	368	411	572	1,084
Sales	(843)	(271)	(1,267)	(1,248)
Impairments	(63)	(18)	(226)	(127)
Balance at end of period	1,248	2,941	1,248	2,941
Repossessed personal property	$ 200	$ 500	$ 200	$ 500

Other Real Estate Owned - Addit

Other Real Estate Owned - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Regulatory Assets [Abstract]
Value of foreclosed residential real estate property	$ 0.8	$ 0.5
Value of mortgage loans in process of foreclosure	$ 2.9	$ 3.7

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 597,628	$ 617,284
Accumulated depreciation	(134,375)	(126,359)
Premises and equipment, net	463,253	490,925
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	72,451	79,569
Buildings
Property, Plant and Equipment [Line Items]
Buildings	372,746	380,925
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	108,323	112,654
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 44,108	$ 44,136

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Depreciation	$ 6,800	$ 6,800	$ 21,807	$ 19,980

Leases - Additional Information

Leases - Additional Information (Detail)	Sep. 30, 2020
Minimum
Lessee, Lease, Description [Line Items]
Operating lease term	10 years
Finance lease term	10 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 (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finance lease cost:
Total	$ 4,232	$ 4,334	$ 20,408	$ 13,148
occupancy/equipment expense
Lessee, Lease, Description [Line Items]
Operating lease cost	3,952	4,280	19,786	12,973
occupancy expense
Finance lease cost:
Amortization of right-of-use assets	311	166	733	485
Short-term lease cost	0	1	0	2
Sub-lease income	(129)	(193)	(378)	(553)
interest expense
Finance lease cost:
Interest on lease liabilities	$ 98	$ 80	$ 267	$ 241

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
Operating lease right-of-use assets	$ 77,482	$ 95,477
Operating lease liabilities	88,552	99,500
Finance Leases
Premises and equipment, net	11,662	7,170
Other borrowings	$ 12,062	$ 7,406
Weighted-Average Remaining Lease Term (in Years)
Operating leases	10 years 7 months 6 days	10 years 7 months 6 days
Finance leases	10 years 6 months	11 years 3 months 18 days
Weighted-Average Discount Rate
Operating leases	3.40%	3.45%
Finance leases	3.45%	4.43%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet	us-gaap:PropertyPlantAndEquipmentNet
Finance Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherBorrowings	us-gaap:OtherBorrowings

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 12,194	$ 13,201
Operating cash flows from finance leases	267	241
Financing cash flows from finance leases	$ 569	$ 344

Leases - Schedule of Maturity A

Leases - Schedule of Maturity Analysis of Lease Liability by Lease Classification (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
2020	$ 3,735
2021	14,344
2022	13,277
2023	9,244
2024	8,073
Thereafter	57,791
Total undiscounted lease payments	106,464
Amounts representing interest	(17,912)
Lease liability	88,552	$ 99,500
Finance Leases
2020	346
2021	1,394
2022	1,412
2023	1,438
2024	1,444
Thereafter	8,442
Total undiscounted lease payments	14,476
Amounts representing interest	(2,414)
Lease liability	$ 12,062	$ 7,406

Leases - Schedule of Maturity_2

Leases - Schedule of Maturity Analysis of Tenant Leases (Detail) $ in Thousands	Sep. 30, 2020USD ($)
Tenant Leases
2020	$ 628
2021	2,327
2022	1,878
2023	1,523
2024	1,409
Thereafter	2,520
Total undiscounted lease payments	$ 10,285

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,036,994	$ 1,036,258	$ 1,036,994	$ 1,036,258
Acquisitions and adjustments	0	736	0	736
Balance at end of period	$ 1,036,994	$ 1,036,994	$ 1,036,994	$ 1,036,994

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Line Items]
Goodwill impairment	$ 0
Impairment charges				$ 0	$ 0
Amortization of other intangible assets		$ 3,459,000	$ 4,168,000	$ 10,847,000	$ 12,965,000
Core Deposits and Other Intangible Assets | Minimum
Goodwill [Line Items]
Estimated useful lives of core deposits and customer relationships				5 years
Core Deposits and Other Intangible Assets | Maximum
Goodwill [Line Items]
Estimated useful lives of core deposits and customer relationships				15 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 129,270	$ 135,598
Accumulated Amortization and Impairment	(80,012)	(75,493)
Net Carrying Amount	49,258	60,105
Core deposit
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	112,723	119,051
Accumulated Amortization and Impairment	(66,651)	(63,020)
Net Carrying Amount	46,072	56,031
Customer trust relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,547	16,547
Accumulated Amortization and Impairment	(13,361)	(12,473)
Net Carrying Amount	$ 3,186	$ 4,074

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense for Future Years (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2020 remaining	$ 3,244
2021	11,336
2022	9,014
2023	7,053
2024	5,645
Thereafter	12,966
Net Carrying Amount	$ 49,258	$ 60,105

Loan Servicing Rights - Additio

Loan Servicing Rights - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Transfers and Servicing [Abstract]
Servicing Asset	$ 25,501	$ 25,400	$ 24,623
Principal balance of loans serviced for others	3,619,000	3,445,000
Funds held in escrow	45,200	12,700
Fair value of servicing rights	$ 25,600	$ 26,500
Fair value at discount rate	9.00%	12.00%
Fair value inputs weighted average prepayment speed	15.00%	10.00%

Loan Servicing Rights - Compone

Loan Servicing Rights - Components of Loan Servicing Rights and Valuation Allowance (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Servicing asset:
Balance at beginning of period	$ 26,288	$ 24,364	$ 25,399	$ 24,512
Additions	4,446	2,097	9,849	4,026
Amortization	(2,885)	(1,717)	(7,399)	(3,794)
Balance before valuation allowance at end of period	27,849	24,744	27,849	24,744
Valuation allowance:
Balance at beginning of period	(2,253)	(32)	(31)	(15)
(Additions)/recoveries	(95)	(89)	(2,317)	(106)
Balance at end of period	(2,348)	(121)	(2,348)	(121)
Loan servicing rights, net	$ 25,501	$ 24,623	$ 25,501	$ 24,623	$ 25,400

Qualified Affordable Housing _3

Qualified Affordable Housing Projects and Other Tax Credit Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Investment Holdings [Line Items]
Investment	$ 65,862		$ 65,862		$ 59,661
Unfunded Commitment	32,747		32,747		25,926
Amortization Expense	3,891	$ 2,004	11,246	$ 4,415
Tax Expense (Benefit) Recognized	(4,756)	(2,306)	(10,214)	(5,167)
LIHTC
Investment Holdings [Line Items]
Investment, Proportional amortization	34,434		34,434		29,735
Unfunded Commitment, Proportional amortization	8,028		8,028		3,911
Amortization Expense	776	793	2,329	2,376
Tax Expense (Benefit) Recognized	(1,015)	(992)	(3,053)	(3,076)
FHTC
Investment Holdings [Line Items]
Investment, Equity	26,083		26,083		22,403
Unfunded Commitment, Equity	22,633		22,633		17,886
Amortization Expense	816	1,113	5,959	1,113
Tax Expense (Benefit) Recognized	(1,479)	(1,244)	(4,191)	(1,244)
Renewable Energy
Investment Holdings [Line Items]
Investment, Equity	5,345		5,345		7,523
Unfunded Commitment, Equity	2,086		2,086		$ 4,129
Amortization Expense	2,299	85	2,958	913
Tax Expense (Benefit) Recognized	$ (2,262)	(70)	$ (2,970)	(847)
CReED
Investment Holdings [Line Items]
Amortization Expense		13		13
Tax Expense (Benefit) Recognized		$ 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 (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]
Securities sold under agreements to repurchase	$ 399,141,000	$ 337,551,000	$ 327,782,000
Average amount outstanding during the period	355,039,000	344,294,000
Maximum amount outstanding at any month-end during the period	$ 399,141,000	$ 367,884,000
Weighted average interest rate during period	0.27%	0.80%
Weighted average interest rate at end of period	0.12%	0.74%	0.53%

Securities Sold Under Agreeme_4

Securities Sold Under Agreements to Repurchase - Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 399,141	$ 327,782	$ 337,551
U.S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	399,141
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	399,141
Overnight and Continuous | U.S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	399,141
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
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
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
Assets Sold under Agreements to Repurchase [Line Items]
Secured borrowings and class of collateral pledged under repurchase agreements	$ 0

Securities Sold Under Agreeme_5

Securities Sold Under Agreements to Repurchase - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2020
Securities Sold under Agreements to Repurchase [Abstract]
Gross outstanding balance of repurchase agreements collateralized by securities percentage	106.00%

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances - Summary of FHLB Advances (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances [Line Items]
FHLB advances (fixed rates 0.13% to 4.96%    and variable rates 0.11% to 0.13%) maturing   October 2020 to August 2035	$ 2,075,660	$ 1,800,664
ASC 815 fair value hedge and other basis adjustments	11,988	22,183
Federal Home Loan Bank advances	$ 2,087,648	$ 1,822,847
Minimum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rates	0.13%
Variable rates	0.11%
Maximum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rates	4.96%
Variable rates	0.13%

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2020USD ($)advance	Jun. 30, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances [Line Items]
Weighted-average rates of FHLB advances	1.50%		2.19%
Modifications, amount | $	$ 300
Modifications, number of contracts | advance	2
Weighted average interest rate	0.90%	1.78%
FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Percentage of borrowings collateralized by investment securities and residential real estate loans	140.00%

Federal Home Loan Bank Advanc_5

Federal Home Loan Bank Advances - Summary of Contractual Maturities of FHLB Advances (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Federal Home Loan Banks [Abstract]
Due in 2020	$ 150,000
Due in 2021	20,000
Due in 2022	30,500
Due in 2023	160
Due in 2024	125,000
Thereafter	1,750,000
ASC 815 fair value hedge and other basis adjustments	11,988	$ 22,183
Total	$ 2,087,648	$ 1,822,847

Other Borrowings - Summary of O

Other Borrowings - Summary of Other Borrowings (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Nov. 01, 2017	Aug. 31, 2014
Debt Instrument [Line Items]
Lease liability	$ 12,062	$ 7,406
Other borrowings	237,683	243,685
Old National Bank
Debt Instrument [Line Items]
Other basis adjustments	450	517
Lease liability	12,062	7,406
Old National Bancorp
Debt Instrument [Line Items]
Other basis adjustments	$ (3,231)	(2,833)
Senior Unsecured Notes | Old National Bancorp
Debt Instrument [Line Items]
Fixed rates	4.125%			4.125%
Senior unsecured notes (fixed rate 4.125% maturing August 2024)	$ 175,000	175,000		$ 175,000
Unamortized debt issuance costs related to senior unsecured notes	(598)	(715)
Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Junior subordinated debentures (variable rates of    1.77% to 2.00%) maturing March 2035 to June 2037	$ 42,000	52,310
Subordinated Debt | Old National Bank
Debt Instrument [Line Items]
Fixed rates	5.75%		5.75%
Subordinated debentures (fixed rate 5.75%)	$ 12,000	$ 12,000
Minimum | Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Variable rates	1.77%
Maximum | Junior Subordinated Debentures | Old National Bancorp
Debt Instrument [Line Items]
Variable rates	2.00%

Other Borrowings - Contractual

Other Borrowings - Contractual Maturities of Other Borrowings (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Due in 2020	$ 250
Due in 2021	1,025
Due in 2022	1,073
Due in 2023	1,132
Due in 2024	176,170
Thereafter	61,412
Unamortized debt issuance costs and other basis adjustments	(3,379)
Total	$ 237,683	$ 243,685

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail) - USD ($) $ in Thousands	Nov. 01, 2017	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Sep. 30, 2020	Dec. 31, 2019	Aug. 31, 2014
Debt Instrument [Line Items]
Lease liability					$ 12,062	$ 7,406
Old National Bank
Debt Instrument [Line Items]
Lease liability					12,062	7,406
Junior Subordinated Debentures | Trust Preferred Securities
Debt Instrument [Line Items]
Redemption of debentures		$ 3,100	$ 3,100	$ 4,100
Debt instrument floating rate at redemption		5.62%	4.71%	5.36%
Subordinated Debentures | Anchor Bank (MN) | Subordinated Fixed-to-Floating Notes
Debt Instrument [Line Items]
Value of subordinated fixed-to-floating notes assumed	$ 12,000
Subordinated Debentures | Anchor Bank (MN) | Subordinated Fixed-to-Floating Notes | LIBOR
Debt Instrument [Line Items]
Variable rate	4.356%
Old National Bancorp | Senior Unsecured Notes
Debt Instrument [Line Items]
Senior unsecured notes					$ 175,000	$ 175,000	$ 175,000
Fixed rates					4.125%		4.125%

Other Borrowings - Summary of T

Other Borrowings - Summary of Terms of Outstanding Junior Subordinated Debentures (Detail) - Trust Preferred Securities - Junior Subordinated Debentures	9 Months Ended
	Sep. 30, 2020USD ($)
Debt Instrument [Line Items]
Issuance Amount	$ 42,000,000
St. Joseph Capital Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,000,000
Rate	2.00%
St. Joseph Capital Trust II | LIBOR
Debt Instrument [Line Items]
Variable rate	1.75%
Anchor Capital Trust III
Debt Instrument [Line Items]
Issuance Amount	$ 5,000,000
Rate	1.77%
Anchor Capital Trust III | LIBOR
Debt Instrument [Line Items]
Variable rate	1.55%
Home Federal Statutory    Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 15,000,000
Rate	1.90%
Home Federal Statutory    Trust I | LIBOR
Debt Instrument [Line Items]
Variable rate	1.65%
Monroe Bancorp Capital    Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 3,000,000
Rate	1.88%
Monroe Bancorp Capital    Trust I | LIBOR
Debt Instrument [Line Items]
Variable rate	1.60%
Tower Capital Trust 3
Debt Instrument [Line Items]
Issuance Amount	$ 9,000,000
Rate	1.93%
Tower Capital Trust 3 | LIBOR
Debt Instrument [Line Items]
Variable rate	1.69%
Monroe Bancorp Statutory    Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,000,000
Rate	1.85%
Monroe Bancorp Statutory    Trust II | LIBOR
Debt Instrument [Line Items]
Variable rate	1.60%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,864,255	$ 2,803,139	$ 2,852,453	$ 2,689,570
Other comprehensive income (loss) before reclassifications	5,226	15,818	104,028	103,094
Amounts reclassified from AOCI to income	(4,985)	659	(10,951)	370
Ending balance	2,921,149	2,832,530	2,921,149	2,832,530
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	149,043	42,037	56,207	(44,950)
Ending balance	149,284	58,514	149,284	58,514
Unrealized Gains and Losses on Available- for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	144,811	48,701	56,131	(37,348)
Other comprehensive income (loss) before reclassifications	5,234	15,876	98,336	102,737
Amounts reclassified from AOCI to income	(3,837)	(335)	(8,259)	(1,147)
Ending balance	146,208	64,242	146,208	64,242
Unrealized Gains and Losses on Held-to- Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	(7,729)	0	(8,515)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI to income	0	992	0	1,778
Ending balance	0	(6,737)	0	(6,737)
Gains and Losses on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	4,355	1,220	240	1,099
Other comprehensive income (loss) before reclassifications	(8)	(58)	5,692	357
Amounts reclassified from AOCI to income	(1,169)	(13)	(2,754)	(307)
Ending balance	3,178	1,149	3,178	1,149
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(123)	(155)	(164)	(186)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI to income	21	15	62	46
Ending balance	$ (102)	$ (140)	$ (102)	$ (140)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	$ 4,921			$ 424			$ 10,606	$ 1,486
Income tax (expense) benefit	(12,154)			(13,254)			(24,854)	(40,717)
Interest income (expense)	145,573			153,096			435,015	455,374
Salaries and employee benefits	(28)			(20)			(82)	(61)
Net income	77,944	$ 51,705	$ 22,640	69,781	$ 62,964	$ 56,276	152,289	189,021
Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	4,985			(659)			10,951	(370)
Amount Reclassified from AOCI | Unrealized Gains and Losses on Available- for-Sale Debt Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt securities gains (losses), net	4,921			424			10,606	1,486
Income tax (expense) benefit	(1,084)			(89)			(2,347)	(339)
Net income	3,837			335			8,259	1,147
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	0			392			0	627
Interest income (expense)	0			(1,384)			0	(2,405)
Net income	0			(992)			0	(1,778)
Amount Reclassified from AOCI | Gains and Losses on Cash Flow Hedges | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(381)			(8)			(897)	(105)
Interest income (expense)	1,550			21			3,651	412
Net income	1,169			13			2,754	307
Amount Reclassified from AOCI | Defined Benefit Pension Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	7			5			20	15
Salaries and employee benefits	(28)			(20)			(82)	(61)
Net income	$ (21)			$ (15)			$ (62)	$ (46)

Share-Based Compensation (Detai

Share-Based Compensation (Detail) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares available for issuance (in shares)	2,900		2,900
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted during period (in shares)			360
Share-based compensation awards, vesting period			36 months
Unrecognized compensation expense	$ 6,600,000		$ 6,600,000
Expected weighted-average period for cost recognition			2 years 3 months 18 days
Share-based compensation expense	700,000	$ 700,000	$ 1,900,000	$ 1,900,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted during period (in shares)			210
Share-based compensation awards, vesting period			36 months
Unrecognized compensation expense	4,400,000		$ 4,400,000
Expected weighted-average period for cost recognition			1 year 10 months 24 days
Share-based compensation expense	$ 600,000	$ 1,000,000	$ 2,600,000	$ 2,600,000
Stock Options | Old National Bancorp
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental expense associated with conversion of stock appreciation rights			$ 0
Stock Appreciation Rights (SARs) | Old National Bancorp
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)	49		49

Income Taxes - Summary of Diffe

Income Taxes - Summary of Differences in Taxes from Continuing Operations Computed at Statutory Rate (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Statutory rate			21.00%
Provision at statutory rate	$ 18,920	$ 17,437	$ 37,200	$ 48,245
Tax-exempt interest	(2,682)	(2,511)	(7,985)	(7,645)
Section 291/265 interest disallowance	36	113	153	346
Company-owned life insurance income	(386)	(568)	(1,657)	(1,806)
Tax-exempt income	(3,032)	(2,966)	(9,489)	(9,105)
State income taxes	656	1,496	2,367	5,053
Interim period effective rate adjustment	(2,501)	(1,598)	840	(557)
Tax credit investments - federal	(2,575)	(2,443)	(6,296)	(3,577)
Other, net	686	1,328	232	658
Income tax expense	$ 12,154	$ 13,254	$ 24,854	$ 40,717
Effective tax rate	13.50%	16.00%	14.00%	17.70%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Expected decrease in unrecognized tax benefits	$ 0
Bad debt reserves, created for tax purposes	52,800,000
Unrecognized deferred income tax liability	13,000,000
Valuation allowance recorded	0	$ 0
Federal
Income Taxes [Line Items]
Operating loss carryforwards	52,400,000	78,500,000
State
Income Taxes [Line Items]
Operating loss carryforwards	132,200,000	$ 148,400,000
AnchorBank WI
Income Taxes [Line Items]
Bad debt reserves, created for tax purposes	50,900,000
Lafayette Savings Bank
Income Taxes [Line Items]
Bad debt reserves, created for tax purposes	$ 1,900,000

Income Taxes - Schedule of Sign

Income Taxes - Schedule of Significant Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deferred Tax Assets
Allowance for loan losses, net of recapture	$ 34,677	$ 14,179
Benefit plan accruals	15,636	19,673
Alternative minimum tax credit	0	1,272
Net operating loss carryforwards	18,982	25,336
Deferred gain on securities	2,272	3,754
Acquired loans	12,542	16,784
Operating lease liabilities	24,512	26,503
Tax credit investments and other partnerships	1,264	1,765
Other real estate owned	27	141
Other, net	580	591
Total deferred tax assets	110,492	109,998
Deferred Tax Liabilities
Purchase accounting	(18,038)	(17,564)
Loan servicing rights	(6,213)	(6,289)
Premises and equipment	(14,267)	(12,167)
Prepaid expenses	(956)	(973)
Operating lease right-of-use assets	(21,718)	(25,448)
Unrealized gains on available-for-sale investment securities	(41,349)	(15,751)
Unrealized gains on hedges	(1,035)	(78)
Other, net	(2,767)	(2,023)
Total deferred tax liabilities	(106,343)	(80,293)
Net deferred tax assets	$ 4,149	$ 29,705

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Notional amounts	$ 1,106,000,000		$ 1,106,000,000		$ 665,500,000
Percentage of periodic changes in fair value qualifies for hedge accounting treatment	100.00%		100.00%
Reclassified interest income (expense)	$ 145,573,000	$ 153,096,000	$ 435,015,000	$ 455,374,000
Amount Reclassified from AOCI | Interest Income
Derivative [Line Items]
Reclassified interest income (expense)			7,100,000
Amount Reclassified from AOCI | interest expense
Derivative [Line Items]
Reclassified interest income (expense)			1,700,000
Fixed Interest Swap
Derivative [Line Items]
Notional amounts	380,500,000		380,500,000		130,500,000
Variable Interest Rate Swap
Derivative [Line Items]
Notional amounts	325,000,000		325,000,000		25,000,000
Variable Interest Rate Collars and Floors
Derivative [Line Items]
Notional amounts	400,000,000		400,000,000
Variable Interest Rate Collar
Derivative [Line Items]
Notional amounts					510,000,000
Interest Rate Lock Commitments
Derivative [Line Items]
Notional amounts	233,300,000		233,300,000		65,700,000
Forward Commitments
Derivative [Line Items]
Notional amounts	291,600,000		291,600,000		101,600,000
Customer Derivative Instrument
Derivative [Line Items]
Notional amounts	1,792,000,000		1,792,000,000		1,298,000,000
Offsetting Counter Party Derivative Instrument
Derivative [Line Items]
Notional amounts	1,792,000,000		1,792,000,000		1,298,000,000
Foreign Currency Forward Contract | Foreign currency contracts
Derivative [Line Items]
Notional amounts	$ 9,300,000		$ 9,300,000		$ 8,200,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Total derivative assets	$ 154,318,000	$ 51,301,000
Total derivative liabilities	18,776,000	12,393,000
Fair values of counterparty interest rate swaps	0
Interest rate contracts net adjustment	109,200,000	31,600,000
Derivatives designated as hedging instruments
Derivative [Line Items]
Total derivative assets	18,758,000	7,157,000
Total derivative liabilities	2,367,000	1,046,000
Derivatives designated as hedging instruments | Interest rate contracts | Other assets
Derivative [Line Items]
Total derivative assets	18,758,000	7,157,000
Derivatives designated as hedging instruments | Interest rate contracts | Other liabilities
Derivative [Line Items]
Total derivative liabilities	2,367,000	1,046,000
Derivatives not designated as hedging instruments
Derivative [Line Items]
Total derivative assets	135,560,000	44,144,000
Total derivative liabilities	16,409,000	11,347,000
Derivatives not designated as hedging instruments | Interest rate contracts | Other assets
Derivative [Line Items]
Total derivative assets	124,712,000	42,224,000
Derivatives not designated as hedging instruments | Interest rate contracts | Other liabilities
Derivative [Line Items]
Total derivative liabilities	16,282,000	10,883,000
Derivatives not designated as hedging instruments | Mortgage contracts | Other assets
Derivative [Line Items]
Total derivative assets	10,592,000	1,702,000
Derivatives not designated as hedging instruments | Mortgage contracts | Other liabilities
Derivative [Line Items]
Total derivative liabilities	0	354,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Other assets
Derivative [Line Items]
Total derivative assets	256,000	218,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Other liabilities
Derivative [Line Items]
Total derivative liabilities	$ 127,000	$ 110,000

Derivative Financial Instrume_5

Derivative Financial Instruments - Summary of Derivatives Designated as Hedges (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts	$ 1,106,000,000	$ 665,500,000
Fixed Interest Swap | Derivatives designated as hedging instruments | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts	$ 380,500,000	$ 130,500,000
Weighted average pay rates	0.20%	1.82%
Weighted average receive rates	1.33%	2.20%
Weighted average maturity (in years)	2 years 4 months 24 days	2 years 9 months 18 days
Fair value of swaps	$ 10,233,000	$ 1,555,000
Variable Interest Rate Swap | Derivatives designated as hedging instruments | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts	$ 325,000,000	$ 25,000,000
Weighted average maturity (in years)	3 years 9 months 18 days	2 years 1 month 6 days
Weighted average pay rates	0.74%	3.52%
Weighted average receive rates	0.34%	1.93%
Unrealized gains (losses)	$ (2,222,000)	$ (954,000)
Variable Interest Rate Collar | Derivatives designated as hedging instruments | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts	$ 300,000,000	$ 300,000,000
Weighted average cap rates	3.21%	3.21%
Weighted average floor rates	2.21%	2.21%
Weighted average rates	0.16%	1.70%
Weighted average maturity (in years)	1 year 1 month 6 days	1 year 10 months 24 days
Unrealized gains (losses)	$ 6,790,000	$ 3,691,000
Interest Rate Floor | Derivatives designated as hedging instruments | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts	$ 100,000,000	$ 210,000,000
Weighted average floor rates	0.75%	2.00%
Weighted average sold floor rate		1.00%
Weighted average rates	0.16%	1.70%
Weighted average maturity (in years)	2 years 6 months	2 years 1 month 6 days
Unrealized gains (losses)	$ 1,590,000	$ 1,820,000

Derivative Financial Instrume_6

Derivative Financial Instruments - Schedule of Effect of Derivative Instruments on the Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	$ (11)	$ (73)	$ 7,546	$ 479
Gain (Loss) Reclassified from AOCI into Income	1,550	21	3,651	412
Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	(2,757)	994	8,687	2,693
Interest rate contracts | Interest income/(expense)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	(11)	(73)	7,546	479
Gain (Loss) Reclassified from AOCI into Income	1,550	21	3,651	412
Interest rate contracts | Interest income/(expense) | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	(1,294)	12	8,678	12,925
Interest rate contracts | Other income/(expense) | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	5	(116)	(582)	(247)
Fixed-rate debt | Interest income/(expense) | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Related Hedged Items	1,290	(14)	(8,726)	(12,914)
Mortgage contracts | Mortgage banking revenue | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	(2,811)	1,110	9,244	2,951
Foreign currency contracts | Other income/(expense) | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ 49	$ 0	$ 25	$ (11)

Commitments and Contingencies (

Commitments and Contingencies (Detail)	9 Months Ended
	Sep. 30, 2020USD ($)shares	Jun. 30, 2020USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)
Loss Contingencies [Line Items]
Loan commitments	$ 3,511,000,000			$ 2,779,000,000
Standby letters of credit	88,500,000			87,800,000
Fixed rate loan commitment	3,238,000,000
Floating rate loan commitment	$ 272,100,000
Loan commitments floating rate, minimum	0.00%
Loan commitments floating rate, maximum	13.00%
Allowance for unfunded loan commitments	$ 11,000,000			2,700,000
Increase in allowance for credit losses on unfunded loan	11,026,000	$ 11,026,000	$ 2,656,000	2,656,000
Extended credit	8,100,000			8,700,000
Credit extensions with collateral	$ 7,500,000			7,700,000
Impact of ASC 326 Adoption
Loss Contingencies [Line Items]
Increase in allowance for credit losses on unfunded loan			$ 4,549,000	$ 4,549,000
Class B Restricted Shares | Visa
Loss Contingencies [Line Items]
Restricted stock conversion ratio	1.6228
Investment owned, balance, shares | shares	65,466
Investment owned, at cost	$ 0

Financial Guarantees (Detail)

Financial Guarantees (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Financial Guarantees [Line Items]
Term of standby letters of credit, years	1 year
Notional amount of standby letters of credit	$ 88,500,000	$ 87,800,000
Carrying value of letters of credit	400,000	600,000
Notional amounts	1,106,000,000	$ 665,500,000
Interest Rate Swap
Financial Guarantees [Line Items]
Notional amounts	$ 47,600,000

Segment Information (Detail)

Segment Information (Detail)	9 Months Ended
	Sep. 30, 2020segment
Community Banking Segment
Segment Reporting Information [Line Items]
Number of reportable operating segment	1

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities, at fair value	$ 2,518	$ 6,842
Total investment securities - available-for-sale	5,601,534	5,385,091
Derivative assets	154,318	51,301
Derivative liabilities	18,776	12,393
U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	10,230	17,682
U.S. government-sponsored entities and agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	491,541	592,984
Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	3,382,280	3,183,861
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	1,426,495	1,275,643
Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	7,527	8,222
Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	283,461	306,699
Fair Value on Recurring Basis | Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities, at fair value	2,518	6,842
Residential loans held for sale	85,091	46,898
Derivative assets	154,318	51,301
Derivative liabilities	18,776	12,393
Fair Value on Recurring Basis | Carrying Value | U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	10,230	17,682
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]
Total investment securities - available-for-sale	491,541	592,984
Fair Value on Recurring Basis | Carrying Value | Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	3,382,280	3,183,861
Fair Value on Recurring Basis | Carrying Value | States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	1,426,495	1,275,643
Fair Value on Recurring Basis | Carrying Value | Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	7,527	8,222
Fair Value on Recurring Basis | Carrying Value | Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities - available-for-sale	283,461	306,699
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, at fair value	2,518	6,842
Residential 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, at fair value	0	0
Residential loans held for sale	85,091	46,898
Derivative assets	154,318	51,301
Derivative liabilities	18,776	12,393
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, at fair value	0	0
Residential 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]
Total investment securities - available-for-sale	10,230	17,682
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]
Total 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]
Total 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]
Total 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]
Total investment securities - available-for-sale	491,541	592,984
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]
Total 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]
Total 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]
Total investment securities - available-for-sale	3,382,280	3,183,861
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]
Total 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]
Total 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]
Total investment securities - available-for-sale	1,426,495	1,275,603
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]
Total investment securities - available-for-sale	0	40
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]
Total 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]
Total investment securities - available-for-sale	0	0
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]
Total investment securities - available-for-sale	7,527	8,222
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]
Total investment securities - available-for-sale	0	31,169
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]
Total investment securities - available-for-sale	283,461	275,530
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]
Total investment securities - available-for-sale	$ 0	$ 0

Fair Value - Reconciliation of

Fair Value - Reconciliation of All Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Transfers out of Level 3				$ (4,000)
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 7,185	$ 7,836	$ 8,222	8,495
Accretion of discount	4	3	11	9
Sales/payments received	(16)	(14)	(49)	(46)
Increase (decrease) in fair value of securities	354	(130)	(657)	(763)
Transfers out of Level 3				0
Balance at end of period	7,527	7,695	7,527	7,695
Significant Unobservable Inputs (Level 3) | States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	40	40	4,108
Accretion of discount	0	0	0	0
Sales/payments received	0	0	(40)	(35)
Increase (decrease) in fair value of securities	0	0	0	0
Transfers out of Level 3				(4,033)
Balance at end of period	$ 0	$ 40	$ 0	$ 40

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Provision expense for (recoveries from) credit losses	$ 0	$ 1,437	$ 39,495	$ 3,483
Net carrying amount other real estate owned and other repossessed property	106		106			$ 43
Other real estate owned property write-downs	63	18	161	39
Valuation allowance for loan servicing rights with impairments	2,348	121	2,348	121	$ 2,253	31	$ 32	$ 15
Valuation allowance for loan servicing rights with impairments, impairments during period	95	89	$ 2,317	106
Past due period of mortgage loans held for sale, days			90 days
Interest income for residential loans held for sale	600	400	$ 1,500	900
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3				4,000
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	39,000		39,000			30,900
Valuation allowance	4,700		4,700			$ 8,900
Provision expense for (recoveries from) credit losses	$ (5,000)	$ 300	$ 1,500	$ 2,600

Fair Value - Quantitative Infor

Fair Value - Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurements (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 5,601,534	$ 5,385,091
Pooled trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of adjusted specific issuer evaluation defaults	100.00%
Percentage of adjusted specific issuer evaluation recoveries	100.00%
Pooled trust preferred securities | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of adjusted specific issuer evaluation defaults	0.00%
Percentage of adjusted specific issuer evaluation recoveries	0.00%
Pooled trust preferred securities | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of adjusted specific issuer evaluation defaults	50.00%
Percentage of adjusted specific issuer evaluation recoveries	25.00%
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 7,527	$ 8,222
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Constant Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0	0
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Minimum | Additional Asset Defaults
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.059	0.062
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Minimum | Expected Asset Recoveries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0	0
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Maximum | Additional Asset Defaults
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.088	0.080
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Maximum | Expected Asset Recoveries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.188	0.191
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Weighted Average | Additional Asset Defaults
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.068	0.068
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Weighted Average | Expected Asset Recoveries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.059	0.060
Significant Unobservable Inputs (Level 3) | States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 40
Significant Unobservable Inputs (Level 3) | States and political subdivisions | Measurement Input, Ownership Percentage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input		1
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 9,790	$ 10,361
Number of loans | loan		1
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 24,527	$ 11,610
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | 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		0.45
Significant Unobservable Inputs (Level 3) | 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	0.02	0
Significant Unobservable Inputs (Level 3) | 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
Significant Unobservable Inputs (Level 3) | 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	0.22	0.50
Significant Unobservable Inputs (Level 3) | 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	0.18
Significant Unobservable Inputs (Level 3) | 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	0.11	0.13
Significant Unobservable Inputs (Level 3) | 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	0.09
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 21
Number of loans | loan		1
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 106	$ 22
Number of loans | loan	1	1
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | 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		0.43
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Discount for Type of Property, Age of Appraisal, and Current Status | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input		0.21
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Minimum | Discount for Type of Property, Age of Appraisal, and Current Status | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	0.37

Fair Value - Assets Measured at

Fair Value - Assets Measured at Fair Value on a Non-Recurring Basis (Detail) - Fair Value on Non-recurring Basis - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Commercial Real Estate Foreclosed Assets | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value		$ 21
Commercial Real Estate 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 Real Estate 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 Real Estate 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		21
Residential Foreclosed Assets | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 106	22
Residential 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	0
Residential 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	0
Residential 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	106	22
Loan servicing rights | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	25,597	4,662
Loan servicing rights | 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
Loan servicing rights | 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	25,597	4,662
Loan servicing rights | 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	0	0
Commercial | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	9,790	10,361
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	9,790	10,361
Commercial real estate | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	24,527	11,610
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	$ 24,527	$ 11,610

Fair Value - Schedule of Differ

Fair Value - Schedule of Difference between the Aggregate Fair Value and the Aggregate Remaining Principal Balance (Detail) - Residential loans held for sale - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 85,091	$ 46,898
Difference	5,203	1,529
Contractual Principal	$ 79,888	$ 45,369

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 (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Trading Securities and Other Trading Assets [Line Items]
Interest income (expense)	$ 145,573	$ 153,096	$ 435,015	$ 455,374
Interest (Expense)	(14,513)	(32,757)	(55,044)	(98,460)
Residential loans held for sale
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other Gains and (Losses)	(1,360)	137	3,658	1,312
Interest income (expense)	16	2	18	12
Interest (Expense)	0	0	(2)	0
Total Changes in Fair Values Included in Current Period Earnings	$ (1,344)	$ 139	$ 3,674	$ 1,324

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments, Not Carried at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, due from banks, money market,    and other interest-earning investments	$ 330,750		$ 276,337
Net loans	13,761,121	$ 12,062,905	12,062,905
Accrued interest receivable	83,052		85,123
Noninterest-bearing demand deposits	5,463,007		4,042,286
Other time deposits	1,206,658		1,589,988
Brokered certificates of deposit	56,691		92,242
Federal funds purchased and interbank borrowings	1,259		350,414
Securities sold under agreements to repurchase	399,141		327,782	$ 337,551
Federal Home Loan Bank advances	2,087,648		1,822,847
Other borrowings	237,683		243,685
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	330,750		276,337
Accrued interest receivable	83,052		85,123
Noninterest-bearing demand deposits	5,463,007		4,042,286
Checking, NOW, savings, and money market    interest-bearing deposits	9,780,138		8,828,881
Other time deposits	1,206,658		1,589,988
Brokered certificates of deposit	56,691		92,242
Federal funds purchased and interbank borrowings	1,259		350,414
Securities sold under agreements to repurchase	399,141		327,782
Federal Home Loan Bank advances	2,087,648		1,822,847
Other borrowings	237,683		243,685
Accrued interest payable	4,279		8,272
Standby letters of credit	442		573
Commitments to extend credit	0		0
Carrying Value | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	4,232,841		2,867,711
Carrying Value | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	5,622,578		5,145,204
Carrying Value | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	2,251,375		2,331,990
Carrying Value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	1,654,327		1,718,000
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	330,750		276,337
Accrued interest receivable	34		15
Noninterest-bearing demand deposits	5,463,007		4,042,286
Checking, NOW, savings, and money market    interest-bearing deposits	9,780,138		8,828,881
Other time deposits	0		0
Brokered certificates of deposit	0		0
Federal funds purchased and interbank borrowings	1,259		350,414
Securities sold under agreements to repurchase	399,141		327,782
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) | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	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]
Net loans	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]
Net loans	0		0
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	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	23,557		28,185
Noninterest-bearing demand deposits	0		0
Checking, NOW, savings, and money market    interest-bearing deposits	0		0
Other time deposits	1,227,050		1,600,214
Brokered certificates of deposit	56,655		92,355
Federal funds purchased and interbank borrowings	0		0
Securities sold under agreements to repurchase	0		0
Federal Home Loan Bank advances	2,218,866		1,875,089
Other borrowings	257,811		254,519
Accrued interest payable	4,279		8,272
Standby letters of credit	0		0
Commitments to extend credit	0		0
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]
Net loans	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]
Net loans	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]
Net loans	0		0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	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	59,461		56,923
Noninterest-bearing demand deposits	0		0
Checking, NOW, savings, and money market    interest-bearing deposits	0		0
Other time deposits	0		0
Brokered certificates of deposit	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	442		573
Commitments to extend credit	12,811		4,302
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	4,193,640		2,831,298
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]
Net loans	5,514,469		5,130,848
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]
Net loans	2,223,556		2,357,341
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	$ 1,651,456		$ 1,676,253

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	$ 29,960	$ 32,899	$ 88,795	$ 98,205
Wealth management fees
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	9,239	9,160	27,547	27,604
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	8,698	11,860	26,357	34,201
Debit card and ATM fees
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	5,276	5,370	15,106	16,292
Investment product fees
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	5,351	5,244	16,070	16,106
Merchant processing fees
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	852	775	2,363	2,303
Gain (loss) on other real estate owned
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	260	29	238	194
Safe deposit box fees
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	223	267	741	936
Insurance premiums and commissions
Disaggregation of Revenue [Line Items]
Noninterest income within scope of Topic 606	$ 61	$ 194	$ 373	$ 569