1st Source (SRCE) 10-K 18 Feb 25 2024 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 14, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	0-6233
Entity Registrant Name	1st Source Corporation
Entity Incorporation, State or Country Code	IN
Entity Tax Identification Number	35-1068133
Entity Address, Address Line One	100 North Michigan Street
Entity Address, City or Town	South Bend,
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46601
City Area Code	574
Local Phone Number	235-2000
Title of 12(b) Security	Common Stock — without par value
Trading Symbol	SRCE
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 1,020,669,837
Entity Common Stock, Shares Outstanding		24,553,443
Documents Incorporated by Reference	Portions of the 2025 Proxy Statement for the 2025 annual meeting of shareholders to be held April 24, 2025, are incorporated by reference into Part III.
Entity Central Index Key	0000034782
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Audit Information [Abstract]
Auditor Name	Forvis Mazars, LLP
Auditor Location	Fort Wayne, Indiana
Auditor Firm ID	686

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 76,837	$ 77,474
Federal funds sold and interest bearing deposits with other banks	47,989	52,194
Investment securities available-for-sale (amortized cost of $1,650,684 and $1,762,357 at December 31, 2024 and 2023, respectively)	1,536,299	1,622,600
Other investments	23,855	25,075
Mortgages held for sale	2,569	1,442
Loans and leases, net of unearned discount:
Total loans and leases	6,854,808	6,518,505
Allowance for loan and lease losses	155,540	147,552
Net loans and leases	6,699,268	6,370,953
Equipment owned under operating leases, net	11,483	20,366
Premises and equipment, net	53,456	46,159
Goodwill and intangible assets	83,897	83,916
Accrued income and other assets	396,285	427,779
Total assets	8,931,938	8,727,958
Deposits:
Noninterest-bearing demand	1,639,101	1,655,728
Interest-bearing demand	2,544,839	2,430,833
Savings	1,256,370	1,213,334
Time	1,789,725	1,738,686
Total interest-bearing deposits	5,590,934	5,382,853
Total deposits	7,230,035	7,038,581
Short-term borrowings:
Federal funds purchased and securities sold under agreements to repurchase	72,346	55,809
Other short-term borrowings	176,852	256,550
Total short-term borrowings	249,198	312,359
Long-term debt and mandatorily redeemable securities	39,156	47,911
Subordinated notes	58,764	58,764
Accrued expenses and other liabilities	173,279	202,080
Total liabilities	7,750,432	7,659,695
SHAREHOLDERS’ EQUITY
Preferred stock; no par value Authorized 10,000,000 shares; none issued or outstanding	0	0
Common stock; no par value Authorized 40,000,000 shares; issued 28,205,674 shares at December 31, 2024 and 2023	436,538	436,538
Retained earnings	890,937	789,842
Cost of common stock in treasury (3,685,512 shares at December 31, 2024 and 3,771,070 shares at December 31, 2023)	(129,175)	(130,489)
Accumulated other comprehensive loss	(87,232)	(106,323)
Total shareholders’ equity	1,111,068	989,568
Noncontrolling interests	70,438	78,695
Total equity	1,181,506	1,068,263
Total liabilities and equity	8,931,938	8,727,958
Commercial and agricultural
Loans and leases, net of unearned discount:
Total loans and leases	772,974	766,223
Allowance for loan and lease losses	21,316	17,385
Renewable energy
Loans and leases, net of unearned discount:
Total loans and leases	487,266	399,708
Allowance for loan and lease losses	8,562	6,610
Auto and light truck
Loans and leases, net of unearned discount:
Total loans and leases	948,435	966,912
Allowance for loan and lease losses	18,437	16,858
Medium and heavy duty truck
Loans and leases, net of unearned discount:
Total loans and leases	289,623	311,947
Allowance for loan and lease losses	7,292	8,965
Aircraft
Loans and leases, net of unearned discount:
Total loans and leases	1,123,797	1,078,172
Allowance for loan and lease losses	36,663	37,653
Construction equipment
Loans and leases, net of unearned discount:
Total loans and leases	1,203,912	1,084,752
Allowance for loan and lease losses	28,258	26,510
Commercial real estate
Loans and leases, net of unearned discount:
Total loans and leases	1,215,265	1,129,861
Allowance for loan and lease losses	24,821	23,690
Residential real estate and home equity
Loans and leases, net of unearned discount:
Total loans and leases	680,071	637,973
Allowance for loan and lease losses	7,976	7,698
Consumer
Loans and leases, net of unearned discount:
Total loans and leases	133,465	142,957
Allowance for loan and lease losses	$ 2,215	$ 2,183

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Debt securities, available-for-sale, amortized cost	$ 1,650,684	$ 1,762,357
Preferred Stock, par value per share (in dollars per share)	$ 0	$ 0
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Common Stock, par value per share (in dollars per share)	$ 0	$ 0
Common stock, authorized shares (in shares)	40,000,000	40,000,000
Common stock, issued shares (in shares)	28,205,674	28,205,674
Treasury Stock, common (in shares)	3,685,512	3,771,070

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income:
Loans and leases	$ 451,329	$ 387,298	$ 263,894
Investment securities, taxable	25,720	24,501	26,294
Investment securities, tax-exempt	1,043	1,445	1,049
Other	5,925	3,663	2,579
Total interest income	484,017	416,907	293,816
Interest expense:
Deposits	166,842	123,162	25,231
Short-term borrowings	8,976	7,032	1,497
Subordinated notes	4,217	4,174	3,550
Long-term debt and mandatorily redeemable securities	3,165	3,892	69
Total interest expense	183,200	138,260	30,347
Net interest income	300,817	278,647	263,469
Provision for credit losses	12,466	5,866	13,245
Net interest income after provision for credit losses	288,351	272,781	250,224
Noninterest income:
Mortgage banking	4,210	3,471	4,122
Insurance commissions	6,730	6,911	6,703
Income related to lease payments	5,171	8,837	12,274
Losses on investment securities available-for-sale	(3,889)	(2,926)	(184)
Other	16,714	19,895	15,042
Total noninterest income	86,307	90,623	91,262
Noninterest expense:
Salaries and employee benefits	121,909	115,612	105,110
Net occupancy	11,939	11,090	10,728
Furniture and equipment	5,612	5,653	5,448
Data processing	27,567	25,055	22,375
Depreciation - leased equipment	4,073	7,093	10,023
Professional fees	7,098	6,705	7,280
FDIC and other insurance	6,142	5,926	3,625
Business development and marketing	6,876	7,157	5,823
Other	12,385	17,433	14,287
Total noninterest expense	203,601	201,724	184,699
Income before income taxes	171,057	161,680	156,787
Income tax expense	38,439	36,746	36,255
Net income	132,618	124,934	120,532
Net loss (income) attributable to noncontrolling interests	5	(7)	(23)
Net income available to common shareholders	$ 132,623	$ 124,927	$ 120,509
Basic net income per common share, in dollars per share	$ 5.36	$ 5.03	$ 4.84
Diluted net income per common share, in dollars per share	$ 5.36	$ 5.03	$ 4.84
Trust and wealth advisory
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	$ 26,709	$ 23,706	$ 23,107
Service charges on deposit accounts
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	12,877	12,749	12,146
Debit card
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	$ 17,785	$ 17,980	$ 18,052

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 132,618	$ 124,934	$ 120,532
Other comprehensive income (loss):
Unrealized appreciation (depreciation) of investment securities available-for-sale	21,483	51,360	(181,237)
Reclassification adjustment for realized losses included in net income	3,889	2,926	184
Income tax effect	(6,281)	(12,919)	43,224
Other comprehensive income (loss), net of tax	19,091	41,367	(137,829)
Comprehensive income (loss)	151,709	166,301	(17,297)
Comprehensive loss (income) attributable to noncontrolling interests	5	(7)	(23)
Comprehensive income (loss) available to common shareholders	$ 151,714	$ 166,294	$ (17,320)

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Treasury Stock, Common	Accumulated Other Comprehensive Income (Loss), Net	Total Shareholders' Equity	Noncontrolling Interests
Balance at Dec. 31, 2021	$ 969,464	$ 436,538	$ 603,787	$ (114,209)	$ (9,861)	$ 916,255	$ 53,209
Increase (Decrease) in Stockholders' Equity
Net income	120,532		120,509			120,509	23
Other comprehensive income (loss)	(137,829)				(137,829)	(137,829)
Issuance of 88,555, 82,840, and 72,593 common shares under stock based compensation awards for 2024, 2023 and 2022, respectively	3,165		1,762	1,403		3,165
Cost of 2,997, 310,522, and 149,819 shares of common stock acquired for treasury for 2024, 2023, and 2022, respectively	(6,836)			(6,836)		(6,836)
Common stock dividend ($1.40, $1.30, and $1.26 per share for 2024, 2023, and 2022, respectively)	(31,196)		(31,196)			(31,196)
Contributions from noncontrolling interests	(7,700)					0	(7,700)
Distributions to noncontrolling interests	(1,234)					0	(1,234)
Balance at Dec. 31, 2022	$ 923,766	436,538	694,862	(119,642)	(147,690)	864,068	59,698
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	72,593
Common stock acquired for treasury, shares	149,819
Common stock dividend (in dollars per share)	$ 1.26
Net income	$ 124,934		124,927			124,927	7
Other comprehensive income (loss)	41,367				41,367	41,367
Issuance of 88,555, 82,840, and 72,593 common shares under stock based compensation awards for 2024, 2023 and 2022, respectively	3,806		2,184	1,622		3,806
Cost of 2,997, 310,522, and 149,819 shares of common stock acquired for treasury for 2024, 2023, and 2022, respectively	(12,469)			(12,469)		(12,469)
Common stock dividend ($1.40, $1.30, and $1.26 per share for 2024, 2023, and 2022, respectively)	(32,131)		(32,131)			(32,131)
Contributions from noncontrolling interests	(20,343)					0	(20,343)
Distributions to noncontrolling interests	(1,353)					0	(1,353)
Balance at Dec. 31, 2023	$ 1,068,263	436,538	789,842	(130,489)	(106,323)	989,568	78,695
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	82,840
Common stock acquired for treasury, shares	310,522
Common stock dividend (in dollars per share)	$ 1.30
Net income	$ 132,618		132,623			132,623	(5)
Other comprehensive income (loss)	19,091				19,091	19,091
Issuance of 88,555, 82,840, and 72,593 common shares under stock based compensation awards for 2024, 2023 and 2022, respectively	4,354		2,862	1,492		4,354
Cost of 2,997, 310,522, and 149,819 shares of common stock acquired for treasury for 2024, 2023, and 2022, respectively	(178)			(178)		(178)
Common stock dividend ($1.40, $1.30, and $1.26 per share for 2024, 2023, and 2022, respectively)	(34,390)		(34,390)			(34,390)
Contributions from noncontrolling interests	(2,332)					0	2,332
Distributions to noncontrolling interests	(5,920)					0	(5,920)
Balance at Dec. 31, 2024	$ 1,181,506	$ 436,538	$ 890,937	$ (129,175)	$ (87,232)	$ 1,111,068	$ 70,438
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	88,555
Common stock acquired for treasury, shares	2,997
Common stock dividend (in dollars per share)	$ 1.40

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Cash Flows [Abstract]
Net income	$ 132,618	$ 124,934	$ 120,532
Provision for credit losses	12,466	5,866	13,245
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	4,457	4,452	4,596
Depreciation - leased equipment	4,073	7,093	10,023
Stock-based compensation	5,655	4,891	3,587
Amortization of investment securities premiums and accretion of discounts, net	1,709	3,939	3,951
Amortization of mortgage servicing rights	781	845	1,287
Amortization of right of use assets	3,050	3,073	3,181
Deferred income taxes	2,432	(9,462)	(9,461)
Losses on investment securities available-for-sale	3,889	2,926	184
Originations of loans held for sale, net of principal collected	(62,002)	(43,665)	(86,185)
Proceeds from the sales of loans held for sale	61,781	47,060	97,166
Net gains on sale of loans held for sale	(906)	(923)	(1,611)
Net gains on sale of other real estate and repossessions	(214)	(123)	(410)
Change in interest receivable	(2,558)	(5,485)	(6,987)
Change in interest payable	6,974	23,521	4,115
Change in other assets	(4,164)	4,089	413
Change in other liabilities	23,627	17,864	21,910
Other	185	(2,959)	(4,006)
Net change in operating activities	193,853	187,936	175,530
Investing activities:
Proceeds from sales of investment securities available-for-sale	62,616	102,437	23,795
Proceeds from maturities and paydowns of investment securities available-for-sale	368,190	145,006	206,426
Purchases of investment securities available-for-sale	(324,731)	(47,494)	(327,496)
Net change in partnership investments	(34,404)	(51,121)	(18,292)
Net change in other investments	1,220	218	1,896
Loans sold or participated to others	119,678	49,603	57,473
Proceeds from principal payments on direct finance leases	68,806	71,044	58,654
Net change in loans and leases	(534,763)	(628,268)	(784,355)
Net change in equipment owned under operating leases	4,810	4,241	6,710
Purchases of premises and equipment	(12,367)	(5,980)	(2,380)
Proceeds from disposal of premises and equipment	613	142	49
Purchases of bank owned life insurance policies	0	0	(10,000)
Proceeds from sales of other real estate and repossessions	3,727	1,886	2,648
Net change in investing activities	(276,605)	(358,286)	(784,872)
Financing activities:
Net change in demand deposits and savings accounts	140,415	(487,911)	(7,122)
Net change in time deposits	51,039	598,227	256,322
Net change in short-term borrowings	(63,161)	96,830	15,502
Payments on long-term debt	(12,630)	(3,450)	(25,530)
Stock issued under stock purchase plans	153	78	252
Acquisition of treasury stock	(178)	(12,469)	(6,836)
Net (distributions to) contributions from noncontrolling interests	(2,332)	18,990	6,466
Cash dividends paid on common stock	(35,396)	(33,074)	(32,102)
Net change in financing activities	77,910	177,221	206,952
Net change in cash and cash equivalents	(4,842)	6,871	(402,390)
Cash and cash equivalents, beginning of year	129,668	122,797	525,187
Cash and cash equivalents, end of year	124,826	129,668	122,797
Non-cash transactions:
Loans transferred to other real estate and repossessions	3,452	2,038	1,811
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	1,153	1,753	683
Right of use assets obtained in exchange for lease obligation	2,723	3,852	2,027
Liquidation of noncontrolling interests	5,920	0	0
Purchases of mandatorily redeemable securities with common stock	739	0	0
Cash paid for:
Interest	176,227	114,739	26,233
Income taxes	$ 11,281	$ 17,799	$ 23,258

Accounting Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Accounting Policies	Accounting Policies 1st Source Corporation is a bank holding company headquartered in South Bend, Indiana that provides, through its subsidiaries (collectively referred to as “1st Source” or “the Company”), a broad array of financial products and services. 1st Source Bank (“Bank”), its banking subsidiary, offers commercial and consumer banking services, trust and wealth advisory services, and insurance to individual and business clients. The following is a summary of significant accounting policies followed in the preparation of the consolidated financial statements. Basis of Presentation — The financial statements consolidate 1st Source, its subsidiaries (principally the Bank) and any variable interest entities (“VIEs”) for which the Company has concluded it has significant involvement in and the ability to direct the activities that impact the entity’s economic performance. All significant intercompany balances and transactions have been eliminated. For purposes of the parent company only financial information presented in Note 23, investments in subsidiaries are carried at equity in the underlying net assets. Use of Estimates in the Preparation of Financial Statements — Financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) require the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates. Business Combinations — Business combinations are accounted for under the purchase method of accounting. Under the purchase method, assets and liabilities of the business acquired are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value of the net tangible and intangible assets acquired recorded as goodwill. Results of operations of the acquired business are included in the income statement from the date of acquisition. Cash Flows — For purposes of the consolidated and parent company only statements of cash flows, the Company considers cash and due from banks, federal funds sold and interest bearing deposits with other banks with original maturities of three months or less as cash and cash equivalents. Securities — Securities that the Company has the ability and positive intent to hold to maturity are classified as investment securities held-to-maturity. Held-to-maturity investment securities, when present, are carried at amortized cost. As of December 31, 2024 and 2023, the Company held no securities classified as held-to-maturity. Securities that may be sold in response to, or in anticipation of, changes in interest rates and resulting prepayment risk, or for other factors, are classified as available-for-sale and are carried at fair value. Unrealized gains and losses on debt securities are reported, net of applicable taxes, as a separate component of accumulated other comprehensive income (loss) in shareholders’ equity. Unrealized gains and losses on equity securities are reflected, net of applicable taxes, in earnings. For available-for-sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of these criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value in Other Income on the Consolidated Statements of Income. For debt securities that do not meet the aforementioned criteria, the Company evaluates 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, nature of the security, the underlying collateral, and the financial condition of the issuer, among other factors. If this assessment indicates a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for available-for-sale securities losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for available-for-sale securities losses is recognized in other comprehensive income. Changes in the allowance for available-for-sale securities are recorded as a component of credit loss expense. Losses are charged against the allowance for available-for-sale securities losses when management believes the uncollectibility of an available-for-sale security is confirmed or when either criteria regarding intent or requirement to sell is met. Debt and equity securities that are purchased and held principally for the purpose of selling them in the near term are classified as trading account securities and are carried at fair value with unrealized gains and losses reported in earnings. Realized gains and losses on the sales of all securities are reported in earnings and computed using the specific identification cost basis. Other investments consist of shares of Federal Home Loan Bank of Indianapolis (FHLBI) and Federal Reserve Bank stock. As restricted member stocks, these investments are carried at cost. Both cash and stock dividends received on the stocks are reported as income. Quarterly, the Company reviews its investment in FHLBI for impairment. Factors considered in determining impairment are: history of dividend payments; determination of cause for any net loss; adequacy of capital; and review of the most recent financial statements. As of December 31, 2024 and 2023, it was determined that the Company’s investment in FHLBI stock is appropriately valued at cost, which equates to par value. In addition, other investments include interest bearing deposits with other banks with original maturities of greater than three months. These investments are in denominations, including accrued interest, that are fully insured by the FDIC. Loans and Leases — Loans are stated at the principal amount outstanding, net of unamortized deferred loan origination fees and costs and net of unearned income. Interest income is accrued as earned based on unpaid principal balances. Origination fees and direct loan and lease origination costs are deferred, and the net amount amortized to interest income over the estimated life of the related loan or lease. Loan commitment fees are deferred and amortized into other income over the commitment period. Direct financing leases are carried at the aggregate of lease payments plus estimated residual value of the leased property, net of unamortized deferred lease origination fees and costs and unearned income. Only those costs incurred as a direct result of closing a lease transaction are capitalized and all initial direct costs are expensed immediately. Interest income on direct financing leases is recognized over the term of the lease to achieve a constant periodic rate of return on the outstanding investment. Accrued interest is included in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition. The accrual of interest on loans and leases is discontinued when a loan or lease becomes contractually delinquent for 90 days, or when an individual analysis of a borrower’s credit worthiness indicates a credit should be placed on nonperforming status, except for residential mortgage loans and consumer loans that are well secured and in the process of collection. Residential mortgage loans are placed on nonaccrual at the time the loan is placed in foreclosure. When interest accruals are discontinued, interest credited to income in the current year is reversed and interest accrued in the prior year is charged to the allowance for loan and lease losses. However, in some cases, the Company may elect to continue the accrual of interest when the net realizable value of collateral is sufficient to cover the principal and accrued interest. When a loan or lease is classified as nonaccrual and the future collectability of the recorded loan or lease balance is doubtful, collections on interest and principal are applied as a reduction to principal outstanding. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured, which is typically evidenced by a sustained repayment performance of at least six months. Occasionally, the Company modifies loans and leases to borrowers experiencing financial difficulty (typically denoted by internal credit quality graded “substandard” or worse) by providing term extensions, other-than-insignificant payment delays, or interest rate reductions. In some cases, multiple modifications are made to the same loan or lease. These modifications typically result from the Company’s loss mitigation activities. If the Company determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized through an allowance for loan and lease losses estimate or a charge-off to the allowance for loan and lease losses. The Company sells mortgage loans to the Government National Mortgage Association (GNMA) in the normal course of business and retains the servicing rights. The GNMA programs under which the loans are sold allow the Company to repurchase individual delinquent loans that meet certain criteria from the securitized loan pool. At its option, and without GNMA’s prior authorization, the Company may repurchase a delinquent loan for an amount equal to 100% of the remaining principal balance on the loan. Once the Company has the unconditional ability to repurchase a delinquent loan, the Company is deemed to have regained effective control over the loan and the Company is required to recognize the loan on its balance sheet and record an offsetting liability, regardless of its intent to repurchase the loan. At December 31, 2024 and 2023, residential real estate portfolio loans included $1.85 million and $1.55 million, respectively, of loans available for repurchase under the GNMA optional repurchase programs with the offsetting liability recorded within Other Short-term Borrowings on the Consolidated Statements of Financial Position. Mortgage Banking Activities — Loans held for sale are composed of performing one-to-four family residential mortgage loans originated for resale. Mortgage loans originated with the intent to sell are carried at fair value. The Company recognizes the rights to service mortgage loans for others as separate assets, whether the servicing rights are acquired through a separate purchase or through the sale of originated loans with servicing rights retained. The Company allocates a portion of the total proceeds of a mortgage loan to servicing rights based on the relative fair value. These assets are amortized as reductions of mortgage servicing fee income over the estimated servicing period in proportion to the estimated servicing income to be received. The balance of MSRs is located in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition and the gains and losses on the sale of MSRs are recognized in Noninterest Income on the Consolidated Statements of Income in the period in which such rights are sold. MSRs are evaluated for impairment at each reporting date. For purposes of impairment measurement, MSRs are stratified based on the predominant risk characteristics of the underlying servicing, principally by loan type. If temporary impairment exists within a tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the fair value. If it is later determined all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced through a recovery of income. MSRs are also reviewed for permanent impairment. Permanent impairment exists when recoverability of a recorded valuation allowance is determined to be remote considering historical and projected interest rates, prepayments, and loan pay-off activity. When this situation occurs, the unrecoverable portion of the valuation allowance is applied as a direct write-down to the carrying value of the MSRs. Unlike a valuation allowance, a direct write-down permanently reduces the carrying value of the MSRs and the valuation allowance, precluding subsequent recoveries. As part of mortgage banking operations, the Company enters into commitments to originate loans whereby the interest rate on these loans is determined prior to funding (“rate lock commitments”). Similar to loans held for sale, the fair value of rate lock commitments is subject to change primarily due to changes in interest rates. Under the Company’s risk management policy, these fair values are hedged primarily by selling forward contracts on agency securities at the time the interest rate locks are issued to the customers. The rate lock commitments on mortgage loans intended to be sold and the related hedging instruments are recorded at fair value with changes in fair value recorded in current earnings. Transfers of Financial Assets — Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been legally isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets. Allowance for Credit Losses: Loans and leases — Accrued interest on loans and leases is excluded from the calculation of the allowance for credit losses due to the Company’s charge-off policy to reverse accrued interest on nonperforming loans against interest income in a timely manner. Expected credit losses on net investments in leases, including any unguaranteed residual asset, are included in the allowance for loan and lease losses. Allowance for Loan and Lease Losses — The allowance for credit losses is established for current expected credit losses on the Company’s loan and lease portfolio. It is the Company’s policy to maintain the allowance at a level believed to be adequate to absorb estimated credit losses within its portfolio of loans and leases. The determination of the allowance requires significant judgment to estimate credit losses measured on a collective pool basis when similar risk characteristics exist, and for loans evaluated individually. In determining the allowance, the Company estimates expected future losses for the loan’s entire contractual term adjusted for expected payments when appropriate. The allowance estimate considers relevant available information, from internal and external sources relating to the historical loss experience, current conditions, and reasonable and supportable forecasts for the Company’s outstanding loan and lease balances. The allowance is an estimation that reflects management’s evaluation of expected losses related to the Company’s financial assets measured at amortized cost. To ensure that the allowance is maintained at an adequate level, a detailed analysis is performed on a quarterly basis and an appropriate provision is made to adjust the allowance. The Company categorizes its loan portfolios into nine segments based on similar risk characteristics. Loans within each segment are collectively evaluated using either: 1) a cohort cumulative loss rate methodology (“cohort”) or, 2) the probability of default (“PD”)/loss given default (“LGD”) methodology (PD/LGD). The cohort methodology is applied to ungraded portfolios, portfolios where receipt of financial statements is generally less timely, and portfolios where there are numerous small dollar accounts that are credit scored. Loans are broken out by internal risk rating (loan grade) bands: 1-6 and 7-12 (special attention). For ungraded portfolios, there is only one pool. The cohort methodology has a steady state assumption; qualitative adjustments capture any differences that may exist between the current and historical conditions. The PD/LGD methodology is applied to graded portfolios due to the quantitative nature of the Company’s risk rating system and is consistent with the Company’s definition of risk, downgrading a credit where and when appropriate and recognizing losses in a timely manner. Loans are broken out by risk rating (loan grade) bands: 1-3, 4-6, 7-8, and 9-12. The amortized cost loan balances (rather than counts) are used for determining the transition and default probabilities. The Company uses risk rating bands as the active state to track the movement of loans through the transition matrix. The transition frequency is quarterly. Default is defined as the point at which a loan is placed on non-accrual status. In addition, a charge-off is assumed to be a default (i.e. a loan goes from accruing to charge-off, without ever being on non-accrual status). The PD is the cumulative probability of default estimated by use of a transition matrix (based on a Markov transition matrix methodology) which captures the migration of a loan from one risk rating band to another. The LGD is the ratio of loss relative to the exposure (amortized cost) at default. The current expected credit loss methodology has a factor for reasonable and supportable forecasts. Generally, reasonable and supportable forecasts are for two years or less and have a reversion period of a similar duration, reverting expected credit losses to a level that is consistent with our historical loss experience. Forecast adjustments are added via basis points for the cohort methodology. For the PD/LGD methodology, adjustments to the probability of default factor are applied through forecast adjustments to the PD factor used as the baseline transition matrix runout, thus impacting the historical loss ratio. The Company developed its reasonable and supportable forecasts using relevant data including, but not limited to, growth in gross domestic product, unemployment rates, housing market trends, commodity prices, inflation, and other factors associated with credit losses on the financial statements. For both the cohort and the PD/LGD methodologies, the Company uses qualitative adjustments to capture differences that may exist between the current and historical conditions. Qualitative factors include but are not limited to current market risk assessment by industry, recent loss experience in particular segments of the portfolios, movement in equipment values collateralizing specialized industry portfolios, concentrations of credit risk, delinquencies, trends in volume, experience and depth of relationship managers and division management, and the effects of changes in lending policies and practices, including changes in quality of the loan and lease origination, servicing and risk management process. Loans which exhibit different risk characteristics than the pool are evaluated individually for potential credit deterioration. Loans evaluated individually are not included in the collective evaluation. These loans can be identified from a variety of sources including delinquency, non-accrual status, and complex or unusual transactions. The scope may include accruing loans that exhibit risk characteristics which differ from their pool or non-performing loans with risk characteristics not similar to other special attention loans in their pool. Individual reserves are determined based on an analysis of the loan’s expected future cash flows, the loan’s observable market value, or the fair value of the collateral less costs to sell. When foreclosure is probable, credit deterioration is determined based on the collateral’s fair value less costs to sell. As a practical expedient, fair value less costs to sell may be used when developing the estimate of credit losses. Similarly, for a going concern analysis, a discounted cash method may be used. Liability for Credit Losses on Unfunded Loan Commitments — The liability for credit losses on commitments to originate loans and standby letters of credit is included in Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition. Expected credit losses are estimated over the contractual period in which the Company is exposed to credit risk via a contractual obligation unless the obligation is unconditionally cancelable by the Company. The liability for credit losses on unfunded loan commitments is adjusted in the Provision for Credit Losses on the Consolidated Statements of Income. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated useful life. Because business processes and credit risks associated with unfunded credit commitments are essentially the same as for loans, the Company utilizes similar processes to estimate its liability for unfunded credit commitments. Equipment Owned Under Operating Leases — As a lessor, the Company finances various types of construction equipment, medium and heavy duty trucks, automobiles and other equipment under leases classified as operating leases. The equipment underlying the operating leases is reported at cost, net of accumulated depreciation, on the Consolidated Statements of Financial Condition. These operating lease arrangements require the lessee to make a fixed monthly rental payment over a specified lease term generally ranging from three years to seven years. Revenue consists of the contractual lease payments and is recognized on a straight-line basis over the lease term and reported in Noninterest Income on the Consolidated Statements of Income. Leased assets are depreciated on a straight-line method over the lease term to the estimate of the equipment’s fair market value at lease termination, also referred to as “residual” value. The depreciation of these operating lease assets is reported in Noninterest Expense on the Consolidated Statements of Income. For automobile leases, fair value is based upon published industry market guides. For other equipment leases, fair value may be based upon observable market prices, third-party valuations, or prices received on sales of similar assets at the end of the lease term. These residual values are reviewed annually to ensure the recorded amount does not exceed the fair market value at the lease termination. At the end of the lease, the operating lease asset is either purchased by the lessee or returned to the Company. The Company is responsible for the payment of personal property taxes which is reported in Other Expense on the Consolidated Statements of Income. The lessee is responsible for reimbursing the Company for personal property taxes which is reported in Other Income on the Consolidated Statements of Income. The Company excludes sales taxes and other similar taxes from being reported as lease revenue with an associated expense. Lease Commitments — The Company leases certain banking center locations, office space, land and billboards. In determining whether a contract contains a lease, the Company examines the contract to ensure an asset was specifically identified and that the Company has control of use over the asset. To determine whether a lease is classified as operating or finance, the Company performs an economic life test on all building leases with greater than a twenty years term. Further, the Company performs a fair value test to identify any leases that have a present value of future lease payments over the lease term that is greater than 90% of the fair value of the building. The Company only capitalizes leases with an initial lease liability of $2,000 or greater. At lease inception, the Company determines the lease term by adding together the minimum lease term and all optional renewal periods that it is reasonably certain to renew. The Company determines this on each lease by considering all relevant contract-based, asset-based, market-based, and entity-based economic factors. Generally, the exercise of lease renewal options is at the Company’s sole discretion. The lease term is used to determine whether a lease is operating or finance and is used to calculate straight-line rent expense. Additionally, the depreciable life of leasehold improvements is limited by the expected lease term. Operating lease rentals are expensed on a straight-line basis over the life of the lease beginning on the date the Company takes possession of the property. Rent expense and variable lease costs are included in Net Occupancy Expense on the Consolidated Statements of Income. Included in variable lease costs are leases with rent escalations based on recent financial indices, such as the Consumer Price Index, where the Company initially measures lease payments using the index on the commencement date and records future changes in rent payments resulting from changes in the index to variable costs in the period the changes occur. Certain leases require the Company to pay common area maintenance, real estate taxes, insurance and other operating expenses associated with the leases premises. These expenses are classified in Net Occupancy Expense on the Consolidated Statements of Income, consistent with similar costs for owned locations. There are no residual value guarantees, restrictions or covenants imposed by leases. The Company accounts for lease and nonlease components together as a single lease component by class of underlying asset. Operating lease obligations with an initial term longer than 12 months are recorded with a right of use asset and a lease liability on the Consolidated Statements of Financial Condition. The discount rate used in determining the lease liability and related right of use asset is based upon what would be obtained by the Company for similar loans as an incremental rate as of the date of origination or renewal. Other Real Estate — Other real estate acquired through partial or total satisfaction of nonperforming loans is included in Other Assets on the Consolidated Statements of Financial Condition and recorded at fair value less anticipated selling costs based upon the property’s appraised value at the date of transfer, with any difference between the fair value of the property less cost to sell, and the carrying value of the loan charged to the allowance for loan and lease losses or other income, if a positive adjustment. Subsequent fair value write-downs or write-ups, to the extent of previous write-downs, property maintenance costs, and gains or losses recognized upon the sale of other real estate are recognized in Noninterest Expense on the Consolidated Statements of Income. Gains or losses resulting from the sale of other real estate are recognized on the date of sale. As of December 31, 2024 and 2023, other real estate had carrying values of $0.46 million and $0.00 million, respectively, and is included in Other Assets on the Consolidated Statements of Financial Condition. Repossessed Assets — Repossessed assets may include fixtures and equipment, inventory and receivables, aircraft, construction equipment, and vehicles acquired from business banking and specialty finance activities. Repossessed assets are included in Other Assets on the Consolidated Statements of Financial Condition at fair value of the equipment or vehicle less estimated selling costs. At the time of repossession, the recorded amount of the loan or lease is written down to the fair value of the equipment or vehicle by a charge to the allowance for loan and lease losses or other income, if a positive adjustment. Subsequent fair value write-downs or write-ups, to the extent of previous write-downs, equipment maintenance costs, and gains or losses recognized upon the sale of repossessions are recognized in Noninterest Expense on the Consolidated Statements of Income. Gains or losses resulting from the sale of repossessed assets are recognized on the date of sale. Repossessed assets totaled $0.16 million and $0.71 million, as of December 31, 2024 and 2023, respectively, and are included in Other Assets on the Consolidated Statements of Financial Condition. Premises and Equipment — Premises and equipment are stated at cost, less accumulated depreciation and amortization. The provision for depreciation is computed by the straight-line method, primarily with useful lives ranging from three years to 31.5 years. Maintenance and repairs are charged to expense as incurred, while improvements, which extend the useful life, are capitalized and depreciated over the estimated remaining life. Goodwill and Intangibles — Goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired. Other intangible assets represent purchased assets that also lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Goodwill is reviewed for impairment at least annually or on an interim basis if an event occurs or circumstances change that would more likely than not reduce the carrying amount. Goodwill is allocated into two reporting units. Fair value for each reporting unit is estimated using stock price multiples or earnings before interest, tax, depreciation and amortization (EBITDA) multiples. Intangible assets that have finite lives are amortized over their estimated useful lives and are subject to impairment testing. All of the Company’s other intangible assets have finite lives and are amortized on a straight-line basis over varying periods not exceeding twenty-five years. The Company performed the required annual impairment test of goodwill during the fourth quarter of 2024 and determined that no impairment exists. Bank-Owned Life Insurance (BOLI) — The Company maintains BOLI on certain executives. BOLI balances are recorded at their cash surrender values and are included in Other Assets on the Consolidated Statements of Financial Condition. Changes in the cash surrender values are included in Other Noninterest Income on the Consolidated Statements of Income. At December 31, 2024 and 2023, BOLI totaled $86.40 million and $84.41 million, respectively. Partnership Investments — The Company accounts for its investments in partnerships for which it owns less than fifty percent and has the ability to exercise significant influence over the partnership on the equity method. The Company accounts for its investments in partnerships for which it does not have the ability to exercise significant influence at fair value less impairment, if any, or cost less any impairment if the fair value is not readily determinable. The Company has elected to use the practical expedient to estimate fair value of an investment in an investment company using the net asset value of its partnership interest. The Company uses the hypothetical liquidation book value (HLBV) method for equity investments when the liquidation rights and priorities as defined by an equity investment agreement differ from what is reflected by the underlying percentage ownership interests. The HLBV method is commonly applied to equity investments in the renewable energy industry, where the economic benefits corresponding to an equity investment may vary at different points in time and/or are not directly linked to an investor’s ownership percentage. A calculation is prepared at each balance sheet date to determine the amount that the Company would receive if an equity investment entity were to liquidate all of its assets (as valued in accordance with GAAP) and distribute that cash to the investors based on the contractually defined liquidation priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period, after adjusting for capital contributions and distributions, is 1st Source’s share of the earnings or losses from the equity investment for the period. Invest

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Debt: In November 2024, the Financial Accounting Standards Board (FASB) issued ASU No. 2024-04 “ Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversion of Convertible Debt Issuances. ” These amendments clarify the requirements for determining whether certain settlements of convertible debt instruments, including convertible debt instruments with cash conversion features or convertible debt instruments that are not currently convertible, should be accounted for as an induced conversion. This guidance is effective for all entities for fiscal years including interim periods within those fiscal years, beginning after December 15, 2025. Early adoption is permitted in any interim period. The Company is assessing ASU 2024-04 and its impact on its accounting and disclosures. Income Statement: In November 2024, the FASB issued ASU No. 2024-03 “ Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ” These amendments require public companies to disclose, in the notes to financial statements, specified information about certain costs and expenses at each interim and annual reporting period. Specifically, they will be required to: • Disclose the amounts of (a) purchases of inventory; (b) employee compensation; (c) depreciation; (d) intangible asset amortization; and (e) depreciation, depletion, and amortization recognized as part of oil- and gas-producing activities (or other amounts of depletion expense) included in each relevant expense caption. • Include certain amounts that are already required to be disclosed under current generally accepted accounting principles (GAAP) in the same disclosure as the other disaggregation requirements. • Disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. • Disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. In January 2025, the FASB issued ASU No. 2025-01 clarifying the effective date for public business entities for fiscal years beginning after December 15, 2026 and interim periods within annual reporting periods beginning after December 15, 2027. Early adoption is permitted. The Company is assessing ASU 2024-03 and its impact on its accounting and disclosures. Income Taxes: In December 2023, the FASB issued Accounting Standards Update (ASU) No. 2023-09 “ Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ” Among other things, these amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than five percent of the amount computed by multiplying pretax income (loss) by the applicable statutory income tax rate.) The amendments also require that all entities disclose on an annual basis the following information about income taxes paid: (1) the amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign taxes and (2) the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than five percent of total income taxes paid (net of refunds received.) This guidance is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The amendments should be applied on a prospective basis although retrospective application is permitted. The Company is assessing ASU 2023-09 and its impact on its disclosures. Segment Reporting: In November 2023, the FASB issued ASU 2023-07 “ Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. ” These amendments require, among other things, that a public entity that has a single reportable segment provide all the disclosures required by the amendments in this ASU and all existing segment disclosures in Topic 208. The ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. A public entity should apply the amendments retrospectively to all periods presented in the financial statements. The Company adopted ASU 2023-07 on January 1, 2024 and it did not have a material impact on its accounting and disclosures.

Investment Securities Available

Investment Securities Available-For-Sale	12 Months Ended
	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Available-For-Sale The following table shows investment securities available-for-sale. (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value December 31, 2024 U.S. Treasury and Federal agencies securities $ 786,417 $ 24 $ (28,692) $ 757,749 U.S. States and political subdivisions securities 86,305 33 (3,706) 82,632 Mortgage-backed securities - Federal agencies 777,962 192 (82,236) 695,918 Corporate debt securities — — — — Foreign government securities — — — — Total investment securities available-for-sale $ 1,650,684 $ 249 $ (114,634) $ 1,536,299 December 31, 2023 U.S. Treasury and Federal agencies securities $ 979,530 $ 178 $ (56,842) $ 922,866 U.S. States and political subdivisions securities 97,522 508 (5,466) 92,564 Mortgage-backed securities - Federal agencies 676,257 476 (78,481) 598,252 Corporate debt securities 8,448 — (119) 8,329 Foreign government securities 600 — (11) 589 Total investment securities available-for-sale $ 1,762,357 $ 1,162 $ (140,919) $ 1,622,600 Amortized cost excludes accrued interest receivable which is included in Accrued Income and Other Assets At December 31, 2024, the residential mortgage-backed securities held by the Company consisted primarily of GNMA, FNMA and FHLMC pass-through certificates which are guaranteed by those respective agencies of the United States government (Government Sponsored Enterprise, GSEs). The Company did not hold any marketable equity securities at December 31, 2024 and 2023. The following table shows the contractual maturities of investments in debt securities available-for-sale at December 31, 2024. Expected maturities will differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 253,351 $ 248,772 Due after one year through five years 550,751 523,993 Due after five years through ten years 52,645 52,076 Due after ten years 15,975 15,540 Mortgage-backed securities 777,962 695,918 Total debt securities available-for-sale $ 1,650,684 $ 1,536,299 The following table summarizes gross unrealized losses and fair value by investment category and age. At December 31, 2024, the Company’s available-for-sale securities portfolio consisted of 625 securities, 589 of which were in an unrealized loss position. Less than 12 Months 12 months or Longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses December 31, 2024 U.S. Treasury and Federal agencies securities $ 103,621 $ (1,324) $ 644,614 $ (27,368) $ 748,235 $ (28,692) U.S. States and political subdivisions securities 37,017 (670) 39,280 (3,036) 76,297 (3,706) Mortgage-backed securities - Federal agencies 191,779 (3,355) 466,204 (78,881) 657,983 (82,236) Corporate debt securities — — — — — — Foreign government securities — — — — — — Total debt securities available-for-sale $ 332,417 $ (5,349) $ 1,150,098 $ (109,285) $ 1,482,515 $ (114,634) December 31, 2023 U.S. Treasury and Federal agencies securities $ — $ — $ 913,417 $ (56,842) $ 913,417 $ (56,842) U.S. States and political subdivisions securities 1,251 (2) 69,747 (5,464) 70,998 (5,466) Mortgage-backed securities - Federal agencies 8,553 (98) 550,748 (78,383) 559,301 (78,481) Corporate debt securities — — 8,329 (119) 8,329 (119) Foreign government securities — — 589 (11) 589 (11) Total debt securities available-for-sale $ 9,804 $ (100) $ 1,542,830 $ (140,819) $ 1,552,634 $ (140,919) The Company does not consider available-for-sale securities with unrealized losses at December 31, 2024 to be experiencing credit losses and recognized no resulting allowance for credit losses. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost basis, which may be the maturity dates of the securities. The unrealized losses occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. The following table shows the gross realized gains and losses from the available-for-sale debt securities portfolio. Realized gains and losses of all securities are computed using the specific identification cost basis. (Dollars in thousands) 2024 2023 2022 Gross realized gains $ — $ 733 $ — Gross realized losses (3,889) (3,659) (184) Net realized (losses) gains $ (3,889) $ (2,926) $ (184) At December 31, 2024 and 2023, investment securities with carrying values of $359.10 million and $411.38 million, respectively, were pledged as collateral for security repurchase agreements and for other purposes.

Loan and Lease Financings

Loan and Lease Financings	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
Loan and Lease Financings	Loan and Lease Financings Total loans and leases outstanding were recorded net of unearned income and deferred loan fees and costs at December 31, 2024 and 2023, and totaled $6.85 billion and $6.52 billion, respectively. At December 31, 2024 and 2023, net deferred loan and lease costs were $1.43 million and $1.65 million, respectively. Accrued interest receivable In the ordinary course of business, the Company has extended loans to certain directors, executive officers, and principal shareholders of equity securities of 1st Source and to their affiliates. In the opinion of management, these loans are made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with persons not related to the Company and did not involve more than the normal risk of collectability, or present other unfavorable features. The loans are consistent with sound banking practices and within applicable regulatory and lending limitations. The aggregate dollar amounts of these loans were $23.13 million and $7.74 million at December 31, 2024 and 2023, respectively. During 2024, $19.86 million of new loans and other additions were made and $4.47 million of repayments and other reductions occurred. During 2023, $8.51 million of new loans and other additions were made and $13.30 million of repayments and other reductions occurred. The Company evaluates loans and leases, except residential real estate and home equity loans and consumer loans, for credit quality at least annually but more frequently if certain circumstances occur (such as material new information which becomes available and indicates a potential change in credit risk). The Company uses two methods to assess credit risk: loan or lease credit quality grades and credit risk classifications. The purpose of the loan or lease credit quality grade is to document the degree of risk associated with individual credits as well as inform management of the degree of risk in the portfolio taken as a whole. Credit risk classifications are used to categorize loans by degree of risk and to designate individual or committee approval authorities for higher risk credits at the time of origination. Credit risk classifications include categories for: Acceptable, Marginal, Special Attention, Special Risk, Restricted by Policy, Regulated and Prohibited by Law. All loans and leases, except residential real estate and home equity loans and consumer loans, are assigned credit quality grades on a scale from 1 to 12 with grade 1 representing superior credit quality. The criteria used to assign grades to extensions of credit that exhibit potential problems or well-defined weaknesses are primarily based upon the degree of risk and the likelihood of orderly repayment, and their effect on the Company’s safety and soundness. Loans or leases graded 7 or weaker are considered “special attention” credits and, as such, relationships in excess of $250,000 are reviewed quarterly as part of management’s evaluation of the appropriateness of the allowance for loan and lease losses. Grade 7 credits are defined as “watch” and contain greater than average credit risk and are monitored to limit the Company’s exposure to increased risk; grade 8 credits are “special mention” and, following regulatory guidelines, are defined as having potential weaknesses that deserve management’s close attention. Credits that exhibit well-defined weaknesses and a distinct possibility of loss are considered ‘‘classified’’ and are graded 9 through 12 corresponding to the regulatory definitions of “substandard” (grades 9 and 10) and the more severe ‘‘doubtful’’ (grade 11) and ‘‘loss’’ (grade 12). For residential real estate and home equity and consumer loans, credit quality is based on the aging status of the loan and by payment activity. Nonperforming loans are those loans which are on nonaccrual status or are 90 or more past due. Below is a summary of the Company’s loan and lease portfolio segments and a discussion of the risk characteristics relevant to each portfolio segment. Commercial and agricultural – loans are to entities within the Company’s local market communities. Loans are for business or agri-business purposes and include working capital lines of credit secured by accounts receivable and inventory that are generally renewable annually and term loans secured by equipment with amortizations based on the expected life of the underlying collateral, generally three Renewable energy – loans are for the purpose of financing primarily solar related projects and may include construction draw notes, operating loans, letters of credit and may entail a tax equity structure. Collateral in a multi-state area includes tangible assets of the borrower, assignment of intangible assets including power purchase agreements, and pledges of permits and licenses. Financing is provided to qualified borrowers throughout the continental United States with an emphasis on the region east of the Rocky Mountains. Auto and light truck – loans are secured by vehicles and borrowers are nationwide. The portfolio consists of multiple industries: auto rental, auto leasing and a small specialty vehicle segment which the Company is largely exiting. Borrowers in the auto rental segment are primarily independent auto rental entities with on-airport and off-airport locations, and some insurance replacement business. Loan terms are relatively short, generally eighteen months, but up to four years. Auto leasing customers lease to businesses and the Company takes assignment of the lease stream and places its lien on the vehicles. Terms are generally longer than the auto rental sector, three Medium and heavy duty truck – loans and full-service truck leases are secured by heavy-duty trucks, commonly Class 8 trucks, and are generally personally guaranteed. In addition to economic risks, collateral risk is significant. Financing is generally at full cost, plus additional expenditures to get the vehicle operational, such as taxes, insurance and fees. It takes three Aircraft – loans are to domestic and foreign borrowers with the domestic segment further divided into two pools: 1) personal and business use, and 2) dealers and operators. The Company’s focus for the foreign sector is Latin America, principally Mexico and Brazil. Loans are primarily secured by new and used business jets and helicopters, with appropriate advances, amortizations of ten Construction equipment – loans are to borrowers throughout the country secured by specific equipment. The borrowers include highway and road builders, asphalt producers and pavers, suppliers of aggregate products, site developers, frac sand operations, general construction equipment dealers and operators, and crane rental entities. Generally, loans include personal guarantees. The construction equipment industry is heavily dependent on the U.S. economy and the global economy. Market growth is reliant on investments from public and private sectors into urbanization and infrastructure projects. Commercial real estate – loans are generally to entities within the local market communities served by the Company with advances generally within regulatory guidelines. Historically, the Company’s exposure to commercial real estate had been primarily to the less risky owner-occupied segment although growth in the non-owner-occupied segment of this portfolio has increased over the last several years. The non-owner-occupied segment includes hotels, apartment complexes and warehousing facilities. There is generally limited exposure to construction loans although at present, construction exposures are comparably higher than previous periods. Many commercial real estate loans carry personal guarantees. Additional risks in the commercial real estate portfolio include interest rate risk, geographical concentration in northern Indiana and southwest Michigan, and general economic conditions. Residential real estate and home equity – loans predominantly include one-to-four family mortgages to borrowers in the Company’s local market communities and are appropriately underwritten and secured by residential real estate. Consumer – loans are to individuals in the Company’s local markets and auto loans are generally secured by personal vehicles and appropriately underwritten. The following table shows the amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination as of December 31, 2024. Term Loans and Leases by Origination Year (Dollars in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 136,888 $ 115,508 $ 66,696 $ 36,315 $ 19,677 $ 18,369 $ 331,282 $ — $ 724,735 Grades 7-12 438 4,079 7,769 2,426 194 2,325 31,008 — 48,239 Total commercial and agricultural 137,326 119,587 74,465 38,741 19,871 20,694 362,290 — 772,974 Current period gross charge-offs — 276 117 550 — — 8,882 — 9,825 Renewable energy Grades 1-6 150,951 145,126 22,110 70,606 22,329 76,144 — — 487,266 Grades 7-12 — — — — — — — — — Total renewable energy 150,951 145,126 22,110 70,606 22,329 76,144 — — 487,266 Current period gross charge-offs — — — — — — — — — Auto and light truck Grades 1-6 443,033 276,295 106,199 25,535 10,018 6,677 — — 867,757 Grades 7-12 26,131 48,319 4,754 99 1,210 165 — — 80,678 Total auto and light truck 469,164 324,614 110,953 25,634 11,228 6,842 — — 948,435 Current period gross charge-offs — 165 448 6 — 111 — — 730 Medium and heavy duty truck Grades 1-6 88,395 72,816 81,238 25,726 11,298 5,493 — — 284,966 Grades 7-12 — 1,524 1,623 690 — 13 — 807 4,657 Total medium and heavy duty truck 88,395 74,340 82,861 26,416 11,298 5,506 — 807 289,623 Current period gross charge-offs — — — — — — — — — Aircraft Grades 1-6 347,099 190,776 285,677 151,194 82,208 32,326 7,773 — 1,097,053 Grades 7-12 2,882 7,704 10,920 1,846 3,392 — — — 26,744 Total aircraft 349,981 198,480 296,597 153,040 85,600 32,326 7,773 — 1,123,797 Current period gross charge-offs — — — 15 — 53 — — 68 Construction equipment Grades 1-6 488,870 325,443 208,114 70,258 33,095 10,890 25,916 1,966 1,164,552 Grades 7-12 2,716 10,650 11,686 1,679 12,629 — — — 39,360 Total construction equipment 491,586 336,093 219,800 71,937 45,724 10,890 25,916 1,966 1,203,912 Current period gross charge-offs 46 989 390 267 — — — — 1,692 Commercial real estate Grades 1-6 258,988 303,717 237,103 126,129 82,249 177,798 264 — 1,186,248 Grades 7-12 145 14,580 5,846 6,386 27 2,033 — — 29,017 Total commercial real estate 259,133 318,297 242,949 132,515 82,276 179,831 264 — 1,215,265 Current period gross charge-offs — — — — — — — — — Residential real estate and home equity Performing 87,045 69,439 94,441 81,345 79,575 85,333 173,876 6,210 677,264 Nonperforming — 171 624 346 103 340 1,138 85 2,807 Total residential real estate and home equity 87,045 69,610 95,065 81,691 79,678 85,673 175,014 6,295 680,071 Current period gross charge-offs — 3 — 32 — — 30 1 66 Consumer Performing 43,692 33,063 28,594 10,092 2,398 983 13,823 — 132,645 Nonperforming 22 352 336 57 33 20 — — 820 Total consumer 43,714 33,415 28,930 10,149 2,431 1,003 13,823 — 133,465 Current period gross charge-offs $ 565 $ 230 $ 276 $ 118 $ 16 $ 22 $ 122 $ — $ 1,349 The following table shows the amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination as of December 31, 2023. Term Loans and Leases by Origination Year (Dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 155,656 $ 124,717 $ 68,473 $ 39,708 $ 18,658 $ 15,856 $ 299,495 $ — $ 722,563 Grades 7-12 7,502 2,657 4,886 501 293 418 27,403 — 43,660 Total commercial and agricultural 163,158 127,374 73,359 40,209 18,951 16,274 326,898 — 766,223 Current period gross charge-offs 668 499 15 17 4 — 3,102 — 4,305 Renewable energy Grades 1-6 177,364 23,679 86,836 29,138 56,935 25,756 — — 399,708 Grades 7-12 — — — — — — — — — Total renewable energy 177,364 23,679 86,836 29,138 56,935 25,756 — — 399,708 Current period gross charge-offs — — — — — — — — — Auto and light truck Grades 1-6 603,406 248,701 64,182 24,986 13,573 5,287 — — 960,135 Grades 7-12 908 1,848 474 2,490 632 425 — — 6,777 Total auto and light truck 604,314 250,549 64,656 27,476 14,205 5,712 — — 966,912 Current period gross charge-offs 126 360 128 33 19 63 — — 729 Medium and heavy duty truck Grades 1-6 96,254 114,490 44,069 24,645 15,264 4,202 — — 298,924 Grades 7-12 3,565 7,010 1,675 — 773 — — — 13,023 Total medium and heavy duty truck 99,819 121,500 45,744 24,645 16,037 4,202 — — 311,947 Current period gross charge-offs — — — — — — — — — Aircraft Grades 1-6 269,635 355,175 197,579 140,744 37,244 36,936 6,420 — 1,043,733 Grades 7-12 10,120 9,475 3,704 4,543 — 6,597 — — 34,439 Total aircraft 279,755 364,650 201,283 145,287 37,244 43,533 6,420 — 1,078,172 Current period gross charge-offs — — — — — — — — — Construction equipment Grades 1-6 459,884 333,008 131,838 64,998 29,543 7,803 26,044 2,346 1,055,464 Grades 7-12 6,915 20,826 1,037 510 — — — — 29,288 Total construction equipment 466,799 353,834 132,875 65,508 29,543 7,803 26,044 2,346 1,084,752 Current period gross charge-offs — 44 10 — — — — — 54 Commercial real estate Grades 1-6 336,287 251,055 148,597 105,282 86,452 187,306 275 — 1,115,254 Grades 7-12 678 5,313 2,576 651 4,372 1,017 — — 14,607 Total commercial real estate 336,965 256,368 151,173 105,933 90,824 188,323 275 — 1,129,861 Current period gross charge-offs — 39 30 — 179 — — — 248 Residential real estate and home equity Performing 87,767 110,058 89,458 88,232 30,681 72,211 152,037 5,575 636,019 Nonperforming — 107 74 — 414 756 536 67 1,954 Total residential real estate and home equity 87,767 110,165 89,532 88,232 31,095 72,967 152,573 5,642 637,973 Current period gross charge-offs — — — — — 54 39 8 101 Consumer Performing 53,023 47,789 19,739 6,286 2,539 1,021 12,063 — 142,460 Nonperforming 63 246 123 31 28 6 — — 497 Total consumer 53,086 48,035 19,862 6,317 2,567 1,027 12,063 — 142,957 Current period gross charge-offs $ 541 $ 455 $ 138 $ 28 $ 17 $ 3 $ 29 $ — $ 1,211 The following table shows the amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status. (Dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due and Accruing Total Accruing Loans Nonaccrual Total Financing Receivables December 31, 2024 Commercial and agricultural $ 767,942 $ 275 $ 42 $ — $ 768,259 $ 4,715 $ 772,974 Renewable energy 487,266 — — — 487,266 — 487,266 Auto and light truck 943,403 2,226 — — 945,629 2,806 948,435 Medium and heavy duty truck 289,623 — — — 289,623 — 289,623 Aircraft 1,123,797 — — — 1,123,797 — 1,123,797 Construction equipment 1,185,936 — — — 1,185,936 17,976 1,203,912 Commercial real estate 1,203,967 9,703 — — 1,213,670 1,595 1,215,265 Residential real estate and home equity 675,669 1,010 585 96 677,360 2,711 680,071 Consumer 131,585 852 208 10 132,655 810 133,465 Total $ 6,809,188 $ 14,066 $ 835 $ 106 $ 6,824,195 $ 30,613 $ 6,854,808 December 31, 2023 Commercial and agricultural $ 752,947 $ 9 $ — $ — $ 752,956 $ 13,267 $ 766,223 Renewable energy 399,708 — — — 399,708 — 399,708 Auto and light truck 962,226 20 — — 962,246 4,666 966,912 Medium and heavy duty truck 311,915 32 — — 311,947 — 311,947 Aircraft 1,069,830 8,113 229 — 1,078,172 — 1,078,172 Construction equipment 1,078,912 2,044 3,620 — 1,084,576 176 1,084,752 Commercial real estate 1,126,806 — 85 — 1,126,891 2,970 1,129,861 Residential real estate and home equity 634,345 1,623 51 142 636,161 1,812 637,973 Consumer 141,489 864 107 7 142,467 490 142,957 Total $ 6,478,178 $ 12,705 $ 4,092 $ 149 $ 6,495,124 $ 23,381 $ 6,518,505 Interest income for the years ended December 31, 2024, 2023, and 2022, would have increased by approximately $2.06 million, $1.47 million, and $2.68 million, respectively, if the nonaccrual loans and leases had earned interest at their full contract rate. Loan Modifications to Borrowers Experiencing Financial Difficulty The following table shows the amortized cost of loans and leases over $250,000 at December 31, 2024 and 2023, respectively, that were both experiencing financial difficulty and modified during the twelve months ended December 31, 2024 and 2023, respectively, segregated by portfolio segment and type of modification. The percentage of the amortized cost of loans and leases that were modified to borrowers in financial distress as compared to the amortized cost of each segment of financial receivable is also presented below. (Dollars in thousands) Payment Term Interest Combination % of Total December 31, 2024 Commercial and agricultural $ 1,052 $ — $ — $ — 0.14 % Auto and light truck — — — 40,150 4.23 Medium and heavy duty truck — — — 3,017 1.04 Commercial real estate 988 — — — 0.08 Total $ 2,040 $ — $ — $ 43,167 0.66 % December 31, 2023 Commercial and agricultural $ 3,016 $ — $ — $ 1,537 0.59 % Medium and heavy duty truck — — — 11,050 3.54 Construction equipment — 1,496 — — 0.14 Commercial real estate 288 — 426 — 0.06 Total $ 3,304 $ 1,496 $ 426 $ 12,587 0.27 % There were $8.40 million and $2.27 million of commitments to lend additional amounts to the borrowers included in the previous table at December 31, 2024 and December 31, 2023, respectively. The Company closely monitors the performance of loans and leases that have been modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table shows the performance of such loans and leases that have been modified during the twelve months ended December 31, 2024 and December 31, 2023, respectively. (Dollars in thousands) Current 30-59 60-89 90 Days or Total December 31, 2024 Commercial and agricultural $ 1,052 $ — $ — $ — $ — Auto and light truck 39,664 — 486 — 486 Medium and heavy duty truck 3,017 — — — — Commercial real estate 988 — — — — Total $ 44,721 $ — $ 486 $ — $ 486 December 31, 2023 Commercial and agricultural $ 1,706 $ — $ — $ 2,847 $ 2,847 Medium and heavy duty truck 11,050 — — — $ — Construction equipment 1,496 — — — $ — Commercial real estate 426 288 — — $ 288 Total $ 14,678 $ 288 $ — $ 2,847 $ 3,135 The following table shows the financial effect of loan and lease modifications presented above to borrowers experiencing financial difficulty for the twelve months ended December 31, 2024 and December 31, 2023, respectively. Weighted- Weighted- Weighted- Average Payment Delay (in months) Combination Weighted-Average Payment Delay and Term Extension (in months) December 31, 2024 Commercial and agricultural — % 0 6 0 Auto and light truck — % 0 0 3 Medium and heavy duty truck — % 0 0 4 Commercial real estate — % 0 6 0 Total — % 0 6 3 December 31, 2023 Commercial and agricultural — % 3 6 30 Medium and heavy duty truck — % 0 0 6 Construction equipment — % 5 0 0 Commercial real estate 3.00 % 0 3 0 Total 3.00 % 4 6 10 There was one modified loan to a borrower experiencing financial difficulty that had a payment default and was modified within the twelve months prior to such default during each of the twelve month periods ended December 31, 2024 and December 31, 2023, respectively. Upon the Company’s determination that a modified loan or lease has subsequently been deemed uncollectible, the loan or lease is written off. Therefore, the amortized cost of the loan is reduced by the uncollectible amount and the allowance for loan and lease losses is adjusted by the same amount.

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses Allowance for Loan and Lease Losses The methodology used to estimate the appropriate level of the allowance for loan and lease losses is described in Note 1, under the heading “Allowance for Credit Losses.” The allowance for loan and lease losses at December 31, 2024 and 2023, represents the Company’s current estimate of lifetime credit losses inherent in the loan and lease portfolio. The following table shows the changes in the allowance for loan and lease losses, segregated by portfolio segment, for each of the three years ended December 31. (Dollars in thousands) Commercial and agricultural Renewable energy Auto and light truck Medium Aircraft Construction equipment Commercial real estate Residential real estate and home equity Consumer Total 2024 Balance, beginning of year $ 17,385 $ 6,610 $ 16,858 $ 8,965 $ 37,653 $ 26,510 $ 23,690 $ 7,698 $ 2,183 $ 147,552 Charge-offs 9,825 — 730 — 68 1,692 — 66 1,349 13,730 Recoveries 418 — 3,273 — 1,279 2,100 724 26 235 8,055 Net charge-offs (recoveries) 9,407 — (2,543) — (1,211) (408) (724) 40 1,114 5,675 Provision (recovery of provision) 13,338 1,952 (964) (1,673) (2,201) 1,340 407 318 1,146 13,663 Balance, end of year $ 21,316 $ 8,562 $ 18,437 $ 7,292 $ 36,663 $ 28,258 $ 24,821 $ 7,976 $ 2,215 $ 155,540 2023 Balance, beginning of year $ 14,635 $ 7,217 $ 18,634 $ 7,566 $ 41,093 $ 24,039 $ 17,431 $ 6,478 $ 2,175 $ 139,268 Charge-offs 4,305 — 729 — — 54 248 101 1,211 6,648 Recoveries 243 — 5,591 12 967 1,656 11 334 252 9,066 Net charge-offs (recoveries) 4,062 — (4,862) (12) (967) (1,602) 237 (233) 959 (2,418) Provision (recovery of provision) 6,812 (607) (6,638) 1,387 (4,407) 869 6,496 987 967 5,866 Balance, end of year $ 17,385 $ 6,610 $ 16,858 $ 8,965 $ 37,653 $ 26,510 $ 23,690 $ 7,698 $ 2,183 $ 147,552 2022 Balance, beginning of year $ 15,409 $ 6,585 $ 19,624 $ 6,015 $ 33,628 $ 19,673 $ 19,691 $ 5,084 $ 1,783 $ 127,492 Charge-offs 625 — 118 — — 1,114 538 284 730 3,409 Recoveries 56 — 417 — 785 17 45 160 460 1,940 Net charge-offs (recoveries) 569 — (299) — (785) 1,097 493 124 270 1,469 Provision (recovery of provision) (205) 632 (1,289) 1,551 6,680 5,463 (1,767) 1,518 662 13,245 Balance, end of year $ 14,635 $ 7,217 $ 18,634 $ 7,566 $ 41,093 $ 24,039 $ 17,431 $ 6,478 $ 2,175 $ 139,268 The allowance for loan and lease losses increased year-over-year in 2024 as most portfolio segments experienced loan growth, and special attention balances, which are reserved at higher rates, also increased. The Company remains cautious on the forward-outlook and the forecast adjustment was little changed from the prior period, reflecting fragile growth expectations during the forecast period. Allowance increases were partially offset by declines in historical loss rates due to recovery activity in select portfolios and lower specific impairments as compared to the prior year-end. Commercial and agricultural – allowance increased year-over-year due to modest loan growth, an increase in special attention balances which carry higher reserves, and higher loss rates within the portfolio. Renewable energy – allowance increased primarily due to loan growth along with an increase in qualitative adjustments to address higher interest rate and maturity risk within the portfolio. Auto and light truck – allowance increased due to higher special attention balances, which are reserved at higher rates, and an increase in qualitative adjustments to address increasing risk within the auto rental segment, partially offset by a slight decline in loan balances within the portfolio and recovery activity during the period. Medium and heavy duty truck – allowance decreased due to lower loan balances within the portfolio. The industry remains challenged by overcapacity. Aircraft – the allowance declined due to lower loss ratios from recovery activity primarily in the foreign aircraft segment during the period. Loan growth was modest and credit quality metrics remain stable. The Company carries a higher allowance in this portfolio due to historical risk volatility. Construction equipment – allowance increase was primarily driven by strong loan growth during the year. Commercial real estate – the allowance increase was due to loan growth across multiple segments. The Company continues to monitor construction risk and maturity repricing risk in the elevated interest rate environment. Residential real estate and home equity – the allowance increased due to loan growth. Consumer – the allowance showed minimal change as a qualitative adjustment for increased delinquency and nonperforming activity in the segment offset a decline in loan balances during the period. Economic Outlook As of December 31, 2024, the most significant economic factors impacting the Company’s loan portfolios was a fragile domestic growth outlook impacted by continued elevated inflation and high interest rates, along with various foreign conflicts and resultant geopolitical uncertainty. Consumer stressors are evident, and the Company remains concerned about small businesses prospects and their ability to absorb high interest rates and ever-increasing expenses. A few of the Company’s target industries are exhibiting signs of elevated risk including the auto rental, commercial and agricultural, and medium and heavy duty trucking segments. Tighter lending conditions and the current high-rate environment continue to impact commercial real estate activity. The forecast considers global and domestic impacts from these factors as well as other key economic factors such as changes in unemployment, commodity prices, and the housing market which may impact the Company’s clients. The Company maintains a cautious outlook for economic growth prospects in 2025 and 2026 with the expectation of an elevated interest rate environment and inflation slowly moving back towards the 2% Federal Reserve target rate resulting in an adverse impact on the loan and lease portfolio over the next two years. As a result of geopolitical risk and economic uncertainty, the Company’s future loss estimates may vary considerably from the December 31, 2024 assumptions. Liability for Credit Losses on Unfunded Loan Commitments The liability for credit losses inherent in unfunded loan commitments is included in Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition. The following table shows the changes in the liability for credit losses on unfunded loan commitments for each of the three years ended December 31. (Dollars in thousands) 2024 2023 2022 Balance, beginning of year $ 8,182 $ 5,616 $ 4,196 (Recovery of) provision (1,197) 2,566 1,420 Balance, end of year $ 6,985 $ 8,182 $ 5,616

Lease Investments

Lease Investments	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Lease Investments	Lease Investments As a lessor, the Company’s loan and lease portfolio includes direct finance leases, which are included in Commercial and Agricultural, Renewable Energy, Auto and Light Truck, Medium and Heavy Duty Truck, Aircraft, and Construction Equipment on the Consolidated Statements of Financial Condition. The Company also finances various types of construction equipment, medium and heavy duty trucks, automobiles and other equipment under leases classified as operating leases, which are included in Equipment Owned Under Operating Leases, Net, on the Consolidated Statements of Financial Condition. The following table shows the components of the investment in direct finance and operating leases as of December 31. (Dollars in thousands) 2024 2023 Direct finance leases: Minimum lease payments $ 219,332 $ 247,256 Estimated unguaranteed residual values — — Less: Unearned income (45,064) (57,927) Net investment in direct finance leases $ 174,268 $ 189,329 Operating leases: Gross investment in operating leases $ 23,752 $ 41,368 Accumulated depreciation (12,269) (21,002) Net investment in operating leases $ 11,483 $ 20,366 The following table shows future minimum lease payments due from clients on direct finance and operating leases at December 31, 2024. (Dollars in thousands) Direct Operating Leases 2025 $ 56,371 $ 3,094 2026 41,695 1,836 2027 34,717 930 2028 30,447 388 2029 19,880 33 Thereafter 36,222 — Total $ 219,332 $ 6,281 To mitigate the risk of loss, the Company seeks to diversify both the type of equipment leased and the industries in which the lessees participate. In addition, a portion of the Company’s leases are terminal rental adjustment clause or “TRAC” leases where the lessee effectively guarantees the full residual value through a rental adjustment at the end of term or those where partial value is guaranteed (“split-TRAC”), which has a limited residual risk. Under a split-TRAC structure, the limited residual risk would be satisfied first by the net sale proceeds of the leased asset. The lessee’s at-risk portion, or top risk, is satisfied last and is subject to repayment as additional rent, if the TRAC amount is not satisfied by the net sale proceeds. The carrying amount of residual assets covered by residual value guarantees was $30.57 million and $48.15 million at December 31, 2024 and December 31, 2023, respectively. The following table shows interest income recognized from direct finance lease payments and operating lease equipment rental income and related depreciation expense. (Dollars in thousands) 2024 2023 2022 Direct finance leases: Interest income on lease receivable $ 13,655 $ 13,553 $ 9,008 Operating leases: Income related to lease payments $ 5,171 $ 8,837 $ 12,274 Depreciation expense 4,073 7,093 10,023 Income related to reimbursements from lessees for personal property tax on operating leased equipment for the years ended December 31, 2024, 2023 and 2022 were $0.20 million, $0.27 million and $0.35 million, respectively. Expense related to personal property tax payments on operating leased equipment for the year ended December 31, 2024, 2023 and 2022 were $0.20 million, $0.27 million and $0.35 million, respectively. During the years ended December 31, 2024, 2023, and 2022, the Company recorded impairment charges of $0.00 million, $0.00 million, and $0.06 million, respectively. The impairment charges were recorded as a result of the annual review of operating lease residual values and was recognized in Depreciation — Leased Equipment on the Consolidated Statements of Income.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The following table shows premises and equipment as of December 31. (Dollars in thousands) 2024 2023 Land $ 16,427 $ 15,729 Buildings and improvements 71,325 65,526 Furniture and equipment 43,312 41,897 Total premises and equipment 131,064 123,152 Accumulated depreciation and amortization (77,608) (76,993) Net premises and equipment $ 53,456 $ 46,159 Depreciation and amortization of properties and equipment totaled $4.46 million in 2024, $4.45 million in 2023, and $4.60 million in 2022.

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2024
Transfers and Servicing of Financial Assets [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights The unpaid principal balance of residential mortgage loans serviced for third parties was $777.81 million at December 31, 2024, compared to $806.05 million at December 31, 2023, and $848.96 million at December 31, 2022. Amortization expense on MSRs is expected to total $0.54 million, $0.47 million, $0.40 million, $0.34 million, and $0.29 million in 2025, 2026, 2027, 2028, and 2029, respectively. Projected amortization excludes the impact of future asset additions or disposals. The following table shows changes in the carrying value of MSRs and the associated valuation allowance. (Dollars in thousands) 2024 2023 Mortgage servicing rights: Balance at beginning of year $ 3,670 $ 4,137 Additions 547 378 Amortization (781) (845) Sales — — Carrying value before valuation allowance at end of year 3,436 3,670 Valuation allowance: Balance at beginning of year — — Impairment recoveries — — Balance at end of year $ — $ — Net carrying value of mortgage servicing rights at end of year $ 3,436 $ 3,670 Fair value of mortgage servicing rights at end of year $ 7,480 $ 8,151 At December 31, 2024, the fair value of MSRs exceeded the carrying value reported on the Consolidated Statements of Financial Condition by $4.04 million. This difference represents increases in the fair value of certain MSRs that could not be recorded above cost basis. Funds held in trust at 1st Source for the payment of principal, interest, taxes and insurance premiums applicable to mortgage loans being serviced for others, were approximately $8.45 million and $8.07 million at December 31, 2024 and December 31, 2023, respectively. Mortgage loan contractual servicing fees, including late fees and ancillary income, were $2.40 million, $2.54 million, and $2.79 million for 2024, 2023, and 2022, respectively. Mortgage loan contractual servicing fees are included in Mortgage Banking Income on the Consolidated Statements of Income.

Intangible Assets and Goodwill

Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill At December 31, 2024, intangible assets consisted of goodwill of $83.90 million and other intangible assets of $0.00 million, which was net of accumulated amortization of $0.14 million. At December 31, 2023, intangible assets consisted of goodwill of $83.90 million and other intangible assets of $0.02 million, which was net of accumulated amortization of $0.12 million. Intangible asset amortization was $0.02 million, $0.11 million, and $0.02 million for 2024, 2023, and 2022, respectively. Amortization on other intangible assets is expected to total $0.00 million, $0.00 million, $0.00 million, $0.00 million, and $0.00 million in 2025, 2026, 2027, 2028, and 2029, respectively. The following table shows a summary of other intangible assets as of December 31. (Dollars in thousands) 2024 2023 Other intangibles: Gross carrying amount $ 146 $ 146 Less: accumulated amortization (144) (125) Net carrying amount $ 2 $ 21

Deposits

Deposits	12 Months Ended
	Dec. 31, 2024
Deposits [Abstract]
Deposits	Deposits The aggregate amount of certificates of deposit of $250,000 or more and other time deposits of $250,000 or more outstanding at December 31, 2024 and 2023 was $897.93 million and $953.09 million, respectively. The following table shows the amount of certificates of deposit of $250,000 or more and other time deposits of $250,000 or more outstanding at December 31, 2024, by time remaining until maturity. (Dollars in thousands) Under 3 months $ 242,056 4 – 6 months 213,134 7 – 12 months 222,822 Over 12 months 219,920 Total $ 897,932 The following table shows scheduled maturities of time deposits, including both private and public funds, at December 31, 2024. (Dollars in thousands) 2025 $ 1,509,036 2026 178,270 2027 68,239 2028 33,119 2029 541 Thereafter 520 Total $ 1,789,725

Borrowed Funds and Mandatorily

Borrowed Funds and Mandatorily Redeemable Securities	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Borrowed Funds And Mandatorily Redeemable Securities	Borrowed Funds and Mandatorily Redeemable Securities The following table shows the details of long-term debt and mandatorily redeemable securities as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Federal Home Loan Bank borrowings (1.04%) $ 10,000 $ 20,753 Mandatorily redeemable securities 22,073 21,641 Other long-term debt 7,083 5,517 Total long-term debt and mandatorily redeemable securities $ 39,156 $ 47,911 Annual maturities of long-term debt outstanding at December 31, 2024, for the next five years and thereafter beginning in 2025, are as follows: $2.05 million; $11.94 million; $1.48 million; $0.85 million; $0.69 million; and $22.14 million. At December 31, 2024, the Federal Home Loan Bank borrowings represented a source of funding for community economic development activities, agricultural loans and general funding for the bank and consisted of one fixed rate note maturing in 2026. This note was collateralized by $14.00 million of certain real estate loans. Mandatorily redeemable securities as of December 31, 2024 and 2023, of $22.07 million and $21.64 million, respectively reflected the “book value” shares under the 1st Source Executive Incentive Plan. See Note 16 - Stock Based Compensation (Stock Award Plans) for additional information. Dividends paid on these shares and changes in book value per share are recorded as Other interest expense on the Consolidated Statements of Income. Total interest expense recorded for 2024, 2023, and 2022 was $2.97 million, $3.60 million, and $(0.35) million, respectively. Negative interest expense recognized during 2022 was due to a decrease in book value per share during the year as a result of increased unrealized losses on available-for-sale investment securities within shareholders’ equity during 2022. The following table shows the details of short-term borrowings as of December 31, 2024 and 2023. 2024 2023 (Dollars in thousands) Amount Weighted Average Rate Amount Weighted Average Rate Securities sold under agreements to repurchase $ 72,346 1.15 % $ 55,809 0.37 % Federal Home Loan Bank advances 75,000 4.50 155,000 5.51 Federal Reserve advances 100,000 4.76 100,000 4.83 Other short-term borrowings 1,852 — 1,550 — Total short-term borrowings $ 249,198 3.60 % $ 312,359 4.35 %

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2024
Variable Interest Entities
Variable Interest Entities	Variable Interest Entities A variable interest entity (VIE) is a partnership, limited liability company, trust or other legal entity that meets any one of the following criteria: • The entity does not have sufficient equity to conduct its activities without additional subordinated financial support from another party. • The entity’s investors lack the power to direct the activities that most significantly affect the entity’s economic performance. • The entity’s at-risk holders do not have the obligation to absorb the losses or the right to receive residual returns. • The voting rights of some investors are not proportional to their economic interests in the entity, and substantially all of the entity’s activities involve, or are conducted on behalf of, investors with disproportionately few voting rights. The Company is involved in various entities that are considered to be VIEs. The Company’s investments in VIEs are primarily related to investments promoting affordable housing, community development and renewable energy sources. Some of these tax-advantaged investments support the Company’s regulatory compliance with the Community Reinvestment Act. The Company’s investments in these entities generate a return primarily through the realization of federal and state income tax credits and other tax benefits, such as tax deductions from operating losses of the investments, over specified time periods. These tax credits are recognized as a reduction of tax expense or, for investments qualifying as investment tax credits, as a reduction to the related investment asset. The Company recognized federal and state income tax credits related to its affordable housing and community development tax-advantaged investments in tax expense of $3.19 million, $2.66 million and $2.06 million for the years ended December 31, 2024, 2023 and 2022, respectively. The Company also recognized $22.74 million, $37.23 million and $9.83 million of investment tax credits for the years ended December 31, 2024, 2023 and 2022, respectively. The Company is not required to consolidate VIEs in which it has concluded it does not have a controlling financial interest, and thus is not the primary beneficiary. In such cases, the Company does not have both the power to direct the entities’ most significant activities and the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIEs. As a limited partner in these operating partnerships, the Company is allocated credits and deductions associated with the underlying properties. The Company has determined that it is not the primary beneficiary of these investments because the general partners have the power to direct activities that most significantly influence the economic performance of their respective partnerships. The Company’s investments in these unconsolidated VIEs are carried in Other Assets on the Consolidated Statements of Financial Condition. The Company’s unfunded capital and other commitments related to these unconsolidated VIEs are generally carried in Other Liabilities on the Consolidated Statements of Financial Condition. The Company’s maximum exposure to loss from these unconsolidated VIEs include the investment recorded on the Consolidated Statements of Financial Condition, net of unfunded capital commitments, and previously recorded tax credits which remain subject to recapture by taxing authorities based on compliance features required to be met at the project level. While the Company believes potential losses from these investments are remote, the maximum exposure was determined by assuming a scenario where the community-based business, housing projects and renewable energy projects completely fail and do not meet certain taxing authority compliance requirements resulting in recapture of the related tax credits. The following table provides a summary of investments in affordable housing, community development and renewable energy VIEs that the Company has not consolidated as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Investment carrying amount $ 62,044 $ 79,228 Unfunded capital and other commitments 52,806 80,719 Maximum exposure to loss 74,242 59,649 The Company is required to consolidate VIEs in which it has concluded it has significant involvement in and the ability to direct the activities that impact the entity’s economic performance. The Company is the managing general partner of entities to which it shares interest in tax-advantaged investments with a third party. At December 31, 2024 and 2023, approximately $78.20 million and $87.37 million, respectively, of the Company’s assets and $0.00 million and $0.00 million, respectively, of its liabilities included on the Consolidated Statements of Financial Condition were related to tax-advantaged investment VIEs which the Company has consolidated. The assets of the consolidated VIE are reported in Other Assets, the liabilities are reported in Other Liabilities and the non-controlling interest is reported in Equity on the Consolidated Statements of Financial Condition. The assets of a particular VIE are the primary source of funds to settle its obligations. The creditors of the VIE do not have recourse to the general credit of the Company. The Company’s exposure to the consolidated VIE is generally limited to the carrying value of its variable interest plus any related tax credits previously recognized. Additionally, the Company sponsors one trust, 1st Source Master Trust (Capital Trust), of which 100% of the common equity is owned by the Company. The Capital Trust was formed in 2007 for the purpose of issuing corporation-obligated mandatorily redeemable capital securities (the capital securities) to third-party investors and investing the proceeds from the sale of the capital securities solely in junior subordinated debenture securities of the Company (the subordinated notes). The subordinated notes held by the Capital Trust are the sole assets of the Capital Trust. The Capital Trust qualifies as a variable interest entity for which the Company is not the primary beneficiary and therefore reported in the financial statements as an unconsolidated subsidiary. The junior subordinated debentures are reflected as subordinated notes on the Consolidated Statements of Financial Condition with the corresponding interest distributions reflected as Interest Expense on the Consolidated Statements of Income. The common shares issued by the Capital Trust are included in Other Assets on the Consolidated Statements of Financial Condition. Distributions on the capital securities issued by the Capital Trust are payable quarterly at a rate per annum equal to the interest rate being earned by the Capital Trust on the subordinated notes held by the Capital Trust. The capital securities are subject to mandatory redemption, in whole or in part, upon repayment of the subordinated notes. The Company has entered into agreements which, taken collectively, fully and unconditionally guarantee the capital securities subject to the terms of each of the guarantees. The capital securities held by the Capital Trust qualify as Tier 1 capital under Federal Reserve Board guidelines. The following table shows subordinated notes at December 31, 2024. (Dollars in thousands) Amount of Subordinated Notes Interest Rate Maturity Date June 2007 issuance (1) $ 41,238 7.22 % 6/15/2037 August 2007 issuance (2) 17,526 6.10 % 9/15/2037 Total $ 58,764 (1) Fixed rate through life of debt. (2) 3-Month Term SOFR + the 3-Month tenor spread adjustment + 1.48% through remaining life of debt.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the applicable period, excluding outstanding participating securities. Participating securities include non-vested restricted stock awards. Non-vested restricted stock awards are considered participating securities to the extent the holders of these securities receive non-forfeitable dividends at the same rate as holders of common stock. Diluted earnings per common share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of stock compensation using the treasury stock method. Stock options, where the exercise price was greater than the average market price of the common shares, were excluded from the computation of diluted earnings per common share because the result would have been antidilutive. No stock options were considered antidilutive as of December 31, 2024, 2023 and 2022. The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share for the three years ending December 31. (Dollars in thousands - except per share amounts) 2024 2023 2022 Distributed earnings allocated to common stock $ 34,265 $ 32,001 $ 31,095 Undistributed earnings allocated to common stock 97,130 91,735 88,419 Net earnings allocated to common stock 131,395 123,736 119,514 Net earnings allocated to participating securities 1,228 1,191 995 Net income allocated to common stock and participating securities $ 132,623 $ 124,927 $ 120,509 Weighted average shares outstanding for basic earnings per common share 24,496,148 24,615,546 24,687,324 Dilutive effect of stock compensation — — — Weighted average shares outstanding for diluted earnings per common share 24,496,148 24,615,546 24,687,324 Basic earnings per common share $ 5.36 $ 5.03 $ 4.84 Diluted earnings per common share $ 5.36 $ 5.03 $ 4.84

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The following table presents reclassifications out of accumulated other comprehensive loss related to unrealized losses on available-for-sale securities for the two years ending December 31. (Dollars in thousands) 2024 2023 Affected Line Item in the Realized losses included in net income $ (3,889) $ (2,926) Losses on investment securities available-for-sale (3,889) (2,926) Income before income taxes Tax effect 874 665 Income tax expense Net of tax $ (3,015) $ (2,261) Net income

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans The 1st Source Corporation Employee Stock Ownership and Profit Sharing Plan (as amended, the “Plan”) includes an employee stock ownership component, which is designed to invest in and hold 1st Source common stock, and a 401(k) plan component, which holds all Plan assets not invested in 1st Source common stock. The Plan encourages diversification of investments with opportunities to change investment elections and contribution levels. Employees are eligible to participate in the Plan the first of the month following 90 days of employment. The Company matches dollar for dollar on the first 4% of deferred compensation, plus 50 cents on the dollar of the next 2% deferrals. The Company will also contribute to the Plan an amount designated as a fixed 2% employer contribution. The amount of fixed contribution is equal to two percent of the participant’s eligible compensation. Additionally, each year the Company may, in its sole discretion, make a discretionary profit sharing contribution. As of December 31, 2024 and 2023, there were 699,883 and 707,404 shares, respectively, of 1st Source Corporation common stock held in relation to employee benefit plans. The Company contributions are allocated among the participants on the basis of compensation. Each participant’s account is credited with cash and/or shares of 1st Source common stock based on that participant’s compensation earned during the year. After completing 5 years of service in which they worked at least 1,000 hours per year, a participant will be completely vested in the Company’s contribution. An employee is always 100% vested in their deferral. Plan participants are entitled to receive distributions from their Plan accounts in-service and upon termination of service, retirement, or death.

Stock Based Compensation

Stock Based Compensation	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock Based Compensation	Stock Based Compensation As of December 31, 2024, the Company had four active stock-based employee compensation plans. These plans include three executive stock award plans, the Executive Incentive Plan (EIP), the Restricted Stock Award Plan (RSAP), the Strategic Deployment Incentive Plan (SDP); and the Employee Stock Purchase Plan (ESPP). The 2011 Stock Option Plan was approved by the shareholders on April 21, 2011 but the Company had not made any grants through December 31, 2024. These stock-based employee compensation plans were established to help retain and motivate key employees. All of the plans have been approved by the shareholders of 1st Source Corporation. The Executive Compensation and Human Resources Committee (the “Committee”) of the 1st Source Corporation Board of Directors has sole authority to select the employees, establish the awards to be issued, and approve the terms and conditions of each award under the stock-based compensation plans. Stock-based compensation to employees is recognized as compensation cost on the Consolidated Statements of Income based on their fair values on the measurement date, which, for 1st Source, is the date of grant. Stock-based compensation expense is recognized ratably over the requisite service period for all awards. The total fair value of share awards vested was $4.73 million during 2024, $3.56 million in 2023, and $4.08 million in 2022. The following table shows the combined summary of activity regarding active stock option and stock award plans. Non-Vested Stock Awards Outstanding Shares Available for Grant Number of Shares Weighted-Average Grant-Date Fair Value Balance, January 1, 2022 560,755 274,146 $ 34.86 Shares authorized - 2022 EIP 287,503 — — Granted (127,198) 127,198 40.44 Stock awards vested — (97,640) 34.92 Forfeited 9,131 (15,179) 36.53 Balance, December 31, 2022 730,191 288,525 37.03 Shares authorized - 2023 EIP 87,271 — — Granted (157,485) 157,485 41.75 Stock awards vested — (89,352) 35.14 Forfeited 1,571 (5,411) 37.91 Balance, December 31, 2023 661,548 351,247 39.61 Shares authorized - 2024 EIP 73,669 — — Granted (78,600) 78,600 41.49 Stock awards vested — (104,307) 37.98 Forfeited 9,450 (14,802) 45.52 Balance, December 31, 2024 666,067 310,738 $ 40.35 Stock Option Plans — Incentive stock option plans include the 2011 Stock Option Plan (the “2011 Plan”). Each award from the plan is evidenced by an award agreement that specifies the option price, the duration of the option, the number of shares to which the option pertains, and such other provisions as the Committee determines. The option price is equal to the fair market value of a share of 1st Source Corporation’s common stock on the date of grant. Options granted expire at such time as the Committee determines at the date of grant and in no event does the exercise period exceed a maximum of ten years. Upon merger, consolidation, or other corporate consolidation in which 1st Source Corporation is not the surviving corporation, as defined in the plans, all outstanding options immediately vest. There were zero stock options exercised during 2024, 2023 or 2022. All shares issued in connection with stock option exercises and non-vested stock awards are issued from available treasury stock. No stock-based compensation expense related to stock options was recognized in 2024, 2023 or 2022. The fair value of each option on the date of grant is estimated using the Black-Scholes option pricing model. Expected volatility is based on the historical volatility estimated over a period equal to the expected life of the options. In estimating the fair value of stock options under the Black-Scholes valuation model, separate groups of employees that have similar historical exercise behavior are considered separately. The expected life of the options granted is derived based on past experience and represents the period of time that options granted are expected to be outstanding. Stock Award Plans — Incentive stock award plans include the EIP, the SDP and the RSAP. The EIP is administered by the Committee. Awards under the EIP and SDP include “book value” shares and “market value” shares of common stock. These shares are awarded annually based on weighted performance criteria and generally vest over a period of five years. The EIP book value shares may only be sold to 1st Source and such sale is mandatory in the event of death, retirement, disability, or termination of employment. The RSAP is designed for key employees. Awards under the RSAP are made to employees recommended by the Chief Executive Officer and approved by the Committee. Shares granted under the RSAP vest over a period of up to ten years and vesting is based upon meeting certain various criteria, including continued employment with 1st Source. Stock-based compensation expense relating to the EIP, SDP and RSAP totaled $5.65 million in 2024, $4.89 million in 2023, and $3.59 million in 2022. The total income tax benefit recognized in the accompanying Consolidated Statements of Income related to stock-based compensation was $1.27 million in 2024, $1.11 million in 2023, and $0.83 million in 2022. Unrecognized stock-based compensation expense related to non-vested stock awards (EIP/SDP/RSAP) was $9.43 million at December 31, 2024. At such date, the weighted-average period over which this unrecognized expense was expected to be recognized was 3.11 years. The fair value of non-vested stock awards for the purposes of recognizing stock-based compensation expense is market price of the stock on the measurement date, which, for the Company’s purposes is the date of the award. Employee Stock Purchase Plan — The Company offers an ESPP for substantially all employees with at least two years of service on the effective date of an offering under the plan. Eligible employees may elect to purchase any dollar amount of stock, so long as such amount does not exceed 25% of their base rate of pay and the aggregate stock accrual rate for all offerings does not exceed $25,000 in any calendar year. The purchase price for shares offered is the lower of the closing market bid price for the offering date or the average market bid price for the five business days preceding the offering date. The purchase price and premium/(discount) to the actual market closing price on the offering date for the 2024, 2023, and 2022 offerings were $51.21 0.49%, $41.64 (-0.50%), and $46.78 (-0.34%), respectively. Payment for the stock is made through payroll deductions over the offering period, and employees may discontinue the deductions at any time and exercise the option or take the funds out of the program. The most recent offering began June 1, 2024 and runs through June 2, 2026, with $173,860 in stock value to be purchased at $51.21 per share.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table shows the composition of income tax expense. Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Current: Federal $ 31,826 $ 40,073 $ 38,779 State 4,181 6,135 6,937 Total current 36,007 46,208 45,716 Deferred: Federal 2,044 (7,917) (7,936) State 388 (1,545) (1,525) Total deferred 2,432 (9,462) (9,461) Total provision $ 38,439 $ 36,746 $ 36,255 The following table shows the reasons for the difference between income tax expense and the amount computed by applying the statutory federal income tax rate (21%) to income before income taxes. 2024 2023 2022 Year Ended December 31 (Dollars in thousands) Amount Percent of Pretax Income Amount Percent of Pretax Income Amount Percent of Pretax Income Statutory federal income tax $ 35,922 21.0 % $ 33,953 21.0 % $ 32,925 21.0 % (Decrease) increase in income taxes resulting from: Tax-exempt interest income (465) (0.3) (592) (0.4) (504) (0.3) State taxes, net of federal income tax benefit 3,610 2.1 3,626 2.2 4,275 2.7 Other (628) (0.3) (241) (0.1) (441) (0.3) Total $ 38,439 22.5 % $ 36,746 22.7 % $ 36,255 23.1 % The tax benefit related to losses on investment securities available-for-sale for the years 2024, 2023, and 2022 was approximately $937,000, $720,000, and $39,000, respectively. The following table shows the composition of deferred tax assets and liabilities as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Deferred tax assets: Allowance for credit losses $ 34,738 $ 34,957 Operating lease liability 4,371 4,675 Accruals for employee benefits 4,361 4,103 Tax advantaged partnerships — 1,658 Net unrealized losses on securities available-for-sale 27,153 33,433 Other 1,838 2,405 Total deferred tax assets 72,461 81,231 Deferred tax liabilities: Differing depreciable bases in premises and leased equipment 4,782 5,198 Right of use assets - leases 5,075 5,224 Differing bases in assets related to acquisitions 4,335 4,308 Tax advantaged partnerships 574 — Other 2,152 2,246 Total deferred tax liabilities 16,918 16,976 Net deferred tax asset $ 55,543 $ 64,255 No valuation allowance for deferred tax assets was recorded at December 31, 2024 and 2023 as the Company believes it is more likely than not that all of the deferred tax assets will be realized. Tax years that remain open and subject to audit include the federal 2021-2024 years and the Indiana 2021-2024 years. The Company does not anticipate a significant change in the amount of uncertain tax positions within the next 12 months.

Contingent Liabilities, Commitm

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk	Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk Contingent Liabilities —1st Source and its subsidiaries are defendants in various legal proceedings arising in the normal course of business. In the opinion of management, based upon present information including the advice of legal counsel, the ultimate resolution of these proceedings will not have a material effect on the Company’s consolidated financial position or results of operations. 1st Source Bank sells residential mortgage loans to Fannie Mae as well as FHA-insured, USDA-insured and VA-guaranteed loans in Ginnie Mae mortgage-backed securities. Additionally, the Bank has sold loans on a service released basis to various other financial institutions in the past. The agreements under which the Bank sells these mortgage loans contain various representations and warranties regarding the acceptability of loans for purchase. On occasion, the Bank may be required to indemnify the loan purchaser for credit losses on loans that were later deemed ineligible for purchase or may be required to repurchase a loan. Both circumstances are collectively referred to as “repurchases.” The Company’s liability for repurchases, included in Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition, was $0.12 million and $0.10 million as of December 31, 2024 and 2023, respectively. The mortgage repurchase liability represents the Company’s best estimate of the loss that it may incur. The estimate is based on specific loan repurchase requests and a historical loss ratio with respect to origination dollar volume. Because the level of mortgage loan repurchase losses are dependent on economic factors, investor demand strategies and other external conditions that may change over the life of the underlying loans, the level of liability for mortgage loan repurchase losses is difficult to estimate and requires considerable management judgment. Lease Commitments — The Company and its subsidiaries are obligated under operating leases for certain office premises and equipment. The following table shows operating lease right of use assets and operating lease liabilities as of December 31. (Dollars in thousands) Statement of Financial Condition classification 2024 2023 Operating lease right of use assets Accrued income and other assets $ 21,076 $ 21,692 Operating lease liabilities Accrued expenses and other liabilities $ 18,150 $ 19,413 The following table shows the components of operating leases expense for the year ended December 31. (Dollars in thousands) Statement of Income classification 2024 2023 2022 Operating lease cost Net occupancy expense $ 3,855 $ 3,721 $ 3,527 Short-term lease cost Net occupancy expense — 9 18 Variable lease cost Net occupancy expense 9 8 8 Total operating lease cost $ 3,864 $ 3,738 $ 3,553 The following table shows future minimum rental commitments for all noncancellable operating leases with an initial term longer than 12 months for the next five years and thereafter. (Dollars in thousands) 2025 $ 4,270 2026 3,730 2027 3,028 2028 1,784 2029 1,701 Thereafter 7,468 Total lease payments 21,981 Less: imputed interest (3,831) Present value of operating lease liabilities $ 18,150 The following table shows the weighted average remaining operating lease term, the weighted average discount rate and supplemental Consolidated Statement of Cash Flows information for operating leases at December 31. (Dollars in thousands) 2024 2023 2022 Weighted average remaining lease term 8.94 years 9.31 years 9.33 years Weighted average discount rate 4.34 % 4.28 % 1.85 % Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,509 $ 4,508 $ 4,298 There were no new significant leases that had not yet commenced as of December 31, 2024. Financial Instruments with Off-Balance-Sheet Risk — To meet the financing needs of its clients, 1st Source and its subsidiaries are parties to financial instruments with off-balance-sheet risk in the normal course of business. These off-balance-sheet financial instruments include commitments to originate and sell loans and standby letters of credit. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Statements of Financial Condition. Financial instruments, whose contract amounts represent credit risk as of December 31, were as follows: (Dollars in thousands) 2024 2023 Amounts of commitments: Loan commitments to extend credit $ 1,304,735 $ 1,454,506 Standby letters of credit $ 21,828 $ 17,287 Commercial and similar letters of credit $ 161 $ 7,047 The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instruments for loan commitments and standby letters of credit is represented by the dollar amount of those instruments. The Company uses the same credit policies and collateral requirements in making commitments and conditional obligations as it does for on-balance-sheet instruments. Loan commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company grants mortgage loan commitments to borrowers subject to normal loan underwriting standards. The interest rate risk associated with these loan commitments is managed by entering into contracts for future deliveries of loans. Standby letters of credit are conditional commitments issued to guarantee the performance of a client to a third party. The credit risk involved in and collateral obtained when issuing standby letters of credit are essentially the same as those involved in extending loan commitments to clients. Standby letters of credit generally have terms ranging from two months to one year. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party. Commercial letters of credit generally have terms ranging from two months to six months.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments. See Note 18 for further information. The Company has certain interest rate derivative positions that are not designated as hedging instruments. Derivative assets and liabilities are recorded at fair value on the Consolidated Statements of Financial Condition and do not take into account the effects of master netting agreements. Master netting agreements allow the Company to settle all derivative contracts held with a single counterparty on a net basis, and to offset net derivative positions with related collateral, where applicable. These derivative positions relate to transactions in which the Company enters into an interest rate swap with a client while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, the Company agrees to pay interest to the client on a notional amount at a variable interest rate and receive interest from the client on the same notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows the client to effectively convert a variable rate loan to a fixed rate. Because the terms of the swaps with the customers and the other financial institution offset each other, with the only difference being counterparty credit risk, changes in the fair value of the underlying derivative contracts are not materially different and do not significantly impact the Company’s results of operations. The following table shows the amounts of non-hedging derivative financial instruments at December 31, 2024 and 2023. Asset derivatives Liability derivatives (Dollars in thousands) Notional or contractual amount Statement of Financial Condition classification Fair value Statement of Financial Condition classification Fair value Interest rate swap contracts $ 1,083,673 Other assets $ 16,424 Other liabilities $ 16,727 Loan commitments 3,586 Mortgages held for sale 118 N/A — Forward contracts - mortgage loan 4,500 Mortgages held for sale 17 N/A — Total - December 31, 2024 $ 1,091,759 $ 16,559 $ 16,727 Interest rate swap contracts $ 1,085,618 Other assets $ 22,704 Other liabilities $ 23,140 Loan commitments 2,824 Mortgages held for sale 107 N/A — Forward contracts - mortgage loan 3,500 N/A — Mortgages held for sale 16 Total - December 31, 2023 $ 1,091,942 $ 22,811 $ 23,156 The following table shows the amounts included on the Consolidated Statements of Income for non-hedging derivative financial instruments at December 31, 2024, 2023 and 2022. Gain (loss) (Dollars in thousands) Statement of Income classification 2024 2023 2022 Interest rate swap contracts Other expense $ 133 $ 33 $ (32) Interest rate swap contracts Other income 831 1,310 83 Loan commitments Mortgage banking 11 40 (385) Forward contracts - mortgage loan Mortgage banking 33 (40) 35 Total $ 1,008 $ 1,343 $ (299) The following table shows the offsetting of financial assets and derivative assets at December 31, 2024 and 2023. Gross Amounts Not Offset in the Statement of Financial Condition (Dollars in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Instruments Cash Collateral Received Net Amount December 31, 2024 Interest rate swaps $ 16,424 $ — $ 16,424 $ — $ 12,615 $ 3,809 December 31, 2023 Interest rate swaps $ 22,704 $ — $ 22,704 $ — $ 10,795 $ 11,909 The following table shows the offsetting of financial liabilities and derivative liabilities at December 31, 2024 and 2023. Gross Amounts Not Offset in the Statement of Financial Condition (Dollars in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Instruments Cash Collateral Pledged Net Amount December 31, 2024 Interest rate swaps $ 16,727 $ — $ 16,727 $ — $ — $ 16,727 Repurchase agreements 72,345 — 72,345 72,345 — — Total $ 89,072 $ — $ 89,072 $ 72,345 $ — $ 16,727 December 31, 2023 Interest rate swaps $ 23,140 $ — $ 23,140 $ — $ — $ 23,140 Repurchase agreements 55,809 — 55,809 55,809 — — Total $ 78,949 $ — $ 78,949 $ 55,809 $ — $ 23,140 If a default in performance of any obligation of a repurchase or derivative agreement occurs, each party will set-off property held, or loan indebtedness owing, in respect of transactions against obligations owing in respect of any other transactions. At December 31, 2024 and December 31, 2023, repurchase agreements had a remaining contractual maturity of $72.30 million and $54.46 million in overnight and $0.05 million and $1.35 million in up to 30 days, respectively and were collateralized by U.S. Treasury and Federal agencies securities.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2024
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Matters	Regulatory Matters The Company is subject to various regulatory capital requirements administered by the Federal banking agencies. Failure to meet minimum capital requirements can result in certain mandatory and possible additional discretionary actions by regulators that, if undertaken, could have a material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. Capital amounts and classification are subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios of total capital, Tier 1 capital, and common equity Tier 1 capital to risk-weighted assets and of Tier 1 capital to average assets. The Company believes that it meets all capital adequacy requirements to which it is subject. The most recent notification from the Federal bank regulators categorized 1st Source Bank, the largest of its subsidiaries, as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized” the Bank must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table below. There are no conditions or events since that notification that the Company believes will have changed the institution’s category. As discussed in Note 12, the capital securities held by the Capital Trusts qualify as Tier 1 capital under Federal Reserve Board guidelines. The following table shows the actual and required capital amounts and ratios for 1st Source Corporation and 1st Source Bank as of December 31, 2024 and 2023. Actual Minimum Capital Adequacy Minimum Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio 2024 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 1,345,500 17.08 % $ 630,028 8.00 % $ 826,912 10.50 % $ 787,535 10.00 % 1st Source Bank 1,246,610 15.83 630,034 8.00 826,920 10.50 787,543 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 1,246,267 15.82 472,521 6.00 669,405 8.50 630,028 8.00 1st Source Bank 1,147,376 14.57 472,526 6.00 669,412 8.50 630,034 8.00 Common Equity Tier 1 Capital (to Risk- 1st Source Corporation 1,118,829 14.21 354,391 4.50 551,274 7.00 511,898 6.50 1st Source Bank 1,076,938 13.67 354,394 4.50 551,280 7.00 511,903 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 1,246,267 14.05 354,927 4.00 N/A N/A 443,659 5.00 1st Source Bank 1,147,376 12.93 354,822 4.00 N/A N/A 443,528 5.00 2023 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 1,248,905 16.25 % $ 614,880 8.00 % $ 807,031 10.50 % $ 768,601 10.00 % 1st Source Bank 1,168,672 15.21 614,547 8.00 806,593 10.50 768,184 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 1,152,093 14.99 461,160 6.00 653,311 8.50 614,880 8.00 1st Source Bank 1,071,912 13.95 460,910 6.00 652,956 8.50 614,547 8.00 Common Equity Tier 1 Capital (to Risk- Weighted Assets): 1st Source Corporation 1,016,398 13.22 345,870 4.50 538,020 7.00 499,590 6.50 1st Source Bank 993,217 12.93 345,683 4.50 537,729 7.00 499,319 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 1,152,093 13.26 347,512 4.00 N/A N/A 434,390 5.00 1st Source Bank 1,071,912 12.34 347,397 4.00 N/A N/A 434,246 5.00 The Bank was not required to maintain noninterest bearing cash balances with the Federal Reserve Bank as of December 31, 2024 and 2023. Dividends that may be paid by a subsidiary bank to the parent company are subject to certain legal and regulatory limitations and also may be affected by capital needs, as well as other factors. Due to the Company’s mortgage activities, 1st Source Bank is required to maintain minimum net worth capital requirements established by various governmental agencies. 1st Source Bank’s net worth requirements are governed by the Department of Housing and Urban Development and GNMA. As of December 31, 2024, 1st Source Bank met its minimum net worth capital requirements.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company determines the fair values of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of quoted prices and observable inputs and to minimize the use of unobservable inputs when measuring fair value. The Company elected fair value accounting for mortgages held for sale and for its best-efforts forward sales commitments. The Company economically hedges its mortgages held for sale at the time the interest rate locks are issued to the customers. The Company believes the election for mortgages held for sale will reduce certain timing differences and better match changes in the value of these assets with changes in the value of the derivatives or best-efforts forward sales commitments. At December 31, 2024 and 2023, all mortgages held for sale are carried at fair value. The following table shows the differences between fair value carrying amount of mortgages held for sale measured at fair value and the aggregate unpaid principal amount the Company is contractually entitled to receive at maturity on December 31, 2024 and 2023. (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Excess of fair value carrying amount over (under) unpaid principal December 31, 2024 Mortgages held for sale reported at fair value: Total Loans $ 2,569 $ 2,343 $ 226 (1) December 31, 2023 Mortgages held for sale reported at fair value: Total Loans $ 1,442 $ 1,297 $ 145 (1) (1) The excess of fair value carrying amount over (under) unpaid principal is included in mortgage banking income and includes changes in fair value at and subsequent to funding and gains and losses on the related loan commitment prior to funding. Financial Instruments on Recurring Basis: The following is a description of the valuation methodologies used for financial instruments measured at fair value on a recurring basis: Investment securities available-for-sale are valued primarily by a third-party pricing agent. Prices supplied by the independent pricing agent, as well as their pricing methodologies and assumptions, are reviewed by the Company for reasonableness and to ensure such prices are aligned with market levels. In general, the Company’s investment securities do not possess a complex structure that could introduce greater valuation risk. The portfolio mainly consists of traditional investments including U.S. Treasury and Federal agencies securities, Federal agency mortgage pass-through securities, and general obligation and revenue municipal bonds. Pricing for such instruments is fairly generic and is easily obtained. On a quarterly basis, prices supplied by the pricing agent are validated by comparison to prices obtained from other third party sources for a material portion of the portfolio. The valuation policy and procedures for Level 3 fair value measurements of available-for-sale debt securities are decided through collaboration between management of the Corporate Accounting and Funds Management departments. The changes in fair value measurement for Level 3 securities are analyzed on a periodic basis under a collaborative framework with the aforementioned departments. The methodology and variables used for input are derived from the combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments. Both the market and income valuation approaches are implemented using the following types of inputs: • U.S. treasuries are priced using the market approach and utilizing live data feeds from active market exchanges for identical securities. • Government-sponsored agency debt securities and corporate bonds are primarily priced using available market information through processes such as benchmark curves, market valuations of like securities, sector groupings and matrix pricing. • Other government-sponsored agency securities, mortgage-backed securities and some of the actively traded REMICs and CMOs, are primarily priced using available market information including benchmark yields, prepayment speeds, spreads and volatility of similar securities. • State and political subdivisions are largely grouped by characteristics, i.e., geographical data and source of revenue in trade dissemination systems. Since some securities are not traded daily and due to other grouping limitations, active market quotes are often obtained using benchmarking for like securities. Local direct placement municipal securities, with very little market activity, are priced using an appropriate market yield curve which incorporates a credit spread assumption. Mortgages held for sale and the related loan commitments and forward contracts (economic hedges) are valued by a third party pricing agent. Prices supplied by the independent pricing agent, as well as their pricing methodologies, are reviewed by the Company for reasonableness and to ensure such prices are aligned with market values. On a quarterly basis, prices supplied by the pricing agent are validated by comparison to the prices obtained from other third party sources. Interest rate swap positions, both assets and liabilities, are valued by a third-party pricing agent using an income approach and utilizing models that use as their basis readily observable market parameters. This valuation process considers various factors including interest rate yield curves, time value and volatility factors. Validation of third-party agent valuations is accomplished by comparing those values to the Company’s swap counterparty valuations. Management believes an adjustment is required to “mid-market” valuations for derivatives tied to its performing loan portfolio to recognize the imprecision and related exposure inherent in the process of estimating expected credit losses as well as velocity of deterioration evident with systemic risks embedded in these portfolios. Any change in the mid-market derivative valuation adjustment will be recognized immediately through the Consolidated Statements of Income. The following table shows the balance of assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) Level 1 Level 2 Level 3 Total December 31, 2024 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 446,021 $ 311,728 $ — $ 757,749 U.S. States and political subdivisions securities — 81,600 1,032 82,632 Mortgage-backed securities - Federal agencies — 695,918 — 695,918 Corporate debt securities — — — — Foreign government and other securities — — — — Total debt securities available-for-sale 446,021 1,089,246 1,032 1,536,299 Mortgages held for sale — 2,569 — 2,569 Accrued income and other assets (interest rate swap agreements) — 16,424 — 16,424 Total $ 446,021 $ 1,108,239 $ 1,032 $ 1,555,292 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 16,727 $ — $ 16,727 Total $ — $ 16,727 $ — $ 16,727 December 31, 2023 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 541,461 $ 381,405 $ — $ 922,866 U.S. States and political subdivisions securities — 91,403 1,161 92,564 Mortgage-backed securities - Federal agencies — 598,252 — 598,252 Corporate debt securities — 8,329 — 8,329 Foreign government and other securities — 589 — 589 Total debt securities available-for-sale 541,461 1,079,978 1,161 1,622,600 Mortgages held for sale — 1,442 — 1,442 Accrued income and other assets (interest rate swap agreements) — 22,704 — 22,704 Total $ 541,461 $ 1,104,124 $ 1,161 $ 1,646,746 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 23,140 $ — $ 23,140 Total $ — $ 23,140 $ — $ 23,140 The following table shows the changes in Level 3 assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) U.S. States and political subdivisions securities Beginning balance January 1, 2024 $ 1,161 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income 51 Purchases — Issuances — Sales — Settlements — Maturities (180) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2024 $ 1,032 Beginning balance January 1, 2023 $ 1,464 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income (43) Purchases 3,000 Issuances — Sales — Settlements — Maturities (3,260) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2023 $ 1,161 There were no gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at December 31, 2024 or 2023. The following table shows the valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) Fair value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average December 31, 2024 Debt securities available-for-sale Direct placement municipal securities $ 1,032 Discounted cash flows Credit spread assumption 1.15% - 4.59% 3.96 % December 31, 2023 Debt securities available-for-sale Direct placement municipal securities $ 1,161 Discounted cash flows Credit spread assumption 0.31% - 5.28% 4.28 % Financial Instruments on Non-recurring Basis: The Company may be required, from time to time, to measure certain other financial assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower of cost or market accounting or impairment charges of individual assets. The Credit Policy Committee (CPC), a management committee, is responsible for overseeing the valuation processes and procedures for Level 3 measurements of impaired loans, other real estate and repossessions. The CPC reviews these assets on a quarterly basis to determine the accuracy of the observable inputs, generally third-party appraisals, auction values, values derived from trade publications and data submitted by the borrower, and the appropriateness of the unobservable inputs, generally discounts due to current market conditions and collection issues. The CPC establishes discounts based on asset type and valuation source; deviations from the standard are documented. The discounts are reviewed periodically, annually at a minimum, to determine they remain appropriate. Consideration is given to current trends in market values for the asset categories and gain and losses on sales of similar assets. The Loan and Funds Management Committee of the Board of Directors is responsible for overseeing the CPC. Discounts vary depending on the nature of the assets and the source of value. Aircraft are generally valued using quarterly trade publications adjusted for engine time, condition, maintenance programs, discounted by 10%. Likewise, autos are valued using current auction values, discounted by 10%; medium and heavy duty trucks are valued using trade publications and auction values, discounted by 15%. Construction equipment is generally valued using trade publications and auction values, discounted by 20%. Real estate is valued based on appraisals or evaluations, discounted by 20% at a minimum with higher discounts for property in poor condition or property with characteristics which may make it more difficult to market. Commercial loans subject to borrowing base certificates are generally discounted by 20% for receivables and 40% - 75% for inventory with higher discounts when monthly borrowing base certificates are not required or received. Collateral-dependent impaired loans and related write-downs are based on the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are reviewed quarterly and estimated using customized discounting criteria, appraisals and dealer and trade magazine quotes which are used in a market valuation approach. In accordance with fair value measurements, only impaired loans for which an allowance for loan loss has been established based on the fair value of collateral require classification in the fair value hierarchy. As a result, only a portion of the Company’s impaired loans are classified in the fair value hierarchy. The Company has established MSRs valuation policies and procedures based on industry standards and to ensure valuation methodologies are consistent and verifiable. MSRs and related adjustments to fair value result from application of lower of cost or fair value accounting. For purposes of impairment, MSRs are stratified based on the predominant risk characteristics of the underlying servicing, principally by loan type. The fair value of each tranche of the servicing portfolio is estimated by calculating the present value of estimated future net servicing cash flows, taking into consideration actual and expected mortgage loan prepayment rates, discount rates, servicing costs, and other economic factors. Prepayment rates and discount rates are derived through a third-party pricing agent. Changes in the most significant inputs, including prepayment rates and discount rates, are compared to the changes in the fair value measurements and appropriate resolution is made. A fair value analysis is also obtained from an independent third-party agent and compared to the internal valuation for reasonableness. MSRs do not trade in an active, open market with readily observable prices and though sales of MSRs do occur, precise terms and conditions typically are not readily available and the characteristics of the Company’s servicing portfolio may differ from those of any servicing portfolios that do trade. Other real estate is based on the fair value of the underlying collateral less expected selling costs. Collateral values are estimated primarily using appraisals and reflect a market value approach. Fair values are reviewed quarterly and new appraisals are obtained annually. Repossessions are similarly valued. For assets measured at fair value on a nonrecurring basis the following represents impairment charges (recoveries) recognized on these assets during the year ended December 31, 2024 and 2023, respectively: collateral-dependent impaired loans - $10.43 million and $4.28 million; MSRs - $0.00 million and $0.00 million; repossessions - $0.03 million and $0.00 million, and other real estate - $0.00 million and $0.00 million. The following table shows the carrying value of assets measured at fair value on a non-recurring basis. (Dollars in thousands) Level 1 Level 2 Level 3 Total December 31, 2024 Collateral-dependent impaired loans $ — $ — $ 725 $ 725 Accrued income and other assets (mortgage servicing rights) — — 3,436 3,436 Accrued income and other assets (repossessions) — — 155 155 Accrued income and other assets (other real estate) — — 460 460 Total $ — $ — $ 4,776 $ 4,776 December 31, 2023 Collateral-dependent impaired loans $ — $ — $ 6,289 $ 6,289 Accrued income and other assets (mortgage servicing rights) — — 3,670 3,670 Accrued income and other assets (repossessions) — — 705 705 Accrued income and other assets (other real estate) — — — — Total $ — $ — $ 10,664 $ 10,664 The following table shows the valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a non-recurring basis. (Dollars in thousands) Carrying Value Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average December 31, 2024 Collateral-dependent impaired loans $ 725 $ 725 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 25% - 30% 28.0 % Mortgage servicing rights 3,436 7,480 Discounted cash flows Constant prepayment rate (CPR) 7.6% - 23.0% 7.6 % Discount rate 11.1% - 13.1% 11.3 % Repossessions 155 170 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 10% 9 % Other real estate 460 500 Appraisals Discount for lack of marketability 0% - 8% 8 % December 31, 2023 Collateral-dependent impaired loans $ 6,289 $ 6,289 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 10% - 20% 13.9 % Mortgage servicing rights 3,670 8,151 Discounted cash flows Constant prepayment rate (CPR) 6.1% - 17.6% 7.3 % Discount rate 11.0% - 13.1% 11.2 % Repossessions 705 757 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 10% 8 % Other real estate — — Appraisals Discount for lack of marketability 0% - 0% 0 % GAAP requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring or non-recurring basis. The following table shows the fair values of the Company’s financial instruments. (Dollars in thousands) Carrying or Contract Value Fair Value Level 1 Level 2 Level 3 December 31, 2024 Assets: Cash and due from banks $ 76,837 $ 76,837 $ 76,837 $ — $ — Federal funds sold and interest bearing deposits with other banks 47,989 47,989 47,989 — — Investment securities available-for-sale 1,536,299 1,536,299 446,021 1,089,246 1,032 Other investments 23,855 23,855 23,855 — — Mortgages held for sale 2,569 2,569 — 2,569 — Loans and leases, net of allowance for loan and lease losses 6,699,268 6,608,109 — — 6,608,109 Mortgage servicing rights 3,436 7,480 — — 7,480 Accrued interest receivable 32,790 32,790 — 32,790 — Interest rate swaps 16,424 16,424 — 16,424 — Liabilities: Deposits $ 7,230,035 $ 7,226,239 $ 5,440,309 $ 1,785,930 $ — Short-term borrowings 249,198 249,198 74,198 175,000 — Long-term debt and mandatorily redeemable securities 39,156 38,784 — 38,784 — Subordinated notes 58,764 56,903 — 56,903 — Accrued interest payable 36,494 36,494 — 36,494 — Interest rate swaps 16,727 16,727 — 16,727 — Off-balance-sheet instruments * — 144 — 144 — December 31, 2023 Assets: Cash and due from banks $ 77,474 $ 77,474 $ 77,474 $ — $ — Federal funds sold and interest bearing deposits with other banks 52,194 52,194 52,194 — — Investment securities available-for-sale 1,622,600 1,622,600 541,461 1,079,978 1,161 Other investments 25,075 25,075 25,075 — — Mortgages held for sale 1,442 1,442 — 1,442 — Loans and leases, net of allowance for loan and lease losses 6,370,953 6,204,791 — — 6,204,791 Mortgage servicing rights 3,670 8,151 — — 8,151 Accrued interest receivable 30,232 30,232 — 30,232 — Interest rate swaps 22,704 22,704 — 22,704 — Liabilities: Deposits $ 7,038,581 $ 7,033,549 $ 5,299,896 $ 1,733,653 $ — Short-term borrowings 312,359 312,359 56,013 256,346 — Long-term debt and mandatorily redeemable securities 47,911 47,098 — 47,098 — Subordinated notes 58,764 55,842 — 55,842 — Accrued interest payable 29,520 29,520 — 29,520 — Interest rate swaps 23,140 23,140 — 23,140 — Off-balance-sheet instruments * — 120 — 120 — * Represents estimated cash outflows required to currently settle the obligations at current market rates. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. These estimates are subjective in nature and require considerable judgment to interpret market data. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange, nor are they intended to represent the fair value of the Company as a whole. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. The fair value estimates presented herein are based on pertinent information available to management as of the respective balance sheet date. Although the Company is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued since the presentation dates, and therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. Other significant assets, such as premises and equipment, other assets, and liabilities not defined as financial instruments, are not included in the above disclosures. Also, the fair value estimates for deposits do not include the benefit that results from the low-cost funding provided by the deposit liabilities compared to the cost of borrowing funds in the market.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Segment Reporting Disclosure	Segment Information The Company has one reportable operating segment, commercial banking. While our chief operating decision makers monitor revenue streams of various products and services, the identifiable segments’ operations are managed, and financial performance is evaluated on a company-wide basis. The commercial banking segment provides a broad array of financial products and services including commercial and consumer banking services, trust and wealth advisory services, and insurance to individual and business clients through most of its 77 banking center locations in 18 counties in Indiana and Michigan and Sarasota County in Florida. The accounting policies of the commercial banking segment are the same as those described in Note 1 of the Notes to Consolidated Financial Statements. The chief operating decision makers assess performance for the commercial banking segment and decide how to allocate resources based on net income available to common shareholders which is also reported on the Consolidated Statements of Income as net income available to common shareholders. The measure of segment assets is reported on the Consolidated Statements of Financial Condition as total assets. The chief operating decision makers use net income available to common shareholders to evaluate income generated from segment assets (return on average total assets) in deciding whether to reinvest profits into the commercial banking segment or to pay dividends or fund acquisitions. Net income available to common shareholders is also used by the chief operating decision makers to monitor budget versus actual results. Net income available to common shareholders as well as other common company-wide financial performance and credit quality metrics such as return on average assets, return on average shareholders’ equity, earnings per common share, net interest margin, efficiency ratio, and nonperforming assets to total assets, among others, are used for competitive analysis by benchmarking to the Company’s competitors as well as used in assessing the performance of the segment and for establishing management’s compensation. See the Consolidated Statements of Financial Condition, the Consolidated Statements of Income, the Consolidated Statements of Comprehensive Income (Loss), the Consolidated Statements of Shareholders’ Equity, and the Consolidated Statements of Cash Flows. The Company’s chief operating decision makers are the members of the Strategic Deployment Committee which includes the Chairman of the Board and Chief Executive Officer, the President, the Chief Financial Officer, and several Group/Division Heads that report directly to the Chief Executive Officer or President.

1st Source Corporation (Parent

1st Source Corporation (Parent Company Only) Financial Information	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
1st Source Corporation (Parent Company Only) Financial Information	1st Source Corporation (Parent Company Only) Financial Information STATEMENTS OF FINANCIAL CONDITION December 31 (Dollars in thousands) 2024 2023 ASSETS Cash and cash equivalents $ 126,889 $ 105,889 Short-term investments with bank subsidiary 500 500 Investments in: Bank subsidiaries 1,068,478 965,688 Non-bank subsidiaries 1 1 Right of use assets 12,552 13,895 Other assets 6,500 6,821 Total assets $ 1,214,920 $ 1,092,794 LIABILITIES AND SHAREHOLDERS’ EQUITY Long-term debt and mandatorily redeemable securities $ 29,156 $ 27,158 Subordinated notes 58,764 58,764 Operating lease liability 9,682 11,682 Other liabilities 6,250 5,622 Total liabilities 103,852 103,226 Total shareholders’ equity 1,111,068 989,568 Total liabilities and shareholders’ equity $ 1,214,920 $ 1,092,794 STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Income: Dividends from bank subsidiary $ 55,223 $ 50,152 $ 49,588 Rental income from subsidiaries 1,961 1,832 1,740 Investment securities and other investment gains 124 261 353 Other 307 239 148 Total income 57,615 52,484 51,829 Expenses: Interest on subordinated notes 4,217 4,174 3,550 Interest on long-term debt and mandatorily redeemable securities 3,008 3,606 (341) Interest on commercial paper and other short-term borrowings — 2 1 Occupancy 1,826 1,718 1,625 Other 926 917 890 Total expenses 9,977 10,417 5,725 Income before income tax benefit and equity in undistributed income of subsidiaries 47,638 42,067 46,104 Income tax benefit 1,287 1,246 1,099 Income before equity in undistributed income of subsidiaries 48,925 43,313 47,203 Equity in undistributed income of subsidiaries: Bank subsidiaries 83,693 81,621 73,329 Net income $ 132,618 $ 124,934 $ 120,532 Comprehensive income (loss) $ 151,709 $ 166,301 $ (17,297) STATEMENTS OF CASH FLOWS Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Operating activities: Net income $ 132,618 $ 124,934 $ 120,532 Adjustments to reconcile net income to net cash provided by operating activities: Equity (undistributed) distributed in excess of income of subsidiaries (83,693) (81,621) (73,329) Amortization of right of use assets 1,343 1,354 1,376 Stock-based compensation 142 152 120 Realized/unrealized investment securities and other investment gains (124) (261) (353) Other 1,326 2,863 (702) Net change in operating activities 51,612 47,421 47,644 Investing activities: Net change in partnership investments 260 (246) 102 Net change in investing activities 260 (246) 102 Financing activities: Net change in commercial paper — (3,096) (871) Proceeds from issuance of long-term debt and mandatorily redeemable securities 2,374 1,908 1,862 Payments on long-term debt and mandatorily redeemable securities (1,884) (2,887) (2,708) Stock issued under stock purchase plans 153 78 252 Net proceeds from issuance of treasury stock 4,059 3,576 2,792 Acquisition of treasury stock (178) (12,469) (6,836) Cash dividends paid on common stock (35,396) (33,074) (32,102) Net change in financing activities (30,872) (45,964) (37,611) Net change in cash and cash equivalents 21,000 1,211 10,135 Cash and cash equivalents, beginning of year 105,889 104,678 94,543 Cash and cash equivalents, end of year $ 126,889 $ 105,889 $ 104,678

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Our Board of Directors has delegated primary responsibility for oversight of cybersecurity risk management to the Audit, Finance & Risk Committee of the Board. The Committee receives quarterly reports from the Chief Information Security Officer (CISO) and Chief Risk Officer (CRO), respectively, and reviews them with such officers. These reports are made available to all board members concurrently. The CRO’s report includes evaluation of the level of cybersecurity risks and strength of mitigating controls. All board members are invited to attend the portion of the Committee’s meetings for review of reports received on risk management from management (e.g., the CRO, CISO, Chief Compliance Officer). Our processes for assessing, identifying, and managing material risks from cybersecurity threats are based on examination guidance published by the Federal Financial Institution Examination Council (FFIEC), an interagency body established under the Financial Institutions Regulatory and Interest Rate Control Act of 1978. Consistent with FFIEC guidance, 1st Source selected and adheres to the risk management framework established by the Cybersecurity Risk Institute known as the “CRI Profile.” The CRI Profile is based primarily on the well-known National Institute of Standards and Technology’s (NIST) “Framework for Improving Critical Infrastructure Cybersecurity” and is tailored to ensure expectations of financial institution regulators are met. Our processes are designed to meet standards for all seven CRI Profile functions – governance, identification, detection, protection, response, recovery, and supply chain dependency management. In addition, we adhere to security standards set by the PCI Security Standards Council which are designed to ensure secure payments globally.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Our processes for assessing, identifying, and managing material risks from cybersecurity threats are based on examination guidance published by the Federal Financial Institution Examination Council (FFIEC), an interagency body established under the Financial Institutions Regulatory and Interest Rate Control Act of 1978. Consistent with FFIEC guidance, 1st Source selected and adheres to the risk management framework established by the Cybersecurity Risk Institute known as the “CRI Profile.”
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Our Board and senior management oversee our processes for management of cybersecurity risks consistent with the foregoing standards.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Our Board of Directors has delegated primary responsibility for oversight of cybersecurity risk management to the Audit, Finance & Risk Committee of the Board.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	Before escalation to the Board, issues are generally identified and assessed through our risk governance structure established under our Enterprise Risk Management Program. The risk governance structure includes three distinct components: management oversight, third-party professional assessment, and separate oversight and review by our Internal Audit Department. Management oversight is maintained through several committees that serve as forums for further assessment, remediation, and escalation. These management oversight committees include the Information Security Committee, co-chaired by the CISO and CRO, the Operational and Compliance Risk Committee, chaired by the CFO, vice chaired by the CISO and Chief Compliance Officer, the IT Steering Committee, chaired by the Chief Information Officer (CIO), the Enterprise Risk Management Committee, chaired by the CRO, the Data Governance Committee, chaired by the CIO, and the executive management committee known as the Strategic Deployment Committee, chaired by the CEO.
Cybersecurity Risk Role of Management [Text Block]	Our Board and senior management oversee our processes for management of cybersecurity risks consistent with the foregoing standards. Such oversight includes regular reporting by management to the Board on the adequacy of such processes and potential material issues identified. Before escalation to the Board, issues are generally identified and assessed through our risk governance structure established under our Enterprise Risk Management Program. The risk governance structure includes three distinct components: management oversight, third-party professional assessment, and separate oversight and review by our Internal Audit Department. Management oversight is maintained through several committees that serve as forums for further assessment, remediation, and escalation. These management oversight committees include the Information Security Committee, co-chaired by the CISO and CRO, the Operational and Compliance Risk Committee, chaired by the CFO, vice chaired by the CISO and Chief Compliance Officer, the IT Steering Committee, chaired by the Chief Information Officer (CIO), the Enterprise Risk Management Committee, chaired by the CRO, the Data Governance Committee, chaired by the CIO, and the executive management committee known as the Strategic Deployment Committee, chaired by the CEO. We regularly engage third-party assessors, consultants, and auditors to test and evaluate our controls for managing cybersecurity threats. These include third-party engagements by management and by our Internal Audit Department for (i) regular penetration testing of our cyber defenses, including an annual PCI-certified penetration test, (ii) third-party “health checks” on supporting technology, including our security incident and event management system (SIEM) and vulnerability management program, and (iii) third-party social engineering tests of the effectiveness of our employee training for detection of invasive attempts by malevolent actors. In addition, the Federal Reserve and DFI examine our control environment for managing cybersecurity risks each year. Our risk governance structure includes a Third-Party Risk Management Program with first-level oversight by management’s Third-Party Risk Management Committee and conforms to bank regulatory guidance. This program includes due diligence and periodic monitoring of the information security controls such providers have in place to protect our confidential data received, processed and/or stored by such providers.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	These management oversight committees include the Information Security Committee, co-chaired by the CISO and CRO, the Operational and Compliance Risk Committee, chaired by the CFO, vice chaired by the CISO and Chief Compliance Officer, the IT Steering Committee, chaired by the Chief Information Officer (CIO), the Enterprise Risk Management Committee, chaired by the CRO, the Data Governance Committee, chaired by the CIO, and the executive management committee known as the Strategic Deployment Committee, chaired by the CEO.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	In particular, the CISO has substantial relevant expertise in the financial services industry and formal training in the areas of information security and cybersecurity risk management.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Such oversight includes regular reporting by management to the Board on the adequacy of such processes and potential material issues identified.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Accounting Policies (Policies)

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation — The financial statements consolidate 1st Source, its subsidiaries (principally the Bank) and any variable interest entities (“VIEs”) for which the Company has concluded it has significant involvement in and the ability to direct the activities that impact the entity’s economic performance. All significant intercompany balances and transactions have been eliminated. For purposes of the parent company only financial information presented in Note 23, investments in subsidiaries are carried at equity in the underlying net assets.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements — Financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) require the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
Business Combinations	Business Combinations — Business combinations are accounted for under the purchase method of accounting. Under the purchase method, assets and liabilities of the business acquired are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value of the net tangible and intangible assets acquired recorded as goodwill. Results of operations of the acquired business are included in the income statement from the date of acquisition.
Cash Flows	Cash Flows — For purposes of the consolidated and parent company only statements of cash flows, the Company considers cash and due from banks, federal funds sold and interest bearing deposits with other banks with original maturities of three months or less as cash and cash equivalents.
Securities	Securities — Securities that the Company has the ability and positive intent to hold to maturity are classified as investment securities held-to-maturity. Held-to-maturity investment securities, when present, are carried at amortized cost. As of December 31, 2024 and 2023, the Company held no securities classified as held-to-maturity. Securities that may be sold in response to, or in anticipation of, changes in interest rates and resulting prepayment risk, or for other factors, are classified as available-for-sale and are carried at fair value. Unrealized gains and losses on debt securities are reported, net of applicable taxes, as a separate component of accumulated other comprehensive income (loss) in shareholders’ equity. Unrealized gains and losses on equity securities are reflected, net of applicable taxes, in earnings. For available-for-sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of these criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value in Other Income on the Consolidated Statements of Income. For debt securities that do not meet the aforementioned criteria, the Company evaluates 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, nature of the security, the underlying collateral, and the financial condition of the issuer, among other factors. If this assessment indicates a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for available-for-sale securities losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for available-for-sale securities losses is recognized in other comprehensive income. Changes in the allowance for available-for-sale securities are recorded as a component of credit loss expense. Losses are charged against the allowance for available-for-sale securities losses when management believes the uncollectibility of an available-for-sale security is confirmed or when either criteria regarding intent or requirement to sell is met. Debt and equity securities that are purchased and held principally for the purpose of selling them in the near term are classified as trading account securities and are carried at fair value with unrealized gains and losses reported in earnings. Realized gains and losses on the sales of all securities are reported in earnings and computed using the specific identification cost basis. Other investments consist of shares of Federal Home Loan Bank of Indianapolis (FHLBI) and Federal Reserve Bank stock. As restricted member stocks, these investments are carried at cost. Both cash and stock dividends received on the stocks are reported as income. Quarterly, the Company reviews its investment in FHLBI for impairment. Factors considered in determining impairment are: history of dividend payments; determination of cause for any net loss; adequacy of capital; and review of the most recent financial statements. As of December 31, 2024 and 2023, it was determined that the Company’s investment in FHLBI stock is appropriately valued at cost, which equates to par value. In addition, other investments include interest bearing deposits with other banks with original maturities of greater than three months. These investments are in denominations, including accrued interest, that are fully insured by the FDIC.
Loans and Leases	Loans and Leases — Loans are stated at the principal amount outstanding, net of unamortized deferred loan origination fees and costs and net of unearned income. Interest income is accrued as earned based on unpaid principal balances. Origination fees and direct loan and lease origination costs are deferred, and the net amount amortized to interest income over the estimated life of the related loan or lease. Loan commitment fees are deferred and amortized into other income over the commitment period. Direct financing leases are carried at the aggregate of lease payments plus estimated residual value of the leased property, net of unamortized deferred lease origination fees and costs and unearned income. Only those costs incurred as a direct result of closing a lease transaction are capitalized and all initial direct costs are expensed immediately. Interest income on direct financing leases is recognized over the term of the lease to achieve a constant periodic rate of return on the outstanding investment. Accrued interest is included in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition. The accrual of interest on loans and leases is discontinued when a loan or lease becomes contractually delinquent for 90 days, or when an individual analysis of a borrower’s credit worthiness indicates a credit should be placed on nonperforming status, except for residential mortgage loans and consumer loans that are well secured and in the process of collection. Residential mortgage loans are placed on nonaccrual at the time the loan is placed in foreclosure. When interest accruals are discontinued, interest credited to income in the current year is reversed and interest accrued in the prior year is charged to the allowance for loan and lease losses. However, in some cases, the Company may elect to continue the accrual of interest when the net realizable value of collateral is sufficient to cover the principal and accrued interest. When a loan or lease is classified as nonaccrual and the future collectability of the recorded loan or lease balance is doubtful, collections on interest and principal are applied as a reduction to principal outstanding. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured, which is typically evidenced by a sustained repayment performance of at least six months. Occasionally, the Company modifies loans and leases to borrowers experiencing financial difficulty (typically denoted by internal credit quality graded “substandard” or worse) by providing term extensions, other-than-insignificant payment delays, or interest rate reductions. In some cases, multiple modifications are made to the same loan or lease. These modifications typically result from the Company’s loss mitigation activities. If the Company determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized through an allowance for loan and lease losses estimate or a charge-off to the allowance for loan and lease losses.
Mortgage Banking Activities	Mortgage Banking Activities — Loans held for sale are composed of performing one-to-four family residential mortgage loans originated for resale. Mortgage loans originated with the intent to sell are carried at fair value. The Company recognizes the rights to service mortgage loans for others as separate assets, whether the servicing rights are acquired through a separate purchase or through the sale of originated loans with servicing rights retained. The Company allocates a portion of the total proceeds of a mortgage loan to servicing rights based on the relative fair value. These assets are amortized as reductions of mortgage servicing fee income over the estimated servicing period in proportion to the estimated servicing income to be received. The balance of MSRs is located in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition and the gains and losses on the sale of MSRs are recognized in Noninterest Income on the Consolidated Statements of Income in the period in which such rights are sold. MSRs are evaluated for impairment at each reporting date. For purposes of impairment measurement, MSRs are stratified based on the predominant risk characteristics of the underlying servicing, principally by loan type. If temporary impairment exists within a tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the fair value. If it is later determined all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced through a recovery of income. MSRs are also reviewed for permanent impairment. Permanent impairment exists when recoverability of a recorded valuation allowance is determined to be remote considering historical and projected interest rates, prepayments, and loan pay-off activity. When this situation occurs, the unrecoverable portion of the valuation allowance is applied as a direct write-down to the carrying value of the MSRs. Unlike a valuation allowance, a direct write-down permanently reduces the carrying value of the MSRs and the valuation allowance, precluding subsequent recoveries. As part of mortgage banking operations, the Company enters into commitments to originate loans whereby the interest rate on these loans is determined prior to funding (“rate lock commitments”). Similar to loans held for sale, the fair value of rate lock commitments is subject to change primarily due to changes in interest rates. Under the Company’s risk management policy, these fair values are hedged primarily by selling forward contracts on agency securities at the time the interest rate locks are issued to the customers. The rate lock commitments on mortgage loans intended to be sold and the related hedging instruments are recorded at fair value with changes in fair value recorded in current earnings.
Transfers of Financial Assets	Transfers of Financial Assets
Allowance for Credit Loss	Allowance for Credit Losses: Loans and leases — Accrued interest on loans and leases is excluded from the calculation of the allowance for credit losses due to the Company’s charge-off policy to reverse accrued interest on nonperforming loans against interest income in a timely manner. Expected credit losses on net investments in leases, including any unguaranteed residual asset, are included in the allowance for loan and lease losses. Allowance for Loan and Lease Losses — The allowance for credit losses is established for current expected credit losses on the Company’s loan and lease portfolio. It is the Company’s policy to maintain the allowance at a level believed to be adequate to absorb estimated credit losses within its portfolio of loans and leases. The determination of the allowance requires significant judgment to estimate credit losses measured on a collective pool basis when similar risk characteristics exist, and for loans evaluated individually. In determining the allowance, the Company estimates expected future losses for the loan’s entire contractual term adjusted for expected payments when appropriate. The allowance estimate considers relevant available information, from internal and external sources relating to the historical loss experience, current conditions, and reasonable and supportable forecasts for the Company’s outstanding loan and lease balances. The allowance is an estimation that reflects management’s evaluation of expected losses related to the Company’s financial assets measured at amortized cost. To ensure that the allowance is maintained at an adequate level, a detailed analysis is performed on a quarterly basis and an appropriate provision is made to adjust the allowance. The Company categorizes its loan portfolios into nine segments based on similar risk characteristics. Loans within each segment are collectively evaluated using either: 1) a cohort cumulative loss rate methodology (“cohort”) or, 2) the probability of default (“PD”)/loss given default (“LGD”) methodology (PD/LGD). The cohort methodology is applied to ungraded portfolios, portfolios where receipt of financial statements is generally less timely, and portfolios where there are numerous small dollar accounts that are credit scored. Loans are broken out by internal risk rating (loan grade) bands: 1-6 and 7-12 (special attention). For ungraded portfolios, there is only one pool. The cohort methodology has a steady state assumption; qualitative adjustments capture any differences that may exist between the current and historical conditions. The PD/LGD methodology is applied to graded portfolios due to the quantitative nature of the Company’s risk rating system and is consistent with the Company’s definition of risk, downgrading a credit where and when appropriate and recognizing losses in a timely manner. Loans are broken out by risk rating (loan grade) bands: 1-3, 4-6, 7-8, and 9-12. The amortized cost loan balances (rather than counts) are used for determining the transition and default probabilities. The Company uses risk rating bands as the active state to track the movement of loans through the transition matrix. The transition frequency is quarterly. Default is defined as the point at which a loan is placed on non-accrual status. In addition, a charge-off is assumed to be a default (i.e. a loan goes from accruing to charge-off, without ever being on non-accrual status). The PD is the cumulative probability of default estimated by use of a transition matrix (based on a Markov transition matrix methodology) which captures the migration of a loan from one risk rating band to another. The LGD is the ratio of loss relative to the exposure (amortized cost) at default. The current expected credit loss methodology has a factor for reasonable and supportable forecasts. Generally, reasonable and supportable forecasts are for two years or less and have a reversion period of a similar duration, reverting expected credit losses to a level that is consistent with our historical loss experience. Forecast adjustments are added via basis points for the cohort methodology. For the PD/LGD methodology, adjustments to the probability of default factor are applied through forecast adjustments to the PD factor used as the baseline transition matrix runout, thus impacting the historical loss ratio. The Company developed its reasonable and supportable forecasts using relevant data including, but not limited to, growth in gross domestic product, unemployment rates, housing market trends, commodity prices, inflation, and other factors associated with credit losses on the financial statements. For both the cohort and the PD/LGD methodologies, the Company uses qualitative adjustments to capture differences that may exist between the current and historical conditions. Qualitative factors include but are not limited to current market risk assessment by industry, recent loss experience in particular segments of the portfolios, movement in equipment values collateralizing specialized industry portfolios, concentrations of credit risk, delinquencies, trends in volume, experience and depth of relationship managers and division management, and the effects of changes in lending policies and practices, including changes in quality of the loan and lease origination, servicing and risk management process. Loans which exhibit different risk characteristics than the pool are evaluated individually for potential credit deterioration. Loans evaluated individually are not included in the collective evaluation. These loans can be identified from a variety of sources including delinquency, non-accrual status, and complex or unusual transactions. The scope may include accruing loans that exhibit risk characteristics which differ from their pool or non-performing loans with risk characteristics not similar to other special attention loans in their pool. Individual reserves are determined based on an analysis of the loan’s expected future cash flows, the loan’s observable market value, or the fair value of the collateral less costs to sell. When foreclosure is probable, credit deterioration is determined based on the collateral’s fair value less costs to sell. As a practical expedient, fair value less costs to sell may be used when developing the estimate of credit losses. Similarly, for a going concern analysis, a discounted cash method may be used. Liability for Credit Losses on Unfunded Loan Commitments — The liability for credit losses on commitments to originate loans and standby letters of credit is included in Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition. Expected credit losses are estimated over the contractual period in which the Company is exposed to credit risk via a contractual obligation unless the obligation is unconditionally cancelable by the Company. The liability for credit losses on unfunded loan commitments is adjusted in the Provision for Credit Losses on the Consolidated Statements of Income. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated useful life. Because business processes and credit risks associated with unfunded credit commitments are essentially the same as for loans, the Company utilizes similar processes to estimate its liability for unfunded credit commitments.
Equipment Owned Under Operating Leases	Equipment Owned Under Operating Leases — As a lessor, the Company finances various types of construction equipment, medium and heavy duty trucks, automobiles and other equipment under leases classified as operating leases. The equipment underlying the operating leases is reported at cost, net of accumulated depreciation, on the Consolidated Statements of Financial Condition. These operating lease arrangements require the lessee to make a fixed monthly rental payment over a specified lease term generally ranging from three years to seven years. Revenue consists of the contractual lease payments and is recognized on a straight-line basis over the lease term and reported in Noninterest Income on the Consolidated Statements of Income. Leased assets are depreciated on a straight-line method over the lease term to the estimate of the equipment’s fair market value at lease termination, also referred to as “residual” value. The depreciation of these operating lease assets is reported in Noninterest Expense on the Consolidated Statements of Income. For automobile leases, fair value is based upon published industry market guides. For other equipment leases, fair value may be based upon observable market prices, third-party valuations, or prices received on sales of similar assets at the end of the lease term. These residual values are reviewed annually to ensure the recorded amount does not exceed the fair market value at the lease termination. At the end of the lease, the operating lease asset is either purchased by the lessee or returned to the Company. The Company is responsible for the payment of personal property taxes which is reported in Other Expense on the Consolidated Statements of Income. The lessee is responsible for reimbursing the Company for personal property taxes which is reported in Other Income on the Consolidated Statements of Income. The Company excludes sales taxes and other similar taxes from being reported as lease revenue with an associated expense.
Lease Commitments	Lease Commitments — The Company leases certain banking center locations, office space, land and billboards. In determining whether a contract contains a lease, the Company examines the contract to ensure an asset was specifically identified and that the Company has control of use over the asset. To determine whether a lease is classified as operating or finance, the Company performs an economic life test on all building leases with greater than a twenty years term. Further, the Company performs a fair value test to identify any leases that have a present value of future lease payments over the lease term that is greater than 90% of the fair value of the building. The Company only capitalizes leases with an initial lease liability of $2,000 or greater. At lease inception, the Company determines the lease term by adding together the minimum lease term and all optional renewal periods that it is reasonably certain to renew. The Company determines this on each lease by considering all relevant contract-based, asset-based, market-based, and entity-based economic factors. Generally, the exercise of lease renewal options is at the Company’s sole discretion. The lease term is used to determine whether a lease is operating or finance and is used to calculate straight-line rent expense. Additionally, the depreciable life of leasehold improvements is limited by the expected lease term. Operating lease rentals are expensed on a straight-line basis over the life of the lease beginning on the date the Company takes possession of the property. Rent expense and variable lease costs are included in Net Occupancy Expense on the Consolidated Statements of Income. Included in variable lease costs are leases with rent escalations based on recent financial indices, such as the Consumer Price Index, where the Company initially measures lease payments using the index on the commencement date and records future changes in rent payments resulting from changes in the index to variable costs in the period the changes occur. Certain leases require the Company to pay common area maintenance, real estate taxes, insurance and other operating expenses associated with the leases premises. These expenses are classified in Net Occupancy Expense on the Consolidated Statements of Income, consistent with similar costs for owned locations. There are no residual value guarantees, restrictions or covenants imposed by leases. The Company accounts for lease and nonlease components together as a single lease component by class of underlying asset. Operating lease obligations with an initial term longer than 12 months are recorded with a right of use asset and a lease liability on the Consolidated Statements of Financial Condition. The discount rate used in determining the lease liability and related right of use asset is based upon what would be obtained by the Company for similar loans as an incremental rate as of the date of origination or renewal.
Other Real Estate	Other Real Estate — Other real estate acquired through partial or total satisfaction of nonperforming loans is included in Other Assets on the Consolidated Statements of Financial Condition and recorded at fair value less anticipated selling costs based upon the property’s appraised value at the date of transfer, with any difference between the fair value of the property less cost to sell, and the carrying value of the loan charged to the allowance for loan and lease losses or other income, if a positive adjustment. Subsequent fair value write-downs or write-ups, to the extent of previous write-downs, property maintenance costs, and gains or losses recognized upon the sale of other real estate are recognized in Noninterest Expense on the Consolidated Statements of Income. Gains or losses resulting from the sale of other real estate are recognized on the date of sale. As of December 31, 2024 and 2023, other real estate had carrying values of $0.46 million and $0.00 million, respectively, and is included in Other Assets on the Consolidated Statements of Financial Condition.
Repossessed Assets	Repossessed Assets — Repossessed assets may include fixtures and equipment, inventory and receivables, aircraft, construction equipment, and vehicles acquired from business banking and specialty finance activities. Repossessed assets are included in Other Assets on the Consolidated Statements of Financial Condition at fair value of the equipment or vehicle less estimated selling costs. At the time of repossession, the recorded amount of the loan or lease is written down to the fair value of the equipment or vehicle by a charge to the allowance for loan and lease losses or other income, if a positive adjustment. Subsequent fair value write-downs or write-ups, to the extent of previous write-downs, equipment maintenance costs, and gains or losses recognized upon the sale of repossessions are recognized in Noninterest Expense on the Consolidated Statements of Income. Gains or losses resulting from the sale of repossessed assets are recognized on the date of sale. Repossessed assets totaled $0.16 million and $0.71 million, as of December 31, 2024 and 2023, respectively, and are included in Other Assets on the Consolidated Statements of Financial Condition.
Premises and Equipment	Premises and Equipment — Premises and equipment are stated at cost, less accumulated depreciation and amortization. The provision for depreciation is computed by the straight-line method, primarily with useful lives ranging from three years to 31.5 years. Maintenance and repairs are charged to expense as incurred, while improvements, which extend the useful life, are capitalized and depreciated over the estimated remaining life.
Goodwill and Intangibles	Goodwill and Intangibles — Goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired. Other intangible assets represent purchased assets that also lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Goodwill is reviewed for impairment at least annually or on an interim basis if an event occurs or circumstances change that would more likely than not reduce the carrying amount. Goodwill is allocated into two reporting units. Fair value for each reporting unit is estimated using stock price multiples or earnings before interest, tax, depreciation and amortization (EBITDA) multiples. Intangible assets that have finite lives are amortized over their estimated useful lives and are subject to impairment testing. All of the Company’s other intangible assets have finite lives and are amortized on a straight-line basis over varying periods not exceeding twenty-five years. The Company performed the required annual impairment test of goodwill during the fourth quarter of 2024 and determined that no impairment exists.
Bank-Owned Life Insurance (BOLI)	Bank-Owned Life Insurance (BOLI) — The Company maintains BOLI on certain executives. BOLI balances are recorded at their cash surrender values and are included in Other Assets on the Consolidated Statements of Financial Condition. Changes in the cash surrender values are included in Other Noninterest Income on the Consolidated Statements of Income. At December 31, 2024 and 2023, BOLI totaled $86.40 million and $84.41 million, respectively.
Partnership Investments	Partnership Investments — The Company accounts for its investments in partnerships for which it owns less than fifty percent and has the ability to exercise significant influence over the partnership on the equity method. The Company accounts for its investments in partnerships for which it does not have the ability to exercise significant influence at fair value less impairment, if any, or cost less any impairment if the fair value is not readily determinable. The Company has elected to use the practical expedient to estimate fair value of an investment in an investment company using the net asset value of its partnership interest. The Company uses the hypothetical liquidation book value (HLBV) method for equity investments when the liquidation rights and priorities as defined by an equity investment agreement differ from what is reflected by the underlying percentage ownership interests. The HLBV method is commonly applied to equity investments in the renewable energy industry, where the economic benefits corresponding to an equity investment may vary at different points in time and/or are not directly linked to an investor’s ownership percentage. A calculation is prepared at each balance sheet date to determine the amount that the Company would receive if an equity investment entity were to liquidate all of its assets (as valued in accordance with GAAP) and distribute that cash to the investors based on the contractually defined liquidation priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period, after adjusting for capital contributions and distributions, is 1st Source’s share of the earnings or losses from the equity investment for the period. Investments in partnerships are included in Other Assets on the Consolidated Statements of Financial Condition. The balances as of December 31, 2024 and 2023 were $140.24 million and $166.60 million, respectively.
Short-Term Borrowings	Short-Term Borrowings — Short-term borrowings consist of Federal funds purchased, securities sold under agreements to repurchase, commercial paper, Federal Home Loan Bank advances, borrowings from the Federal Reserve, and borrowings from non-affiliated banks. Federal funds purchased, securities sold under agreements to repurchase, and other short-term borrowings mature within one day to 365 days of the transaction date. Commercial paper matures within seven days to 270 days. Other short-term borrowings on the Consolidated Statements of Financial Condition include the Company’s liability related to mortgage loans available for repurchase under GNMA optional repurchase programs. Securities purchased under agreements to resell and securities sold under agreements to repurchase are treated as collateralized financing transactions and are recorded at the amounts at which the securities were acquired or sold plus accrued interest. The fair value of collateral either received from or provided to a third-party is continually monitored and additional collateral obtained or requested to be returned to the Company as deemed appropriate.
Revenue Recognition	Revenue Recognition — The Company recognizes revenues as they are earned based on contractual terms, as transactions occur, or as services are provided and collectability is reasonably assured. The Company’s principal source of revenue is interest income from loans and leases and investment securities. The Company also earns noninterest income from various banking and financial services offered primarily through 1st Source Bank and its subsidiaries. Interest Income — The largest source of revenue for the Company is interest income which is primarily recognized on an accrual basis according to nondiscretionary formulas in written contracts, such as loan and lease agreements or investment securities contracts. Noninterest Income — The Company earns noninterest income through a variety of financial and transaction services provided to corporate and consumer clients such as trust and wealth advisory, deposit account, debit card, mortgage banking, insurance, and equipment rental services. Revenue is recorded for noninterest income based on the contractual terms for the service or transaction performed. In certain circumstances, noninterest income is reported net of associated expenses.
Trust and Wealth Advisory Fees	Trust and Wealth Advisory Fees — Trust and wealth advisory fees are recognized on the accrual basis.
Income Taxes	Income Taxes — 1st Source and its subsidiaries file a consolidated Federal income tax return. The provision for income taxes is based upon income in the consolidated financial statements, rather than amounts reported on the income tax return. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized as income or expense in the period that includes the enactment date. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, the Company believes it is more likely than not that all of the deferred tax assets will be realized. The Company uses the deferral method of accounting on investments that generate investment tax credits. Under this method, the investment tax credits are recognized as a reduction to the related asset. The expense on certain qualified affordable housing investments is included in Income Tax Expense on the Consolidated Statements of Income. Positions taken in the tax returns may be subject to challenge by the taxing authorities upon examination. Uncertain tax positions are initially recognized in the financial statements when it is more likely than not the position will be sustained upon examination by the tax authorities. Such tax positions are both initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon settlement with the tax authority, assuming full knowledge of the position and all relevant facts. The Company provides for interest and, in some cases, penalties on tax positions that may be challenged by the taxing authorities. Interest expense is recognized beginning in the first period that such interest would begin accruing. Penalties are recognized in the period that the Company claims the position in the tax return. Interest and penalties on income tax uncertainties are classified within Income Tax Expense on the Consolidated Statements of Income.
Treasury Stock	Treasury Stock — Common shares repurchased are recorded at cost. Cost of shares retired or reissued is determined using the first-in, first-out method.
Net Income Per Common Share	Net Income Per Common Share — Earnings per share is computed using the two-class method. Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding, excluding participating securities. Diluted earnings per common share is computed by using the weighted-average number of shares determined for the basic earnings per share calculation plus the dilutive effect of stock compensation using the treasure stock method.
Stock-Based Employee Compensation	Stock-Based Employee Compensation — The Company recognizes stock-based compensation as compensation cost on the Consolidated Statements of Income based on their fair values on the measurement date, which, for its purposes, is the date of grant. The Company recognizes forfeitures as they occur.
Segment Information	Segment Information — 1st Source has one principal business segment, commercial banking. While our chief decision makers monitor the revenue streams of various products and services, the identifiable segments’ operations are managed and financial performance is evaluated on a company-wide basis. Accordingly, all of the Company’s financial service operations are considered to be aggregated in one reportable operating segment. See Note 22 for additional information on segment information.
Derivative Financial Instruments	Derivative Financial Instruments — The Company occasionally enters into derivative financial instruments as part of its interest rate risk management strategies. These derivative financial instruments consist primarily of interest rate swaps. All derivative instruments are recorded on the Consolidated Statements of Financial Condition, as either an asset or liability, at their fair value. The accounting for the gain or loss resulting from the change in fair value depends on the intended use of the derivative. For a derivative used to hedge changes in fair value of a recognized asset or liability, or an unrecognized firm commitment, the gain or loss on the derivative will be recognized in earnings together with the offsetting loss or gain on the hedged item. This results in an earnings impact only to the extent that the hedge is ineffective in achieving offsetting changes in fair value. If it is determined that the derivative instrument is not highly effective as a hedge, hedge accounting is discontinued and the adjustment to fair value of the derivative instrument is recorded in earnings. For a derivative used to hedge changes in cash flows associated with forecasted transactions, the gain or loss on the effective portion of the derivative will be deferred, and reported as accumulated other comprehensive income, a component of shareholders’ equity, until such time the hedged transaction affects earnings. For derivative instruments not accounted for as hedges, changes in fair value are recognized in noninterest income/expense on the Consolidated Statements of Income. Deferred gains and losses from derivatives that are terminated and were in a cash flow hedge are amortized over the shorter of the original remaining term of the derivative or the remaining life of the underlying asset or liability.
Fair Value Measurements	Fair Value Measurements — The Company records certain assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Securities available for sale, mortgage loans held for sale, and derivative instruments are carried at fair value on a recurring basis. Fair value measurements are also utilized to determine the initial value of certain assets and liabilities, to perform impairment assessments, and for disclosure purposes. The Company uses quoted market prices and observable inputs to the maximum extent possible when measuring fair value. In the absence of quoted market prices, various valuation techniques are utilized to measure fair value. When possible, observable market data for identical or similar financial instruments are used in the valuation. When market data is not available, fair value is determined using valuation models that incorporate management’s estimates of the assumptions a market participant would use in pricing the asset or liability. Fair value measurements are classified within one of three levels based on the observability of the inputs used to determine fair value, as follows: Level 1 — The valuation is based on quoted prices in active markets for identical instruments. Level 2 — The valuation is based on observable inputs such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 — The valuation is based on unobservable inputs that are supported by minimal or no market activity and that are significant to the fair value of the instrument. Level 3 valuations are typically performed using pricing models, discounted cash flow methodologies, or similar techniques that incorporate management’s own estimates of assumptions that market participants would use in pricing the instrument, or valuations that require significant management judgment or estimation.
Reclassifications	Reclassifications — Certain amounts in the prior periods consolidation financial statements have been reclassified to conform with the current year presentation. These reclassifications had no effect on total assets, shareholders’ equity or net income as previously reported.

Investment Securities Availab_2

Investment Securities Available-For-Sale (Tables)	12 Months Ended
	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of investment securities available-for-sale	The following table shows investment securities available-for-sale. (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value December 31, 2024 U.S. Treasury and Federal agencies securities $ 786,417 $ 24 $ (28,692) $ 757,749 U.S. States and political subdivisions securities 86,305 33 (3,706) 82,632 Mortgage-backed securities - Federal agencies 777,962 192 (82,236) 695,918 Corporate debt securities — — — — Foreign government securities — — — — Total investment securities available-for-sale $ 1,650,684 $ 249 $ (114,634) $ 1,536,299 December 31, 2023 U.S. Treasury and Federal agencies securities $ 979,530 $ 178 $ (56,842) $ 922,866 U.S. States and political subdivisions securities 97,522 508 (5,466) 92,564 Mortgage-backed securities - Federal agencies 676,257 476 (78,481) 598,252 Corporate debt securities 8,448 — (119) 8,329 Foreign government securities 600 — (11) 589 Total investment securities available-for-sale $ 1,762,357 $ 1,162 $ (140,919) $ 1,622,600
Schedule of contractual maturities of investments in debt securities available-for-sale	The following table shows the contractual maturities of investments in debt securities available-for-sale at December 31, 2024. Expected maturities will differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 253,351 $ 248,772 Due after one year through five years 550,751 523,993 Due after five years through ten years 52,645 52,076 Due after ten years 15,975 15,540 Mortgage-backed securities 777,962 695,918 Total debt securities available-for-sale $ 1,650,684 $ 1,536,299
Schedule of gross unrealized losses and fair value by investment category and age	The following table summarizes gross unrealized losses and fair value by investment category and age. At December 31, 2024, the Company’s available-for-sale securities portfolio consisted of 625 securities, 589 of which were in an unrealized loss position. Less than 12 Months 12 months or Longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses December 31, 2024 U.S. Treasury and Federal agencies securities $ 103,621 $ (1,324) $ 644,614 $ (27,368) $ 748,235 $ (28,692) U.S. States and political subdivisions securities 37,017 (670) 39,280 (3,036) 76,297 (3,706) Mortgage-backed securities - Federal agencies 191,779 (3,355) 466,204 (78,881) 657,983 (82,236) Corporate debt securities — — — — — — Foreign government securities — — — — — — Total debt securities available-for-sale $ 332,417 $ (5,349) $ 1,150,098 $ (109,285) $ 1,482,515 $ (114,634) December 31, 2023 U.S. Treasury and Federal agencies securities $ — $ — $ 913,417 $ (56,842) $ 913,417 $ (56,842) U.S. States and political subdivisions securities 1,251 (2) 69,747 (5,464) 70,998 (5,466) Mortgage-backed securities - Federal agencies 8,553 (98) 550,748 (78,383) 559,301 (78,481) Corporate debt securities — — 8,329 (119) 8,329 (119) Foreign government securities — — 589 (11) 589 (11) Total debt securities available-for-sale $ 9,804 $ (100) $ 1,542,830 $ (140,819) $ 1,552,634 $ (140,919)
Schedule of gross realized gains and losses from securities available-for-sale portfolio	The following table shows the gross realized gains and losses from the available-for-sale debt securities portfolio. Realized gains and losses of all securities are computed using the specific identification cost basis. (Dollars in thousands) 2024 2023 2022 Gross realized gains $ — $ 733 $ — Gross realized losses (3,889) (3,659) (184) Net realized (losses) gains $ (3,889) $ (2,926) $ (184)

Loan and Lease Financings (Tabl

Loan and Lease Financings (Tables)	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
Schedule of amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination	The following table shows the amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination as of December 31, 2024. Term Loans and Leases by Origination Year (Dollars in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 136,888 $ 115,508 $ 66,696 $ 36,315 $ 19,677 $ 18,369 $ 331,282 $ — $ 724,735 Grades 7-12 438 4,079 7,769 2,426 194 2,325 31,008 — 48,239 Total commercial and agricultural 137,326 119,587 74,465 38,741 19,871 20,694 362,290 — 772,974 Current period gross charge-offs — 276 117 550 — — 8,882 — 9,825 Renewable energy Grades 1-6 150,951 145,126 22,110 70,606 22,329 76,144 — — 487,266 Grades 7-12 — — — — — — — — — Total renewable energy 150,951 145,126 22,110 70,606 22,329 76,144 — — 487,266 Current period gross charge-offs — — — — — — — — — Auto and light truck Grades 1-6 443,033 276,295 106,199 25,535 10,018 6,677 — — 867,757 Grades 7-12 26,131 48,319 4,754 99 1,210 165 — — 80,678 Total auto and light truck 469,164 324,614 110,953 25,634 11,228 6,842 — — 948,435 Current period gross charge-offs — 165 448 6 — 111 — — 730 Medium and heavy duty truck Grades 1-6 88,395 72,816 81,238 25,726 11,298 5,493 — — 284,966 Grades 7-12 — 1,524 1,623 690 — 13 — 807 4,657 Total medium and heavy duty truck 88,395 74,340 82,861 26,416 11,298 5,506 — 807 289,623 Current period gross charge-offs — — — — — — — — — Aircraft Grades 1-6 347,099 190,776 285,677 151,194 82,208 32,326 7,773 — 1,097,053 Grades 7-12 2,882 7,704 10,920 1,846 3,392 — — — 26,744 Total aircraft 349,981 198,480 296,597 153,040 85,600 32,326 7,773 — 1,123,797 Current period gross charge-offs — — — 15 — 53 — — 68 Construction equipment Grades 1-6 488,870 325,443 208,114 70,258 33,095 10,890 25,916 1,966 1,164,552 Grades 7-12 2,716 10,650 11,686 1,679 12,629 — — — 39,360 Total construction equipment 491,586 336,093 219,800 71,937 45,724 10,890 25,916 1,966 1,203,912 Current period gross charge-offs 46 989 390 267 — — — — 1,692 Commercial real estate Grades 1-6 258,988 303,717 237,103 126,129 82,249 177,798 264 — 1,186,248 Grades 7-12 145 14,580 5,846 6,386 27 2,033 — — 29,017 Total commercial real estate 259,133 318,297 242,949 132,515 82,276 179,831 264 — 1,215,265 Current period gross charge-offs — — — — — — — — — Residential real estate and home equity Performing 87,045 69,439 94,441 81,345 79,575 85,333 173,876 6,210 677,264 Nonperforming — 171 624 346 103 340 1,138 85 2,807 Total residential real estate and home equity 87,045 69,610 95,065 81,691 79,678 85,673 175,014 6,295 680,071 Current period gross charge-offs — 3 — 32 — — 30 1 66 Consumer Performing 43,692 33,063 28,594 10,092 2,398 983 13,823 — 132,645 Nonperforming 22 352 336 57 33 20 — — 820 Total consumer 43,714 33,415 28,930 10,149 2,431 1,003 13,823 — 133,465 Current period gross charge-offs $ 565 $ 230 $ 276 $ 118 $ 16 $ 22 $ 122 $ — $ 1,349 The following table shows the amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination as of December 31, 2023. Term Loans and Leases by Origination Year (Dollars in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 155,656 $ 124,717 $ 68,473 $ 39,708 $ 18,658 $ 15,856 $ 299,495 $ — $ 722,563 Grades 7-12 7,502 2,657 4,886 501 293 418 27,403 — 43,660 Total commercial and agricultural 163,158 127,374 73,359 40,209 18,951 16,274 326,898 — 766,223 Current period gross charge-offs 668 499 15 17 4 — 3,102 — 4,305 Renewable energy Grades 1-6 177,364 23,679 86,836 29,138 56,935 25,756 — — 399,708 Grades 7-12 — — — — — — — — — Total renewable energy 177,364 23,679 86,836 29,138 56,935 25,756 — — 399,708 Current period gross charge-offs — — — — — — — — — Auto and light truck Grades 1-6 603,406 248,701 64,182 24,986 13,573 5,287 — — 960,135 Grades 7-12 908 1,848 474 2,490 632 425 — — 6,777 Total auto and light truck 604,314 250,549 64,656 27,476 14,205 5,712 — — 966,912 Current period gross charge-offs 126 360 128 33 19 63 — — 729 Medium and heavy duty truck Grades 1-6 96,254 114,490 44,069 24,645 15,264 4,202 — — 298,924 Grades 7-12 3,565 7,010 1,675 — 773 — — — 13,023 Total medium and heavy duty truck 99,819 121,500 45,744 24,645 16,037 4,202 — — 311,947 Current period gross charge-offs — — — — — — — — — Aircraft Grades 1-6 269,635 355,175 197,579 140,744 37,244 36,936 6,420 — 1,043,733 Grades 7-12 10,120 9,475 3,704 4,543 — 6,597 — — 34,439 Total aircraft 279,755 364,650 201,283 145,287 37,244 43,533 6,420 — 1,078,172 Current period gross charge-offs — — — — — — — — — Construction equipment Grades 1-6 459,884 333,008 131,838 64,998 29,543 7,803 26,044 2,346 1,055,464 Grades 7-12 6,915 20,826 1,037 510 — — — — 29,288 Total construction equipment 466,799 353,834 132,875 65,508 29,543 7,803 26,044 2,346 1,084,752 Current period gross charge-offs — 44 10 — — — — — 54 Commercial real estate Grades 1-6 336,287 251,055 148,597 105,282 86,452 187,306 275 — 1,115,254 Grades 7-12 678 5,313 2,576 651 4,372 1,017 — — 14,607 Total commercial real estate 336,965 256,368 151,173 105,933 90,824 188,323 275 — 1,129,861 Current period gross charge-offs — 39 30 — 179 — — — 248 Residential real estate and home equity Performing 87,767 110,058 89,458 88,232 30,681 72,211 152,037 5,575 636,019 Nonperforming — 107 74 — 414 756 536 67 1,954 Total residential real estate and home equity 87,767 110,165 89,532 88,232 31,095 72,967 152,573 5,642 637,973 Current period gross charge-offs — — — — — 54 39 8 101 Consumer Performing 53,023 47,789 19,739 6,286 2,539 1,021 12,063 — 142,460 Nonperforming 63 246 123 31 28 6 — — 497 Total consumer 53,086 48,035 19,862 6,317 2,567 1,027 12,063 — 142,957 Current period gross charge-offs $ 541 $ 455 $ 138 $ 28 $ 17 $ 3 $ 29 $ — $ 1,211
Schedule of amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status	The following table shows the amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status. (Dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due and Accruing Total Accruing Loans Nonaccrual Total Financing Receivables December 31, 2024 Commercial and agricultural $ 767,942 $ 275 $ 42 $ — $ 768,259 $ 4,715 $ 772,974 Renewable energy 487,266 — — — 487,266 — 487,266 Auto and light truck 943,403 2,226 — — 945,629 2,806 948,435 Medium and heavy duty truck 289,623 — — — 289,623 — 289,623 Aircraft 1,123,797 — — — 1,123,797 — 1,123,797 Construction equipment 1,185,936 — — — 1,185,936 17,976 1,203,912 Commercial real estate 1,203,967 9,703 — — 1,213,670 1,595 1,215,265 Residential real estate and home equity 675,669 1,010 585 96 677,360 2,711 680,071 Consumer 131,585 852 208 10 132,655 810 133,465 Total $ 6,809,188 $ 14,066 $ 835 $ 106 $ 6,824,195 $ 30,613 $ 6,854,808 December 31, 2023 Commercial and agricultural $ 752,947 $ 9 $ — $ — $ 752,956 $ 13,267 $ 766,223 Renewable energy 399,708 — — — 399,708 — 399,708 Auto and light truck 962,226 20 — — 962,246 4,666 966,912 Medium and heavy duty truck 311,915 32 — — 311,947 — 311,947 Aircraft 1,069,830 8,113 229 — 1,078,172 — 1,078,172 Construction equipment 1,078,912 2,044 3,620 — 1,084,576 176 1,084,752 Commercial real estate 1,126,806 — 85 — 1,126,891 2,970 1,129,861 Residential real estate and home equity 634,345 1,623 51 142 636,161 1,812 637,973 Consumer 141,489 864 107 7 142,467 490 142,957 Total $ 6,478,178 $ 12,705 $ 4,092 $ 149 $ 6,495,124 $ 23,381 $ 6,518,505
Schedule of amortized cost of loans and leases that were both experiencing financial difficulty and modified, segregated by portfolio segment and type of modification.	The following table shows the amortized cost of loans and leases over $250,000 at December 31, 2024 and 2023, respectively, that were both experiencing financial difficulty and modified during the twelve months ended December 31, 2024 and 2023, respectively, segregated by portfolio segment and type of modification. The percentage of the amortized cost of loans and leases that were modified to borrowers in financial distress as compared to the amortized cost of each segment of financial receivable is also presented below. (Dollars in thousands) Payment Term Interest Combination % of Total December 31, 2024 Commercial and agricultural $ 1,052 $ — $ — $ — 0.14 % Auto and light truck — — — 40,150 4.23 Medium and heavy duty truck — — — 3,017 1.04 Commercial real estate 988 — — — 0.08 Total $ 2,040 $ — $ — $ 43,167 0.66 % December 31, 2023 Commercial and agricultural $ 3,016 $ — $ — $ 1,537 0.59 % Medium and heavy duty truck — — — 11,050 3.54 Construction equipment — 1,496 — — 0.14 Commercial real estate 288 — 426 — 0.06 Total $ 3,304 $ 1,496 $ 426 $ 12,587 0.27 %
Schedule of amortized cost of loans and leases that were both experiencing financial difficulty and modified, with delinquency status.	The Company closely monitors the performance of loans and leases that have been modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table shows the performance of such loans and leases that have been modified during the twelve months ended December 31, 2024 and December 31, 2023, respectively. (Dollars in thousands) Current 30-59 60-89 90 Days or Total December 31, 2024 Commercial and agricultural $ 1,052 $ — $ — $ — $ — Auto and light truck 39,664 — 486 — 486 Medium and heavy duty truck 3,017 — — — — Commercial real estate 988 — — — — Total $ 44,721 $ — $ 486 $ — $ 486 December 31, 2023 Commercial and agricultural $ 1,706 $ — $ — $ 2,847 $ 2,847 Medium and heavy duty truck 11,050 — — — $ — Construction equipment 1,496 — — — $ — Commercial real estate 426 288 — — $ 288 Total $ 14,678 $ 288 $ — $ 2,847 $ 3,135
Schedule of the financial effect of loan and lease modifications to borrowers experiencing difficulties.	The following table shows the financial effect of loan and lease modifications presented above to borrowers experiencing financial difficulty for the twelve months ended December 31, 2024 and December 31, 2023, respectively. Weighted- Weighted- Weighted- Average Payment Delay (in months) Combination Weighted-Average Payment Delay and Term Extension (in months) December 31, 2024 Commercial and agricultural — % 0 6 0 Auto and light truck — % 0 0 3 Medium and heavy duty truck — % 0 0 4 Commercial real estate — % 0 6 0 Total — % 0 6 3 December 31, 2023 Commercial and agricultural — % 3 6 30 Medium and heavy duty truck — % 0 0 6 Construction equipment — % 5 0 0 Commercial real estate 3.00 % 0 3 0 Total 3.00 % 4 6 10

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Schedule of changes in allowance for loan and lease losses, segregated by class	The following table shows the changes in the allowance for loan and lease losses, segregated by portfolio segment, for each of the three years ended December 31. (Dollars in thousands) Commercial and agricultural Renewable energy Auto and light truck Medium Aircraft Construction equipment Commercial real estate Residential real estate and home equity Consumer Total 2024 Balance, beginning of year $ 17,385 $ 6,610 $ 16,858 $ 8,965 $ 37,653 $ 26,510 $ 23,690 $ 7,698 $ 2,183 $ 147,552 Charge-offs 9,825 — 730 — 68 1,692 — 66 1,349 13,730 Recoveries 418 — 3,273 — 1,279 2,100 724 26 235 8,055 Net charge-offs (recoveries) 9,407 — (2,543) — (1,211) (408) (724) 40 1,114 5,675 Provision (recovery of provision) 13,338 1,952 (964) (1,673) (2,201) 1,340 407 318 1,146 13,663 Balance, end of year $ 21,316 $ 8,562 $ 18,437 $ 7,292 $ 36,663 $ 28,258 $ 24,821 $ 7,976 $ 2,215 $ 155,540 2023 Balance, beginning of year $ 14,635 $ 7,217 $ 18,634 $ 7,566 $ 41,093 $ 24,039 $ 17,431 $ 6,478 $ 2,175 $ 139,268 Charge-offs 4,305 — 729 — — 54 248 101 1,211 6,648 Recoveries 243 — 5,591 12 967 1,656 11 334 252 9,066 Net charge-offs (recoveries) 4,062 — (4,862) (12) (967) (1,602) 237 (233) 959 (2,418) Provision (recovery of provision) 6,812 (607) (6,638) 1,387 (4,407) 869 6,496 987 967 5,866 Balance, end of year $ 17,385 $ 6,610 $ 16,858 $ 8,965 $ 37,653 $ 26,510 $ 23,690 $ 7,698 $ 2,183 $ 147,552 2022 Balance, beginning of year $ 15,409 $ 6,585 $ 19,624 $ 6,015 $ 33,628 $ 19,673 $ 19,691 $ 5,084 $ 1,783 $ 127,492 Charge-offs 625 — 118 — — 1,114 538 284 730 3,409 Recoveries 56 — 417 — 785 17 45 160 460 1,940 Net charge-offs (recoveries) 569 — (299) — (785) 1,097 493 124 270 1,469 Provision (recovery of provision) (205) 632 (1,289) 1,551 6,680 5,463 (1,767) 1,518 662 13,245 Balance, end of year $ 14,635 $ 7,217 $ 18,634 $ 7,566 $ 41,093 $ 24,039 $ 17,431 $ 6,478 $ 2,175 $ 139,268
Schedule of changes in allowance for credit losses on unfunded loan commitments	The following table shows the changes in the liability for credit losses on unfunded loan commitments for each of the three years ended December 31. (Dollars in thousands) 2024 2023 2022 Balance, beginning of year $ 8,182 $ 5,616 $ 4,196 (Recovery of) provision (1,197) 2,566 1,420 Balance, end of year $ 6,985 $ 8,182 $ 5,616

Lease Investments (Tables)

Lease Investments (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Schedule of components of lease investments by category	The following table shows the components of the investment in direct finance and operating leases as of December 31. (Dollars in thousands) 2024 2023 Direct finance leases: Minimum lease payments $ 219,332 $ 247,256 Estimated unguaranteed residual values — — Less: Unearned income (45,064) (57,927) Net investment in direct finance leases $ 174,268 $ 189,329 Operating leases: Gross investment in operating leases $ 23,752 $ 41,368 Accumulated depreciation (12,269) (21,002) Net investment in operating leases $ 11,483 $ 20,366
Minimum future lease payments due from clients	The following table shows future minimum lease payments due from clients on direct finance and operating leases at December 31, 2024. (Dollars in thousands) Direct Operating Leases 2025 $ 56,371 $ 3,094 2026 41,695 1,836 2027 34,717 930 2028 30,447 388 2029 19,880 33 Thereafter 36,222 — Total $ 219,332 $ 6,281
Schedule of the components of income from direct finance and operating lease equipment	The following table shows interest income recognized from direct finance lease payments and operating lease equipment rental income and related depreciation expense. (Dollars in thousands) 2024 2023 2022 Direct finance leases: Interest income on lease receivable $ 13,655 $ 13,553 $ 9,008 Operating leases: Income related to lease payments $ 5,171 $ 8,837 $ 12,274 Depreciation expense 4,073 7,093 10,023

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	The following table shows premises and equipment as of December 31. (Dollars in thousands) 2024 2023 Land $ 16,427 $ 15,729 Buildings and improvements 71,325 65,526 Furniture and equipment 43,312 41,897 Total premises and equipment 131,064 123,152 Accumulated depreciation and amortization (77,608) (76,993) Net premises and equipment $ 53,456 $ 46,159

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2024
Transfers and Servicing of Financial Assets [Abstract]
Schedule of changes in carrying value of mortgage servicing rights and the associated valuation allowance	The following table shows changes in the carrying value of MSRs and the associated valuation allowance. (Dollars in thousands) 2024 2023 Mortgage servicing rights: Balance at beginning of year $ 3,670 $ 4,137 Additions 547 378 Amortization (781) (845) Sales — — Carrying value before valuation allowance at end of year 3,436 3,670 Valuation allowance: Balance at beginning of year — — Impairment recoveries — — Balance at end of year $ — $ — Net carrying value of mortgage servicing rights at end of year $ 3,436 $ 3,670 Fair value of mortgage servicing rights at end of year $ 7,480 $ 8,151

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of core deposit intangible and other intangible assets	The following table shows a summary of other intangible assets as of December 31. (Dollars in thousands) 2024 2023 Other intangibles: Gross carrying amount $ 146 $ 146 Less: accumulated amortization (144) (125) Net carrying amount $ 2 $ 21

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2024
Deposits [Abstract]
Schedule of certificates of deposit of $250,000 or more and other time deposits of $250,000 or more by time remaining until maturity	The following table shows the amount of certificates of deposit of $250,000 or more and other time deposits of $250,000 or more outstanding at December 31, 2024, by time remaining until maturity. (Dollars in thousands) Under 3 months $ 242,056 4 – 6 months 213,134 7 – 12 months 222,822 Over 12 months 219,920 Total $ 897,932
Schedule of maturities of time deposits, including both private and public funds	The following table shows scheduled maturities of time deposits, including both private and public funds, at December 31, 2024. (Dollars in thousands) 2025 $ 1,509,036 2026 178,270 2027 68,239 2028 33,119 2029 541 Thereafter 520 Total $ 1,789,725

Borrowed Funds and Mandatoril_2

Borrowed Funds and Mandatorily Redeemable Securities (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of long-term debt and mandatorily redeemable securities	The following table shows the details of long-term debt and mandatorily redeemable securities as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Federal Home Loan Bank borrowings (1.04%) $ 10,000 $ 20,753 Mandatorily redeemable securities 22,073 21,641 Other long-term debt 7,083 5,517 Total long-term debt and mandatorily redeemable securities $ 39,156 $ 47,911
Schedule of short-term borrowings	The following table shows the details of short-term borrowings as of December 31, 2024 and 2023. 2024 2023 (Dollars in thousands) Amount Weighted Average Rate Amount Weighted Average Rate Securities sold under agreements to repurchase $ 72,346 1.15 % $ 55,809 0.37 % Federal Home Loan Bank advances 75,000 4.50 155,000 5.51 Federal Reserve advances 100,000 4.76 100,000 4.83 Other short-term borrowings 1,852 — 1,550 — Total short-term borrowings $ 249,198 3.60 % $ 312,359 4.35 %

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2024
Variable Interest Entities
Schedule of unconsolidated variable interest entities	The following table provides a summary of investments in affordable housing, community development and renewable energy VIEs that the Company has not consolidated as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Investment carrying amount $ 62,044 $ 79,228 Unfunded capital and other commitments 52,806 80,719 Maximum exposure to loss 74,242 59,649
Summary of subordinated notes	The following table shows subordinated notes at December 31, 2024. (Dollars in thousands) Amount of Subordinated Notes Interest Rate Maturity Date June 2007 issuance (1) $ 41,238 7.22 % 6/15/2037 August 2007 issuance (2) 17,526 6.10 % 9/15/2037 Total $ 58,764 (1) Fixed rate through life of debt. (2) 3-Month Term SOFR + the 3-Month tenor spread adjustment + 1.48% through remaining life of debt.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Schedule of reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share	The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share for the three years ending December 31. (Dollars in thousands - except per share amounts) 2024 2023 2022 Distributed earnings allocated to common stock $ 34,265 $ 32,001 $ 31,095 Undistributed earnings allocated to common stock 97,130 91,735 88,419 Net earnings allocated to common stock 131,395 123,736 119,514 Net earnings allocated to participating securities 1,228 1,191 995 Net income allocated to common stock and participating securities $ 132,623 $ 124,927 $ 120,509 Weighted average shares outstanding for basic earnings per common share 24,496,148 24,615,546 24,687,324 Dilutive effect of stock compensation — — — Weighted average shares outstanding for diluted earnings per common share 24,496,148 24,615,546 24,687,324 Basic earnings per common share $ 5.36 $ 5.03 $ 4.84 Diluted earnings per common share $ 5.36 $ 5.03 $ 4.84

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of reclassifications out of accumulated other comprehensive income	Accumulated Other Comprehensive Loss The following table presents reclassifications out of accumulated other comprehensive loss related to unrealized losses on available-for-sale securities for the two years ending December 31. (Dollars in thousands) 2024 2023 Affected Line Item in the Realized losses included in net income $ (3,889) $ (2,926) Losses on investment securities available-for-sale (3,889) (2,926) Income before income taxes Tax effect 874 665 Income tax expense Net of tax $ (3,015) $ (2,261) Net income

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Summary of activity regarding active stock option and stock award plans	The following table shows the combined summary of activity regarding active stock option and stock award plans. Non-Vested Stock Awards Outstanding Shares Available for Grant Number of Shares Weighted-Average Grant-Date Fair Value Balance, January 1, 2022 560,755 274,146 $ 34.86 Shares authorized - 2022 EIP 287,503 — — Granted (127,198) 127,198 40.44 Stock awards vested — (97,640) 34.92 Forfeited 9,131 (15,179) 36.53 Balance, December 31, 2022 730,191 288,525 37.03 Shares authorized - 2023 EIP 87,271 — — Granted (157,485) 157,485 41.75 Stock awards vested — (89,352) 35.14 Forfeited 1,571 (5,411) 37.91 Balance, December 31, 2023 661,548 351,247 39.61 Shares authorized - 2024 EIP 73,669 — — Granted (78,600) 78,600 41.49 Stock awards vested — (104,307) 37.98 Forfeited 9,450 (14,802) 45.52 Balance, December 31, 2024 666,067 310,738 $ 40.35

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of income tax expense	The following table shows the composition of income tax expense. Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Current: Federal $ 31,826 $ 40,073 $ 38,779 State 4,181 6,135 6,937 Total current 36,007 46,208 45,716 Deferred: Federal 2,044 (7,917) (7,936) State 388 (1,545) (1,525) Total deferred 2,432 (9,462) (9,461) Total provision $ 38,439 $ 36,746 $ 36,255
Schedule of reasons for the difference between income tax expense and the amount computed by applying the statutory federal income tax rate	The following table shows the reasons for the difference between income tax expense and the amount computed by applying the statutory federal income tax rate (21%) to income before income taxes. 2024 2023 2022 Year Ended December 31 (Dollars in thousands) Amount Percent of Pretax Income Amount Percent of Pretax Income Amount Percent of Pretax Income Statutory federal income tax $ 35,922 21.0 % $ 33,953 21.0 % $ 32,925 21.0 % (Decrease) increase in income taxes resulting from: Tax-exempt interest income (465) (0.3) (592) (0.4) (504) (0.3) State taxes, net of federal income tax benefit 3,610 2.1 3,626 2.2 4,275 2.7 Other (628) (0.3) (241) (0.1) (441) (0.3) Total $ 38,439 22.5 % $ 36,746 22.7 % $ 36,255 23.1 %
Schedule of deferred tax assets and liabilities	The following table shows the composition of deferred tax assets and liabilities as of December 31, 2024 and 2023. (Dollars in thousands) 2024 2023 Deferred tax assets: Allowance for credit losses $ 34,738 $ 34,957 Operating lease liability 4,371 4,675 Accruals for employee benefits 4,361 4,103 Tax advantaged partnerships — 1,658 Net unrealized losses on securities available-for-sale 27,153 33,433 Other 1,838 2,405 Total deferred tax assets 72,461 81,231 Deferred tax liabilities: Differing depreciable bases in premises and leased equipment 4,782 5,198 Right of use assets - leases 5,075 5,224 Differing bases in assets related to acquisitions 4,335 4,308 Tax advantaged partnerships 574 — Other 2,152 2,246 Total deferred tax liabilities 16,918 16,976 Net deferred tax asset $ 55,543 $ 64,255

Contingent Liabilities, Commi_2

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Operating lease right of use assets and operating lease liabilities	The following table shows operating lease right of use assets and operating lease liabilities as of December 31. (Dollars in thousands) Statement of Financial Condition classification 2024 2023 Operating lease right of use assets Accrued income and other assets $ 21,076 $ 21,692 Operating lease liabilities Accrued expenses and other liabilities $ 18,150 $ 19,413
Components of operating lease expense	The following table shows the components of operating leases expense for the year ended December 31. (Dollars in thousands) Statement of Income classification 2024 2023 2022 Operating lease cost Net occupancy expense $ 3,855 $ 3,721 $ 3,527 Short-term lease cost Net occupancy expense — 9 18 Variable lease cost Net occupancy expense 9 8 8 Total operating lease cost $ 3,864 $ 3,738 $ 3,553
Future minimum rental commitments for noncancellable operating leases	The following table shows future minimum rental commitments for all noncancellable operating leases with an initial term longer than 12 months for the next five years and thereafter. (Dollars in thousands) 2025 $ 4,270 2026 3,730 2027 3,028 2028 1,784 2029 1,701 Thereafter 7,468 Total lease payments 21,981 Less: imputed interest (3,831) Present value of operating lease liabilities $ 18,150
Operating lease weighted average remaining term, discount rate, and supplmental cash flows information	The following table shows the weighted average remaining operating lease term, the weighted average discount rate and supplemental Consolidated Statement of Cash Flows information for operating leases at December 31. (Dollars in thousands) 2024 2023 2022 Weighted average remaining lease term 8.94 years 9.31 years 9.33 years Weighted average discount rate 4.34 % 4.28 % 1.85 % Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,509 $ 4,508 $ 4,298
Schedule of financial instruments whose contract amounts represent credit risk	Financial instruments, whose contract amounts represent credit risk as of December 31, were as follows: (Dollars in thousands) 2024 2023 Amounts of commitments: Loan commitments to extend credit $ 1,304,735 $ 1,454,506 Standby letters of credit $ 21,828 $ 17,287 Commercial and similar letters of credit $ 161 $ 7,047

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of amounts of non-hedging derivative financial instruments	The following table shows the amounts of non-hedging derivative financial instruments at December 31, 2024 and 2023. Asset derivatives Liability derivatives (Dollars in thousands) Notional or contractual amount Statement of Financial Condition classification Fair value Statement of Financial Condition classification Fair value Interest rate swap contracts $ 1,083,673 Other assets $ 16,424 Other liabilities $ 16,727 Loan commitments 3,586 Mortgages held for sale 118 N/A — Forward contracts - mortgage loan 4,500 Mortgages held for sale 17 N/A — Total - December 31, 2024 $ 1,091,759 $ 16,559 $ 16,727 Interest rate swap contracts $ 1,085,618 Other assets $ 22,704 Other liabilities $ 23,140 Loan commitments 2,824 Mortgages held for sale 107 N/A — Forward contracts - mortgage loan 3,500 N/A — Mortgages held for sale 16 Total - December 31, 2023 $ 1,091,942 $ 22,811 $ 23,156
Schedule of amounts included in the consolidated statements of income for non-hedging derivative financial instruments	The following table shows the amounts included on the Consolidated Statements of Income for non-hedging derivative financial instruments at December 31, 2024, 2023 and 2022. Gain (loss) (Dollars in thousands) Statement of Income classification 2024 2023 2022 Interest rate swap contracts Other expense $ 133 $ 33 $ (32) Interest rate swap contracts Other income 831 1,310 83 Loan commitments Mortgage banking 11 40 (385) Forward contracts - mortgage loan Mortgage banking 33 (40) 35 Total $ 1,008 $ 1,343 $ (299)
Schedule of offsetting of financial assets and derivative assets	The following table shows the offsetting of financial assets and derivative assets at December 31, 2024 and 2023. Gross Amounts Not Offset in the Statement of Financial Condition (Dollars in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Assets Presented in the Statement of Financial Condition Financial Instruments Cash Collateral Received Net Amount December 31, 2024 Interest rate swaps $ 16,424 $ — $ 16,424 $ — $ 12,615 $ 3,809 December 31, 2023 Interest rate swaps $ 22,704 $ — $ 22,704 $ — $ 10,795 $ 11,909
Schedule of offsetting of financial liabilities and derivative liabilities	The following table shows the offsetting of financial liabilities and derivative liabilities at December 31, 2024 and 2023. Gross Amounts Not Offset in the Statement of Financial Condition (Dollars in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts of Liabilities Presented in the Statement of Financial Condition Financial Instruments Cash Collateral Pledged Net Amount December 31, 2024 Interest rate swaps $ 16,727 $ — $ 16,727 $ — $ — $ 16,727 Repurchase agreements 72,345 — 72,345 72,345 — — Total $ 89,072 $ — $ 89,072 $ 72,345 $ — $ 16,727 December 31, 2023 Interest rate swaps $ 23,140 $ — $ 23,140 $ — $ — $ 23,140 Repurchase agreements 55,809 — 55,809 55,809 — — Total $ 78,949 $ — $ 78,949 $ 55,809 $ — $ 23,140

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2024
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Schedule of actual and required capital amounts and ratios	The following table shows the actual and required capital amounts and ratios for 1st Source Corporation and 1st Source Bank as of December 31, 2024 and 2023. Actual Minimum Capital Adequacy Minimum Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio 2024 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 1,345,500 17.08 % $ 630,028 8.00 % $ 826,912 10.50 % $ 787,535 10.00 % 1st Source Bank 1,246,610 15.83 630,034 8.00 826,920 10.50 787,543 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 1,246,267 15.82 472,521 6.00 669,405 8.50 630,028 8.00 1st Source Bank 1,147,376 14.57 472,526 6.00 669,412 8.50 630,034 8.00 Common Equity Tier 1 Capital (to Risk- 1st Source Corporation 1,118,829 14.21 354,391 4.50 551,274 7.00 511,898 6.50 1st Source Bank 1,076,938 13.67 354,394 4.50 551,280 7.00 511,903 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 1,246,267 14.05 354,927 4.00 N/A N/A 443,659 5.00 1st Source Bank 1,147,376 12.93 354,822 4.00 N/A N/A 443,528 5.00 2023 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 1,248,905 16.25 % $ 614,880 8.00 % $ 807,031 10.50 % $ 768,601 10.00 % 1st Source Bank 1,168,672 15.21 614,547 8.00 806,593 10.50 768,184 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 1,152,093 14.99 461,160 6.00 653,311 8.50 614,880 8.00 1st Source Bank 1,071,912 13.95 460,910 6.00 652,956 8.50 614,547 8.00 Common Equity Tier 1 Capital (to Risk- Weighted Assets): 1st Source Corporation 1,016,398 13.22 345,870 4.50 538,020 7.00 499,590 6.50 1st Source Bank 993,217 12.93 345,683 4.50 537,729 7.00 499,319 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 1,152,093 13.26 347,512 4.00 N/A N/A 434,390 5.00 1st Source Bank 1,071,912 12.34 347,397 4.00 N/A N/A 434,246 5.00

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2024
Fair value measurements
Schedule of differences between the fair value carrying amount of mortgages held for sale measured at fair value and the aggregate unpaid principal amount	The following table shows the differences between fair value carrying amount of mortgages held for sale measured at fair value and the aggregate unpaid principal amount the Company is contractually entitled to receive at maturity on December 31, 2024 and 2023. (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Excess of fair value carrying amount over (under) unpaid principal December 31, 2024 Mortgages held for sale reported at fair value: Total Loans $ 2,569 $ 2,343 $ 226 (1) December 31, 2023 Mortgages held for sale reported at fair value: Total Loans $ 1,442 $ 1,297 $ 145 (1) (1) The excess of fair value carrying amount over (under) unpaid principal is included in mortgage banking income and includes changes in fair value at and subsequent to funding and gains and losses on the related loan commitment prior to funding.
Schedule of assets and liabilities measured at fair value on a recurring basis	The following table shows the balance of assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) Level 1 Level 2 Level 3 Total December 31, 2024 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 446,021 $ 311,728 $ — $ 757,749 U.S. States and political subdivisions securities — 81,600 1,032 82,632 Mortgage-backed securities - Federal agencies — 695,918 — 695,918 Corporate debt securities — — — — Foreign government and other securities — — — — Total debt securities available-for-sale 446,021 1,089,246 1,032 1,536,299 Mortgages held for sale — 2,569 — 2,569 Accrued income and other assets (interest rate swap agreements) — 16,424 — 16,424 Total $ 446,021 $ 1,108,239 $ 1,032 $ 1,555,292 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 16,727 $ — $ 16,727 Total $ — $ 16,727 $ — $ 16,727 December 31, 2023 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 541,461 $ 381,405 $ — $ 922,866 U.S. States and political subdivisions securities — 91,403 1,161 92,564 Mortgage-backed securities - Federal agencies — 598,252 — 598,252 Corporate debt securities — 8,329 — 8,329 Foreign government and other securities — 589 — 589 Total debt securities available-for-sale 541,461 1,079,978 1,161 1,622,600 Mortgages held for sale — 1,442 — 1,442 Accrued income and other assets (interest rate swap agreements) — 22,704 — 22,704 Total $ 541,461 $ 1,104,124 $ 1,161 $ 1,646,746 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 23,140 $ — $ 23,140 Total $ — $ 23,140 $ — $ 23,140
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis	The following table shows the changes in Level 3 assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) U.S. States and political subdivisions securities Beginning balance January 1, 2024 $ 1,161 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income 51 Purchases — Issuances — Sales — Settlements — Maturities (180) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2024 $ 1,032 Beginning balance January 1, 2023 $ 1,464 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income (43) Purchases 3,000 Issuances — Sales — Settlements — Maturities (3,260) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2023 $ 1,161
Schedule of carrying value of assets measured at fair value on a non-recurring basis	The following table shows the carrying value of assets measured at fair value on a non-recurring basis. (Dollars in thousands) Level 1 Level 2 Level 3 Total December 31, 2024 Collateral-dependent impaired loans $ — $ — $ 725 $ 725 Accrued income and other assets (mortgage servicing rights) — — 3,436 3,436 Accrued income and other assets (repossessions) — — 155 155 Accrued income and other assets (other real estate) — — 460 460 Total $ — $ — $ 4,776 $ 4,776 December 31, 2023 Collateral-dependent impaired loans $ — $ — $ 6,289 $ 6,289 Accrued income and other assets (mortgage servicing rights) — — 3,670 3,670 Accrued income and other assets (repossessions) — — 705 705 Accrued income and other assets (other real estate) — — — — Total $ — $ — $ 10,664 $ 10,664
Schedule of fair values of financial instruments	The following table shows the fair values of the Company’s financial instruments. (Dollars in thousands) Carrying or Contract Value Fair Value Level 1 Level 2 Level 3 December 31, 2024 Assets: Cash and due from banks $ 76,837 $ 76,837 $ 76,837 $ — $ — Federal funds sold and interest bearing deposits with other banks 47,989 47,989 47,989 — — Investment securities available-for-sale 1,536,299 1,536,299 446,021 1,089,246 1,032 Other investments 23,855 23,855 23,855 — — Mortgages held for sale 2,569 2,569 — 2,569 — Loans and leases, net of allowance for loan and lease losses 6,699,268 6,608,109 — — 6,608,109 Mortgage servicing rights 3,436 7,480 — — 7,480 Accrued interest receivable 32,790 32,790 — 32,790 — Interest rate swaps 16,424 16,424 — 16,424 — Liabilities: Deposits $ 7,230,035 $ 7,226,239 $ 5,440,309 $ 1,785,930 $ — Short-term borrowings 249,198 249,198 74,198 175,000 — Long-term debt and mandatorily redeemable securities 39,156 38,784 — 38,784 — Subordinated notes 58,764 56,903 — 56,903 — Accrued interest payable 36,494 36,494 — 36,494 — Interest rate swaps 16,727 16,727 — 16,727 — Off-balance-sheet instruments * — 144 — 144 — December 31, 2023 Assets: Cash and due from banks $ 77,474 $ 77,474 $ 77,474 $ — $ — Federal funds sold and interest bearing deposits with other banks 52,194 52,194 52,194 — — Investment securities available-for-sale 1,622,600 1,622,600 541,461 1,079,978 1,161 Other investments 25,075 25,075 25,075 — — Mortgages held for sale 1,442 1,442 — 1,442 — Loans and leases, net of allowance for loan and lease losses 6,370,953 6,204,791 — — 6,204,791 Mortgage servicing rights 3,670 8,151 — — 8,151 Accrued interest receivable 30,232 30,232 — 30,232 — Interest rate swaps 22,704 22,704 — 22,704 — Liabilities: Deposits $ 7,038,581 $ 7,033,549 $ 5,299,896 $ 1,733,653 $ — Short-term borrowings 312,359 312,359 56,013 256,346 — Long-term debt and mandatorily redeemable securities 47,911 47,098 — 47,098 — Subordinated notes 58,764 55,842 — 55,842 — Accrued interest payable 29,520 29,520 — 29,520 — Interest rate swaps 23,140 23,140 — 23,140 — Off-balance-sheet instruments * — 120 — 120 — * Represents estimated cash outflows required to currently settle the obligations at current market rates.
Recurring
Fair value measurements
Schedule of valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a recurring and non-recurring basis	The following table shows the valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a recurring basis. (Dollars in thousands) Fair value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average December 31, 2024 Debt securities available-for-sale Direct placement municipal securities $ 1,032 Discounted cash flows Credit spread assumption 1.15% - 4.59% 3.96 % December 31, 2023 Debt securities available-for-sale Direct placement municipal securities $ 1,161 Discounted cash flows Credit spread assumption 0.31% - 5.28% 4.28 %
Non-recurring
Fair value measurements
Schedule of valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a recurring and non-recurring basis	The following table shows the valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a non-recurring basis. (Dollars in thousands) Carrying Value Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average December 31, 2024 Collateral-dependent impaired loans $ 725 $ 725 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 25% - 30% 28.0 % Mortgage servicing rights 3,436 7,480 Discounted cash flows Constant prepayment rate (CPR) 7.6% - 23.0% 7.6 % Discount rate 11.1% - 13.1% 11.3 % Repossessions 155 170 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 10% 9 % Other real estate 460 500 Appraisals Discount for lack of marketability 0% - 8% 8 % December 31, 2023 Collateral-dependent impaired loans $ 6,289 $ 6,289 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 10% - 20% 13.9 % Mortgage servicing rights 3,670 8,151 Discounted cash flows Constant prepayment rate (CPR) 6.1% - 17.6% 7.3 % Discount rate 11.0% - 13.1% 11.2 % Repossessions 705 757 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 10% 8 % Other real estate — — Appraisals Discount for lack of marketability 0% - 0% 0 %

1st Source Corporation (Paren_2

1st Source Corporation (Parent Company Only) Financial Information (Tables)	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Schedule of statements of financial condition	STATEMENTS OF FINANCIAL CONDITION December 31 (Dollars in thousands) 2024 2023 ASSETS Cash and cash equivalents $ 126,889 $ 105,889 Short-term investments with bank subsidiary 500 500 Investments in: Bank subsidiaries 1,068,478 965,688 Non-bank subsidiaries 1 1 Right of use assets 12,552 13,895 Other assets 6,500 6,821 Total assets $ 1,214,920 $ 1,092,794 LIABILITIES AND SHAREHOLDERS’ EQUITY Long-term debt and mandatorily redeemable securities $ 29,156 $ 27,158 Subordinated notes 58,764 58,764 Operating lease liability 9,682 11,682 Other liabilities 6,250 5,622 Total liabilities 103,852 103,226 Total shareholders’ equity 1,111,068 989,568 Total liabilities and shareholders’ equity $ 1,214,920 $ 1,092,794
Schedule of statements of income	STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Income: Dividends from bank subsidiary $ 55,223 $ 50,152 $ 49,588 Rental income from subsidiaries 1,961 1,832 1,740 Investment securities and other investment gains 124 261 353 Other 307 239 148 Total income 57,615 52,484 51,829 Expenses: Interest on subordinated notes 4,217 4,174 3,550 Interest on long-term debt and mandatorily redeemable securities 3,008 3,606 (341) Interest on commercial paper and other short-term borrowings — 2 1 Occupancy 1,826 1,718 1,625 Other 926 917 890 Total expenses 9,977 10,417 5,725 Income before income tax benefit and equity in undistributed income of subsidiaries 47,638 42,067 46,104 Income tax benefit 1,287 1,246 1,099 Income before equity in undistributed income of subsidiaries 48,925 43,313 47,203 Equity in undistributed income of subsidiaries: Bank subsidiaries 83,693 81,621 73,329 Net income $ 132,618 $ 124,934 $ 120,532 Comprehensive income (loss) $ 151,709 $ 166,301 $ (17,297)
Schedule of statements of cash flow	STATEMENTS OF CASH FLOWS Year Ended December 31 (Dollars in thousands) 2024 2023 2022 Operating activities: Net income $ 132,618 $ 124,934 $ 120,532 Adjustments to reconcile net income to net cash provided by operating activities: Equity (undistributed) distributed in excess of income of subsidiaries (83,693) (81,621) (73,329) Amortization of right of use assets 1,343 1,354 1,376 Stock-based compensation 142 152 120 Realized/unrealized investment securities and other investment gains (124) (261) (353) Other 1,326 2,863 (702) Net change in operating activities 51,612 47,421 47,644 Investing activities: Net change in partnership investments 260 (246) 102 Net change in investing activities 260 (246) 102 Financing activities: Net change in commercial paper — (3,096) (871) Proceeds from issuance of long-term debt and mandatorily redeemable securities 2,374 1,908 1,862 Payments on long-term debt and mandatorily redeemable securities (1,884) (2,887) (2,708) Stock issued under stock purchase plans 153 78 252 Net proceeds from issuance of treasury stock 4,059 3,576 2,792 Acquisition of treasury stock (178) (12,469) (6,836) Cash dividends paid on common stock (35,396) (33,074) (32,102) Net change in financing activities (30,872) (45,964) (37,611) Net change in cash and cash equivalents 21,000 1,211 10,135 Cash and cash equivalents, beginning of year 105,889 104,678 94,543 Cash and cash equivalents, end of year $ 126,889 $ 105,889 $ 104,678

Accounting Policies (Details)

Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) segment class unit Rate	Dec. 31, 2023 USD ($)
Securities
Held-to-maturity investment securities	$ 0	$ 0
Loans and leases
Percentage of the principal balance that may be repurchased of a delinquent Ginnie Mae (GNMA) mortgage loan (as a percent)	100%
Allowance for credit losses
Number of segments within the loan and lease portfolio with similar risk characteristics | class	9
Lease Commitments
Minimum lease liability for capitalization	$ 2,000
Residual value guarantees or restriction or covenants imposed by leases	no
Minimum initial lease term for recording right of use asset and lease liability	12 months
Other real estate
Carrying value of other real estate	$ 460,000	0
Repossessed assets
Repossessed assets value	$ 160,000	710,000
Goodwill and intangibles
Number of reportable units used in goodwill allocation | unit	2
Partnership investment
Maximum percentage of partnership accounted for as equity investment | Rate	50%
Investment Owned, Fair Value	$ 140,240,000	166,600,000
Segment reporting
Number of business segments aggregated as reportable operating segments | segment	1
Life Insurance, Corporate or Bank Owned, Amount	$ 86,400,000	84,410,000
Residential real estate portfolio
Loans and leases
Loans available for repurchase	$ 1,850,000	$ 1,550,000
Minimum
Loans and leases
Period of sustained performance required to change from non-performing to performing status	6 months
Equipment owned under operating lease
Lease term	3 years
Lease Commitments
Economic life test to determine lease classification	twenty years
Fair value test percentage of the fair value of the asset | Rate	90%
Premises and equipment
Useful life of premises and equipment	3 years
Income taxes
Tax benefit realized on settlement, percentage	50%
Minimum | Federal funds purchased
Short-term borrowings:
Term of short-term debt	1 day
Minimum | Security repurchase agreements
Short-term borrowings:
Term of short-term debt	1 day
Minimum | Other short-term borrowings
Short-term borrowings:
Term of short-term debt	1 day
Minimum | Commercial paper
Short-term borrowings:
Term of short-term debt	7 days
Maximum
Allowance for credit losses
Current expected credit losses initial loss forecast term	2 years
Equipment owned under operating lease
Lease term	7 years
Premises and equipment
Useful life of premises and equipment	31 years 6 months
Goodwill and intangibles
Useful life of finite lived assets	25 years
Maximum | Federal funds purchased
Short-term borrowings:
Term of short-term debt	365 days
Maximum | Security repurchase agreements
Short-term borrowings:
Term of short-term debt	365 days
Maximum | Other short-term borrowings
Short-term borrowings:
Term of short-term debt	365 days
Maximum | Commercial paper
Short-term borrowings:
Term of short-term debt	270 days

Investment Securities Availab_3

Investment Securities Available-For-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Due in one year or less	$ 253,351
Due after one year through five years	550,751
Due after five years through ten years	52,645
Due after ten years	15,975
Mortgage-backed securities	777,962
Debt securities, available-for-sale, amortized cost	1,650,684	$ 1,762,357
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Due in one year or less	248,772
Due after one year through five years	523,993
Due after five years through ten years	52,076
Due after ten years	15,540
Mortgage-backed securities	695,918
Total debt securities available-for-sale	1,536,299	1,622,600
Accrued interest receivable on investment securities available-for-sale	$ 4,680	$ 4,600
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued income and other assets	Accrued income and other assets
U.S. Treasury and Federal agencies securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Debt securities, available-for-sale, amortized cost	$ 786,417	$ 979,530
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	757,749	922,866
U.S. States and political subdivisions securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Debt securities, available-for-sale, amortized cost	86,305	97,522
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	82,632	92,564
Mortgage-backed securities - Federal agencies
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Debt securities, available-for-sale, amortized cost	777,962	676,257
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	695,918	598,252
Corporate debt securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Debt securities, available-for-sale, amortized cost	0	8,448
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	0	8,329
Foreign government and other securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Debt securities, available-for-sale, amortized cost	0	600
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	$ 0	$ 589

Investment Securities Availab_4

Investment Securities Available-For-Sale (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	$ 1,650,684	$ 1,762,357
Gross Unrealized Gains	249	1,162
Gross Unrealized Losses	(114,634)	(140,919)
Investment securities available for sale	1,536,299	1,622,600
Fair Value
Less than 12 Months	332,417	9,804
12 Months or Longer	1,150,098	1,542,830
Total fair value	1,482,515	1,552,634
Unrealized Losses
Less than 12 Months	(5,349)	(100)
12 Months or Longer	(109,285)	(140,819)
Total unrealized losses	(114,634)	(140,919)
Gross realized gains and losses
Gross realized gains	0	733	$ 0
Gross realized losses	(3,889)	(3,659)	(184)
Net realized (losses) gains	(3,889)	(2,926)	$ (184)
Investment securities pledged as collateral	$ 359,100	411,380
Number of available-for-sale debt securities	625
Number of available-for-sale debt securities in an unrealized loss position	589
U.S. Treasury and Federal agencies securities
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	$ 786,417	979,530
Gross Unrealized Gains	24	178
Gross Unrealized Losses	(28,692)	(56,842)
Investment securities available for sale	757,749	922,866
Fair Value
Less than 12 Months	103,621	0
12 Months or Longer	644,614	913,417
Total fair value	748,235	913,417
Unrealized Losses
Less than 12 Months	(1,324)	0
12 Months or Longer	(27,368)	(56,842)
Total unrealized losses	(28,692)	(56,842)
U.S. States and political subdivisions securities
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	86,305	97,522
Gross Unrealized Gains	33	508
Gross Unrealized Losses	(3,706)	(5,466)
Investment securities available for sale	82,632	92,564
Fair Value
Less than 12 Months	37,017	1,251
12 Months or Longer	39,280	69,747
Total fair value	76,297	70,998
Unrealized Losses
Less than 12 Months	(670)	(2)
12 Months or Longer	(3,036)	(5,464)
Total unrealized losses	(3,706)	(5,466)
Mortgage-backed securities - Federal agencies
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	777,962	676,257
Gross Unrealized Gains	192	476
Gross Unrealized Losses	(82,236)	(78,481)
Investment securities available for sale	695,918	598,252
Fair Value
Less than 12 Months	191,779	8,553
12 Months or Longer	466,204	550,748
Total fair value	657,983	559,301
Unrealized Losses
Less than 12 Months	(3,355)	(98)
12 Months or Longer	(78,881)	(78,383)
Total unrealized losses	(82,236)	(78,481)
Corporate debt securities
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	0	8,448
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(119)
Investment securities available for sale	0	8,329
Fair Value
Less than 12 Months	0	0
12 Months or Longer	0	8,329
Total fair value	0	8,329
Unrealized Losses
Less than 12 Months	0	0
12 Months or Longer	0	(119)
Total unrealized losses	0	(119)
Foreign government and other securities
Schedule Of Available For Sale Debt Securities [Line Items]
Debt securities, available-for-sale, amortized cost	0	600
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(11)
Investment securities available for sale	0	589
Fair Value
Less than 12 Months	0	0
12 Months or Longer	0	589
Total fair value	0	589
Unrealized Losses
Less than 12 Months	0	0
12 Months or Longer	0	(11)
Total unrealized losses	$ 0	$ (11)

Loan and Lease Financings (Deta

Loan and Lease Financings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) method	Dec. 31, 2023 USD ($)
Receivables [Abstract]
Total loans and leases	$ 6,854,808	$ 6,518,505
Increase (Decrease) in Loans, Deferred Income	1,430	1,650
Accrued interest receivable on loans and leases	$ 28,020	$ 25,350
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued income and other assets	Accrued income and other assets
Loan to related parties	$ 23,130	$ 7,740
New loans and other additions to related parties	19,860	8,510
Repayments and other reductions of loan given to related parties	$ 4,470	$ 13,300
Number of methods to assess credit risk | method	2

Loan and Lease Financings (De_2

Loan and Lease Financings (Details 2)	12 Months Ended
	Dec. 31, 2024 USD ($) class	Dec. 31, 2023 USD ($)
Loan and Lease Financings
Number of domestic aircraft loan pools | class	2
Total loans and leases	$ 6,854,808,000	$ 6,518,505,000
Commercial and agricultural
Loan and Lease Financings
Financing receivable originated during current fiscal year	137,326,000	163,158,000
Financing receivable originated one year prior to current fiscal year	119,587,000	127,374,000
Financing receivable originated two years prior to current fiscal year	74,465,000	73,359,000
Financing receivable originated three years prior to current fiscal year	38,741,000	40,209,000
Financing receivable originated four years prior to current fiscal year	19,871,000	18,951,000
Financing receivable originated five years prior to current fiscal year	20,694,000	16,274,000
Revolving loans	362,290,000	326,898,000
Revolving loans converted to term	0	0
Total loans and leases	772,974,000	766,223,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	668,000
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	276,000	499,000
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	117,000	15,000
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	550,000	17,000
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	4,000
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	0
Current period gross charge-offs, revolving financing receivable	8,882,000	3,102,000
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	$ 9,825,000	4,305,000
Commercial and agricultural | Minimum
Loan and Lease Financings
Expected life of underlying collateral	3 years
Commercial and agricultural | Maximum
Loan and Lease Financings
Expected life of underlying collateral	7 years
Renewable energy
Loan and Lease Financings
Financing receivable originated during current fiscal year	$ 150,951,000	177,364,000
Financing receivable originated one year prior to current fiscal year	145,126,000	23,679,000
Financing receivable originated two years prior to current fiscal year	22,110,000	86,836,000
Financing receivable originated three years prior to current fiscal year	70,606,000	29,138,000
Financing receivable originated four years prior to current fiscal year	22,329,000	56,935,000
Financing receivable originated five years prior to current fiscal year	76,144,000	25,756,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	487,266,000	399,708,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	0
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	0	0
Auto and light truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	469,164,000	604,314,000
Financing receivable originated one year prior to current fiscal year	324,614,000	250,549,000
Financing receivable originated two years prior to current fiscal year	110,953,000	64,656,000
Financing receivable originated three years prior to current fiscal year	25,634,000	27,476,000
Financing receivable originated four years prior to current fiscal year	11,228,000	14,205,000
Financing receivable originated five years prior to current fiscal year	6,842,000	5,712,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	948,435,000	966,912,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	126,000
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	165,000	360,000
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	448,000	128,000
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	6,000	33,000
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	19,000
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	111,000	63,000
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	$ 730,000	729,000
Auto and light truck | Minimum
Loan and Lease Financings
Loan amortization period	18 months
Direct finance lease term	3 years
Auto and light truck | Maximum
Loan and Lease Financings
Loan amortization period	4 years
Direct finance lease term	7 years
Medium and heavy duty truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	$ 88,395,000	99,819,000
Financing receivable originated one year prior to current fiscal year	74,340,000	121,500,000
Financing receivable originated two years prior to current fiscal year	82,861,000	45,744,000
Financing receivable originated three years prior to current fiscal year	26,416,000	24,645,000
Financing receivable originated four years prior to current fiscal year	11,298,000	16,037,000
Financing receivable originated five years prior to current fiscal year	5,506,000	4,202,000
Revolving loans	0	0
Revolving loans converted to term	807,000	0
Total loans and leases	289,623,000	311,947,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	0
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	$ 0	0
Medium and heavy duty truck | Minimum
Loan and Lease Financings
Period of amortization to reach equity position in collateral	3 years
Medium and heavy duty truck | Maximum
Loan and Lease Financings
Period of amortization to reach equity position in collateral	4 years
Aircraft
Loan and Lease Financings
Financing receivable originated during current fiscal year	$ 349,981,000	279,755,000
Financing receivable originated one year prior to current fiscal year	198,480,000	364,650,000
Financing receivable originated two years prior to current fiscal year	296,597,000	201,283,000
Financing receivable originated three years prior to current fiscal year	153,040,000	145,287,000
Financing receivable originated four years prior to current fiscal year	85,600,000	37,244,000
Financing receivable originated five years prior to current fiscal year	32,326,000	43,533,000
Revolving loans	7,773,000	6,420,000
Revolving loans converted to term	0	0
Total loans and leases	1,123,797,000	1,078,172,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	15,000	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	53,000	0
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	$ 68,000	0
Aircraft | Minimum
Loan and Lease Financings
Loan amortization period	10 years
Aircraft | Maximum
Loan and Lease Financings
Loan amortization period	15 years
Construction equipment
Loan and Lease Financings
Financing receivable originated during current fiscal year	$ 491,586,000	466,799,000
Financing receivable originated one year prior to current fiscal year	336,093,000	353,834,000
Financing receivable originated two years prior to current fiscal year	219,800,000	132,875,000
Financing receivable originated three years prior to current fiscal year	71,937,000	65,508,000
Financing receivable originated four years prior to current fiscal year	45,724,000	29,543,000
Financing receivable originated five years prior to current fiscal year	10,890,000	7,803,000
Revolving loans	25,916,000	26,044,000
Revolving loans converted to term	1,966,000	2,346,000
Total loans and leases	1,203,912,000	1,084,752,000
Current period gross charge-offs, financing receivable originated during current fiscal year	46,000	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	989,000	44,000
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	390,000	10,000
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	267,000	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	0
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	1,692,000	54,000
Commercial real estate
Loan and Lease Financings
Financing receivable originated during current fiscal year	259,133,000	336,965,000
Financing receivable originated one year prior to current fiscal year	318,297,000	256,368,000
Financing receivable originated two years prior to current fiscal year	242,949,000	151,173,000
Financing receivable originated three years prior to current fiscal year	132,515,000	105,933,000
Financing receivable originated four years prior to current fiscal year	82,276,000	90,824,000
Financing receivable originated five years prior to current fiscal year	179,831,000	188,323,000
Revolving loans	264,000	275,000
Revolving loans converted to term	0	0
Total loans and leases	1,215,265,000	1,129,861,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	0	39,000
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	0	30,000
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	179,000
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	0
Current period gross charge-offs, revolving financing receivable	0	0
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	0	248,000
Residential real estate and home equity
Loan and Lease Financings
Financing receivable originated during current fiscal year	87,045,000	87,767,000
Financing receivable originated one year prior to current fiscal year	69,610,000	110,165,000
Financing receivable originated two years prior to current fiscal year	95,065,000	89,532,000
Financing receivable originated three years prior to current fiscal year	81,691,000	88,232,000
Financing receivable originated four years prior to current fiscal year	79,678,000	31,095,000
Financing receivable originated five years prior to current fiscal year	85,673,000	72,967,000
Revolving loans	175,014,000	152,573,000
Revolving loans converted to term	6,295,000	5,642,000
Total loans and leases	680,071,000	637,973,000
Current period gross charge-offs, financing receivable originated during current fiscal year	0	0
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	3,000	0
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	32,000	0
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	0	0
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	0	54,000
Current period gross charge-offs, revolving financing receivable	30,000	39,000
Current period gross charge-offs, revolving financing receivable converted to term loan	1,000	8,000
Current period gross charge-offs	66,000	101,000
Consumer
Loan and Lease Financings
Financing receivable originated during current fiscal year	43,714,000	53,086,000
Financing receivable originated one year prior to current fiscal year	33,415,000	48,035,000
Financing receivable originated two years prior to current fiscal year	28,930,000	19,862,000
Financing receivable originated three years prior to current fiscal year	10,149,000	6,317,000
Financing receivable originated four years prior to current fiscal year	2,431,000	2,567,000
Financing receivable originated five years prior to current fiscal year	1,003,000	1,027,000
Revolving loans	13,823,000	12,063,000
Revolving loans converted to term	0	0
Total loans and leases	133,465,000	142,957,000
Current period gross charge-offs, financing receivable originated during current fiscal year	565,000	541,000
Current period gross charge-offs, financing receivable originated one year prior to current fiscal year	230,000	455,000
Current period gross charge-offs, financing receivable originated two years prior to current fiscal year	276,000	138,000
Current period gross charge-offs, financing receivable originated three years prior to current fiscal year	118,000	28,000
Current period gross charge-offs, financing receivable originated four years prior to current fiscal year	16,000	17,000
Current period gross charge-offs, financing receivable originated five years prior to current fiscal year	22,000	3,000
Current period gross charge-offs, revolving financing receivable	122,000	29,000
Current period gross charge-offs, revolving financing receivable converted to term loan	0	0
Current period gross charge-offs	1,349,000	1,211,000
Credit Quality Grades 1-6 | Commercial and agricultural
Loan and Lease Financings
Financing receivable originated during current fiscal year	136,888,000	155,656,000
Financing receivable originated one year prior to current fiscal year	115,508,000	124,717,000
Financing receivable originated two years prior to current fiscal year	66,696,000	68,473,000
Financing receivable originated three years prior to current fiscal year	36,315,000	39,708,000
Financing receivable originated four years prior to current fiscal year	19,677,000	18,658,000
Financing receivable originated five years prior to current fiscal year	18,369,000	15,856,000
Revolving loans	331,282,000	299,495,000
Revolving loans converted to term	0	0
Total loans and leases	724,735,000	722,563,000
Credit Quality Grades 1-6 | Renewable energy
Loan and Lease Financings
Financing receivable originated during current fiscal year	150,951,000	177,364,000
Financing receivable originated one year prior to current fiscal year	145,126,000	23,679,000
Financing receivable originated two years prior to current fiscal year	22,110,000	86,836,000
Financing receivable originated three years prior to current fiscal year	70,606,000	29,138,000
Financing receivable originated four years prior to current fiscal year	22,329,000	56,935,000
Financing receivable originated five years prior to current fiscal year	76,144,000	25,756,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	487,266,000	399,708,000
Credit Quality Grades 1-6 | Auto and light truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	443,033,000	603,406,000
Financing receivable originated one year prior to current fiscal year	276,295,000	248,701,000
Financing receivable originated two years prior to current fiscal year	106,199,000	64,182,000
Financing receivable originated three years prior to current fiscal year	25,535,000	24,986,000
Financing receivable originated four years prior to current fiscal year	10,018,000	13,573,000
Financing receivable originated five years prior to current fiscal year	6,677,000	5,287,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	867,757,000	960,135,000
Credit Quality Grades 1-6 | Medium and heavy duty truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	88,395,000	96,254,000
Financing receivable originated one year prior to current fiscal year	72,816,000	114,490,000
Financing receivable originated two years prior to current fiscal year	81,238,000	44,069,000
Financing receivable originated three years prior to current fiscal year	25,726,000	24,645,000
Financing receivable originated four years prior to current fiscal year	11,298,000	15,264,000
Financing receivable originated five years prior to current fiscal year	5,493,000	4,202,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	284,966,000	298,924,000
Credit Quality Grades 1-6 | Aircraft
Loan and Lease Financings
Financing receivable originated during current fiscal year	347,099,000	269,635,000
Financing receivable originated one year prior to current fiscal year	190,776,000	355,175,000
Financing receivable originated two years prior to current fiscal year	285,677,000	197,579,000
Financing receivable originated three years prior to current fiscal year	151,194,000	140,744,000
Financing receivable originated four years prior to current fiscal year	82,208,000	37,244,000
Financing receivable originated five years prior to current fiscal year	32,326,000	36,936,000
Revolving loans	7,773,000	6,420,000
Revolving loans converted to term	0	0
Total loans and leases	1,097,053,000	1,043,733,000
Credit Quality Grades 1-6 | Construction equipment
Loan and Lease Financings
Financing receivable originated during current fiscal year	488,870,000	459,884,000
Financing receivable originated one year prior to current fiscal year	325,443,000	333,008,000
Financing receivable originated two years prior to current fiscal year	208,114,000	131,838,000
Financing receivable originated three years prior to current fiscal year	70,258,000	64,998,000
Financing receivable originated four years prior to current fiscal year	33,095,000	29,543,000
Financing receivable originated five years prior to current fiscal year	10,890,000	7,803,000
Revolving loans	25,916,000	26,044,000
Revolving loans converted to term	1,966,000	2,346,000
Total loans and leases	1,164,552,000	1,055,464,000
Credit Quality Grades 1-6 | Commercial real estate
Loan and Lease Financings
Financing receivable originated during current fiscal year	258,988,000	336,287,000
Financing receivable originated one year prior to current fiscal year	303,717,000	251,055,000
Financing receivable originated two years prior to current fiscal year	237,103,000	148,597,000
Financing receivable originated three years prior to current fiscal year	126,129,000	105,282,000
Financing receivable originated four years prior to current fiscal year	82,249,000	86,452,000
Financing receivable originated five years prior to current fiscal year	177,798,000	187,306,000
Revolving loans	264,000	275,000
Revolving loans converted to term	0	0
Total loans and leases	1,186,248,000	1,115,254,000
Credit Quality Grades 7-12
Loan and Lease Financings
Threshold value of loan or lease for evaluation of the appropriateness of the impairment reserve	250,000
Credit Quality Grades 7-12 | Commercial and agricultural
Loan and Lease Financings
Financing receivable originated during current fiscal year	438,000	7,502,000
Financing receivable originated one year prior to current fiscal year	4,079,000	2,657,000
Financing receivable originated two years prior to current fiscal year	7,769,000	4,886,000
Financing receivable originated three years prior to current fiscal year	2,426,000	501,000
Financing receivable originated four years prior to current fiscal year	194,000	293,000
Financing receivable originated five years prior to current fiscal year	2,325,000	418,000
Revolving loans	31,008,000	27,403,000
Revolving loans converted to term	0	0
Total loans and leases	48,239,000	43,660,000
Credit Quality Grades 7-12 | Renewable energy
Loan and Lease Financings
Financing receivable originated during current fiscal year	0	0
Financing receivable originated one year prior to current fiscal year	0	0
Financing receivable originated two years prior to current fiscal year	0	0
Financing receivable originated three years prior to current fiscal year	0	0
Financing receivable originated four years prior to current fiscal year	0	0
Financing receivable originated five years prior to current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	0	0
Credit Quality Grades 7-12 | Auto and light truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	26,131,000	908,000
Financing receivable originated one year prior to current fiscal year	48,319,000	1,848,000
Financing receivable originated two years prior to current fiscal year	4,754,000	474,000
Financing receivable originated three years prior to current fiscal year	99,000	2,490,000
Financing receivable originated four years prior to current fiscal year	1,210,000	632,000
Financing receivable originated five years prior to current fiscal year	165,000	425,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	80,678,000	6,777,000
Credit Quality Grades 7-12 | Medium and heavy duty truck
Loan and Lease Financings
Financing receivable originated during current fiscal year	0	3,565,000
Financing receivable originated one year prior to current fiscal year	1,524,000	7,010,000
Financing receivable originated two years prior to current fiscal year	1,623,000	1,675,000
Financing receivable originated three years prior to current fiscal year	690,000	0
Financing receivable originated four years prior to current fiscal year	0	773,000
Financing receivable originated five years prior to current fiscal year	13,000	0
Revolving loans	0	0
Revolving loans converted to term	807,000	0
Total loans and leases	4,657,000	13,023,000
Credit Quality Grades 7-12 | Aircraft
Loan and Lease Financings
Financing receivable originated during current fiscal year	2,882,000	10,120,000
Financing receivable originated one year prior to current fiscal year	7,704,000	9,475,000
Financing receivable originated two years prior to current fiscal year	10,920,000	3,704,000
Financing receivable originated three years prior to current fiscal year	1,846,000	4,543,000
Financing receivable originated four years prior to current fiscal year	3,392,000	0
Financing receivable originated five years prior to current fiscal year	0	6,597,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	26,744,000	34,439,000
Credit Quality Grades 7-12 | Construction equipment
Loan and Lease Financings
Financing receivable originated during current fiscal year	2,716,000	6,915,000
Financing receivable originated one year prior to current fiscal year	10,650,000	20,826,000
Financing receivable originated two years prior to current fiscal year	11,686,000	1,037,000
Financing receivable originated three years prior to current fiscal year	1,679,000	510,000
Financing receivable originated four years prior to current fiscal year	12,629,000	0
Financing receivable originated five years prior to current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	39,360,000	29,288,000
Credit Quality Grades 7-12 | Commercial real estate
Loan and Lease Financings
Financing receivable originated during current fiscal year	145,000	678,000
Financing receivable originated one year prior to current fiscal year	14,580,000	5,313,000
Financing receivable originated two years prior to current fiscal year	5,846,000	2,576,000
Financing receivable originated three years prior to current fiscal year	6,386,000	651,000
Financing receivable originated four years prior to current fiscal year	27,000	4,372,000
Financing receivable originated five years prior to current fiscal year	2,033,000	1,017,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	29,017,000	14,607,000
Performing | Residential real estate and home equity
Loan and Lease Financings
Financing receivable originated during current fiscal year	87,045,000	87,767,000
Financing receivable originated one year prior to current fiscal year	69,439,000	110,058,000
Financing receivable originated two years prior to current fiscal year	94,441,000	89,458,000
Financing receivable originated three years prior to current fiscal year	81,345,000	88,232,000
Financing receivable originated four years prior to current fiscal year	79,575,000	30,681,000
Financing receivable originated five years prior to current fiscal year	85,333,000	72,211,000
Revolving loans	173,876,000	152,037,000
Revolving loans converted to term	6,210,000	5,575,000
Total loans and leases	677,264,000	636,019,000
Performing | Consumer
Loan and Lease Financings
Financing receivable originated during current fiscal year	43,692,000	53,023,000
Financing receivable originated one year prior to current fiscal year	33,063,000	47,789,000
Financing receivable originated two years prior to current fiscal year	28,594,000	19,739,000
Financing receivable originated three years prior to current fiscal year	10,092,000	6,286,000
Financing receivable originated four years prior to current fiscal year	2,398,000	2,539,000
Financing receivable originated five years prior to current fiscal year	983,000	1,021,000
Revolving loans	13,823,000	12,063,000
Revolving loans converted to term	0	0
Total loans and leases	132,645,000	142,460,000
Nonperforming | Residential real estate and home equity
Loan and Lease Financings
Financing receivable originated during current fiscal year	0	0
Financing receivable originated one year prior to current fiscal year	171,000	107,000
Financing receivable originated two years prior to current fiscal year	624,000	74,000
Financing receivable originated three years prior to current fiscal year	346,000	0
Financing receivable originated four years prior to current fiscal year	103,000	414,000
Financing receivable originated five years prior to current fiscal year	340,000	756,000
Revolving loans	1,138,000	536,000
Revolving loans converted to term	85,000	67,000
Total loans and leases	2,807,000	1,954,000
Nonperforming | Consumer
Loan and Lease Financings
Financing receivable originated during current fiscal year	22,000	63,000
Financing receivable originated one year prior to current fiscal year	352,000	246,000
Financing receivable originated two years prior to current fiscal year	336,000	123,000
Financing receivable originated three years prior to current fiscal year	57,000	31,000
Financing receivable originated four years prior to current fiscal year	33,000	28,000
Financing receivable originated five years prior to current fiscal year	20,000	6,000
Revolving loans	0	0
Revolving loans converted to term	0	0
Total loans and leases	820,000	497,000
Amortized cost of loans and leases that were both experiencing financial difficulty and modified
Loan and Lease Financings
Threshold value of loan or lease for evaluation of the appropriateness of the impairment reserve	$ 250,000	$ 250,000

Loan and Lease Financings (De_3

Loan and Lease Financings (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	$ 6,854,808	$ 6,518,505
90 Days or More Past Due and Accruing	106	149
Total Accruing Loans	6,824,195	6,495,124
Nonaccrual	30,613	23,381
Increase in interest income	2,060	1,470	$ 2,680
Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	6,809,188	6,478,178
30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	14,066	12,705
60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	835	4,092
Commercial and agricultural
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	772,974	766,223
Total Accruing Loans	768,259	752,956
Nonaccrual	4,715	13,267
Commercial and agricultural | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	767,942	752,947
Commercial and agricultural | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	275	9
Commercial and agricultural | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	42	0
Renewable energy
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	487,266	399,708
Total Accruing Loans	487,266	399,708
Nonaccrual	0	0
Renewable energy | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	487,266	399,708
Renewable energy | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Renewable energy | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Auto and light truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	948,435	966,912
Total Accruing Loans	945,629	962,246
Nonaccrual	2,806	4,666
Auto and light truck | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	943,403	962,226
Auto and light truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	2,226	20
Auto and light truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Medium and heavy duty truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	289,623	311,947
Total Accruing Loans	289,623	311,947
Nonaccrual	0	0
Medium and heavy duty truck | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	289,623	311,915
Medium and heavy duty truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	32
Medium and heavy duty truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Aircraft
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,123,797	1,078,172
Total Accruing Loans	1,123,797	1,078,172
Nonaccrual	0	0
Aircraft | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,123,797	1,069,830
Aircraft | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	8,113
Aircraft | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	229
Construction equipment
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,203,912	1,084,752
Total Accruing Loans	1,185,936	1,084,576
Nonaccrual	17,976	176
Construction equipment | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,185,936	1,078,912
Construction equipment | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	2,044
Construction equipment | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	3,620
Commercial real estate
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,215,265	1,129,861
Total Accruing Loans	1,213,670	1,126,891
Nonaccrual	1,595	2,970
Commercial real estate | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,203,967	1,126,806
Commercial real estate | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	9,703	0
Commercial real estate | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	85
Residential real estate and home equity
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	680,071	637,973
90 Days or More Past Due and Accruing	96	142
Total Accruing Loans	677,360	636,161
Nonaccrual	2,711	1,812
Residential real estate and home equity | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	675,669	634,345
Residential real estate and home equity | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,010	1,623
Residential real estate and home equity | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	585	51
Consumer
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	133,465	142,957
90 Days or More Past Due and Accruing	10	7
Total Accruing Loans	132,655	142,467
Nonaccrual	810	490
Consumer | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	131,585	141,489
Consumer | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	852	864
Consumer | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	$ 208	$ 107

Loan and Lease Financings (De_4

Loan and Lease Financings (Details 4) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($) item
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable	0.66%	0.27%
Commitments to lend additional amounts	$ 8,400	$ 2,270
Weighted Average Interest Rate Reduction	0%	3%
Weighted Average Term Extension Modification (in months)	0 months	4 months
Weighted Average Payment Delay (in months)	6 months	6 months
Combination Weighted Average Payment Delay and Term Extension (in months)	3 months	10 months
Loan modifications to borrowers experiencing financial difficulties subsequent default | item	1	1
Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 44,721	$ 14,678
30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	288
60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	486	0
Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	2,847
Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	486	3,135
Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	2,040	3,304
Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	1,496
Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	426
Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 43,167	$ 12,587
Commercial and agricultural
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable	0.14%	0.59%
Weighted Average Interest Rate Reduction	0%	0%
Weighted Average Term Extension Modification (in months)	0 months	3 months
Weighted Average Payment Delay (in months)	6 months	6 months
Combination Weighted Average Payment Delay and Term Extension (in months)	0 months	30 months
Commercial and agricultural | Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 1,052	$ 1,706
Commercial and agricultural | 30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial and agricultural | 60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial and agricultural | Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	2,847
Commercial and agricultural | Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	2,847
Commercial and agricultural | Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	1,052	3,016
Commercial and agricultural | Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial and agricultural | Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial and agricultural | Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 0	$ 1,537
Auto and light truck
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable	4.23%
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension Modification (in months)	0 months
Weighted Average Payment Delay (in months)	0 months
Combination Weighted Average Payment Delay and Term Extension (in months)	3 months
Auto and light truck | Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 39,664
Auto and light truck | 30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0
Auto and light truck | 60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	486
Auto and light truck | Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0
Auto and light truck | Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	486
Auto and light truck | Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0
Auto and light truck | Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0
Auto and light truck | Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0
Auto and light truck | Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 40,150
Medium and heavy duty truck
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable	1.04%	3.54%
Weighted Average Interest Rate Reduction	0%	0%
Weighted Average Term Extension Modification (in months)	0 months	0 months
Weighted Average Payment Delay (in months)	0 months	0 months
Combination Weighted Average Payment Delay and Term Extension (in months)	4 months	6 months
Medium and heavy duty truck | Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 3,017	$ 11,050
Medium and heavy duty truck | 30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | 60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Medium and heavy duty truck | Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 3,017	$ 11,050
Construction equipment
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable		0.14%
Weighted Average Interest Rate Reduction		0%
Weighted Average Term Extension Modification (in months)		5 months
Weighted Average Payment Delay (in months)		0 months
Combination Weighted Average Payment Delay and Term Extension (in months)		0 months
Construction equipment | Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		$ 1,496
Construction equipment | 30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | 60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		1,496
Construction equipment | Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		0
Construction equipment | Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties		$ 0
Commercial real estate
Loan modifications to borrowers experiencing financial difficulties
Percent of Total Segment of Financing Receivable	0.08%	0.06%
Weighted Average Interest Rate Reduction	0%	3%
Weighted Average Term Extension Modification (in months)	0 months	0 months
Weighted Average Payment Delay (in months)	6 months	3 months
Combination Weighted Average Payment Delay and Term Extension (in months)	0 months	0 months
Commercial real estate | Current
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 988	$ 426
Commercial real estate | 30 to 59 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	288
Commercial real estate | 60 to 89 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial real estate | Financial Asset, Past Due
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	288
Commercial real estate | Payment Deferral
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	988	288
Commercial real estate | Extended Maturity
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	0
Commercial real estate | Contractual Interest Rate Reduction
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	0	426
Commercial real estate | Combination Payment Delay and Term Extension
Loan modifications to borrowers experiencing financial difficulties
Loan modifications to borrowers experiencing financial difficulties	$ 0	$ 0

Allowance for Credit Losses (De

Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in allowance for loan and lease losses
Balance, beginning of year	$ 147,552	$ 139,268	$ 127,492
Charge-offs	13,730	6,648	3,409
Recoveries	8,055	9,066	1,940
Net charge-offs (recoveries)	5,675	(2,418)	1,469
Provision (recovery of provision)	13,663	5,866	13,245
Balance, end of year	155,540	147,552	139,268
Commercial and agricultural
Changes in allowance for loan and lease losses
Balance, beginning of year	17,385	14,635	15,409
Charge-offs	9,825	4,305	625
Recoveries	418	243	56
Net charge-offs (recoveries)	9,407	4,062	569
Provision (recovery of provision)	13,338	6,812	(205)
Balance, end of year	21,316	17,385	14,635
Renewable energy
Changes in allowance for loan and lease losses
Balance, beginning of year	6,610	7,217	6,585
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Provision (recovery of provision)	1,952	(607)	632
Balance, end of year	8,562	6,610	7,217
Auto and light truck
Changes in allowance for loan and lease losses
Balance, beginning of year	16,858	18,634	19,624
Charge-offs	730	729	118
Recoveries	3,273	5,591	417
Net charge-offs (recoveries)	(2,543)	(4,862)	(299)
Provision (recovery of provision)	(964)	(6,638)	(1,289)
Balance, end of year	18,437	16,858	18,634
Medium and heavy duty truck
Changes in allowance for loan and lease losses
Balance, beginning of year	8,965	7,566	6,015
Charge-offs	0	0	0
Recoveries	0	12	0
Net charge-offs (recoveries)	0	(12)	0
Provision (recovery of provision)	(1,673)	1,387	1,551
Balance, end of year	7,292	8,965	7,566
Aircraft
Changes in allowance for loan and lease losses
Balance, beginning of year	37,653	41,093	33,628
Charge-offs	68	0	0
Recoveries	1,279	967	785
Net charge-offs (recoveries)	(1,211)	(967)	(785)
Provision (recovery of provision)	(2,201)	(4,407)	6,680
Balance, end of year	36,663	37,653	41,093
Construction equipment
Changes in allowance for loan and lease losses
Balance, beginning of year	26,510	24,039	19,673
Charge-offs	1,692	54	1,114
Recoveries	2,100	1,656	17
Net charge-offs (recoveries)	(408)	(1,602)	1,097
Provision (recovery of provision)	1,340	869	5,463
Balance, end of year	28,258	26,510	24,039
Commercial real estate
Changes in allowance for loan and lease losses
Balance, beginning of year	23,690	17,431	19,691
Charge-offs	0	248	538
Recoveries	724	11	45
Net charge-offs (recoveries)	(724)	237	493
Provision (recovery of provision)	407	6,496	(1,767)
Balance, end of year	24,821	23,690	17,431
Residential real estate and home equity
Changes in allowance for loan and lease losses
Balance, beginning of year	7,698	6,478	5,084
Charge-offs	66	101	284
Recoveries	26	334	160
Net charge-offs (recoveries)	40	(233)	124
Provision (recovery of provision)	318	987	1,518
Balance, end of year	7,976	7,698	6,478
Consumer
Changes in allowance for loan and lease losses
Balance, beginning of year	2,183	2,175	1,783
Charge-offs	1,349	1,211	730
Recoveries	235	252	460
Net charge-offs (recoveries)	1,114	959	270
Provision (recovery of provision)	1,146	967	662
Balance, end of year	$ 2,215	$ 2,183	$ 2,175

Allowance for Credit Losses (_2

Allowance for Credit Losses (Details 2) - Unfunded Loan Commitment - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in allowance for loan and lease losses
Balance, beginning of year	$ 8,182	$ 5,616	$ 4,196
(Recovery of provision) provision	(1,197)	2,566	1,420
Balance, end of year	$ 6,985	$ 8,182	$ 5,616

Lease Investments (Details)

Lease Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Minimum lease payments	$ 219,332	$ 247,256
Estimated unguaranteed residual values	0	0
Less: unearned income	(45,064)	(57,927)
Net investment in direct finance lease financing	174,268	189,329
Gross investment in operating lease financing	23,752	41,368
Accumulated depreciation	(12,269)	(21,002)
Net investment in operating lease financings	11,483	20,366
Carrying amount of residual assets covered by residual value guarantees	30,570	48,150
Interest income on lease receivable	13,655	13,553	$ 9,008
Income related to lease payments	5,171	8,837	12,274
Depreciation - leased equipment	4,073	7,093	10,023
Income from reimbursements for personal property tax payments on operating leased equipment	200	270	350
Expense for payments of personal property taxes on operating leased equipment	$ 200	$ 270	$ 350

Lease Investments (Details 2)

Lease Investments (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Direct financing minimum lease payments receivable
2025	$ 56,371
2026	41,695
2027	34,717
2028	30,447
2029	19,880
Thereafter	36,222
Total	219,332	$ 247,256
Operating minimum lease payments receivable
2025	3,094
2026	1,836
2027	930
2028	388
2029	33
Thereafter	0
Total	6,281
Impairment charges on leased equipment	$ 0	$ 0	$ 60

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Premises and equipment
Total premises and equipment	$ 131,064	$ 123,152
Accumulated depreciation and amortization	(77,608)	(76,993)
Net premises and equipment	53,456	46,159
Depreciation and amortization of properties and equipment	4,457	4,452	$ 4,596
Land
Premises and equipment
Total premises and equipment	16,427	15,729
Buildings and improvements
Premises and equipment
Total premises and equipment	71,325	65,526
Furniture and equipment
Premises and equipment
Total premises and equipment	$ 43,312	$ 41,897

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Expected amortization expense on mortgage servicing rights
2025	$ 540
2026	470
2027	400
2028	340
2029	290
Residential mortgage loans
Mortgage Servicing Rights
Unpaid principal balance	$ 777,810	$ 806,050	$ 848,960

Mortgage Servicing Rights (De_2

Mortgage Servicing Rights (Details 2) - Residential mortgage loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in mortgage servicing rights
Balance at the beginning of the period	$ 3,670	$ 4,137
Additions	547	378
Amortization	(781)	(845)
Sales	0	0
Carrying value before valuation allowance at end of year	3,436	3,670	$ 4,137
Changes in valuation allowance
Balance at the beginning of the period	0	0
Impairment recoveries	0	0
Balance at the end of the period	0	0	0
Net carrying value of mortgage servicing rights at end of period	3,436	3,670
Fair value of mortgage servicing rights at end of period	7,480	8,151
Fair value of mortgage servicing rights exceeding the carrying value	4,040
Funds held in trust	8,450	8,070
Mortgage loan contractual servicing fees	$ 2,400	$ 2,540	$ 2,790

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 83,900	$ 83,900
Other intangible assets	0	20
Accumulated amortization on intangible assets	140	120
Intangible asset amortization	20	$ 110	$ 20
Expected amortization on other intangible assets
2025	0
2026	0
2027	0
2028	0
2029	$ 0

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill (Details 2) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Core deposit intangibles and other intangible assets
Less: accumulated amortization	$ (140)	$ (120)
Net carrying amount	0	20
Other intangibles
Core deposit intangibles and other intangible assets
Gross carrying amount	146	146
Less: accumulated amortization	(144)	(125)
Net carrying amount	$ 2	$ 21

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amount of certificates of deposit and other time deposits of $250,000 or more outstanding
Under 3 months	$ 242,056
4-6 months	213,134
7-12 months	222,822
Over 12 months	219,920
Total	897,932	$ 953,090
Maturities of time deposits, including both private and public funds
2025	1,509,036
2026	178,270
2027	68,239
2028	33,119
2029	541
Thereafter	520
Total	$ 1,789,725	$ 1,738,686

Borrowed Funds and Mandatoril_3

Borrowed Funds and Mandatorily Redeemable Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) note	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Borrowed funds and mandatorily redeemable securities
Total long-term debt and mandatorily redeemable securities	$ 39,156	$ 47,911
Annual maturities of long-term debt
2025	2,050
2026	11,940
2027	1,480
2028	850
2029	690
Thereafter	22,140
Mandatorily redeemable securities
Interest expense	2,970	3,600
Interest income			$ (350)
Asset pledged as collateral
Borrowed funds and mandatorily redeemable securities
Collateralized securities for Federal Home Loan Bank borrowings	14,000
Securities subject to mandatory redemption
Borrowed funds and mandatorily redeemable securities
Mandatorily redeemable securities	22,073	21,641
Federal Home Loan Bank borrowings
Borrowed funds and mandatorily redeemable securities
Long-term debt	$ 10,000	20,753
Annual maturities of long-term debt
Number of Federal Home Loan Bank borrowings, fixed rate notes | note	1
Other long-term debt
Borrowed funds and mandatorily redeemable securities
Long-term debt	$ 7,083	$ 5,517
Minimum | Federal Home Loan Bank borrowings
Borrowed funds and mandatorily redeemable securities
Interest rate on Federal Home Loan Bank borrowings (as a percent)	1.04%

Borrowed Funds and Mandatoril_4

Borrowed Funds and Mandatorily Redeemable Securities (Details 2) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Short-term borrowings:
Short-term borrowings	$ 249,198	$ 312,359
Short-term borrowings, weighted average interest rate	3.60%	4.35%
Security repurchase agreements
Short-term borrowings:
Short-term borrowings	$ 72,346	$ 55,809
Short-term borrowings, weighted average interest rate	1.15%	0.37%
Federal Home Loan Bank advances
Short-term borrowings:
Short-term borrowings	$ 75,000	$ 155,000
Short-term borrowings, weighted average interest rate	4.50%	5.51%
Federal Reserve Bank Advances
Short-term borrowings:
Short-term borrowings	$ 100,000	$ 100,000
Short-term borrowings, weighted average interest rate	4.76%	4.83%
Other short-term borrowings
Short-term borrowings:
Short-term borrowings	$ 1,852	$ 1,550
Short-term borrowings, weighted average interest rate	0%	0%

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Subordinated notes
Federal tax credits recognized in tax expense	$ 3,190	$ 2,660	$ 2,060
Investment tax credits	22,740	37,230	$ 9,830
Investment carrying amount	8,931,938	8,727,958
Unfunded capital and other commitments	7,750,432	7,659,695
Unconsolidated maximum exposure to loss	74,242	59,649
Variable interest entity, primary beneficiary
Subordinated notes
Investment carrying amount	78,200	87,370
Unfunded capital and other commitments	0	0
Variable interest entity, not primary beneficiary
Subordinated notes
Investment carrying amount	62,044	79,228
Unfunded capital and other commitments	$ 52,806	$ 80,719

Variable Interest Entities (D_2

Variable Interest Entities (Details 2) $ in Thousands		12 Months Ended
		Dec. 31, 2024 USD ($) trust	Dec. 31, 2023 USD ($)
Variable Interest Entities
Number of trusts sponsored | trust		1
Percentage of ownership interest		100%
Subordinated notes
Amount of subordinated notes		$ 58,764	$ 58,764
June 2007 issuance
Subordinated notes
Amount of subordinated notes		$ 41,238
Interest Rate (as a percent)	[1]	7.22%
Maturity date of subordinated notes		Jun. 15, 2037
August 2007 issuance
Subordinated notes
Amount of subordinated notes		$ 17,526
Interest Rate (as a percent)	[2]	6.10%
Maturity date of subordinated notes		Sep. 15, 2037
Basis Spread on Variable Rate (as a percent)		1.48%
[1]Fixed rate through life of debt.[2]3-Month Term SOFR + the 3-Month tenor spread adjustment + 1.48% through remaining life of debt.

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stock options
Earnings Per Share
Antidilutive securities (in shares)	0	0	0

Earnings Per Share (Details 2)

Earnings Per Share (Details 2) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Distributed earnings allocated to common stock	$ 34,265	$ 32,001	$ 31,095
Undistributed earnings allocated to common stock	97,130	91,735	88,419
Net earnings allocated to common stock	131,395	123,736	119,514
Net earnings allocated to participating securities	1,228	1,191	995
Net income available to common shareholders	$ 132,623	$ 124,927	$ 120,509
Weighted average shares outstanding for basic earnings per common share	24,496,148	24,615,546	24,687,324
Dilutive effect of stock compensation (in shares)	0	0	0
Weighted average shares outstanding for diluted earnings per common share	24,496,148	24,615,546	24,687,324
Basic earnings per common share (in dollars per share)	$ 5.36	$ 5.03	$ 4.84
Diluted earnings per common share (in dollars per share)	$ 5.36	$ 5.03	$ 4.84

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Loss[Line Items]
Losses on investment securities available-for-sale	$ (3,889)	$ (2,926)	$ (184)
Income before income taxes	171,057	161,680	156,787
Income tax expense	(38,439)	(36,746)	(36,255)
Net income	132,618	124,934	$ 120,532
Unrealized gains and losses on available-for-sale securities | Amount reclassified from Accumulated Other Comprehensive Loss
Reclassification Adjustment out of Accumulated Other Comprehensive Loss[Line Items]
Losses on investment securities available-for-sale	(3,889)	(2,926)
Income before income taxes	(3,889)	(2,926)
Income tax expense	874	665
Net income	$ (3,015)	$ (2,261)

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - Employee Stock Ownership and Profit Sharing Plan $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) h shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)
Employee benefit plans
Minimum service period required to participate in Plan	90 days
Percentage of employee's deferred compensation up to which the employer matches (as a percent)	4%
Employer's matching contribution on the next 2% of employee contribution (as a percent)	50%
Employee contribution after matching contribution of employer (as a percent)	2%
Employee's eligible compensation on which employer pays fixed contribution (as a percent)	2%
Common stock held in relation to employee benefit plans (in shares) | shares	699,883	707,404
Minimum service period required to be eligible to get employer's contribution	5 years
Minimum working hours required per year to be eligible to get employer's contribution | h	1,000
Employee deferral that is always vested (as a percent)	100%
Contribution expense	$ 6,530	$ 6,760	$ 6,220
Accumulated Plan forfeitures utilized to offset employer contribution expense	$ 650

Stock Based Compensation (Detai

Stock Based Compensation (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) plan $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Stock-based compensation
Number of stock-based employee compensation plans | plan	4
Number of executive stock award plans | plan	3
Total fair value of share awards vested | $	$ 4,730,000	$ 3,560,000	$ 4,080,000
Shares Available for Grant
Balance at the beginning of the period (in shares)	661,548	730,191	560,755
Granted (in shares)	(78,600)	(157,485)	(127,198)
Forfeited (in shares)	9,450	1,571	9,131
Balance at the end of the period (in shares)	666,067	661,548	730,191
Stock award plans
Additional disclosures
Stock-based compensation expense | $	$ 5,650,000	$ 4,890,000	$ 3,590,000
Income tax benefit due to stock-based compensation expenses | $	1,270,000	$ 1,110,000	$ 830,000
Unrecognized stock-based compensation expense | $	$ 9,430,000
Weighted-average period for unrecognized compensation cost to recognize	3 years 1 month 9 days
Executive Incentive Plan
Shares Available for Grant
Shares authorized	73,669	87,271	287,503
Additional disclosures
Vesting period	5 years
1982 Restricted Stock Plan | Maximum
Additional disclosures
Vesting period	10 years
Strategic Deployment Incentive Plan
Additional disclosures
Vesting period	5 years
Stock options
Additional disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	0
Stock-based compensation expense | $	$ 0	$ 0	$ 0
Stock options | Maximum
Additional disclosures
Contractual life	10 years
Non-vested stock awards outstanding
Number of Shares
Stock awards outstanding at the beginning of the period (in shares)	351,247	288,525	274,146
Granted (in shares)	78,600	157,485	127,198
Vested (in shares)	(104,307)	(89,352)	(97,640)
Forfeited (in shares)	(14,802)	(5,411)	(15,179)
Stock awards outstanding at the end of the period (in shares)	310,738	351,247	288,525
Weighted-Average Grant-Date Fair Value
Stock awards outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 39.61	$ 37.03	$ 34.86
Granted (in dollars per share) | $ / shares	41.49	41.75	40.44
Vested (in dollars per share) | $ / shares	37.98	35.14	34.92
Forfeited (in dollars per share) | $ / shares	45.52	37.91	36.53
Stock awards outstanding at the end of the period (in dollars per share) | $ / shares	$ 40.35	39.61	37.03
Employee Stock Purchase Plan
Additional disclosures
Required period of service	2 years
Maximum base rate of employee basic pay to purchase any dollar amount of stock (as a percent)	25%
Maximum stock which can be purchased by employee per year | $	$ 25,000
Purchases price (in dollars per share) | $ / shares	$ 51.21	$ 41.64	$ 46.78
Percentage of the premium fair market value of common stock as on the offering date or the market value as on the purchase date (as a percent)			(0.34%)
Percentage of the discount fair market value of common stock as on the offering date or the market value as on the purchase date (as a percent)	(0.49%)	(0.50%)
ESPP offering through June 2022
Additional disclosures
Value of shares to be purchased | $	$ 173,860
Stock value of most recent offering (in dollars per share ) | $ / shares	$ 51.21

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 31,826	$ 40,073	$ 38,779
State	4,181	6,135	6,937
Total current	36,007	46,208	45,716
Deferred:
Federal	2,044	(7,917)	(7,936)
State	388	(1,545)	(1,525)
Total deferred	2,432	(9,462)	(9,461)
Total provision	$ 38,439	$ 36,746	$ 36,255
Statutory federal income tax (as a percent)	21%	21%	21%

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reasons for the difference between income tax expense and statutory federal income tax
Statutory federal income tax	$ 35,922,000	$ 33,953,000	$ 32,925,000
Tax-exempt interest income	(465,000)	(592,000)	(504,000)
State taxes, net of federal income tax benefit	3,610,000	3,626,000	4,275,000
Other	(628,000)	(241,000)	(441,000)
Total provision	$ 38,439,000	$ 36,746,000	$ 36,255,000
Reasons for the difference between income tax expense rate and statutory federal income tax rate
Statutory federal income tax (as a percent)	21%	21%	21%
Tax-exempt interest income (as a percent)	(0.30%)	(0.40%)	(0.30%)
State taxes, net of federal income tax benefit (as a percent)	2.10%	2.20%	2.70%
Other (as a percent)	(0.30%)	(0.10%)	(0.30%)
Total income tax expense (benefit) (as a percent)	22.50%	22.70%	23.10%
Deferred tax assets:
Reserve for loan and lease losses	$ 34,738,000	$ 34,957,000
Operating lease liability	4,371,000	4,675,000
Accruals for employee benefits	4,361,000	4,103,000
Capitalized loan costs	0	1,658,000
Net unrealized losses on securities available-for-sale	27,153,000	33,433,000
Other	1,838,000	2,405,000
Total deferred tax assets	72,461,000	81,231,000
Deferred tax liabilities:
Differing depreciable bases in premises and leased equipment	4,782,000	5,198,000
Right of use assets - leases	5,075,000	5,224,000
Differing bases in assets related to acquisitions	4,335,000	4,308,000
Tax advantaged partnerships	574,000	0
Other	2,152,000	2,246,000
Total deferred tax liabilities	16,918,000	16,976,000
Deferred Tax Assets, Net, Total	55,543,000	64,255,000
Valuation allowance for deferred tax assets	0	0
Investment securities available-for-sale
Reasons for the difference between income tax expense and statutory federal income tax
Total provision	$ (937,000)	$ (720,000)	$ (39,000)

Contingent Liabilities, Commi_3

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Liability for repurchases	$ 120	$ 100
Operating lease right of use assets	21,076	21,692
Operating lease liabilities	$ 18,150	$ 19,413
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Accrued income and other assets	Accrued income and other assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued expenses and other liabilities	Accrued expenses and other liabilities

Contingent Liabilities, Commi_4

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) Rate	Dec. 31, 2023 USD ($) Rate	Dec. 31, 2022 USD ($) Rate
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 3,855	$ 3,721	$ 3,527
Short-term lease cost	0	9	18
Variable lease cost	9	8	8
Total operating lease cost	3,864	3,738	$ 3,553
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2025	4,270
2026	3,730
2027	3,028
2028	1,784
2029	1,701
Thereafter	7,468
Total lease payments	21,981
Imputed interest	(3,831)
Operating lease liabilities	$ 18,150	$ 19,413
Weighted average remaining lease term	8 years 11 months 8 days	9 years 3 months 21 days	9 years 3 months 29 days
Weighted average discount rate | Rate	4.34%	4.28%	1.85%
Operating cash flows from operating leases	$ 4,509	$ 4,508	$ 4,298
Number of significant lessee leases that have not yet commenced	0

Contingent Liabilities, Commi_5

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet instruments	$ 1,304,735	$ 1,454,506
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet instruments	$ 21,828	17,287
Standby letters of credit | Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letter of credit term	2 months
Standby letters of credit | Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letter of credit term	1 year
Commercial and similar letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet instruments	$ 161	$ 7,047
Commercial and similar letters of credit | Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letter of credit term	2 months
Commercial and similar letters of credit | Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letter of credit term	6 months

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	$ 1,091,759	$ 1,091,942
Asset derivatives, Fair value	16,559	22,811
Liability derivatives, Fair value	16,727	23,156
Interest rate swap contracts
Derivative Financial Instruments
Asset derivatives, Fair value	16,424	22,704
Interest rate swap contracts | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	1,083,673	1,085,618
Asset derivatives, Fair value	16,424	22,704
Liability derivatives, Fair value	16,727	23,140
Loan commitments | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	3,586	2,824
Asset derivatives, Fair value	118	107
Liability derivatives, Fair value	0	0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	4,500	3,500
Asset derivatives, Fair value	17	0
Liability derivatives, Fair value	$ 0	$ 16

Derivative Financial Instrume_4

Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Financial Instruments
Gain (loss)	$ 1,008	$ 1,343	$ (299)
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	133	33	(32)
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	831	1,310	83
Loan commitments
Derivative Financial Instruments
Gain (loss)	11	40	(385)
Forward contracts - mortgage loan
Derivative Financial Instruments
Gain (loss)	$ 33	$ (40)	$ 35

Derivative Financial Instrume_5

Derivative Financial Instruments (Details 3) - Interest rate swap contracts - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Offsetting Assets
Gross Amounts of Recognized Assets	$ 16,424	$ 22,704
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	16,424	22,704
Gross Amounts Not Offset in the Statement of Financial Condition
Financial instruments	0	0
Cash collateral received	12,615	10,795
Net Amount	$ 3,809	$ 11,909

Derivative Financial Instrume_6

Derivative Financial Instruments (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ 89,072	$ 78,949
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts Offset in the Statement of Financial Condition	$ 89,072	$ 78,949
Derivative Liability Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	Net Amounts of Liabilities Presented in the Statement of Financial Condition	Net Amounts of Liabilities Presented in the Statement of Financial Condition
Gross Amounts Not Offset in the Statement of Financial Condition
Financial Instruments	$ 72,345	$ 55,809
Cash Collateral Pledged	0	0
Net Amount	16,727	23,140
Interest rate swap contracts
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	16,727	23,140
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts Offset in the Statement of Financial Condition	16,727	23,140
Derivative, Collateral, Right to Reclaim Securities	0	0
Gross Amounts Not Offset in the Statement of Financial Condition
Cash Collateral Pledged	0	0
Net Amount	16,727	23,140
Repurchase agreements
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	72,345	55,809
Net Amounts Offset in the Statement of Financial Condition	72,345	55,809
Gross Amounts Not Offset in the Statement of Financial Condition
Financial Instruments	$ 72,345	$ 55,809

Derivative Financial Instrume_7

Derivative Financial Instruments (Details 5) - U.S. Treasury and Federal agencies securities - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 72,300	$ 54,460
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 50	$ 1,350

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Total Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,345,500	$ 1,248,905
Actual Ratio (as a percent)	0.1708	0.1625
Minimum Capital Adequacy Amount	$ 630,028	$ 614,880
Minimum Capital Adequacy Ratio (as a percent)	0.0800	0.0800
Minimum Capital Adequacy with Capital Buffer Amount	$ 826,912	$ 807,031
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.1050	0.1050
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 787,535	$ 768,601
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.1000	0.1000
Tier I Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,246,267	$ 1,152,093
Actual Ratio (as a percent)	0.1582	0.1499
Minimum Capital Adequacy Amount	$ 472,521	$ 461,160
Minimum Capital Adequacy Ratio (as a percent)	0.0600	0.0600
Minimum Capital Adequacy with Capital Buffer Amount	$ 669,405	$ 653,311
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0850	0.0850
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 630,028	$ 614,880
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0800	0.0800
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,118,829	$ 1,016,398
Actual Ratio (as a percent)	0.1421	0.1322
Minimum Capital Adequacy Amount	$ 354,391	$ 345,870
Minimum Capital Adequacy Ratio (as a percent)	0.0450	0.0450
Minimum Capital Adequacy with Capital Buffer Amount	$ 551,274	$ 538,020
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0700	0.0700
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 511,898	$ 499,590
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0650	0.0650
Tier I Capital (to Average Assets):
Actual Amount	$ 1,246,267	$ 1,152,093
Actual Ratio (as a percent)	0.1405	0.1326
Minimum Capital Adequacy Amount	$ 354,927	$ 347,512
Minimum Capital Adequacy Ratio (as a percent)	0.0400	0.0400
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 443,659	$ 434,390
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0500	0.0500
1st Source Bank
Total Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,246,610	$ 1,168,672
Actual Ratio (as a percent)	0.1583	0.1521
Minimum Capital Adequacy Amount	$ 630,034	$ 614,547
Minimum Capital Adequacy Ratio (as a percent)	0.0800	0.0800
Minimum Capital Adequacy with Capital Buffer Amount	$ 826,920	$ 806,593
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.1050	0.1050
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 787,543	$ 768,184
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.1000	0.1000
Tier I Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,147,376	$ 1,071,912
Actual Ratio (as a percent)	0.1457	0.1395
Minimum Capital Adequacy Amount	$ 472,526	$ 460,910
Minimum Capital Adequacy Ratio (as a percent)	0.0600	0.0600
Minimum Capital Adequacy with Capital Buffer Amount	$ 669,412	$ 652,956
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0850	0.0850
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 630,034	$ 614,547
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0800	0.0800
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
Actual Amount	$ 1,076,938	$ 993,217
Actual Ratio (as a percent)	0.1367	0.1293
Minimum Capital Adequacy Amount	$ 354,394	$ 345,683
Minimum Capital Adequacy Ratio (as a percent)	0.0450	0.0450
Minimum Capital Adequacy with Capital Buffer Amount	$ 551,280	$ 537,729
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0700	0.0700
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 511,903	$ 499,319
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0650	0.0650
Tier I Capital (to Average Assets):
Actual Amount	$ 1,147,376	$ 1,071,912
Actual Ratio (as a percent)	0.1293	0.1234
Minimum Capital Adequacy Amount	$ 354,822	$ 347,397
Minimum Capital Adequacy Ratio (as a percent)	0.0400	0.0400
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 443,528	$ 434,246
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.0500	0.0500

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Fair value measurements
Fair value carrying amount		$ 2,569	$ 1,442
Mortgages held for sale reported at fair value
Fair value measurements
Fair value carrying amount		2,569	1,442
Aggregate unpaid principal		2,343	1,297
Excess of fair value carrying amount over (under) unpaid principal	[1]	$ 226	$ 145
[1]The excess of fair value carrying amount over (under) unpaid principal is included in mortgage banking income and includes changes in fair value at and subsequent to funding and gains and losses on the related loan commitment prior to funding.

Fair Value Measurements (Deta_2

Fair Value Measurements (Details 2) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair value measurements
Investment securities available for sale	$ 1,536,299	$ 1,622,600
Assets:
Mortgages held for sale	2,569	1,442
U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available for sale	757,749	922,866
U.S. States and political subdivisions securities
Fair value measurements
Investment securities available for sale	82,632	92,564
Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available for sale	695,918	598,252
Corporate debt securities
Fair value measurements
Investment securities available for sale	0	8,329
Foreign government and other securities
Fair value measurements
Investment securities available for sale	0	589
Total
Fair value measurements
Investment securities available for sale	1,536,299	1,622,600
Assets:
Mortgages held for sale	2,569	1,442
Level 1
Fair value measurements
Investment securities available for sale	446,021	541,461
Assets:
Mortgages held for sale	0	0
Level 2
Fair value measurements
Investment securities available for sale	1,089,246	1,079,978
Assets:
Mortgages held for sale	2,569	1,442
Level 3
Fair value measurements
Investment securities available for sale	1,032	1,161
Assets:
Mortgages held for sale	0	0
Recurring | Total
Fair value measurements
Investment securities available for sale	1,536,299	1,622,600
Assets:
Mortgages held for sale	2,569	1,442
Accrued income and other assets	16,424	22,704
Total	1,555,292	1,646,746
Liabilities:
Accrued expenses and other liabilities	16,727	23,140
Total	16,727	23,140
Recurring | Total | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available for sale	757,749	922,866
Recurring | Total | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available for sale	82,632	92,564
Recurring | Total | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available for sale	695,918	598,252
Recurring | Total | Corporate debt securities
Fair value measurements
Investment securities available for sale	0	8,329
Recurring | Total | Foreign government and other securities
Fair value measurements
Investment securities available for sale	0	589
Recurring | Level 1
Fair value measurements
Investment securities available for sale	446,021	541,461
Assets:
Mortgages held for sale	0	0
Accrued income and other assets	0	0
Total	446,021	541,461
Liabilities:
Accrued expenses and other liabilities	0	0
Total	0	0
Recurring | Level 1 | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available for sale	446,021	541,461
Recurring | Level 1 | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 1 | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 1 | Corporate debt securities
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 1 | Foreign government and other securities
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 2
Fair value measurements
Investment securities available for sale	1,089,246	1,079,978
Assets:
Mortgages held for sale	2,569	1,442
Accrued income and other assets	16,424	22,704
Total	1,108,239	1,104,124
Liabilities:
Accrued expenses and other liabilities	16,727	23,140
Total	16,727	23,140
Recurring | Level 2 | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available for sale	311,728	381,405
Recurring | Level 2 | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available for sale	81,600	91,403
Recurring | Level 2 | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available for sale	695,918	598,252
Recurring | Level 2 | Corporate debt securities
Fair value measurements
Investment securities available for sale	0	8,329
Recurring | Level 2 | Foreign government and other securities
Fair value measurements
Investment securities available for sale	0	589
Recurring | Level 3
Fair value measurements
Investment securities available for sale	1,032	1,161
Assets:
Mortgages held for sale	0	0
Accrued income and other assets	0	0
Total	1,032	1,161
Liabilities:
Accrued expenses and other liabilities	0	0
Total	0	0
Recurring | Level 3 | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 3 | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available for sale	1,032	1,161
Recurring | Level 3 | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 3 | Corporate debt securities
Fair value measurements
Investment securities available for sale	0	0
Recurring | Level 3 | Foreign government and other securities
Fair value measurements
Investment securities available for sale	$ 0	$ 0

Fair Value Measurements (Deta_3

Fair Value Measurements (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Changes in the fair value of Level 3 assets measured on a recurring basis
Total gains or losses (unrealized): included in earnings	$ 0	$ 0
U.S. States and political subdivisions securities
Changes in the fair value of Level 3 assets measured on a recurring basis
Balance at the beginning of the period	1,161,000	1,464,000
Total gains or losses (realized/unrealized): included in earnings	0	0
Total gains or losses (realized/unrealized): included in other comprehensive income	51,000	(43,000)
Purchases	0	3,000,000
Issuances	0	0
Sales	0	0
Settlements	0	0
Maturities	(180,000)	(3,260,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at the end of the period	$ 1,032,000	$ 1,161,000

Fair Value Measurements (Deta_4

Fair Value Measurements (Details 4) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Valuation Methodology
Investment securities available for sale	$ 1,536,299	$ 1,622,600
Level 3
Valuation Methodology
Investment securities available for sale	1,032	1,161
Recurring | Level 3
Valuation Methodology
Investment securities available for sale	1,032	1,161
Recurring | Level 3 | Discounted cash flows | Direct placement municipal securities
Valuation Methodology
Investment securities available for sale	$ 1,032	$ 1,161
Discount for lack of marketability | Non-recurring | Level 3 | Trade publications | Aircraft
Unobservable Inputs
Discount rate (as a percent)	0.10
Discount for lack of marketability | Non-recurring | Level 3 | Auction values | Autos
Unobservable Inputs
Discount rate (as a percent)	0.10
Discount for lack of marketability | Non-recurring | Level 3 | Trade publications and auction values | Medium and heavy duty trucks
Unobservable Inputs
Discount rate (as a percent)	0.15
Discount for lack of marketability | Non-recurring | Level 3 | Trade publications and auction values | Construction equipment
Unobservable Inputs
Discount rate (as a percent)	0.20
Discount for lack of marketability | Non-recurring | Level 3 | Appraisals | Real estate
Unobservable Inputs
Discount rate (as a percent)	0.20
Credit spread assumption | Recurring | Level 3 | Discounted cash flows | Direct placement municipal securities | Minimum
Unobservable Inputs
Debt securities available-for-sale unobservable inputs (as a percent)	0.0115	0.0031
Credit spread assumption | Recurring | Level 3 | Discounted cash flows | Direct placement municipal securities | Maximum
Unobservable Inputs
Debt securities available-for-sale unobservable inputs (as a percent)	0.0459	0.0528
Credit spread assumption | Recurring | Level 3 | Discounted cash flows | Direct placement municipal securities | Weighted Average [Member]
Unobservable Inputs
Debt securities available-for-sale unobservable inputs (as a percent)	0.0396	0.0428
Receivables | Discount for lack of marketability | Non-recurring | Level 3 | Commercial loans
Unobservable Inputs
Discount rate (as a percent)	0.20
Inventory | Discount for lack of marketability | Non-recurring | Level 3 | Minimum | Commercial loans
Unobservable Inputs
Discount rate (as a percent)	0.40
Inventory | Discount for lack of marketability | Non-recurring | Level 3 | Maximum | Commercial loans
Unobservable Inputs
Discount rate (as a percent)	0.75

Fair Value Measurements (Deta_5

Fair Value Measurements (Details 5) - Non-recurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Collateral-dependent impaired loans
Fair value measurements
Impairment charges	$ 10,430	$ 4,280
Mortgage servicing rights
Fair value measurements
Impairment charges	0
Impairment recoveries		0
Repossessions
Fair value measurements
Impairment charges	30	0
Other real estate
Fair value measurements
Impairment charges	0	0
Total
Fair value measurements
Collateral-dependent impaired loans	725	6,289
Assets measured at fair value	4,776	10,664
Total | Mortgage servicing rights
Fair value measurements
Accrued income and other assets	3,436	3,670
Total | Repossessions
Fair value measurements
Accrued income and other assets	155	705
Total | Other real estate
Fair value measurements
Accrued income and other assets	460	0
Level 3
Fair value measurements
Collateral-dependent impaired loans	725	6,289
Assets measured at fair value	4,776	10,664
Level 3 | Mortgage servicing rights
Fair value measurements
Accrued income and other assets	3,436	3,670
Level 3 | Repossessions
Fair value measurements
Accrued income and other assets	155	705
Level 3 | Other real estate
Fair value measurements
Accrued income and other assets	$ 460	$ 0

Fair Value Measurements (Deta_6

Fair Value Measurements (Details 6) - Non-recurring $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Level 3
Valuation Methodology
Assets measured at fair value	$ 4,776	$ 10,664
Carrying Value | Level 3 | Collateral based measurements | Collateral-dependent impaired loans
Valuation Methodology
Assets measured at fair value	725	6,289
Carrying Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	3,436	3,670
Carrying Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	155	705
Carrying Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	460	0
Fair Value
Valuation Methodology
Assets measured at fair value	4,776	10,664
Fair Value | Level 3 | Collateral based measurements | Collateral-dependent impaired loans
Valuation Methodology
Assets measured at fair value	725	6,289
Fair Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	7,480	8,151
Fair Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	170	757
Fair Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	$ 500	$ 0
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Collateral-dependent impaired loans | Minimum
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0.25	0.10
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Collateral-dependent impaired loans | Maximum
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0.30	0.20
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Collateral-dependent impaired loans | Weighted Average [Member]
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0.280	0.139
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.076	0.061
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.230	0.176
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Weighted Average [Member]
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.076	0.073
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.111	0.110
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.131	0.131
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Weighted Average [Member]
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.113	0.112
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Minimum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0	0
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Maximum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0.10	0.10
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Weighted Average [Member]
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0.09	0.08
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Minimum
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0	0
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Maximum
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0.08	0
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Weighted Average [Member]
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0.08	0

Fair Value Measurements (Deta_7

Fair Value Measurements (Details 7) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Assets:
Cash and due from banks		$ 76,837	$ 77,474
Federal funds sold and interest bearing deposits with other banks		47,989	52,194
Investment securities available for sale		1,536,299	1,622,600
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		23,855	25,075
Mortgages held for sale		2,569	1,442
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		6,699,268	6,370,953
Liabilities:
Long-term debt and mandatorily redeemable securities		39,156	47,911
Subordinated notes		58,764	58,764
Carrying or Contract Value
Assets:
Cash and due from banks		76,837	77,474
Federal funds sold and interest bearing deposits with other banks		47,989	52,194
Investment securities available for sale		1,536,299	1,622,600
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		23,855	25,075
Mortgages held for sale		2,569	1,442
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		6,699,268	6,370,953
Mortgage servicing rights		3,436	3,670
Interest receivable		32,790	30,232
Interest rate swaps		16,424	22,704
Liabilities:
Deposits		7,230,035	7,038,581
Short-term borrowings		249,198	312,359
Long-term debt and mandatorily redeemable securities		39,156	47,911
Subordinated notes		58,764	58,764
Interest payable		36,494	29,520
Interest rate swaps		16,727	23,140
Off-balance-sheet instruments	[1]	0	0
Fair Value
Assets:
Cash and due from banks		76,837	77,474
Federal funds sold and interest bearing deposits with other banks		47,989	52,194
Investment securities available for sale		1,536,299	1,622,600
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		23,855	25,075
Mortgages held for sale		2,569	1,442
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		6,608,109	6,204,791
Mortgage servicing rights		7,480	8,151
Interest receivable		32,790	30,232
Interest rate swaps		16,424	22,704
Liabilities:
Deposits		7,226,239	7,033,549
Short-term borrowings		249,198	312,359
Long-term debt and mandatorily redeemable securities		38,784	47,098
Subordinated notes		56,903	55,842
Interest payable		36,494	29,520
Interest rate swaps		16,727	23,140
Off-balance-sheet instruments	[1]	144	120
Level 1
Assets:
Cash and due from banks		76,837	77,474
Federal funds sold and interest bearing deposits with other banks		47,989	52,194
Investment securities available for sale		446,021	541,461
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		23,855	25,075
Mortgages held for sale		0	0
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		0	0
Mortgage servicing rights		0	0
Interest receivable		0	0
Interest rate swaps		0	0
Liabilities:
Deposits		5,440,309	5,299,896
Short-term borrowings		74,198	56,013
Long-term debt and mandatorily redeemable securities		0	0
Subordinated notes		0	0
Interest payable		0	0
Interest rate swaps		0	0
Off-balance-sheet instruments	[1]	0	0
Level 2
Assets:
Cash and due from banks		0	0
Federal funds sold and interest bearing deposits with other banks		0	0
Investment securities available for sale		1,089,246	1,079,978
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		0	0
Mortgages held for sale		2,569	1,442
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		0	0
Mortgage servicing rights		0	0
Interest receivable		32,790	30,232
Interest rate swaps		16,424	22,704
Liabilities:
Deposits		1,785,930	1,733,653
Short-term borrowings		175,000	256,346
Long-term debt and mandatorily redeemable securities		38,784	47,098
Subordinated notes		56,903	55,842
Interest payable		36,494	29,520
Interest rate swaps		16,727	23,140
Off-balance-sheet instruments	[1]	144	120
Level 3
Assets:
Cash and due from banks		0	0
Federal funds sold and interest bearing deposits with other banks		0	0
Investment securities available for sale		1,032	1,161
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		0	0
Mortgages held for sale		0	0
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss		6,608,109	6,204,791
Mortgage servicing rights		7,480	8,151
Interest receivable		0	0
Interest rate swaps		0	0
Liabilities:
Deposits		0	0
Short-term borrowings		0	0
Long-term debt and mandatorily redeemable securities		0	0
Subordinated notes		0	0
Interest payable		0	0
Interest rate swaps		0	0
Off-balance-sheet instruments	[1]	$ 0	$ 0
[1]Represents estimated cash outflows required to currently settle the obligations at current market rates.

1st Source Corporation (Paren_3

1st Source Corporation (Parent Company Only) Financial Information (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Operating lease right of use assets	$ 21,076	$ 21,692
Other assets	396,285	427,779
Total assets	8,931,938	8,727,958
LIABILITIES AND SHAREHOLDERS' EQUITY
Long-term debt and mandatorily redeemable securities	39,156	47,911
Subordinated notes	58,764	58,764
Operating lease liabilities	18,150	19,413
Other liabilities	173,279	202,080
Unfunded capital and other commitments	7,750,432	7,659,695
Total shareholders’ equity	1,111,068	989,568
Total liabilities and shareholders’ equity	8,931,938	8,727,958
Parent
ASSETS
Cash and cash equivalents	126,889	105,889	$ 104,678	$ 94,543
Operating lease right of use assets	12,552	13,895
Other assets	6,500	6,821
Total assets	1,214,920	1,092,794
LIABILITIES AND SHAREHOLDERS' EQUITY
Long-term debt and mandatorily redeemable securities	29,156	27,158
Subordinated notes	58,764	58,764
Operating lease liabilities	9,682	11,682
Other liabilities	6,250	5,622
Unfunded capital and other commitments	103,852	103,226
Total shareholders’ equity	1,111,068	989,568
Total liabilities and shareholders’ equity	1,214,920	1,092,794
Parent | Bank subsidiaries
ASSETS
Short-term investments with bank subsidiary	500	500
Investments in subsidiary	1,068,478	965,688
Parent | Non-bank subsidiaries
ASSETS
Investments in subsidiary	$ 1	$ 1

1st Source Corporation (Paren_4

1st Source Corporation (Parent Company Only) Financial Information (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income:
Operating Lease Income Comprehensive Income Extensible List Not Disclosed Flag	Rental income from subsidiaries	Rental income from subsidiaries	Rental income from subsidiaries
Investment securities and other investment gains	$ 16,714	$ 19,895	$ 15,042
Expenses:
Interest on subordinated notes	4,217	4,174	3,550
Interest on long-term debt and mandatorily redeemable securities	3,165	3,892	69
Interest on commercial paper and other short-term borrowings	8,976	7,032	1,497
Occupancy	11,939	11,090	10,728
Other	12,385	17,433	14,287
Income before income taxes	171,057	161,680	156,787
Income tax benefit	(38,439)	(36,746)	(36,255)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	151,714	166,294	(17,320)
Parent
Income:
Rental income from subsidiaries	1,961	1,832	1,740
Investment securities and other investment gains	307	239	148
Other	124	261	353
Total income	57,615	52,484	51,829
Expenses:
Interest on subordinated notes	4,217	4,174	3,550
Interest on long-term debt and mandatorily redeemable securities	3,008	3,606	(341)
Interest on commercial paper and other short-term borrowings	0	2	1
Occupancy	1,826	1,718	1,625
Other	926	917	890
Total expenses	9,977	10,417	5,725
Income before income taxes	47,638	42,067	46,104
Income tax benefit	1,287	1,246	1,099
Income before equity in undistributed income of subsidiaries	48,925	43,313	47,203
Equity in undistributed income of subsidiaries	83,693	81,621	73,329
Net income	132,618	124,934	120,532
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	151,709	166,301	(17,297)
Parent | Bank subsidiaries
Income:
Dividends from bank subsidiary	55,223	50,152	49,588
Expenses:
Equity in undistributed income of subsidiaries	$ 83,693	$ 81,621	$ 73,329

1st Source Corporation (Paren_5

1st Source Corporation (Parent Company Only) Financial Information (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	$ 4,457	$ 4,452	$ 4,596
Amortization of right of use assets	3,050	3,073	3,181
Stock-based compensation	5,655	4,891	3,587
Other	185	(2,959)	(4,006)
Investing activities:
Net change in partnership investments	(34,404)	(51,121)	(18,292)
Financing activities:
Payments on long-term debt and mandatorily redeemable securities	(12,630)	(3,450)	(25,530)
Stock issued under stock purchase plans	153	78	252
Acquisition of treasury stock	(178)	(12,469)	(6,836)
Cash dividends paid on common stock	(35,396)	(33,074)	(32,102)
Parent Company
1st Source Corporation (Parent Company Only) Financial Information
Net income	132,618	124,934	120,532
Adjustments to reconcile net income to net cash provided by operating activities:
Equity (undistributed) distributed in excess of income of subsidiaries	(83,693)	(81,621)	(73,329)
Amortization of right of use assets	1,343	1,354	1,376
Stock-based compensation	142	152	120
Realized/unrealized investment securities and other investment gains	(124)	(261)	(353)
Other	1,326	2,863	(702)
Net change in operating activities	51,612	47,421	47,644
Investing activities:
Net change in partnership investments	260	(246)	102
Net change in investing activities	260	(246)	102
Financing activities:
Net change in commercial paper	0	(3,096)	(871)
Proceeds from issuance of long-term debt and mandatorily redeemable securities	2,374	1,908	1,862
Payments on long-term debt and mandatorily redeemable securities	(1,884)	(2,887)	(2,708)
Stock issued under stock purchase plans	153	78	252
Net proceeds from issuance of treasury stock	4,059	3,576	2,792
Acquisition of treasury stock	(178)	(12,469)	(6,836)
Cash dividends paid on common stock	(35,396)	(33,074)	(32,102)
Net change in financing activities	(30,872)	(45,964)	(37,611)
Net change in cash and cash equivalents	21,000	1,211	10,135
Cash and cash equivalents, beginning of year	105,889	104,678	94,543
Cash and cash equivalents, end of year	$ 126,889	$ 105,889	$ 104,678