1st Source (SRCE) 10-K 18 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 12, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
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	No
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			$ 695,302,047
Entity Common Stock, Shares Outstanding		25,301,678
Documents Incorporated by Reference	Portions of the 2021 Proxy Statement for the 2021 annual meeting of shareholders to be held April 22, 2021, are incorporated by reference into Part III.
Entity Central Index Key	0000034782
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
ICFR Auditor Attestation Flag	true

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 74,186	$ 67,215
Federal funds sold and interest bearing deposits with other banks	168,861	16,150
Investment securities available-for-sale	1,197,467	1,040,583
Other investments	27,429	28,414
Mortgages held for sale	12,885	20,277
Loans and leases, net of unearned discount:
Total loans and leases	5,489,301	5,085,527
Allowance for loan and lease losses	(140,654)	(111,254)
Net loans and leases	5,348,647	4,974,273
Equipment owned under operating leases, net	65,040	111,684
Net premises and equipment	49,373	52,219
Goodwill and intangible assets	83,948	83,971
Accrued income and other assets	288,575	227,990
Total assets	7,316,411	6,622,776
Deposits:
Noninterest-bearing demand	1,636,684	1,216,834
Interest-bearing demand	2,059,139	1,677,200
Savings	1,082,848	814,794
Time	1,167,357	1,648,498
Total interest-bearing deposits	4,309,344	4,140,492
Total deposits	5,946,028	5,357,326
Short-term borrowings:
Federal funds purchased and securities sold under agreements to repurchase	143,564	120,459
Other short-term borrowings	7,077	25,434
Total short-term borrowings	150,641	145,893
Long-term debt and mandatorily redeemable securities	81,864	71,639
Subordinated notes	58,764	58,764
Accrued expenses and other liabilities	148,444	140,518
Total liabilities	6,385,741	5,774,140
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, 2020 and 2019	436,538	436,538
Retained earnings	514,176	463,269
Cost of common stock in treasury (2,816,557 shares at December 31, 2020 and 2,696,200 shares at December 31, 2019)	(82,240)	(76,702)
Accumulated other comprehensive income	18,371	5,172
Total shareholders’ equity	886,845	828,277
Noncontrolling interests	43,825	20,359
Total equity	930,670	848,636
Total liabilities and equity	$ 7,316,411	$ 6,622,776
Preferred Stock, Par or Stated Value Per Share	$ 0	$ 0
Preferred stock, Authorized shares	10,000,000	10,000,000
Preferred stock, issued shares	0	0
Common Stock, Par or Stated Value Per Share	$ 0	$ 0
Common stock, Authorized shares	40,000,000	40,000,000
Common stock, issued shares	28,205,674	28,205,674
Cost of common stock in treasury, shares	2,816,557	2,696,200
Commercial and agricultural
Loans and leases, net of unearned discount:
Total loans and leases	$ 1,478,722	$ 1,132,791
Allowance for loan and lease losses	(22,229)	(23,671)
Auto and light truck
Loans and leases, net of unearned discount:
Total loans and leases	542,369	588,807
Allowance for loan and lease losses	(28,926)	(14,400)
Medium and heavy duty truck
Loans and leases, net of unearned discount:
Total loans and leases	279,172	294,824
Allowance for loan and lease losses	(6,400)	(4,612)
Aircraft
Loans and leases, net of unearned discount:
Total loans and leases	861,460	784,040
Allowance for loan and lease losses	(34,053)	(31,058)
Construction equipment
Loans and leases, net of unearned discount:
Total loans and leases	714,888	705,451
Allowance for loan and lease losses	(19,166)	(14,120)
Commercial real estate
Loans and leases, net of unearned discount:
Total loans and leases	969,864	908,177
Allowance for loan and lease losses	(22,758)	(18,350)
Residential real estate and home equity
Loans and leases, net of unearned discount:
Total loans and leases	511,379	532,003
Allowance for loan and lease losses	(5,374)	(3,609)
Consumer
Loans and leases, net of unearned discount:
Total loans and leases	131,447	139,434
Allowance for loan and lease losses	$ (1,748)	$ (1,434)

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans and leases	$ 242,772	$ 258,348	$ 234,455
Investment securities, taxable	18,080	20,946	19,356
Investment securities, tax-exempt	895	1,351	1,857
Other	1,284	2,232	1,648
Total interest income	263,031	282,877	257,316
Interest expense:
Deposits	30,459	50,495	34,631
Short-term borrowings	517	1,934	2,838
Subordinated notes	3,367	3,677	3,625
Long-term debt and mandatorily redeemable securities	2,868	2,905	2,316
Total interest expense	37,211	59,011	43,410
Net interest income	225,820	223,866	213,906
Provision for credit losses	36,001	15,833	19,462
Net interest income after provision for credit losses	189,819	208,033	194,444
Noninterest income:
Mortgage banking	15,674	4,698	3,844
Insurance commissions	7,025	6,761	6,502
Income related to lease payments	23,380	30,741	31,793
Gains (losses) on investment securities available-for-sale	279	0	(345)
Other	11,949	13,019	10,362
Total noninterest income	103,889	101,130	97,050
Noninterest expense:
Salaries and employee benefits	101,556	97,098	93,857
Net occupancy	10,276	10,528	10,041
Furniture and equipment	25,688	24,815	23,433
Professional fees	6,317	6,952	7,680
Supplies and communication	5,563	6,454	6,320
FDIC and other insurance	2,606	1,795	2,923
Business development and marketing	4,157	6,303	6,112
Loan and lease collection and repossession	3,099	3,402	3,375
Other	7,902	6,534	6,478
Total noninterest expense	187,367	189,009	186,467
Income before income taxes	106,341	120,154	105,027
Income tax expense	24,880	28,139	22,613
Net income	81,461	92,015	82,414
Net (income) loss attributable to noncontrolling interests	(24)	(55)	0
Net income available to common shareholders	$ 81,437	$ 91,960	$ 82,414
Basic net income per common share, in dollars per share	$ 3.17	$ 3.57	$ 3.16
Diluted net income per common share, in dollars per share	$ 3.17	$ 3.57	$ 3.16
Trust and wealth advisory
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	$ 21,114	$ 20,692	$ 21,071
Service charges on deposit accounts
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	9,485	11,010	10,454
Debit card
Noninterest income:
Trust and wealth advisory, service charges on deposit accounts, and debit card income	14,983	14,209	13,369
Leased equipment
Noninterest expense:
Depreciation	$ 20,203	$ 25,128	$ 26,248

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 81,461	$ 92,015	$ 82,414
Other comprehensive income (loss):
Unrealized appreciation (depreciation) of investment securities available-for-sale	17,666	20,875	(9,073)
Reclassification adjustment for realized (gains) losses included in net income	(279)	0	345
Income tax effect	(4,188)	(5,027)	2,102
Other comprehensive income (loss), net of tax	13,199	15,848	(6,626)
Comprehensive income	94,660	107,863	75,788
Comprehensive (income) loss attributable to noncontrolling interests	(24)	(55)	0
Comprehensive income available to common shareholders	$ 94,636	$ 107,808	$ 75,788

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock	Common StockCumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment [Member]	Retained EarningsCumulative Effect, Period of Adoption, Adjusted Balance [Member]	Cost of Common Stock in Treasury	Cost of Common Stock in TreasuryCumulative Effect, Period of Adoption, Adjusted Balance [Member]	Accumulated Other Comprehensive Income (Loss), Net	Accumulated Other Comprehensive Income (Loss), NetCumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss), NetCumulative Effect, Period of Adoption, Adjusted Balance [Member]	Total Shareholders' Equity	Total Shareholders' EquityCumulative Effect, Period of Adoption, Adjustment [Member]	Total Shareholders' EquityCumulative Effect, Period of Adoption, Adjusted Balance [Member]	Noncontrolling Interests	Noncontrolling InterestsCumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at Dec. 31, 2017	$ 718,537	$ 0	$ 718,537	$ 436,538	$ 436,538	$ 339,959	$ 718	$ 340,677	$ (54,628)	$ (54,628)	$ (3,332)	$ (718)	$ (4,050)	$ 718,537	$ 0	$ 718,537	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity
Net income	82,414					82,414								82,414
Other comprehensive income (loss)	(6,626)										(6,626)			(6,626)
Issuance of 46,089, 51,533, and 47,977 common shares under stock based compensation awards for 2020, 2019 and 2018, respectively	1,980					841			1,139					1,980
Cost of 166,446, 325,787, and 201,013 shares of common stock acquired for treasury for 2020, 2019 and 2018, respectively	(9,271)								(9,271)					(9,271)
Common stock dividend ($1.13, $1.10, and $0.96 per share for 2020, 2019 and 2018, respectively)	(24,952)					(24,952)								(24,952)
Contributions from noncontrolling interests	1,508													0			1,508
Balance at Dec. 31, 2018	$ 763,590	(301)	763,289	436,538	436,538	398,980	(301)	398,679	(62,760)	(62,760)	(10,676)		(10,676)	762,082	(301)	761,781	1,508	1,508
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	47,977
Common stock acquired for treasury, shares	201,013
Common stock dividend (in dollars per share)	$ 0.96
Net income	$ 92,015					91,960								91,960			55
Other comprehensive income (loss)	15,848										15,848			15,848
Issuance of 46,089, 51,533, and 47,977 common shares under stock based compensation awards for 2020, 2019 and 2018, respectively	2,005					862			1,143					2,005
Cost of 166,446, 325,787, and 201,013 shares of common stock acquired for treasury for 2020, 2019 and 2018, respectively	(15,085)								(15,085)					(15,085)
Common stock dividend ($1.13, $1.10, and $0.96 per share for 2020, 2019 and 2018, respectively)	(28,232)					(28,232)								(28,232)
Contributions from noncontrolling interests	18,934													0			18,934
Distributions to noncontrolling interests	(138)													0			(138)
Balance at Dec. 31, 2019	$ 848,636	$ (2,552)	$ 846,084	436,538	$ 436,538	463,269	$ (2,552)	$ 460,717	(76,702)	$ (76,702)	5,172		$ 5,172	828,277	$ (2,552)	$ 825,725	20,359	$ 20,359
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	51,533
Common stock acquired for treasury, shares	325,787
Common stock dividend (in dollars per share)	$ 1.10
Net income	$ 81,461					81,437								81,437			24
Other comprehensive income (loss)	13,199										13,199			13,199
Issuance of 46,089, 51,533, and 47,977 common shares under stock based compensation awards for 2020, 2019 and 2018, respectively	1,839					962			877					1,839
Cost of 166,446, 325,787, and 201,013 shares of common stock acquired for treasury for 2020, 2019 and 2018, respectively	(6,415)								(6,415)					(6,415)
Common stock dividend ($1.13, $1.10, and $0.96 per share for 2020, 2019 and 2018, respectively)	(28,940)					(28,940)								(28,940)
Contributions from noncontrolling interests	24,098													0			24,098
Distributions to noncontrolling interests	(656)													0			(656)
Balance at Dec. 31, 2020	$ 930,670			$ 436,538		$ 514,176			$ (82,240)		$ 18,371			$ 886,845			$ 43,825
Increase (Decrease) in Stockholders' Equity
Issuance of common shares per stock based compensation awards, shares	46,089
Common stock acquired for treasury, shares	166,446
Common stock dividend (in dollars per share)	$ 1.13

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 81,461	$ 92,015	$ 82,414
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	36,001	15,833	19,462
Depreciation of premises and equipment	5,673	5,786	5,620
Stock-based compensation	3,293	2,765	3,553
Amortization of investment securities premiums and accretion of discounts, net	6,057	4,014	3,477
Amortization of mortgage servicing rights	2,361	1,312	956
Mortgage servicing rights impairments	812	0	0
Amortization of right of use assets	2,842	3,046	0
Deferred income taxes	(24,160)	(5,730)	(550)
(Gains) losses on investment securities available-for-sale	(279)	0	345
Originations of loans held for sale, net of principal collected	(330,990)	(145,097)	(78,450)
Proceeds from the sales of loans held for sale	351,337	139,050	82,127
Net gains on sale of loans held for sale	(12,955)	(2,940)	(1,844)
Net gains on sale of other real estate and repossessions	(138)	(487)	(561)
Net gain on sale of premises and equipment	0	(1,251)	(128)
Change in interest receivable	(1,117)	(245)	(1,747)
Change in interest payable	(9,923)	4,968	2,997
Change in other assets	12,782	11,213	(7,048)
Change in other liabilities	10,293	13,492	21,884
Other	940	1,734	940
Net change in operating activities	154,493	164,606	159,695
Investing activities:
Proceeds from sales of investment securities available-for-sale	8,403	0	11,392
Proceeds from maturities and paydowns of investment securities available-for-sale	443,617	317,295	145,167
Purchases of investment securities available-for-sale	(597,296)	(351,189)	(255,205)
Net change in partnership investments	(54,981)	(33,840)	(13,669)
Net change in other investments	985	(10)	(2,451)
Loans sold or participated to others	17,462	53,369	22,835
Proceeds from principal payments on direct finance leases	54,771	69,188	50,457
Net change in loans and leases	(489,477)	(392,475)	(405,961)
Net change in equipment owned under operating leases	26,414	(2,495)	(21,107)
Purchases of premises and equipment	(2,850)	(8,033)	(3,058)
Proceeds from disposal of premises and equipment	23	3,418	216
Proceeds from sales of other real estate and repossessions	10,271	10,855	13,433
Net change in investing activities	(582,658)	(333,917)	(457,951)
Financing activities:
Net change in demand deposits and savings accounts	1,069,843	54,272	171,799
Net change in time deposits	(481,141)	180,732	197,793
Net change in short-term borrowings	4,748	(53,451)	(15,251)
Proceeds from issuance of long-term debt	10,000	0	0
Payments on long-term debt	(2,905)	(2,695)	(1,735)
Stock issued under stock purchase plans	39	49	145
Acquisition of treasury stock	(6,415)	(15,085)	(9,271)
Net change in noncontrolling interests	23,442	18,796	1,508
Cash dividends paid on common stock	(29,764)	(29,021)	(25,686)
Net change in financing activities	587,847	153,597	319,302
Net change in cash and cash equivalents	159,682	(15,714)	21,046
Cash and cash equivalents, beginning of year	83,365	99,079	78,033
Cash and cash equivalents, end of year	243,047	83,365	99,079
Leased equipment
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	$ 20,203	$ 25,128	$ 26,248

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOW (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non-cash transactions:
Loans transferred to other real estate and repossessions	$ 4,317	$ 14,807	$ 11,007
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	622	300	583
Right of use assets obtained in exchange for lease obligation	2,612	17,064	0
Cash paid for:
Interest	47,134	54,043	40,413
Income taxes	$ 13,461	$ 5,585	$ 8,272

Accounting Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2020
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 in Indiana, Michigan and Florida. 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 22, 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, 2020 and 2019, 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, 2020 and 2019, 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. 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. Effective Janaury 1, 2019, as part of the new leasing standard, only those costs incurred as a direct result of closing a lease transaction are capitalized. All existing deferrals will continue to be amortized over the estimated life of the lease while all new incremental direct costs are expensed immediately. Accrued interest is included in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition and is excluded from the calculation of the allowance for credit losses. 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. Loans and leases that have been modified and economic concessions have been granted to borrowers who have experienced financial difficulties are considered a troubled debt restructuring (TDR). These concessions typically result from the Company’s loss mitigation activities and may include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Certain TDRs are classified as nonperforming at the time of restructuring and typically are returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period of at least six months. When the Company modifies loans and leases in a TDR, it evaluates any possible impairment based on the present value of expected future cash flows, discounted at the contractual interest rate of the original loan or lease agreement, or uses the current fair value of the collateral, less selling costs for collateral dependent loans. 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. In periods subsequent to modification, the Company evaluates all TDRs, including those that have payment defaults, for possible impairment and recognizes impairment through the allowance for loan and lease losses. On March 27, 2020, the President of the United States signed the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which provides entities with optional temporary relief from certain accounting and financial reporting requirements under U.S. GAAP. Section 4013 of the CARES Act allows financial institutions to suspend application of certain TDR accounting guidance for loan and lease modifications related to the COVID-19 pandemic made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the end of the COVID-19 national emergency, provided certain criteria are met. Section 4013 of the CARES Act was amended on December 27, 2020 to extend this relief until January 1, 2022. The relief can be applied to loan and lease modifications for borrowers that were not more than 30 days past due as of December 31, 2019 and to loan and lease modifications that defer or delay the payment of principal or interest, or change the interest rate on the loan. The Company chose to apply this relief to eligible loan and lease modifications. At December 31, 2020, loan and lease modification balances related to the COVID-19 pandemic were $129 million. 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, 2020 and 2019, residential real estate portfolio loans included $2.31 million and $1.44 million, respectively, of loans available for repurchase under the GNMA optional repurchase programs with the offsetting liability recorded within other short-term borrowings. 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. Gains and losses on the sale of MSRs are recognized in Noninterest Income on the 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. 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 — Effective January 1, 2020, the allowance for credit losses is established for current expected credit losses on the Company’s loan and lease portfolio. Prior to January 1, 2020, the allowance was established based on an incurred loss model. 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 eight 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 is 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 impairment. 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 troubled debt restructurings (TDRs). 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, impairment 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 cancellable by the Company. The liability for credit losses on unfunded loan commitments is adjusted as a provision for credit losses in Other Noninterest Expense 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 estimates future rent increases and records the actual difference to variable costs. 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, 2020 and 2019, other real estate had carrying values of $0.36 million and $0.52 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 $1.98 million and $8.62 million, as of December 31, 2020 and 2019, 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 has historically evaluated goodwill for impairment during the fourth quarter of each year, with financial data as of September 30. During the first quarter of 2020, management determined that the deterioration in general economic conditions as a result of the COVID-19 pandemic and responses thereto represented a triggering event prompting an evaluation of goodwill impairment. Based on the analyses performed each quarter of 2020, the Company determined that goodwill was not impaired. Partnership Investments — The partnerships in which the Company has investments account for their investments at fair value. As a result, the Company’s investments in these partnerships reflect the underlying fair value of the partnerships’ investments. The Company accounts for its investments in partnerships for which it owns three percent or

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Nonrefundable Fees and Other Costs: In October 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2020-08 “Codification Improvements to Subtopic 310-20, Receivables–Nonrefundable Fees and Other Costs.” This ASU clarifies that an entity should reevaluate whether a callable debt security is within the scope of ASC paragraph 310-20-35-33 for each reporting period. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early application is not permitted. All entities should apply ASU 2020-08 on a prospective basis as of the beginning of the period of adoption for existing or newly purchased callable debt securities. The Company adopted ASU 2020-08 as of January 1, 2021 and it did not have a material impact on its accounting and disclosures. Reference Rate Reform: In March 2020, the FASB issued ASU No. 2020-04 “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” These amendments provide temporary optional guidance to ease the potential burden in accounting for reference rate reform. The ASU provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. It is intended to help stakeholders during the global market-wide reference rate transition period. In January 2021, the FASB issued ASU 2021-01 which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022. The Company is implementing a transition plan to identify and modify its loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR. The Company is continuing to assess ASU 2020-04 and its impact on the Company’s transition away from LIBOR for its loan and other financial instruments. Partnership Investments and Derivatives: In January 2020, the FASB issued ASU No. 2020-01 “Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815.” These amendments, among other things, clarify that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting under Topic 323, Investments-Equity Method and Joint Ventures, for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that, when determining the accounting for certain forward contracts and purchased options a company should not consider, whether upon settlement or exercise, if the underlying securities would be accounted for under the equity method or fair value option. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early application is permitted, including early adoption in an interim period. An entity should apply ASU 2020-01 prospectively at the beginning of the interim period that includes the adoption date. The Company adopted ASU 2020-01 on January 1, 2021 and it did not have a material impact on its accounting and disclosures. Income Taxes: In December 2019, the FASB issued ASU 2019-12 “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” These amendments remove specific exceptions to the general principles in Topic 740 in GAAP. It eliminates the need for an organization to analyze whether the following apply in a given period: exception to the incremental approach for intraperiod tax allocation; exceptions to accounting for basis differences where there are ownership changes in foreign investments; and exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. It also improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP for: franchise taxes that are partially based on income; transactions with a government that result in a step up in the tax basis of goodwill; separate financial statements of legal entities that are not subject to tax; and enacts changes in tax laws in interim periods. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. The Company adopted ASU 2019-12 on January 1, 2021 and it did not have a material impact on its accounting and disclosures. Measurement of Credit Losses on Financial Instruments: In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments (CECL).” The provisions of ASU 2016-13 were issued to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to-maturity debt securities, trade and other receivables, net investment in leases and other commitments to extend credit held by a reporting entity at each reporting date. ASU 2016-13 requires that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The amendments in ASU 2016-13 eliminate the probable incurred loss recognition in current GAAP and reflect an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the financial assets. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security. The FASB issued additional ASUs containing clarifying guidance, transition relief provisions and minor updates to the original ASU. These include ASU 2018-19 (issued November 2018), ASU 2019-04 (issued April 2019), ASU 2019-05 (issued May 2019), ASU 2019-10 (issued November 2019), ASU 2019-11 (issued November 2019), ASU 2020-02 (issued February 2020) and ASU 2020-03 (issued March 2020). ASU 2016-13 and subsequent ASUs are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. This amendment is required to be adopted using a modified retrospective approach with a cumulative-effect adjustment to beginning retained earnings, as of the beginning of the first reporting period in which the guidance is effective. As previously disclosed, the Company formed a cross-functional team to work through its implementation plan. The Company’s cross-functional team completed the assessment and documentation of processes, internal controls, data and model validation testing, parallel testing, qualitative factors and forecast periods as well as model development. The Company implemented a third-party software solution to assist in the application of the new standard including portfolio segmentation according to shared risk characteristics and modeling methodologies. The Company had finalized the formal review and approval process and the results of its CECL estimate as of year-end 2019 but elected to delay its adoption of ASU 2016-13, as approved by the Coronavirus Aid, Relief, and Economic Security (CARES) Act, until December 31, 2020. Upon adoption of ASU 2016-13, the Company recognized a one-time cumulative effect adjustment decreasing retained earnings as of January 1, 2020 by $2.55 million, net of deferred taxes of $0.81 million. Upon adopting ASU 2016-13, the Company did not record an allowance as of January 1, 2020 with respect to its available-for-sale debt securities as the majority of these securities are government agency-backed securities for which the risk of loss is minimal. The adoption of ASU 2016-13 did not have a significant impact on the Company’s regulatory capital ratios. The accounting policies stated in Note 1 relating to the allowance for credit losses on available-for-sale investment securities, loans and leases and unfunded loan commitments reflect the current accounting policies required by ASU 2016-13. Disclosures relating to prior year accounting policies can be found in the 2019 Annual Report on Form 10 - K . The main drivers of the adjustment to retained earnings are summarized in the following table. (Dollar in thousands) Pre-ASC 326 Adoption Impact of ASC 326 As Reported Under Allowance for credit losses Commercial and agricultural $ 23,671 $ (655) $ 23,016 Auto and light truck 14,400 (1,303) 13,097 Medium and heavy duty truck 4,612 2,414 7,026 Aircraft 31,058 484 31,542 Construction equipment 14,120 372 14,492 Commercial real estate 18,350 (649) 17,701 Residential real estate and home equity 3,609 1,688 5,297 Consumer 1,434 233 1,667 Total allowance for credit losses on loans and leases 111,254 2,584 113,838 Accrued expenses and other liabilities (unfunded loan commitments) 3,172 777 3,949 Total allowance for credit losses $ 114,426 $ 3,361 $ 117,787

Investment Securities Available

Investment Securities Available-For-Sale	12 Months Ended
	Dec. 31, 2020
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, 2020 U.S. Treasury and Federal agencies securities $ 610,195 $ 9,521 $ (234) $ 619,482 U.S. States and political subdivisions securities 78,812 2,346 (31) 81,127 Mortgage-backed securities - Federal agencies 442,748 11,237 (196) 453,789 Corporate debt securities 40,813 1,556 — 42,369 Foreign government securities 700 — — 700 Total investment securities available-for-sale $ 1,173,268 $ 24,660 $ (461) $ 1,197,467 December 31, 2019 U.S. Treasury and Federal agencies securities $ 524,896 $ 2,538 $ (470) $ 526,964 U.S. States and political subdivisions securities 83,566 1,048 (109) 84,505 Mortgage-backed securities - Federal agencies 372,458 3,948 (1,017) 375,389 Corporate debt securities 52,151 890 (16) 53,025 Foreign government securities 700 — — 700 Total investment securities available-for-sale $ 1,033,771 $ 8,424 $ (1,612) $ 1,040,583 Amortized cost excludes accrued interest receivable which is included in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition. At December 31, 2020 and 2019, accrued interest receivable on investment securities available for sale was $3.84 million and $4.24 million, respectively. At December 31, 2020, 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, 2020 and 2019. The following table shows the contractual maturities of investments in debt securities available-for-sale at December 31, 2020. 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 $ 115,555 $ 116,556 Due after one year through five years 525,017 537,183 Due after five years through ten years 89,368 89,359 Due after ten years 580 580 Mortgage-backed securities 442,748 453,789 Total debt securities available-for-sale $ 1,173,268 $ 1,197,467 The following table summarizes gross unrealized losses and fair value by investment category and age. At December 31, 2020, the Company’s available-for-sale securities portfolio consisted of 623 securities, 54 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, 2020 U.S. Treasury and Federal agencies securities $ 136,534 $ (234) $ — $ — $ 136,534 $ (234) U.S. States and political subdivisions securities 6,391 (30) 199 (1) 6,590 (31) Mortgage-backed securities - Federal agencies 67,736 (187) 3,274 (9) 71,010 (196) Corporate debt securities — — — — — — Foreign government securities 200 — — — 200 — Total debt securities available-for-sale $ 210,861 $ (451) $ 3,473 $ (10) $ 214,334 $ (461) December 31, 2019 U.S. Treasury and Federal agencies securities $ 87,352 $ (171) $ 69,053 $ (299) $ 156,405 $ (470) U.S. States and political subdivisions securities 9,283 (107) 1,042 (2) 10,325 (109) Mortgage-backed securities - Federal agencies 81,951 (383) 51,165 (634) 133,116 (1,017) Corporate debt securities — — 8,091 (16) 8,091 (16) Foreign government securities — — — — — — Total debt securities available-for-sale $ 178,586 $ (661) $ 129,351 $ (951) $ 307,937 $ (1,612) The Company does not consider available-for-sale securities with unrealized losses at December 31, 2020 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 securities available-for-sale portfolio, including marketable equity securities. (Dollars in thousands) 2020 2019 2018 Gross realized gains $ 285 $ — $ 2 Gross realized losses (6) — (347) Net realized gains (losses) $ 279 $ — $ (345) At December 31, 2020 and 2019, investment securities with carrying values of $338.68 million and $281.38 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, 2020
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, 2020 and 2019, and totaled $5.49 billion and $5.09 billion, respectively. At December 31, 2020 and 2019, net deferred loan and lease (fees) costs were $(3.73) million and $5.06 million, respectively. At December 31, 2020, there were $6.37 million in deferred loan fees related to Paycheck Protection Program (PPP) loans. Accrued interest receivable on loans and leases at December 31, 2020 and 2019 was $16.39 million and $14.81 million, respectively. 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 $26.51 million and $17.08 million at December 31, 2020 and 2019, respectively. During 2020, $11.91 million of new loans and other additions were made and $2.48 million of repayments and other reductions occurred. The Company evaluates loans and leases 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 our safety and soundness. Loans or leases graded 7 or weaker are considered “special attention” credits and, as such, relationships in excess of $100,000 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 our 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 Auto and light truck – loans are secured by vehicles and borrowers are nationwide. The portfolio consists of multiple industries: auto rental, auto leasing and specialty vehicle which includes bus, funeral car and step van. 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 amortizations 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 recent years has been in the non-owner-occupied segment which now accounts for slightly less than half of the portfolio. The non-owner-occupied segment includes hotels, apartment complexes and warehousing facilities. There is limited exposure to construction loans. Many commercial real estate loans carry personal guarantees. Additional risks in the commercial real estate portfolio stem from 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, 2020. Term Loans and Leases by Origination Year (Dollars in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 666,905 $ 193,555 $ 134,411 $ 92,916 $ 26,034 $ 19,790 $ 291,990 $ — $ 1,425,601 Grades 7-12 6,788 1,699 4,726 3,507 1,200 2,134 33,067 — 53,121 Total commercial and agricultural 673,693 195,254 139,137 96,423 27,234 21,924 325,057 — 1,478,722 Auto and light truck Grades 1-6 248,932 141,841 52,749 24,101 4,210 608 — — 472,441 Grades 7-12 19,113 27,136 12,796 8,612 2,250 21 — — 69,928 Total auto and light truck 268,045 168,977 65,545 32,713 6,460 629 — — 542,369 Medium and heavy duty truck Grades 1-6 92,698 88,314 44,205 31,773 15,644 4,840 — — 277,474 Grades 7-12 — 978 — — 632 88 — — 1,698 Total medium and heavy duty truck 92,698 89,292 44,205 31,773 16,276 4,928 — — 279,172 Aircraft Grades 1-6 429,283 153,358 93,042 95,457 43,972 20,966 6,370 — 842,448 Grades 7-12 11,519 2,561 479 596 2,187 1,670 — — 19,012 Total aircraft 440,802 155,919 93,521 96,053 46,159 22,636 6,370 — 861,460 Construction equipment Grades 1-6 311,174 180,550 96,320 42,713 12,624 5,722 17,502 737 667,342 Grades 7-12 17,518 13,743 10,642 398 237 85 2,988 1,935 47,546 Total construction equipment 328,692 194,293 106,962 43,111 12,861 5,807 20,490 2,672 714,888 Commercial real estate Grades 1-6 190,725 204,477 173,847 175,009 69,022 122,762 373 — 936,215 Grades 7-12 9,518 7,990 5,173 6,684 1,762 2,522 — — 33,649 Total commercial real estate 200,243 212,467 179,020 181,693 70,784 125,284 373 — 969,864 Residential real estate and home equity Performing 133,829 65,690 18,194 22,929 41,847 86,106 135,255 5,703 509,553 Nonperforming — — 21 14 — 1,435 247 109 1,826 Total residential real estate and home equity 133,829 65,690 18,215 22,943 41,847 87,541 135,502 5,812 511,379 Consumer Performing 43,824 34,409 18,904 7,005 2,259 793 23,869 — 131,063 Nonperforming 2 99 78 36 8 2 159 — 384 Total consumer $ 43,826 $ 34,508 $ 18,982 $ 7,041 $ 2,267 $ 795 $ 24,028 $ — $ 131,447 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, 2020 Commercial and agricultural $ 1,472,755 $ 34 $ — $ — $ 1,472,789 $ 5,933 $ 1,478,722 Auto and light truck 504,659 560 205 — 505,424 36,945 542,369 Medium and heavy duty truck 278,452 — — — 278,452 720 279,172 Aircraft 860,632 — — — 860,632 828 861,460 Construction equipment 701,124 1,093 298 — 702,515 12,373 714,888 Commercial real estate 968,370 — — — 968,370 1,494 969,864 Residential real estate and home equity 508,532 782 239 108 509,661 1,718 511,379 Consumer 130,458 504 101 7 131,070 377 131,447 Total $ 5,424,982 $ 2,973 $ 843 $ 115 $ 5,428,913 $ 60,388 $ 5,489,301 December 31, 2019 Commercial and agricultural $ 1,131,704 $ 118 $ — $ — $ 1,131,822 $ 969 $ 1,132,791 Auto and light truck 586,212 1,268 77 — 587,557 1,250 588,807 Medium and heavy duty truck 293,736 14 — — 293,750 1,074 294,824 Aircraft 772,846 7,026 3,293 — 783,165 875 784,040 Construction equipment 702,671 819 609 — 704,099 1,352 705,451 Commercial real estate 906,468 58 — — 906,526 1,651 908,177 Residential real estate and home equity 528,844 561 152 257 529,814 2,189 532,003 Consumer 138,132 632 187 54 139,005 429 139,434 Total $ 5,060,613 $ 10,496 $ 4,318 $ 311 $ 5,075,738 $ 9,789 $ 5,085,527 Interest income for the years ended December 31, 2020, 2019, and 2018, would have increased by approximately $3.49 million, $0.69 million, and $2.18 million, respectively, if the nonaccrual loans and leases had earned interest at their full contract rate. The following table shows impaired loans and leases, segregated by portfolio segment, and the corresponding allowance for impaired loans and leases. (Dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance December 31, 2019 With no related allowance recorded: Commercial and agricultural $ 218 $ 218 $ — Auto and light truck 853 853 — Medium and heavy duty truck 1,074 1,074 — Aircraft 875 875 — Construction equipment 615 615 — Commercial real estate 1,487 1,487 — Residential real estate and home equity — — — Consumer — — — Total with no related allowance recorded 5,122 5,122 — With an allowance recorded: Commercial and agricultural 10,366 10,366 3,003 Auto and light truck 278 278 30 Medium and heavy duty truck — — — Aircraft — — — Construction equipment 736 736 75 Commercial real estate — — — Residential real estate and home equity 337 339 117 Consumer — — — Total with an allowance recorded 11,717 11,719 3,225 Total impaired loans $ 16,839 $ 16,841 $ 3,225 The following table shows average recorded investment and interest income recognized on impaired loans and leases, segregated by portfolio segment, for the years ending December 31, 2019 and 2018. 2019 2018 (Dollars in thousands) Average Interest Average Interest Commercial and agricultural $ 5,983 $ 242 $ 2,812 $ — Auto and light truck 2,721 — 9,352 — Medium and heavy duty truck 244 — 247 — Aircraft 2,409 8 9,987 20 Construction equipment 1,664 — 1,663 — Commercial real estate 1,715 — 2,303 — Residential real estate and home equity 340 19 347 15 Consumer loans — — — — Total $ 15,076 $ 269 $ 26,711 $ 35 The following table shows the number of loans and leases classified as troubled debt restructuring (TDR) during 2020, 2019 and 2018, by portfolio segment, as well as the recorded investment as of December 31. The classification between nonperforming and performing is shown at the time of modification. Modification programs focused on extending maturity dates or modifying payment patterns with most TDRs experiencing a combination of concessions. The modifications did not result in the contractual forgiveness of principal or interest. The TDRs during 2020 were the result of issues that predated the COVID-19 pandemic. There were two modifications during 2020, one modification during 2019, and no modifications during 2018 that resulted in an interest rate reduction below market rate. Consequently, the financial impact of the modifications was immaterial. 2020 2019 2018 (Dollars in thousands) Number of Modifications Recorded Investment Number of Modifications Recorded Investment Number of Modifications Recorded Investment Performing TDRs: Commercial and agricultural — $ — 1 $ 9,901 — $ — Auto and light truck — — — — — — Medium and heavy duty truck — — — — — — Aircraft — — — — — — Construction equipment — — — — — — Commercial real estate — — — — — — Residential real estate and home equity — — — — — — Consumer — — — — — — Total performing TDR modifications — — 1 9,901 — — Nonperforming TDRs: Commercial and agricultural — — 1 465 — — Auto and light truck — — — — 1 285 Medium and heavy duty truck — — — — — — Aircraft 1 828 — — — — Construction equipment 1 9,905 — — — — Commercial real estate — — — — — — Residential real estate and home equity — — — — — — Consumer — — — — — — Total nonperforming TDR modifications 2 10,733 1 465 1 285 Total TDR modifications 2 $ 10,733 2 $ 10,366 1 $ 285 There was one nonperforming commercial and agricultural TDR with a recorded investment of $0.41 million which had a payment default within the twelve months following modification for the year ended December 31, 2020, one nonperforming auto and light truck TDR with a recorded investment of $0.00 million which had a payment default within the twelve months following modification for the year ended December 31, 2019, and no TDRs which had a payment default within the twelve months following modification during the year ended December 31, 2018. The classification between nonperforming and performing is shown at the time of modification. Default occurs when a loan or lease is 90 days or more past due under the modified terms or transferred to nonaccrual. The following table shows the recorded investment of loans and leases classified as troubled debt restructurings as of December 31. Year Ended December 31 (Dollars in thousands) 2020 2019 Performing TDRs $ 330 $ 10,238 Nonperforming TDRs 11,156 486 Total TDRs $ 11,486 $ 10,724

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2020
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, 2020, 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 Auto and light truck Medium and heavy duty truck Aircraft Construction equipment Commercial real estate Residential real estate and home equity Consumer Total 2020 Balance, beginning of year $ 23,671 $ 14,400 $ 4,612 $ 31,058 $ 14,120 $ 18,350 $ 3,609 $ 1,434 $ 111,254 Impact of ASC 326 adoption (655) (1,303) 2,414 484 372 (649) 1,688 233 2,584 Adjusted balance, beginning of year 23,016 13,097 7,026 31,542 14,492 17,701 5,297 1,667 113,838 Charge-offs 903 7,107 15 855 4,090 37 74 893 13,974 Recoveries 663 499 18 1,800 1,415 58 33 303 4,789 Net charge-offs 240 6,608 (3) (945) 2,675 (21) 41 590 9,185 Provision (recovery of provision) (547) 22,437 (629) 1,566 7,349 5,036 118 671 36,001 Balance, end of year $ 22,229 $ 28,926 $ 6,400 $ 34,053 $ 19,166 $ 22,758 $ 5,374 $ 1,748 $ 140,654 2019 Balance, beginning of year $ 17,063 $ 14,689 $ 4,303 $ 33,047 $ 10,922 $ 15,705 $ 3,425 $ 1,315 $ 100,469 Charge-offs 1,040 991 1,132 3,066 238 5 53 1,066 7,591 Recoveries 664 97 32 1,143 160 75 85 287 2,543 Net charge-offs (recoveries) 376 894 1,100 1,923 78 (70) (32) 779 5,048 Provision (recovery of provision) 6,984 605 1,409 (66) 3,276 2,575 152 898 15,833 Balance, end of year $ 23,671 $ 14,400 $ 4,612 $ 31,058 $ 14,120 $ 18,350 $ 3,609 $ 1,434 $ 111,254 2018 Balance, beginning of year $ 16,228 $ 10,103 $ 4,844 $ 34,619 $ 9,343 $ 14,792 $ 3,666 $ 1,288 $ 94,883 Charge-offs 229 3,308 23 12,222 288 70 63 909 17,112 Recoveries 222 68 — 2,499 100 53 23 271 3,236 Net charge-offs (recoveries) 7 3,240 23 9,723 188 17 40 638 13,876 Provision (recovery of provision) 842 7,826 (518) 8,151 1,767 930 (201) 665 19,462 Balance, end of year $ 17,063 $ 14,689 $ 4,303 $ 33,047 $ 10,922 $ 15,705 $ 3,425 $ 1,315 $ 100,469 The allowance for loan and lease losses increased year-over-year in 2020 for most portfolio segments due to downward migration in credit quality and increased risk as a result of the pandemic. The impact of adopting ASC 326 is also noted for each loan segment. Generally, a decrease in the allowance upon adoption was related to shorter duration assets in the loan class and likewise, an increase was generally due to longer duration assets. Commercial and agricultural – loan growth was due primarily to PPP loans which have minimal credit risk. The decline in the allowance was principally due to the impact of the short duration lines of credit driving lower reserves and minimal reserves for PPP loans. Auto and light truck – allowance increased as a result of the significant impact the pandemic had on the portfolio, which includes the particularly hard-hit bus industry. The increase related to credit deterioration was somewhat offset by a lower allowance for the auto rental industry due to the short average duration of the loans. Loan balances declined somewhat year-over-year. Medium and heavy duty truck – allowance decrease was principally attributable to credit quality metrics continuing to be relatively strong therefore a recovery of provision was recognized during the period. Aircraft – the allowance was principally impacted by loan growth. The Company has historically carried a higher allowance in this portfolio due to volatility. The higher allowance during the period was due to charge-offs impacting the loss history and the long duration assets. Construction equipment – allowance increase was mainly driven by exposure to mining and frac sand industries. While the total Company exposure is limited, the impact of lower oil prices on this portfolio was relevant. Commercial real estate – allowance increase was a result of loan growth and exposure to industries hardest hit by the pandemic, i.e. hotels and accommodations and, to a lesser extent, retail and office buildings. The Company’s exposure to these industries is limited, but the impact was noticeable in this asset class. Residential real estate and home equity – increased allowance as a result of longer asset duration. Consumer – segment saw an increase in allowance due to portfolio mix and duration. Economic Outlook As of December 31, 2020, the COVID-19 pandemic created extraordinary circumstances affecting the loan and lease portfolios. The forecast considers global and domestic economic effects from the ongoing pandemic as well as the potential impact of U.S. monetary and fiscal policy, including the recently passed Coronavirus Response and Relief Supplemental Appropriations Act, which may impact clients; particularly those who will benefit from a second round of paycheck protection program funds or targeted funds for struggling industry sectors such as transportation. The Company’s assumption was that the economic slowdown will have an adverse impact on the loan and lease portfolio over the next two years. GDP is expected to grow throughout 2021 but is not expected to return to pre-pandemic levels until 2022. Likewise, unemployment is not likely to get back to pre-shutdown levels until 2022. As a result of the unprecedented economic uncertainty caused by the COVID-19 pandemic, the Company’s future loss estimates may vary considerably from the December 31, 2020 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) 2020 2019 2018 Balance, beginning of year $ 3,172 $ 3,075 $ 3,050 Impact of ASC 326 adoption 777 — — Adjusted balance, beginning of year 3,949 3,075 3,050 Provision (recovery of provision) 550 97 25 Balance, end of year $ 4,499 $ 3,172 $ 3,075

Lease Investments

Lease Investments	12 Months Ended
	Dec. 31, 2020
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, 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) 2020 2019 Direct finance leases: Minimum lease payments $ 160,508 $ 190,879 Estimated unguaranteed residual values — 41 Less: Unearned income (21,507) (30,568) Net investment in direct finance leases $ 139,001 $ 160,352 Operating leases: Gross investment in operating leases $ 116,818 $ 176,485 Accumulated depreciation (51,778) (64,801) Net investment in operating leases $ 65,040 $ 111,684 The following table shows future minimum lease payments due from clients on direct finance and operating leases at December 31, 2020. (Dollars in thousands) Direct Operating Leases 2021 $ 34,123 $ 16,784 2022 31,867 12,995 2023 29,791 7,676 2024 18,042 3,859 2025 14,822 1,636 Thereafter 31,863 242 Total $ 160,508 $ 43,192 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 our 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 $43.65 million and $69.09 million at December 31, 2020 and December 31, 2019, 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) 2020 2019 2018 Direct finance leases: Interest income on lease receivable $ 8,258 $ 10,985 $ 13,052 Operating leases: Income related to lease payments $ 23,380 $ 30,741 $ 31,793 Depreciation expense 20,203 25,128 26,248 Income related to reimbursements from lessees for personal property tax on operating leased equipment for the years ended December 31, 2020 and December 31, 2019 were $0.61 million and $0.73 million. respectively. Expense related to personal property tax payments on operating leased equipment for the year ended December 31, 2020 and December 31, 2019 were $0.61 million and $0.73 million, respectively. During the year ended December 31, 2020, the Company recorded impairment charges of $0.68 million. 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, 2020
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) 2020 2019 Land $ 15,505 $ 15,222 Buildings and improvements 60,488 59,508 Furniture and equipment 42,672 41,831 Total premises and equipment 118,665 116,561 Accumulated depreciation and amortization (69,292) (64,342) Net premises and equipment $ 49,373 $ 52,219 Depreciation and amortization of properties and equipment totaled $5.67 million in 2020, $5.79 million in 2019, and $5.62 million in 2018. During 2020, 2019 and 2018, the Company recorded long-lived asset impairment charges totaling zero, zero and $100,000, respectively. The impairment charges were recorded as a result of appraisals on buildings and were recognized in Other Expense on the Consolidated Statements of Income.

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2020
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 $838.45 million at December 31, 2020, compared to $740.91 million at December 31, 2019, and $734.30 million at December 31, 2018. Amortization expense on MSRs is expected to total $1.39 million, $1.02 million, $0.72 million, $0.49 million, and $0.34 million in 2021, 2022, 2023, 2024, and 2025, 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) 2020 2019 Mortgage servicing rights: Balance at beginning of year $ 4,200 $ 4,283 Additions 2,777 1,229 Amortization (2,361) (1,312) Sales — — Carrying value before valuation allowance at end of year 4,616 4,200 Valuation allowance: Balance at beginning of year — — Impairment charges (812) — Balance at end of year $ (812) $ — Net carrying value of mortgage servicing rights at end of year $ 3,804 $ 4,200 Fair value of mortgage servicing rights at end of year $ 4,038 $ 5,986 At December 31, 2020, the fair value of MSRs exceeded the carrying value reported on the Consolidated Statements of Financial Condition by $0.23 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 $17.78 million and $16.77 million at December 31, 2020 and December 31, 2019, respectively. Mortgage loan contractual servicing fees, including late fees and ancillary income, were $3.13 million, $2.64 million, and $2.61 million for 2020, 2019, and 2018, 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, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill At December 31, 2020, intangible assets consisted of goodwill of $83.87 million and other intangible assets of $0.08 million, which was net of accumulated amortization of $0.06 million. At December 31, 2019, intangible assets consisted of goodwill of $83.87 million and other intangible assets of $0.10 million, which was net of accumulated amortization of $0.10 million. Intangible asset amortization was $0.02 million, $0.03 million, and $0.08 million for 2020, 2019, and 2018, respectively. Amortization on other intangible assets is expected to total $0.02 million, $0.02 million, $0.02 million, $0.02 million, and $0.00 million in 2021, 2022, 2023, 2024, and 2025, respectively. The following table shows a summary of other intangible assets as of December 31. (Dollars in thousands) 2020 2019 Other intangibles: Gross carrying amount $ 146 $ 204 Less: accumulated amortization (64) (100) Net carrying amount $ 82 $ 104

Deposits

Deposits	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Deposits	DepositsThe aggregate amount of certificates of deposit of $250,000 or more and other time deposits of $250,000 or more outstanding at December 31, 2020 and 2019 was $453.16 million and $749.44 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, 2020, by time remaining until maturity. (Dollars in thousands) Under 3 months $ 117,444 4 – 6 months 83,262 7 – 12 months 80,237 Over 12 months 172,214 Total $ 453,157 The following table shows scheduled maturities of time deposits, including both private and public funds, at December 31, 2020. (Dollars in thousands) 2021 $ 834,723 2022 170,270 2023 108,353 2024 41,353 2025 7,789 Thereafter 4,869 Total $ 1,167,357

Borrowed Funds and Mandatorily

Borrowed Funds and Mandatorily Redeemable Securities	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. (Dollars in thousands) 2020 2019 Federal Home Loan Bank borrowings (0.54% – 5.04%) $ 55,183 $ 45,819 Mandatorily redeemable securities 20,358 17,972 Other long-term debt 6,323 7,848 Total long-term debt and mandatorily redeemable securities $ 81,864 $ 71,639 Annual maturities of long-term debt outstanding at December 31, 2020, for the next five years and thereafter beginning in 2021, are as follows (in thousands): $3,168; $4,830; $2,049; $11,187; $145; and $60,485. At December 31, 2020, 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 18 fixed rate notes with maturities ranging from 2021 to 2030. These notes were collateralized by $68.95 million of certain real estate loans. Mandatorily redeemable securities as of December 31, 2020 and 2019, of $20.36 million and $17.97 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 2020, 2019, and 2018 was $2.14 million, $2.22 million, and $1.61 million, respectively. The following table shows the details of short-term borrowings as of December 31, 2020 and 2019. 2020 2019 (Dollars in thousands) Amount Weighted Average Rate Amount Weighted Average Rate Federal funds purchased $ — — % $ — — % Security repurchase agreements 143,564 0.08 120,459 0.23 Commercial paper 4,766 0.13 3,993 0.29 Federal Home Loan Bank advances — — 20,000 1.61 Other short-term borrowings 2,311 — 1,441 — Total short-term borrowings $ 150,641 0.08 % $ 145,893 0.42 %

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2020
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 $1.72 million, $1.55 million and $1.29 million for the years ended December 31, 2020, 2019 and 2018, respectively. The Company also recognized $31.08 million, $15.86 million and $10.45 million of investment tax credits for the years ended December 31, 2020, 2019 and 2018, 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, we are 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, 2020 and 2019. (Dollars in thousands) 2020 2019 Investment carrying amount $ 22,742 $ 19,843 Unfunded capital and other commitments 26,716 17,420 Maximum exposure to loss 52,106 37,904 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, 2020 and 2019, approximately $53.61 million and $41.24 million, respectively, of the Company’s assets and $4.93 million and $18.68 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, 2020. (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 1.70 % 9/15/2037 Total $ 58,764 (1) Fixed rate through life of debt. (2) 3-Month LIBOR +1.48% through remaining life of debt.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
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 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, 2020, 2019 and 2018. 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) 2020 2019 2018 Distributed earnings allocated to common stock $ 28,859 $ 28,188 $ 24,894 Undistributed earnings allocated to common stock 52,044 63,254 56,975 Net earnings allocated to common stock 80,903 91,442 81,869 Net earnings allocated to participating securities 534 518 545 Net income allocated to common stock and participating securities $ 81,437 $ 91,960 $ 82,414 Weighted average shares outstanding for basic earnings per common share 25,527,154 25,600,138 25,937,599 Dilutive effect of stock compensation — — — Weighted average shares outstanding for diluted earnings per common share 25,527,154 25,600,138 25,937,599 Basic earnings per common share $ 3.17 $ 3.57 $ 3.16 Diluted earnings per common share $ 3.17 $ 3.57 $ 3.16

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table presents reclassifications out of accumulated other comprehensive income related to unrealized gains and losses on available-for-sale securities for the two years ending December 31. (Dollars in thousands) 2020 2019 Affected Line Item in the Statements of Income Realized gains included in net income $ 279 $ — Gains (losses) on investment securities available-for-sale 279 — Income before income taxes Tax effect (65) — Income tax expense Net of tax $ 214 $ — Net income

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019, there were 824,466 and 852,128 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. Contribution expense for the years ended December 31, 2020, 2019, and 2018, amounted to $5.70 million, $5.48 million, and $4.87 million, respectively.

Stock Based Compensation

Stock Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock Based Compensation	Stock Based Compensation As of December 31, 2020, 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, 2020. 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 $2.67 million during 2020, $3.35 million in 2019, and $3.53 million in 2018. 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, 2018 676,444 295,926 $ 27.41 Shares authorized - 2018 EIP 70,461 — — Granted (74,981) 74,981 29.11 Stock awards vested — (106,513) 25.79 Forfeited 3,135 (10,575) 27.51 Balance, December 31, 2018 675,059 253,819 28.59 Shares authorized - 2019 EIP 62,538 — — Granted (74,336) 74,336 31.44 Stock awards vested — (100,299) 28.35 Forfeited 1,241 (8,865) 30.28 Balance, December 31, 2019 664,502 218,991 29.60 Shares authorized - 2020 EIP 60,233 — — Granted (147,576) 147,576 37.41 Stock awards vested — (74,203) 28.95 Forfeited 49 (870) 31.82 Balance, December 31, 2020 577,208 291,494 $ 33.71 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 2020, 2019 or 2018. 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 2020, 2019 or 2018. 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 $3.29 million in 2020, $2.76 million in 2019, and $3.55 million in 2018. The total income tax benefit recognized in the accompanying Consolidated Statements of Income related to stock-based compensation was $0.77 million in 2020, $0.65 million in 2019, and $0.86 million in 2018. Unrecognized stock-based compensation expense related to non-vested stock awards (EIP/SDP/RSAP) was $7.63 million at December 31, 2020. At such date, the weighted-average period over which this unrecognized expense was expected to be recognized was 3.44 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 2020, 2019, and 2018 offerings were $34.35 (1.78%), $43.81 (0.14%), and $53.84 (-0.09%), 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, 2020 and runs through June 1, 2022, with $304,635 in stock value to be purchased at $34.35 per share.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 2018 Current: Federal $ 42,411 $ 28,130 $ 20,167 State 6,629 5,739 2,996 Total current 49,040 33,869 23,163 Deferred: Federal (21,865) (5,135) (875) State (2,295) (595) 1,200 Deferred tax liability remeasurement — — (875) Total deferred (24,160) (5,730) (550) Total provision $ 24,880 $ 28,139 $ 22,613 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. 2020 2019 2018 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 $ 22,332 21.0 % $ 25,232 21.0 % $ 22,056 21.0 % (Decrease) increase in income taxes resulting from: Tax-exempt interest income (439) (0.4) (552) (0.5) (650) (0.6) State taxes, net of federal income tax benefit 3,424 3.2 4,064 3.4 3,315 3.2 Deferred tax liability remeasurement — — — — (875) (0.8) Other (437) (0.4) (605) (0.5) (1,233) (1.3) Total $ 24,880 23.4 % $ 28,139 23.4 % $ 22,613 21.5 % The tax expense related to gains (losses) on investment securities available-for-sale for the years 2020, 2019, and 2018 was approximately $67,000, $0, and $(83,000), respectively. The following table shows the composition of deferred tax assets and liabilities as of December 31, 2020 and 2019. (Dollars in thousands) 2020 2019 Deferred tax assets: Allowance for credit losses $ 35,696 $ 28,792 Tax credit carryforward 8,606 — Operating lease liability 5,704 5,899 Accruals for employee benefits 2,963 2,842 Capitalized loan costs 893 — Mortgage servicing 173 — Other 678 222 Total deferred tax assets 54,713 37,755 Deferred tax liabilities: Differing depreciable bases in premises and leased equipment 13,118 18,614 Right of use assets - leases 5,737 5,899 Differing bases in assets related to acquisitions 4,160 4,092 Tax advantaged partnerships 3,770 4,383 Net unrealized gains on securities available-for-sale 5,827 1,640 Mortgage servicing — 394 Capitalized loan costs — 1,207 Prepaid expenses 334 297 Other 300 544 Total deferred tax liabilities 33,246 37,070 Net deferred tax asset $ 21,467 $ 685 No valuation allowance for deferred tax assets was recorded at December 31, 2020 and 2019 as the Company believes it is more likely than not that all of the deferred tax assets will be realized. Additionally, the tax credit carryforward expires in 2040. The following table shows a reconciliation of the beginning and ending amounts of unrecognized tax benefits. (Dollars in thousands) 2020 2019 2018 Balance, beginning of year $ — $ — $ 1,112 Additions based on tax positions related to the current year — — — Additions for tax positions of prior years — — — Reductions for tax positions of prior years — — — Reductions due to lapse in statute of limitations — — — Settlements — — (1,112) Balance, end of year $ — $ — $ — The total amount of unrecognized tax benefits that would affect the effective tax rate if recognized was zero at December 31, 2020, 2019 and 2018. Interest and penalties are recognized through the income tax provision. For the years 2020, 2019 and 2018, the Company recognized approximately $0.00 million, $0.00 million and $(0.09) million in interest, net of tax effect, and penalties, respectively. There were no accrued interest and penalties at December 31, 2020, 2019 and 2018. Tax years that remain open and subject to audit include the federal 2017-2020 years and the Indiana 2017-2020 years. Additionally, in 2018 the Company reached a state tax settlement for the 2015-2017 years and as a result, recorded a reduction of unrecognized tax benefits in the amount of $1.11 million. The Company does not anticipate a significant change in the amount of uncertain tax positions within the next 12 months. The Tax Cuts and Jobs Act was enacted on December 22, 2017. The Act reduced the U.S. federal corporate tax rate from 35% to 21%. At December 31, 2017, the Company had not fully completed its accounting for the tax effects of enactment of the Act and recorded a provisional benefit of $2.61 million which is included as a component of Income Tax Expense on the Consolidated Statements of Income related to the remeasurement of its deferred tax balance. During the third quarter of 2018, the Company completed its accounting for the provisional amounts recognized at December 31, 2017 and recorded an additional $0.88 million benefit as provided by the SEC’s Staff Accounting Bulletin No. 118 , Income Tax Accounting Implications of the Tax Cuts and Jobs Act .

Contingent Liabilities, Commitm

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk	12 Months Ended
	Dec. 31, 2020
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 $0.33 million and $0.29 million as of December 31, 2020 and 2019, 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 2020 2019 Operating lease right of use assets Accrued income and other assets $ 23,825 $ 24,147 Operating lease liabilities Accrued expenses and other liabilities $ 23,688 $ 24,319 During 2019, the Company amended the lease agreement for its corporate office building by extending the lease term which resulted in an increase to its operating lease right of use assets of $14.65 million and an increase to its operating lease liabilities of $14.64 million. The following table shows the components of operating leases expense for the year ended December 31. (Dollars in thousands) Statement of Income classification 2020 2019 Operating lease cost Net occupancy expense $ 3,472 $ 3,487 Short-term lease cost Net occupancy expense 8 41 Variable lease (recovery of) cost Net occupancy expense (30) — Total operating lease cost $ 3,450 $ 3,528 Gross rental expense for the year ended December 31, 2018 was $3.73 million. 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) 2021 $ 3,639 2022 3,944 2023 3,590 2024 2,681 2025 2,497 Thereafter 9,194 Total lease payments 25,545 Less: imputed interest (1,857) Present value of operating lease liabilities $ 23,688 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) 2020 2019 Weighted average remaining lease term 10.17 years 10.88 years Weighted average discount rate 1.80 % 2.83 % Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,794 $ 3,768 During the year ended December 31, 2019, the Company recognized a net gain on the sale of an office building in the amount of $1.31 million. The Company commenced an operating lease with the buyer of the building to lease a portion of it for office space resulting in a new right of use asset and operating lease liability. There were no new significant leases that had not yet commenced as of December 31, 2020. Financial Instruments with Off-Balance-Sheet Risk — To meet the financing needs of our 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) 2020 2019 Amounts of commitments: Loan commitments to extend credit $ 1,140,892 $ 1,095,054 Standby letters of credit $ 24,884 $ 27,549 Commercial and similar letters of credit $ 7,095 $ 2,332 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, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial InstrumentsCommitments 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, 2020 and 2019. 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 $ 1,155,252 Other assets $ 46,654 Other liabilities $ 47,681 Loan commitments 32,588 Mortgages held for sale 1,487 N/A — Forward contracts - mortgage loan 38,310 N/A — Mortgages held for sale 290 Total - December 31, 2020 $ 1,226,150 $ 48,141 $ 47,971 Interest rate swap contracts $ 1,074,809 Other assets $ 21,975 Other liabilities $ 22,352 Loan commitments 9,950 Mortgages held for sale 185 N/A — Forward contracts - mortgage loan 23,632 N/A — Mortgages held for sale 38 Total - December 31, 2019 $ 1,108,391 $ 22,160 $ 22,390 The following table shows the amounts included on the Consolidated Statements of Income for non-hedging derivative financial instruments at December 31, 2020, 2019 and 2018. Gain (loss) (Dollars in thousands) Statement of Income classification 2020 2019 2018 Interest rate swap contracts Other expense $ (650) $ (252) $ (30) Interest rate swap contracts Other income 879 1,356 1,028 Loan commitments Mortgage banking 1,302 73 46 Forward contracts - mortgage loan Mortgage banking (252) 97 (125) Total $ 1,279 $ 1,274 $ 919 The following table shows the offsetting of financial assets and derivative assets at December 31, 2020 and 2019. 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, 2020 Interest rate swaps $ 52,872 $ 6,218 $ 46,654 $ — $ — $ 46,654 December 31, 2019 Interest rate swaps $ 22,279 $ 304 $ 21,975 $ — $ — $ 21,975 The following table shows the offsetting of financial liabilities and derivative liabilities at December 31, 2020 and 2019. 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, 2020 Interest rate swaps $ 53,899 $ 6,218 $ 47,681 $ 46,978 $ — $ 703 Repurchase agreements 143,564 — 143,564 143,564 — — Total $ 197,463 $ 6,218 $ 191,245 $ 190,542 $ — $ 703 December 31, 2019 Interest rate swaps $ 22,656 $ 304 $ 22,352 $ 23,482 $ — $ (1,130) Repurchase agreements 120,459 — 120,459 120,459 — — Total $ 143,115 $ 304 $ 142,811 $ 143,941 $ — $ (1,130) 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, 2020 and December 31, 2019, repurchase agreements had a remaining contractual maturity of $141.42 million and $119.45 million in overnight and $2.14 million and $1.01 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, 2020
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, 2020 and 2019. 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 2020 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 966,092 15.99 % $ 483,350 8.00 % $ 634,397 10.50 % $ 604,188 10.00 % 1st Source Bank 881,983 14.59 483,637 8.00 634,774 10.50 604,546 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 889,709 14.73 362,513 6.00 513,560 8.50 483,350 8.00 1st Source Bank 805,556 13.32 362,728 6.00 513,864 8.50 483,637 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 788,884 13.06 271,884 4.50 422,931 7.00 392,722 6.50 1st Source Bank 761,731 12.60 272,046 4.50 423,182 7.00 392,955 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 889,709 12.15 292,977 4.00 N/A N/A 366,221 5.00 1st Source Bank 805,556 11.00 292,959 4.00 N/A N/A 366,199 5.00 2019 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 882,453 14.90 % $ 473,782 8.00 % $ 621,839 10.50 % $ 592,227 10.00 % 1st Source Bank 804,131 13.57 474,189 8.00 622,373 10.50 592,736 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 807,926 13.64 355,336 6.00 503,393 8.50 473,782 8.00 1st Source Bank 729,541 12.31 355,642 6.00 503,826 8.50 474,189 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 743,467 12.55 266,502 4.50 414,559 7.00 384,948 6.50 1st Source Bank 722,082 12.18 266,731 4.50 414,915 7.00 385,279 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 807,926 12.19 265,122 4.00 N/A N/A 331,402 5.00 1st Source Bank 729,541 11.03 264,500 4.00 N/A N/A 330,625 5.00 The Bank was not required to maintain noninterest bearing cash balances with the Federal Reserve Bank as of December 31, 2020 and 2019. 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, 2020, 1st Source Bank met its minimum net worth capital requirements.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value MeasurementsThe 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, 2020 and 2019, 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, 2020 and 2019. (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Excess of fair value carrying amount over (under) unpaid principal December 31, 2020 Mortgages held for sale reported at fair value: Total Loans $ 12,885 $ 11,045 $ 1,840 (1) December 31, 2019 Mortgages held for sale reported at fair value: Total Loans $ 20,277 $ 19,890 $ 387 (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. • Inactively traded government-sponsored agency securities are primarily priced using consensus pricing and dealer quotes. • 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 (hedges) are valued using a market value approach and utilizing an appropriate current market yield and a loan commitment closing rate based on historical analysis. 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, 2020 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 80,285 $ 539,197 $ — $ 619,482 U.S. States and political subdivisions securities — 78,975 2,152 81,127 Mortgage-backed securities - Federal agencies — 453,789 — 453,789 Corporate debt securities — 42,369 — 42,369 Foreign government securities — 700 — 700 Total debt securities available-for-sale 80,285 1,115,030 2,152 1,197,467 Mortgages held for sale — 12,885 — 12,885 Accrued income and other assets (interest rate swap agreements) — 46,654 — 46,654 Total $ 80,285 $ 1,174,569 $ 2,152 $ 1,257,006 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 47,681 $ — $ 47,681 Total $ — $ 47,681 $ — $ 47,681 December 31, 2019 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 80,393 $ 446,571 $ — $ 526,964 U.S. States and political subdivisions securities — 82,213 2,292 84,505 Mortgage-backed securities - Federal agencies — 375,389 — 375,389 Corporate debt securities — 53,025 — 53,025 Foreign government securities — 700 — 700 Total debt securities available-for-sale 80,393 957,898 2,292 1,040,583 Mortgages held for sale — 20,277 — 20,277 Accrued income and other assets (interest rate swap agreements) — 21,975 — 21,975 Total $ 80,393 $ 1,000,150 $ 2,292 $ 1,082,835 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 22,352 $ — $ 22,352 Total $ — $ 22,352 $ — $ 22,352 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, 2020 $ 2,292 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income 58 Purchases 3,100 Issuances — Sales — Settlements — Maturities (3,298) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2020 $ 2,152 Beginning balance January 1, 2019 $ 1,025 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income (35) Purchases 5,600 Issuances — Sales — Settlements — Maturities (4,298) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2019 $ 2,292 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, 2020 or 2019. 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, 2020 Debt securities available-for-sale Direct placement municipal securities $ 2,152 Discounted cash flows Credit spread assumption 0.04% - 2.30% 1.55 % December 31, 2019 Debt securities available-for-sale Direct placement municipal securities $ 2,292 Discounted cash flows Credit spread assumption 0.12% - 2.85% 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 a 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, 2020 and 2019, respectively: collateral-dependent impaired loans - $7.73 million and $4.29 million; MSRs - $0.81 million and $0.00 million; repossessions - $1.07 million and $2.25 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, 2020 Collateral-dependent impaired loans $ — $ — $ 11,991 $ 11,991 Accrued income and other assets (mortgage servicing rights) — — 3,804 3,804 Accrued income and other assets (repossessions) — — 1,976 1,976 Accrued income and other assets (other real estate) — — 359 359 Total $ — $ — $ 18,130 $ 18,130 December 31, 2019 Collateral-dependent impaired loans $ — $ — $ 8,492 $ 8,492 Accrued income and other assets (mortgage servicing rights) — — 4,200 4,200 Accrued income and other assets (repossessions) — — 8,623 8,623 Accrued income and other assets (other real estate) — — 522 522 Total $ — $ — $ 21,837 $ 21,837 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, 2020 Collateral-dependent impaired loans $ 11,991 $ 11,991 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 0% - 100% 43.7 % Mortgage servicing rights 3,804 4,038 Discounted cash flows Constant prepayment rate (CPR) 16.2% - 30.5% 22.8 % Discount rate 8.3% - 11.1% 8.5 % Repossessions 1,976 2,144 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 16% 8 % Other real estate 359 388 Appraisals Discount for lack of marketability 6% - 13% 7 % December 31, 2019 Collateral-dependent impaired loans $ 8,492 $ 8,492 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 0% - 90% Mortgage servicing rights 4,200 5,986 Discounted cash flows Constant prepayment rate (CPR) 10.2% - 28.1% Discount rate 9.3% - 12.1% Repossessions 8,623 9,211 Appraisals, trade publications and auction values Discount for lack of marketability 3% - 25% Other real estate 522 564 Appraisals Discount for lack of marketability 0% - 11% 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, 2020 Assets: Cash and due from banks $ 74,186 $ 74,186 $ 74,186 $ — $ — Federal funds sold and interest bearing deposits with other banks 168,861 168,861 168,861 — — Investment securities, available-for-sale 1,197,467 1,197,467 80,285 1,115,030 2,152 Other investments 27,429 27,429 27,429 — — Mortgages held for sale 12,885 12,885 — 12,885 — Loans and leases, net of allowance for loan and lease losses 5,348,647 5,417,396 — — 5,417,396 Mortgage servicing rights 3,804 4,038 — — 4,038 Accrued interest receivable 20,242 20,242 — 20,242 — Interest rate swaps 46,654 46,654 — 46,654 — Liabilities: Deposits $ 5,946,028 $ 5,955,545 $ 4,778,671 $ 1,176,874 $ — Short-term borrowings 150,641 150,641 143,730 6,911 — Long-term debt and mandatorily redeemable securities 81,864 82,965 — 82,965 — Subordinated notes 58,764 58,560 — 58,560 — Accrued interest payable 3,996 3,996 — 3,996 — Interest rate swaps 47,681 47,681 — 47,681 — Off-balance-sheet instruments * — 321 — 321 — December 31, 2019 Assets: Cash and due from banks $ 67,215 $ 67,215 $ 67,215 $ — $ — Federal funds sold and interest bearing deposits with other banks 16,150 16,150 16,150 — — Investment securities, available-for-sale 1,040,583 1,040,583 80,393 957,898 2,292 Other investments 28,414 28,414 28,414 — — Mortgages held for sale 20,277 20,277 — 20,277 — Loans and leases, net of allowance for loan and lease losses 4,974,273 4,992,684 — — 4,992,684 Mortgage servicing rights 4,200 5,986 — — 5,986 Accrued interest receivable 19,125 19,125 — 19,125 — Interest rate swaps 21,975 21,975 — 21,975 — Liabilities: Deposits $ 5,357,326 $ 5,362,633 $ 3,708,828 $ 1,653,805 $ — Short-term borrowings 145,893 145,893 120,891 25,002 — Long-term debt and mandatorily redeemable securities 71,639 71,084 — 71,084 — Subordinated notes 58,764 61,469 — 61,469 — Accrued interest payable 13,918 13,918 — 13,918 — Interest rate swaps 22,352 22,352 — 22,352 — Off-balance-sheet instruments * — 281 — 281 — * 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.

1st Source Corporation (Parent

1st Source Corporation (Parent Company Only) Financial Information	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 ASSETS Cash and cash equivalents $ 113,242 $ 107,285 Short-term investments with bank subsidiary 500 500 Investments in: Bank subsidiaries 858,993 806,192 Non-bank subsidiaries 1 1 Right of use assets 17,452 17,106 Other assets 5,251 4,442 Total assets $ 995,439 $ 935,526 LIABILITIES AND SHAREHOLDERS’ EQUITY Commercial paper $ 4,767 $ 3,993 Long-term debt and mandatorily redeemable securities 26,681 25,819 Subordinated notes 58,764 58,764 Operating lease liability 17,369 17,329 Other liabilities 1,013 1,344 Total liabilities 108,594 107,249 Total shareholders’ equity 886,845 828,277 Total liabilities and shareholders’ equity $ 995,439 $ 935,526 STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Year Ended December 31 (Dollars in thousands) 2020 2019 2018 Income: Dividends from bank subsidiary $ 46,207 $ 46,735 $ 45,080 Rental (reimbursements to) income from subsidiaries (908) 2,505 2,613 Other 293 366 367 Investment securities and other investment (losses) gains (44) 109 (180) Total income 45,548 49,715 47,880 Expenses: Interest on subordinated notes 3,367 3,677 3,625 Interest on long-term debt and mandatorily redeemable securities 2,151 2,228 1,624 Interest on commercial paper and other short-term borrowings 11 13 14 Occupancy 1,816 1,861 1,774 Other 667 586 642 Total expenses 8,012 8,365 7,679 Income before income tax benefit and equity in undistributed income of subsidiaries 37,536 41,350 40,201 Income tax benefit 1,747 987 1,009 Income before equity in undistributed income of subsidiaries 39,283 42,337 41,210 Equity in undistributed income of subsidiaries: Bank subsidiaries 42,178 49,678 41,204 Net income $ 81,461 $ 92,015 $ 82,414 Comprehensive income $ 94,660 $ 107,863 $ 75,788 STATEMENTS OF CASH FLOWS Year Ended December 31 (Dollars in thousands) 2020 2019 2018 Operating activities: Net income $ 81,461 $ 92,015 $ 82,414 Adjustments to reconcile net income to net cash provided by operating activities: Equity (undistributed) distributed in excess of income of subsidiaries (42,178) (49,678) (41,204) Depreciation of premises and equipment 2 2 2 Amortization of right of use assets 1,107 1,350 — Stock-based compensation 94 78 71 Realized/unrealized investment securities and other investment losses (gains) 44 (109) 180 Other (103) 533 45 Net change in operating activities 40,427 44,191 41,508 Investing activities: Net change in partnership investments (182) (260) (980) Capital contribution to subsidiary — (325) — Net change in investing activities (182) (585) (980) Financing activities: Net change in commercial paper 774 (332) (1,790) Proceeds from issuance of long-term debt and mandatorily redeemable securities 1,640 1,611 1,867 Payments on long-term debt and mandatorily redeemable securities (2,268) (2,068) (1,064) Stock issued under stock purchase plans 39 49 145 Net proceeds from issuance of treasury stock 1,706 1,878 1,763 Acquisition of treasury stock (6,415) (15,085) (9,271) Cash dividends paid on common stock (29,764) (29,021) (25,686) Net change in financing activities (34,288) (42,968) (34,036) Net change in cash and cash equivalents 5,957 638 6,492 Cash and cash equivalents, beginning of year 107,285 106,647 100,155 Cash and cash equivalents, end of year $ 113,242 $ 107,285 $ 106,647

Accounting Policies (Policies)

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
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 22, 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, 2020 and 2019, 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.
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. 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. Effective Janaury 1, 2019, as part of the new leasing standard, only those costs incurred as a direct result of closing a lease transaction are capitalized. All existing deferrals will continue to be amortized over the estimated life of the lease while all new incremental direct costs are expensed immediately. Accrued interest is included in Accrued Income and Other Assets on the Consolidated Statements of Financial Condition and is excluded from the calculation of the allowance for credit losses. 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. Loans and leases that have been modified and economic concessions have been granted to borrowers who have experienced financial difficulties are considered a troubled debt restructuring (TDR). These concessions typically result from the Company’s loss mitigation activities and may include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Certain TDRs are classified as nonperforming at the time of restructuring and typically are returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period of at least six months. When the Company modifies loans and leases in a TDR, it evaluates any possible impairment based on the present value of expected future cash flows, discounted at the contractual interest rate of the original loan or lease agreement, or uses the current fair value of the collateral, less selling costs for collateral dependent loans. 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. In periods subsequent to modification, the Company evaluates all TDRs, including those that have payment defaults, for possible impairment and recognizes impairment through the allowance for loan and lease losses. On March 27, 2020, the President of the United States signed the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), which provides entities with optional temporary relief from certain accounting and financial reporting requirements under U.S. GAAP. Section 4013 of the CARES Act allows financial institutions to suspend application of certain TDR accounting guidance for loan and lease modifications related to the COVID-19 pandemic made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the end of the COVID-19 national emergency, provided certain criteria are met. Section 4013 of the CARES Act was amended on December 27, 2020 to extend this relief until January 1, 2022. The relief can be applied to loan and lease modifications for borrowers that were not more than 30 days past due as of December 31, 2019 and to loan and lease modifications that defer or delay the payment of principal or interest, or change the interest rate on the loan. The Company chose to apply this relief to eligible loan and lease modifications. At December 31, 2020, loan and lease modification balances related to the COVID-19 pandemic were $129 million.
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. Gains and losses on the sale of MSRs are recognized in Noninterest Income on the 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.
Allowance for credit losses	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 — Effective January 1, 2020, the allowance for credit losses is established for current expected credit losses on the Company’s loan and lease portfolio. Prior to January 1, 2020, the allowance was established based on an incurred loss model. 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 eight 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 is 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 impairment. 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 troubled debt restructurings (TDRs). 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, impairment 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 cancellable by the Company. The liability for credit losses on unfunded loan commitments is adjusted as a provision for credit losses in Other Noninterest Expense 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 estimates future rent increases and records the actual difference to variable costs. 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, 2020 and 2019, other real estate had carrying values of $0.36 million and $0.52 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 $1.98 million and $8.62 million, as of December 31, 2020 and 2019, 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 has historically evaluated goodwill for impairment during the fourth quarter of each year, with financial data as of September 30. During the first quarter of 2020, management determined that the deterioration in general economic conditions as a result of the COVID-19 pandemic and responses thereto represented a triggering event prompting an evaluation of goodwill impairment. Based on the analyses performed each quarter of 2020, the Company determined that goodwill was not impaired.
Partnership Investments	Partnership Investments — The partnerships in which the Company has investments account for their investments at fair value. As a result, the Company’s investments in these partnerships reflect the underlying fair value of the partnerships’ investments. The Company accounts for its investments in partnerships for which it owns three percent or more of the partnership on the equity method. The Company accounts for its investments in partnerships of which it owns less than three percent at fair value less impairment. 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 cash percentages vary at different points in time and 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, 2020 and 2019 were $76.35 million and $61.08 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 notes, 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 incomes 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 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.
Net Income Per Common Share	Net Income Per Common Share — 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. Diluted 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, plus the dilutive effect of outstanding stock options, stock warrants and nonvested stock-based compensation awards.
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.
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 consolidated 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.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Standards Update and Change in Accounting Principle	The main drivers of the adjustment to retained earnings are summarized in the following table. (Dollar in thousands) Pre-ASC 326 Adoption Impact of ASC 326 As Reported Under Allowance for credit losses Commercial and agricultural $ 23,671 $ (655) $ 23,016 Auto and light truck 14,400 (1,303) 13,097 Medium and heavy duty truck 4,612 2,414 7,026 Aircraft 31,058 484 31,542 Construction equipment 14,120 372 14,492 Commercial real estate 18,350 (649) 17,701 Residential real estate and home equity 3,609 1,688 5,297 Consumer 1,434 233 1,667 Total allowance for credit losses on loans and leases 111,254 2,584 113,838 Accrued expenses and other liabilities (unfunded loan commitments) 3,172 777 3,949 Total allowance for credit losses $ 114,426 $ 3,361 $ 117,787

Investment Securities Availab_2

Investment Securities Available-For-Sale (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 U.S. Treasury and Federal agencies securities $ 610,195 $ 9,521 $ (234) $ 619,482 U.S. States and political subdivisions securities 78,812 2,346 (31) 81,127 Mortgage-backed securities - Federal agencies 442,748 11,237 (196) 453,789 Corporate debt securities 40,813 1,556 — 42,369 Foreign government securities 700 — — 700 Total investment securities available-for-sale $ 1,173,268 $ 24,660 $ (461) $ 1,197,467 December 31, 2019 U.S. Treasury and Federal agencies securities $ 524,896 $ 2,538 $ (470) $ 526,964 U.S. States and political subdivisions securities 83,566 1,048 (109) 84,505 Mortgage-backed securities - Federal agencies 372,458 3,948 (1,017) 375,389 Corporate debt securities 52,151 890 (16) 53,025 Foreign government securities 700 — — 700 Total investment securities available-for-sale $ 1,033,771 $ 8,424 $ (1,612) $ 1,040,583
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, 2020. 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 $ 115,555 $ 116,556 Due after one year through five years 525,017 537,183 Due after five years through ten years 89,368 89,359 Due after ten years 580 580 Mortgage-backed securities 442,748 453,789 Total debt securities available-for-sale $ 1,173,268 $ 1,197,467
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, 2020, the Company’s available-for-sale securities portfolio consisted of 623 securities, 54 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, 2020 U.S. Treasury and Federal agencies securities $ 136,534 $ (234) $ — $ — $ 136,534 $ (234) U.S. States and political subdivisions securities 6,391 (30) 199 (1) 6,590 (31) Mortgage-backed securities - Federal agencies 67,736 (187) 3,274 (9) 71,010 (196) Corporate debt securities — — — — — — Foreign government securities 200 — — — 200 — Total debt securities available-for-sale $ 210,861 $ (451) $ 3,473 $ (10) $ 214,334 $ (461) December 31, 2019 U.S. Treasury and Federal agencies securities $ 87,352 $ (171) $ 69,053 $ (299) $ 156,405 $ (470) U.S. States and political subdivisions securities 9,283 (107) 1,042 (2) 10,325 (109) Mortgage-backed securities - Federal agencies 81,951 (383) 51,165 (634) 133,116 (1,017) Corporate debt securities — — 8,091 (16) 8,091 (16) Foreign government securities — — — — — — Total debt securities available-for-sale $ 178,586 $ (661) $ 129,351 $ (951) $ 307,937 $ (1,612)
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 securities available-for-sale portfolio, including marketable equity securities. (Dollars in thousands) 2020 2019 2018 Gross realized gains $ 285 $ — $ 2 Gross realized losses (6) — (347) Net realized gains (losses) $ 279 $ — $ (345)

Loan and Lease Financings (Tabl

Loan and Lease Financings (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020. Term Loans and Leases by Origination Year (Dollars in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Revolving Loans Converted to Term Total Commercial and agricultural Grades 1-6 $ 666,905 $ 193,555 $ 134,411 $ 92,916 $ 26,034 $ 19,790 $ 291,990 $ — $ 1,425,601 Grades 7-12 6,788 1,699 4,726 3,507 1,200 2,134 33,067 — 53,121 Total commercial and agricultural 673,693 195,254 139,137 96,423 27,234 21,924 325,057 — 1,478,722 Auto and light truck Grades 1-6 248,932 141,841 52,749 24,101 4,210 608 — — 472,441 Grades 7-12 19,113 27,136 12,796 8,612 2,250 21 — — 69,928 Total auto and light truck 268,045 168,977 65,545 32,713 6,460 629 — — 542,369 Medium and heavy duty truck Grades 1-6 92,698 88,314 44,205 31,773 15,644 4,840 — — 277,474 Grades 7-12 — 978 — — 632 88 — — 1,698 Total medium and heavy duty truck 92,698 89,292 44,205 31,773 16,276 4,928 — — 279,172 Aircraft Grades 1-6 429,283 153,358 93,042 95,457 43,972 20,966 6,370 — 842,448 Grades 7-12 11,519 2,561 479 596 2,187 1,670 — — 19,012 Total aircraft 440,802 155,919 93,521 96,053 46,159 22,636 6,370 — 861,460 Construction equipment Grades 1-6 311,174 180,550 96,320 42,713 12,624 5,722 17,502 737 667,342 Grades 7-12 17,518 13,743 10,642 398 237 85 2,988 1,935 47,546 Total construction equipment 328,692 194,293 106,962 43,111 12,861 5,807 20,490 2,672 714,888 Commercial real estate Grades 1-6 190,725 204,477 173,847 175,009 69,022 122,762 373 — 936,215 Grades 7-12 9,518 7,990 5,173 6,684 1,762 2,522 — — 33,649 Total commercial real estate 200,243 212,467 179,020 181,693 70,784 125,284 373 — 969,864 Residential real estate and home equity Performing 133,829 65,690 18,194 22,929 41,847 86,106 135,255 5,703 509,553 Nonperforming — — 21 14 — 1,435 247 109 1,826 Total residential real estate and home equity 133,829 65,690 18,215 22,943 41,847 87,541 135,502 5,812 511,379 Consumer Performing 43,824 34,409 18,904 7,005 2,259 793 23,869 — 131,063 Nonperforming 2 99 78 36 8 2 159 — 384 Total consumer $ 43,826 $ 34,508 $ 18,982 $ 7,041 $ 2,267 $ 795 $ 24,028 $ — $ 131,447
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, 2020 Commercial and agricultural $ 1,472,755 $ 34 $ — $ — $ 1,472,789 $ 5,933 $ 1,478,722 Auto and light truck 504,659 560 205 — 505,424 36,945 542,369 Medium and heavy duty truck 278,452 — — — 278,452 720 279,172 Aircraft 860,632 — — — 860,632 828 861,460 Construction equipment 701,124 1,093 298 — 702,515 12,373 714,888 Commercial real estate 968,370 — — — 968,370 1,494 969,864 Residential real estate and home equity 508,532 782 239 108 509,661 1,718 511,379 Consumer 130,458 504 101 7 131,070 377 131,447 Total $ 5,424,982 $ 2,973 $ 843 $ 115 $ 5,428,913 $ 60,388 $ 5,489,301 December 31, 2019 Commercial and agricultural $ 1,131,704 $ 118 $ — $ — $ 1,131,822 $ 969 $ 1,132,791 Auto and light truck 586,212 1,268 77 — 587,557 1,250 588,807 Medium and heavy duty truck 293,736 14 — — 293,750 1,074 294,824 Aircraft 772,846 7,026 3,293 — 783,165 875 784,040 Construction equipment 702,671 819 609 — 704,099 1,352 705,451 Commercial real estate 906,468 58 — — 906,526 1,651 908,177 Residential real estate and home equity 528,844 561 152 257 529,814 2,189 532,003 Consumer 138,132 632 187 54 139,005 429 139,434 Total $ 5,060,613 $ 10,496 $ 4,318 $ 311 $ 5,075,738 $ 9,789 $ 5,085,527
Schedule of impaired loans and leases, segregated by class, and the corresponding reserve for impaired loan and lease losses	The following table shows impaired loans and leases, segregated by portfolio segment, and the corresponding allowance for impaired loans and leases. (Dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance December 31, 2019 With no related allowance recorded: Commercial and agricultural $ 218 $ 218 $ — Auto and light truck 853 853 — Medium and heavy duty truck 1,074 1,074 — Aircraft 875 875 — Construction equipment 615 615 — Commercial real estate 1,487 1,487 — Residential real estate and home equity — — — Consumer — — — Total with no related allowance recorded 5,122 5,122 — With an allowance recorded: Commercial and agricultural 10,366 10,366 3,003 Auto and light truck 278 278 30 Medium and heavy duty truck — — — Aircraft — — — Construction equipment 736 736 75 Commercial real estate — — — Residential real estate and home equity 337 339 117 Consumer — — — Total with an allowance recorded 11,717 11,719 3,225 Total impaired loans $ 16,839 $ 16,841 $ 3,225
Schedule of average recorded investment and interest income recognized on impaired loans and leases, segregated by class	The following table shows average recorded investment and interest income recognized on impaired loans and leases, segregated by portfolio segment, for the years ending December 31, 2019 and 2018. 2019 2018 (Dollars in thousands) Average Interest Average Interest Commercial and agricultural $ 5,983 $ 242 $ 2,812 $ — Auto and light truck 2,721 — 9,352 — Medium and heavy duty truck 244 — 247 — Aircraft 2,409 8 9,987 20 Construction equipment 1,664 — 1,663 — Commercial real estate 1,715 — 2,303 — Residential real estate and home equity 340 19 347 15 Consumer loans — — — — Total $ 15,076 $ 269 $ 26,711 $ 35
Schedule of loans and leases classified as troubled debt restructuring and number of modifications	The following table shows the number of loans and leases classified as troubled debt restructuring (TDR) during 2020, 2019 and 2018, by portfolio segment, as well as the recorded investment as of December 31. The classification between nonperforming and performing is shown at the time of modification. Modification programs focused on extending maturity dates or modifying payment patterns with most TDRs experiencing a combination of concessions. The modifications did not result in the contractual forgiveness of principal or interest. The TDRs during 2020 were the result of issues that predated the COVID-19 pandemic. There were two modifications during 2020, one modification during 2019, and no modifications during 2018 that resulted in an interest rate reduction below market rate. Consequently, the financial impact of the modifications was immaterial. 2020 2019 2018 (Dollars in thousands) Number of Modifications Recorded Investment Number of Modifications Recorded Investment Number of Modifications Recorded Investment Performing TDRs: Commercial and agricultural — $ — 1 $ 9,901 — $ — Auto and light truck — — — — — — Medium and heavy duty truck — — — — — — Aircraft — — — — — — Construction equipment — — — — — — Commercial real estate — — — — — — Residential real estate and home equity — — — — — — Consumer — — — — — — Total performing TDR modifications — — 1 9,901 — — Nonperforming TDRs: Commercial and agricultural — — 1 465 — — Auto and light truck — — — — 1 285 Medium and heavy duty truck — — — — — — Aircraft 1 828 — — — — Construction equipment 1 9,905 — — — — Commercial real estate — — — — — — Residential real estate and home equity — — — — — — Consumer — — — — — — Total nonperforming TDR modifications 2 10,733 1 465 1 285 Total TDR modifications 2 $ 10,733 2 $ 10,366 1 $ 285
Schedule of recorded investment in loans and leases classified as troubled debt restructuring	The following table shows the recorded investment of loans and leases classified as troubled debt restructurings as of December 31. Year Ended December 31 (Dollars in thousands) 2020 2019 Performing TDRs $ 330 $ 10,238 Nonperforming TDRs 11,156 486 Total TDRs $ 11,486 $ 10,724

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2020
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 Auto and light truck Medium and heavy duty truck Aircraft Construction equipment Commercial real estate Residential real estate and home equity Consumer Total 2020 Balance, beginning of year $ 23,671 $ 14,400 $ 4,612 $ 31,058 $ 14,120 $ 18,350 $ 3,609 $ 1,434 $ 111,254 Impact of ASC 326 adoption (655) (1,303) 2,414 484 372 (649) 1,688 233 2,584 Adjusted balance, beginning of year 23,016 13,097 7,026 31,542 14,492 17,701 5,297 1,667 113,838 Charge-offs 903 7,107 15 855 4,090 37 74 893 13,974 Recoveries 663 499 18 1,800 1,415 58 33 303 4,789 Net charge-offs 240 6,608 (3) (945) 2,675 (21) 41 590 9,185 Provision (recovery of provision) (547) 22,437 (629) 1,566 7,349 5,036 118 671 36,001 Balance, end of year $ 22,229 $ 28,926 $ 6,400 $ 34,053 $ 19,166 $ 22,758 $ 5,374 $ 1,748 $ 140,654 2019 Balance, beginning of year $ 17,063 $ 14,689 $ 4,303 $ 33,047 $ 10,922 $ 15,705 $ 3,425 $ 1,315 $ 100,469 Charge-offs 1,040 991 1,132 3,066 238 5 53 1,066 7,591 Recoveries 664 97 32 1,143 160 75 85 287 2,543 Net charge-offs (recoveries) 376 894 1,100 1,923 78 (70) (32) 779 5,048 Provision (recovery of provision) 6,984 605 1,409 (66) 3,276 2,575 152 898 15,833 Balance, end of year $ 23,671 $ 14,400 $ 4,612 $ 31,058 $ 14,120 $ 18,350 $ 3,609 $ 1,434 $ 111,254 2018 Balance, beginning of year $ 16,228 $ 10,103 $ 4,844 $ 34,619 $ 9,343 $ 14,792 $ 3,666 $ 1,288 $ 94,883 Charge-offs 229 3,308 23 12,222 288 70 63 909 17,112 Recoveries 222 68 — 2,499 100 53 23 271 3,236 Net charge-offs (recoveries) 7 3,240 23 9,723 188 17 40 638 13,876 Provision (recovery of provision) 842 7,826 (518) 8,151 1,767 930 (201) 665 19,462 Balance, end of year $ 17,063 $ 14,689 $ 4,303 $ 33,047 $ 10,922 $ 15,705 $ 3,425 $ 1,315 $ 100,469
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) 2020 2019 2018 Balance, beginning of year $ 3,172 $ 3,075 $ 3,050 Impact of ASC 326 adoption 777 — — Adjusted balance, beginning of year 3,949 3,075 3,050 Provision (recovery of provision) 550 97 25 Balance, end of year $ 4,499 $ 3,172 $ 3,075

Lease Investments (Tables)

Lease Investments (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 Direct finance leases: Minimum lease payments $ 160,508 $ 190,879 Estimated unguaranteed residual values — 41 Less: Unearned income (21,507) (30,568) Net investment in direct finance leases $ 139,001 $ 160,352 Operating leases: Gross investment in operating leases $ 116,818 $ 176,485 Accumulated depreciation (51,778) (64,801) Net investment in operating leases $ 65,040 $ 111,684
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, 2020. (Dollars in thousands) Direct Operating Leases 2021 $ 34,123 $ 16,784 2022 31,867 12,995 2023 29,791 7,676 2024 18,042 3,859 2025 14,822 1,636 Thereafter 31,863 242 Total $ 160,508 $ 43,192
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) 2020 2019 2018 Direct finance leases: Interest income on lease receivable $ 8,258 $ 10,985 $ 13,052 Operating leases: Income related to lease payments $ 23,380 $ 30,741 $ 31,793 Depreciation expense 20,203 25,128 26,248

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	The following table shows premises and equipment as of December 31. (Dollars in thousands) 2020 2019 Land $ 15,505 $ 15,222 Buildings and improvements 60,488 59,508 Furniture and equipment 42,672 41,831 Total premises and equipment 118,665 116,561 Accumulated depreciation and amortization (69,292) (64,342) Net premises and equipment $ 49,373 $ 52,219

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 Mortgage servicing rights: Balance at beginning of year $ 4,200 $ 4,283 Additions 2,777 1,229 Amortization (2,361) (1,312) Sales — — Carrying value before valuation allowance at end of year 4,616 4,200 Valuation allowance: Balance at beginning of year — — Impairment charges (812) — Balance at end of year $ (812) $ — Net carrying value of mortgage servicing rights at end of year $ 3,804 $ 4,200 Fair value of mortgage servicing rights at end of year $ 4,038 $ 5,986

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 Other intangibles: Gross carrying amount $ 146 $ 204 Less: accumulated amortization (64) (100) Net carrying amount $ 82 $ 104

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020, by time remaining until maturity. (Dollars in thousands) Under 3 months $ 117,444 4 – 6 months 83,262 7 – 12 months 80,237 Over 12 months 172,214 Total $ 453,157
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, 2020. (Dollars in thousands) 2021 $ 834,723 2022 170,270 2023 108,353 2024 41,353 2025 7,789 Thereafter 4,869 Total $ 1,167,357

Borrowed Funds and Mandatoril_2

Borrowed Funds and Mandatorily Redeemable Securities (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. (Dollars in thousands) 2020 2019 Federal Home Loan Bank borrowings (0.54% – 5.04%) $ 55,183 $ 45,819 Mandatorily redeemable securities 20,358 17,972 Other long-term debt 6,323 7,848 Total long-term debt and mandatorily redeemable securities $ 81,864 $ 71,639
Schedule of short-term borrowings	The following table shows the details of short-term borrowings as of December 31, 2020 and 2019. 2020 2019 (Dollars in thousands) Amount Weighted Average Rate Amount Weighted Average Rate Federal funds purchased $ — — % $ — — % Security repurchase agreements 143,564 0.08 120,459 0.23 Commercial paper 4,766 0.13 3,993 0.29 Federal Home Loan Bank advances — — 20,000 1.61 Other short-term borrowings 2,311 — 1,441 — Total short-term borrowings $ 150,641 0.08 % $ 145,893 0.42 %

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. (Dollars in thousands) 2020 2019 Investment carrying amount $ 22,742 $ 19,843 Unfunded capital and other commitments 26,716 17,420 Maximum exposure to loss 52,106 37,904
Summary of subordinated notes	The following table shows subordinated notes at December 31, 2020. (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 1.70 % 9/15/2037 Total $ 58,764 (1) Fixed rate through life of debt. (2) 3-Month LIBOR +1.48% through remaining life of debt.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 2018 Distributed earnings allocated to common stock $ 28,859 $ 28,188 $ 24,894 Undistributed earnings allocated to common stock 52,044 63,254 56,975 Net earnings allocated to common stock 80,903 91,442 81,869 Net earnings allocated to participating securities 534 518 545 Net income allocated to common stock and participating securities $ 81,437 $ 91,960 $ 82,414 Weighted average shares outstanding for basic earnings per common share 25,527,154 25,600,138 25,937,599 Dilutive effect of stock compensation — — — Weighted average shares outstanding for diluted earnings per common share 25,527,154 25,600,138 25,937,599 Basic earnings per common share $ 3.17 $ 3.57 $ 3.16 Diluted earnings per common share $ 3.17 $ 3.57 $ 3.16

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of reclassifications out of accumulated other comprehensive income	The following table presents reclassifications out of accumulated other comprehensive income related to unrealized gains and losses on available-for-sale securities for the two years ending December 31. (Dollars in thousands) 2020 2019 Affected Line Item in the Statements of Income Realized gains included in net income $ 279 $ — Gains (losses) on investment securities available-for-sale 279 — Income before income taxes Tax effect (65) — Income tax expense Net of tax $ 214 $ — Net income

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2018 676,444 295,926 $ 27.41 Shares authorized - 2018 EIP 70,461 — — Granted (74,981) 74,981 29.11 Stock awards vested — (106,513) 25.79 Forfeited 3,135 (10,575) 27.51 Balance, December 31, 2018 675,059 253,819 28.59 Shares authorized - 2019 EIP 62,538 — — Granted (74,336) 74,336 31.44 Stock awards vested — (100,299) 28.35 Forfeited 1,241 (8,865) 30.28 Balance, December 31, 2019 664,502 218,991 29.60 Shares authorized - 2020 EIP 60,233 — — Granted (147,576) 147,576 37.41 Stock awards vested — (74,203) 28.95 Forfeited 49 (870) 31.82 Balance, December 31, 2020 577,208 291,494 $ 33.71

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 2018 Current: Federal $ 42,411 $ 28,130 $ 20,167 State 6,629 5,739 2,996 Total current 49,040 33,869 23,163 Deferred: Federal (21,865) (5,135) (875) State (2,295) (595) 1,200 Deferred tax liability remeasurement — — (875) Total deferred (24,160) (5,730) (550) Total provision $ 24,880 $ 28,139 $ 22,613
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. 2020 2019 2018 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 $ 22,332 21.0 % $ 25,232 21.0 % $ 22,056 21.0 % (Decrease) increase in income taxes resulting from: Tax-exempt interest income (439) (0.4) (552) (0.5) (650) (0.6) State taxes, net of federal income tax benefit 3,424 3.2 4,064 3.4 3,315 3.2 Deferred tax liability remeasurement — — — — (875) (0.8) Other (437) (0.4) (605) (0.5) (1,233) (1.3) Total $ 24,880 23.4 % $ 28,139 23.4 % $ 22,613 21.5 %
Schedule of deferred tax assets and liabilities	The following table shows the composition of deferred tax assets and liabilities as of December 31, 2020 and 2019. (Dollars in thousands) 2020 2019 Deferred tax assets: Allowance for credit losses $ 35,696 $ 28,792 Tax credit carryforward 8,606 — Operating lease liability 5,704 5,899 Accruals for employee benefits 2,963 2,842 Capitalized loan costs 893 — Mortgage servicing 173 — Other 678 222 Total deferred tax assets 54,713 37,755 Deferred tax liabilities: Differing depreciable bases in premises and leased equipment 13,118 18,614 Right of use assets - leases 5,737 5,899 Differing bases in assets related to acquisitions 4,160 4,092 Tax advantaged partnerships 3,770 4,383 Net unrealized gains on securities available-for-sale 5,827 1,640 Mortgage servicing — 394 Capitalized loan costs — 1,207 Prepaid expenses 334 297 Other 300 544 Total deferred tax liabilities 33,246 37,070 Net deferred tax asset $ 21,467 $ 685
Schedule of reconciliation of the beginning and ending amounts of unrecognized tax benefits	The following table shows a reconciliation of the beginning and ending amounts of unrecognized tax benefits. (Dollars in thousands) 2020 2019 2018 Balance, beginning of year $ — $ — $ 1,112 Additions based on tax positions related to the current year — — — Additions for tax positions of prior years — — — Reductions for tax positions of prior years — — — Reductions due to lapse in statute of limitations — — — Settlements — — (1,112) Balance, end of year $ — $ — $ —

Contingent Liabilities, Commi_2

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2020
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 2020 2019 Operating lease right of use assets Accrued income and other assets $ 23,825 $ 24,147 Operating lease liabilities Accrued expenses and other liabilities $ 23,688 $ 24,319
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 2020 2019 Operating lease cost Net occupancy expense $ 3,472 $ 3,487 Short-term lease cost Net occupancy expense 8 41 Variable lease (recovery of) cost Net occupancy expense (30) — Total operating lease cost $ 3,450 $ 3,528
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) 2021 $ 3,639 2022 3,944 2023 3,590 2024 2,681 2025 2,497 Thereafter 9,194 Total lease payments 25,545 Less: imputed interest (1,857) Present value of operating lease liabilities $ 23,688
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) 2020 2019 Weighted average remaining lease term 10.17 years 10.88 years Weighted average discount rate 1.80 % 2.83 % Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,794 $ 3,768
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) 2020 2019 Amounts of commitments: Loan commitments to extend credit $ 1,140,892 $ 1,095,054 Standby letters of credit $ 24,884 $ 27,549 Commercial and similar letters of credit $ 7,095 $ 2,332

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. 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 $ 1,155,252 Other assets $ 46,654 Other liabilities $ 47,681 Loan commitments 32,588 Mortgages held for sale 1,487 N/A — Forward contracts - mortgage loan 38,310 N/A — Mortgages held for sale 290 Total - December 31, 2020 $ 1,226,150 $ 48,141 $ 47,971 Interest rate swap contracts $ 1,074,809 Other assets $ 21,975 Other liabilities $ 22,352 Loan commitments 9,950 Mortgages held for sale 185 N/A — Forward contracts - mortgage loan 23,632 N/A — Mortgages held for sale 38 Total - December 31, 2019 $ 1,108,391 $ 22,160 $ 22,390
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, 2020, 2019 and 2018. Gain (loss) (Dollars in thousands) Statement of Income classification 2020 2019 2018 Interest rate swap contracts Other expense $ (650) $ (252) $ (30) Interest rate swap contracts Other income 879 1,356 1,028 Loan commitments Mortgage banking 1,302 73 46 Forward contracts - mortgage loan Mortgage banking (252) 97 (125) Total $ 1,279 $ 1,274 $ 919
Schedule of offsetting of financial assets and derivative assets	The following table shows the offsetting of financial assets and derivative assets at December 31, 2020 and 2019. 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, 2020 Interest rate swaps $ 52,872 $ 6,218 $ 46,654 $ — $ — $ 46,654 December 31, 2019 Interest rate swaps $ 22,279 $ 304 $ 21,975 $ — $ — $ 21,975
Schedule of offsetting of financial liabilities and derivative liabilities	The following table shows the offsetting of financial liabilities and derivative liabilities at December 31, 2020 and 2019. 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, 2020 Interest rate swaps $ 53,899 $ 6,218 $ 47,681 $ 46,978 $ — $ 703 Repurchase agreements 143,564 — 143,564 143,564 — — Total $ 197,463 $ 6,218 $ 191,245 $ 190,542 $ — $ 703 December 31, 2019 Interest rate swaps $ 22,656 $ 304 $ 22,352 $ 23,482 $ — $ (1,130) Repurchase agreements 120,459 — 120,459 120,459 — — Total $ 143,115 $ 304 $ 142,811 $ 143,941 $ — $ (1,130)

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. 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 2020 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 966,092 15.99 % $ 483,350 8.00 % $ 634,397 10.50 % $ 604,188 10.00 % 1st Source Bank 881,983 14.59 483,637 8.00 634,774 10.50 604,546 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 889,709 14.73 362,513 6.00 513,560 8.50 483,350 8.00 1st Source Bank 805,556 13.32 362,728 6.00 513,864 8.50 483,637 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 788,884 13.06 271,884 4.50 422,931 7.00 392,722 6.50 1st Source Bank 761,731 12.60 272,046 4.50 423,182 7.00 392,955 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 889,709 12.15 292,977 4.00 N/A N/A 366,221 5.00 1st Source Bank 805,556 11.00 292,959 4.00 N/A N/A 366,199 5.00 2019 Total Capital (to Risk-Weighted Assets): 1st Source Corporation $ 882,453 14.90 % $ 473,782 8.00 % $ 621,839 10.50 % $ 592,227 10.00 % 1st Source Bank 804,131 13.57 474,189 8.00 622,373 10.50 592,736 10.00 Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 807,926 13.64 355,336 6.00 503,393 8.50 473,782 8.00 1st Source Bank 729,541 12.31 355,642 6.00 503,826 8.50 474,189 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): 1st Source Corporation 743,467 12.55 266,502 4.50 414,559 7.00 384,948 6.50 1st Source Bank 722,082 12.18 266,731 4.50 414,915 7.00 385,279 6.50 Tier 1 Capital (to Average Assets): 1st Source Corporation 807,926 12.19 265,122 4.00 N/A N/A 331,402 5.00 1st Source Bank 729,541 11.03 264,500 4.00 N/A N/A 330,625 5.00

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2020 and 2019. (Dollars in thousands) Fair value carrying amount Aggregate unpaid principal Excess of fair value carrying amount over (under) unpaid principal December 31, 2020 Mortgages held for sale reported at fair value: Total Loans $ 12,885 $ 11,045 $ 1,840 (1) December 31, 2019 Mortgages held for sale reported at fair value: Total Loans $ 20,277 $ 19,890 $ 387 (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, 2020 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 80,285 $ 539,197 $ — $ 619,482 U.S. States and political subdivisions securities — 78,975 2,152 81,127 Mortgage-backed securities - Federal agencies — 453,789 — 453,789 Corporate debt securities — 42,369 — 42,369 Foreign government securities — 700 — 700 Total debt securities available-for-sale 80,285 1,115,030 2,152 1,197,467 Mortgages held for sale — 12,885 — 12,885 Accrued income and other assets (interest rate swap agreements) — 46,654 — 46,654 Total $ 80,285 $ 1,174,569 $ 2,152 $ 1,257,006 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 47,681 $ — $ 47,681 Total $ — $ 47,681 $ — $ 47,681 December 31, 2019 Assets: Investment securities available-for-sale: U.S. Treasury and Federal agencies securities $ 80,393 $ 446,571 $ — $ 526,964 U.S. States and political subdivisions securities — 82,213 2,292 84,505 Mortgage-backed securities - Federal agencies — 375,389 — 375,389 Corporate debt securities — 53,025 — 53,025 Foreign government securities — 700 — 700 Total debt securities available-for-sale 80,393 957,898 2,292 1,040,583 Mortgages held for sale — 20,277 — 20,277 Accrued income and other assets (interest rate swap agreements) — 21,975 — 21,975 Total $ 80,393 $ 1,000,150 $ 2,292 $ 1,082,835 Liabilities: Accrued expenses and other liabilities (interest rate swap agreements) $ — $ 22,352 $ — $ 22,352 Total $ — $ 22,352 $ — $ 22,352
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, 2020 $ 2,292 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income 58 Purchases 3,100 Issuances — Sales — Settlements — Maturities (3,298) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2020 $ 2,152 Beginning balance January 1, 2019 $ 1,025 Total gains or losses (realized/unrealized): Included in earnings — Included in other comprehensive income (35) Purchases 5,600 Issuances — Sales — Settlements — Maturities (4,298) Transfers into Level 3 — Transfers out of Level 3 — Ending balance December 31, 2019 $ 2,292
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, 2020 Collateral-dependent impaired loans $ — $ — $ 11,991 $ 11,991 Accrued income and other assets (mortgage servicing rights) — — 3,804 3,804 Accrued income and other assets (repossessions) — — 1,976 1,976 Accrued income and other assets (other real estate) — — 359 359 Total $ — $ — $ 18,130 $ 18,130 December 31, 2019 Collateral-dependent impaired loans $ — $ — $ 8,492 $ 8,492 Accrued income and other assets (mortgage servicing rights) — — 4,200 4,200 Accrued income and other assets (repossessions) — — 8,623 8,623 Accrued income and other assets (other real estate) — — 522 522 Total $ — $ — $ 21,837 $ 21,837
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, 2020 Assets: Cash and due from banks $ 74,186 $ 74,186 $ 74,186 $ — $ — Federal funds sold and interest bearing deposits with other banks 168,861 168,861 168,861 — — Investment securities, available-for-sale 1,197,467 1,197,467 80,285 1,115,030 2,152 Other investments 27,429 27,429 27,429 — — Mortgages held for sale 12,885 12,885 — 12,885 — Loans and leases, net of allowance for loan and lease losses 5,348,647 5,417,396 — — 5,417,396 Mortgage servicing rights 3,804 4,038 — — 4,038 Accrued interest receivable 20,242 20,242 — 20,242 — Interest rate swaps 46,654 46,654 — 46,654 — Liabilities: Deposits $ 5,946,028 $ 5,955,545 $ 4,778,671 $ 1,176,874 $ — Short-term borrowings 150,641 150,641 143,730 6,911 — Long-term debt and mandatorily redeemable securities 81,864 82,965 — 82,965 — Subordinated notes 58,764 58,560 — 58,560 — Accrued interest payable 3,996 3,996 — 3,996 — Interest rate swaps 47,681 47,681 — 47,681 — Off-balance-sheet instruments * — 321 — 321 — December 31, 2019 Assets: Cash and due from banks $ 67,215 $ 67,215 $ 67,215 $ — $ — Federal funds sold and interest bearing deposits with other banks 16,150 16,150 16,150 — — Investment securities, available-for-sale 1,040,583 1,040,583 80,393 957,898 2,292 Other investments 28,414 28,414 28,414 — — Mortgages held for sale 20,277 20,277 — 20,277 — Loans and leases, net of allowance for loan and lease losses 4,974,273 4,992,684 — — 4,992,684 Mortgage servicing rights 4,200 5,986 — — 5,986 Accrued interest receivable 19,125 19,125 — 19,125 — Interest rate swaps 21,975 21,975 — 21,975 — Liabilities: Deposits $ 5,357,326 $ 5,362,633 $ 3,708,828 $ 1,653,805 $ — Short-term borrowings 145,893 145,893 120,891 25,002 — Long-term debt and mandatorily redeemable securities 71,639 71,084 — 71,084 — Subordinated notes 58,764 61,469 — 61,469 — Accrued interest payable 13,918 13,918 — 13,918 — Interest rate swaps 22,352 22,352 — 22,352 — Off-balance-sheet instruments * — 281 — 281 — * 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, 2020 Debt securities available-for-sale Direct placement municipal securities $ 2,152 Discounted cash flows Credit spread assumption 0.04% - 2.30% 1.55 % December 31, 2019 Debt securities available-for-sale Direct placement municipal securities $ 2,292 Discounted cash flows Credit spread assumption 0.12% - 2.85%
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, 2020 Collateral-dependent impaired loans $ 11,991 $ 11,991 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 0% - 100% 43.7 % Mortgage servicing rights 3,804 4,038 Discounted cash flows Constant prepayment rate (CPR) 16.2% - 30.5% 22.8 % Discount rate 8.3% - 11.1% 8.5 % Repossessions 1,976 2,144 Appraisals, trade publications and auction values Discount for lack of marketability 0% - 16% 8 % Other real estate 359 388 Appraisals Discount for lack of marketability 6% - 13% 7 % December 31, 2019 Collateral-dependent impaired loans $ 8,492 $ 8,492 Collateral based measurements including appraisals, trade publications, and auction values Discount for lack of marketability and current conditions 0% - 90% Mortgage servicing rights 4,200 5,986 Discounted cash flows Constant prepayment rate (CPR) 10.2% - 28.1% Discount rate 9.3% - 12.1% Repossessions 8,623 9,211 Appraisals, trade publications and auction values Discount for lack of marketability 3% - 25% Other real estate 522 564 Appraisals Discount for lack of marketability 0% - 11%

1st Source Corporation (Paren_2

1st Source Corporation (Parent Company Only) Financial Information (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Schedule of statements of financial condition	STATEMENTS OF FINANCIAL CONDITION December 31 (Dollars in thousands) 2020 2019 ASSETS Cash and cash equivalents $ 113,242 $ 107,285 Short-term investments with bank subsidiary 500 500 Investments in: Bank subsidiaries 858,993 806,192 Non-bank subsidiaries 1 1 Right of use assets 17,452 17,106 Other assets 5,251 4,442 Total assets $ 995,439 $ 935,526 LIABILITIES AND SHAREHOLDERS’ EQUITY Commercial paper $ 4,767 $ 3,993 Long-term debt and mandatorily redeemable securities 26,681 25,819 Subordinated notes 58,764 58,764 Operating lease liability 17,369 17,329 Other liabilities 1,013 1,344 Total liabilities 108,594 107,249 Total shareholders’ equity 886,845 828,277 Total liabilities and shareholders’ equity $ 995,439 $ 935,526
Schedule of statements of income	STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Year Ended December 31 (Dollars in thousands) 2020 2019 2018 Income: Dividends from bank subsidiary $ 46,207 $ 46,735 $ 45,080 Rental (reimbursements to) income from subsidiaries (908) 2,505 2,613 Other 293 366 367 Investment securities and other investment (losses) gains (44) 109 (180) Total income 45,548 49,715 47,880 Expenses: Interest on subordinated notes 3,367 3,677 3,625 Interest on long-term debt and mandatorily redeemable securities 2,151 2,228 1,624 Interest on commercial paper and other short-term borrowings 11 13 14 Occupancy 1,816 1,861 1,774 Other 667 586 642 Total expenses 8,012 8,365 7,679 Income before income tax benefit and equity in undistributed income of subsidiaries 37,536 41,350 40,201 Income tax benefit 1,747 987 1,009 Income before equity in undistributed income of subsidiaries 39,283 42,337 41,210 Equity in undistributed income of subsidiaries: Bank subsidiaries 42,178 49,678 41,204 Net income $ 81,461 $ 92,015 $ 82,414 Comprehensive income $ 94,660 $ 107,863 $ 75,788
Schedule of statements of cash flow	STATEMENTS OF CASH FLOWS Year Ended December 31 (Dollars in thousands) 2020 2019 2018 Operating activities: Net income $ 81,461 $ 92,015 $ 82,414 Adjustments to reconcile net income to net cash provided by operating activities: Equity (undistributed) distributed in excess of income of subsidiaries (42,178) (49,678) (41,204) Depreciation of premises and equipment 2 2 2 Amortization of right of use assets 1,107 1,350 — Stock-based compensation 94 78 71 Realized/unrealized investment securities and other investment losses (gains) 44 (109) 180 Other (103) 533 45 Net change in operating activities 40,427 44,191 41,508 Investing activities: Net change in partnership investments (182) (260) (980) Capital contribution to subsidiary — (325) — Net change in investing activities (182) (585) (980) Financing activities: Net change in commercial paper 774 (332) (1,790) Proceeds from issuance of long-term debt and mandatorily redeemable securities 1,640 1,611 1,867 Payments on long-term debt and mandatorily redeemable securities (2,268) (2,068) (1,064) Stock issued under stock purchase plans 39 49 145 Net proceeds from issuance of treasury stock 1,706 1,878 1,763 Acquisition of treasury stock (6,415) (15,085) (9,271) Cash dividends paid on common stock (29,764) (29,021) (25,686) Net change in financing activities (34,288) (42,968) (34,036) Net change in cash and cash equivalents 5,957 638 6,492 Cash and cash equivalents, beginning of year 107,285 106,647 100,155 Cash and cash equivalents, end of year $ 113,242 $ 107,285 $ 106,647

Accounting Policies (Details)

Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2020USD ($)classsegmentunitRate	Dec. 31, 2019USD ($)
Securities
Held-to-maturity investment securities	$ 0	$ 0
Loans and leases
COVID-19 related loan and lease modifications	$ 129,000,000
Percentage of the principal balance that may be repurchased of a delinquent Ginnie Mae (GNMA) mortgage loan (as a percent)	100.00%
Allowance for credit losses
Number of segments within the loan and lease portfolio with similar risk characteristics | class	8
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	$ 360,000	520,000
Repossessed assets
Repossessed assets value	$ 1,980,000	8,620,000
Goodwill and intangibles
Number of reportable units used in goodwill allocation | unit	2
Goodwill impairment	$ 0
Partnership investment
Minimum percentage of partnership accounted for as equity investment | Rate	3.00%
Investment in partnership	$ 76,350,000	61,080,000
Segment reporting
Number of business segments aggregated as reportable operating segments | segment	1
Residential real estate portfolio
Loans and leases
Loans available for repurchase	$ 2,310,000	$ 1,440,000
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	90.00%
Premises and equipment
Useful life of premises and equipment	3 years
Income taxes
Tax benefit realized on settlement, percentage	50.00%
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

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Item Effected
Cumulative effect adjustment to retained earnings	$ 930,670	$ 848,636	$ 763,590	$ 718,537
Financing Receivable, Allowance for Credit Loss	140,654	111,254	100,469	94,883
Unfunded loan commitments		3,172
Allowance for credit losses including off-balance sheet credit loss liability		114,426
Commercial and agricultural
Item Effected
Financing Receivable, Allowance for Credit Loss	22,229	23,671	17,063	16,228
Auto and light truck
Item Effected
Financing Receivable, Allowance for Credit Loss	28,926	14,400	14,689	10,103
Medium and heavy duty truck
Item Effected
Financing Receivable, Allowance for Credit Loss	6,400	4,612	4,303	4,844
Aircraft
Item Effected
Financing Receivable, Allowance for Credit Loss		31,058
Construction equipment
Item Effected
Financing Receivable, Allowance for Credit Loss	19,166	14,120	10,922	9,343
Commercial real estate
Item Effected
Financing Receivable, Allowance for Credit Loss	22,758	18,350	15,705	14,792
Residential real estate and home equity
Item Effected
Financing Receivable, Allowance for Credit Loss	5,374	3,609	3,425	3,666
Consumer
Item Effected
Financing Receivable, Allowance for Credit Loss	1,748	1,434	1,315	1,288
Retained Earnings
Item Effected
Cumulative effect adjustment to retained earnings	$ 514,176	463,269	398,980	339,959
Cumulative Effect, Period of Adoption, Adjustment [Member]
Item Effected
Cumulative effect adjustment to retained earnings		(2,552)	(301)	0
Financing Receivable, Allowance for Credit Loss		2,584
Unfunded loan commitments		777
Allowance for credit losses including off-balance sheet credit loss liability		3,361
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial and agricultural
Item Effected
Financing Receivable, Allowance for Credit Loss		(655)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Auto and light truck
Item Effected
Financing Receivable, Allowance for Credit Loss		(1,303)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Medium and heavy duty truck
Item Effected
Financing Receivable, Allowance for Credit Loss		2,414
Cumulative Effect, Period of Adoption, Adjustment [Member] | Aircraft
Item Effected
Financing Receivable, Allowance for Credit Loss		484
Cumulative Effect, Period of Adoption, Adjustment [Member] | Construction equipment
Item Effected
Financing Receivable, Allowance for Credit Loss		372
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial real estate
Item Effected
Financing Receivable, Allowance for Credit Loss		(649)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Residential real estate and home equity
Item Effected
Financing Receivable, Allowance for Credit Loss		1,688
Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer
Item Effected
Financing Receivable, Allowance for Credit Loss		233
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings
Item Effected
Cumulative effect adjustment to retained earnings		(2,552)	(301)	718
Net deferred tax amount of cumulative effect adjustment to retained earnings		810
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Item Effected
Cumulative effect adjustment to retained earnings		846,084	763,289	718,537
Financing Receivable, Allowance for Credit Loss		113,838
Unfunded loan commitments		3,949
Allowance for credit losses including off-balance sheet credit loss liability		117,787
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Commercial and agricultural
Item Effected
Financing Receivable, Allowance for Credit Loss		23,016
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Auto and light truck
Item Effected
Financing Receivable, Allowance for Credit Loss		13,097
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Medium and heavy duty truck
Item Effected
Financing Receivable, Allowance for Credit Loss		7,026
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Aircraft
Item Effected
Financing Receivable, Allowance for Credit Loss		31,542
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Construction equipment
Item Effected
Financing Receivable, Allowance for Credit Loss		14,492
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Commercial real estate
Item Effected
Financing Receivable, Allowance for Credit Loss		17,701
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Residential real estate and home equity
Item Effected
Financing Receivable, Allowance for Credit Loss		5,297
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Consumer
Item Effected
Financing Receivable, Allowance for Credit Loss		1,667
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Retained Earnings
Item Effected
Cumulative effect adjustment to retained earnings		$ 460,717	$ 398,679	$ 340,677

Investment Securities Availab_3

Investment Securities Available-For-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Due in one year or less	$ 115,555
Due after one year through five years	525,017
Due after five years through ten years	89,368
Due after ten years	580
Mortgage-backed securities	442,748
Total debt securities available-for-sale	1,173,268	$ 1,033,771
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Due in one year or less	116,556
Due after one year through five years	537,183
Due after five years through ten years	89,359
Due after ten years	580
Mortgage-backed securities	453,789
Total debt securities available-for-sale	1,197,467	1,040,583
Accrued interest receivable on investment securities available-for-sale	3,840	4,240
U.S. Treasury and Federal agencies securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Total debt securities available-for-sale	610,195	524,896
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	619,482	526,964
U.S. States and political subdivisions securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Total debt securities available-for-sale	78,812	83,566
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	81,127	84,505
Mortgage-backed securities - Federal agencies
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Total debt securities available-for-sale	442,748	372,458
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	453,789	375,389
Corporate debt securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Total debt securities available-for-sale	40,813	52,151
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	42,369	53,025
Foreign government and other securities
Contractual maturities of investments in debt securities available-for-sale, Amortized Cost
Total debt securities available-for-sale	700	700
Contractual maturities of investments in debt securities available-for-sale, Fair Value
Total debt securities available-for-sale	$ 700	$ 700

Investment Securities Availab_4

Investment Securities Available-For-Sale (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	$ 1,173,268	$ 1,033,771
Gross Unrealized Gains	24,660	8,424
Gross Unrealized Losses	(461)	(1,612)
Investment securities available-for-sale	1,197,467	1,040,583
Fair Value
Less than 12 Months	210,861	178,586
12 Months or Longer	3,473	129,351
Total fair value	214,334	307,937
Unrealized Losses
Less than 12 Months	(451)	(661)
12 Months or Longer	(10)	(951)
Total unrealized losses	(461)	(1,612)
Gross realized gains and losses
Gross realized gains	285	0	$ 2
Gross realized losses	(6)	0	(347)
Net realized (losses) gains	279	0	$ (345)
Investment securities pledged as collateral	$ 338,680	281,380
Number of available-for-sale debt securities	623
Number of available-for-sale debt securities in an unrealized loss position	54
U.S. Treasury and Federal agencies securities
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	$ 610,195	524,896
Gross Unrealized Gains	9,521	2,538
Gross Unrealized Losses	(234)	(470)
Investment securities available-for-sale	619,482	526,964
Fair Value
Less than 12 Months	136,534	87,352
12 Months or Longer	0	69,053
Total fair value	136,534	156,405
Unrealized Losses
Less than 12 Months	(234)	(171)
12 Months or Longer	0	(299)
Total unrealized losses	(234)	(470)
U.S. States and political subdivisions securities
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	78,812	83,566
Gross Unrealized Gains	2,346	1,048
Gross Unrealized Losses	(31)	(109)
Investment securities available-for-sale	81,127	84,505
Fair Value
Less than 12 Months	6,391	9,283
12 Months or Longer	199	1,042
Total fair value	6,590	10,325
Unrealized Losses
Less than 12 Months	(30)	(107)
12 Months or Longer	(1)	(2)
Total unrealized losses	(31)	(109)
Mortgage-backed securities - Federal agencies
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	442,748	372,458
Gross Unrealized Gains	11,237	3,948
Gross Unrealized Losses	(196)	(1,017)
Investment securities available-for-sale	453,789	375,389
Fair Value
Less than 12 Months	67,736	81,951
12 Months or Longer	3,274	51,165
Total fair value	71,010	133,116
Unrealized Losses
Less than 12 Months	(187)	(383)
12 Months or Longer	(9)	(634)
Total unrealized losses	(196)	(1,017)
Corporate debt securities
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	40,813	52,151
Gross Unrealized Gains	1,556	890
Gross Unrealized Losses	0	(16)
Investment securities available-for-sale	42,369	53,025
Fair Value
Less than 12 Months	0	0
12 Months or Longer	0	8,091
Total fair value	0	8,091
Unrealized Losses
Less than 12 Months	0	0
12 Months or Longer	0	(16)
Total unrealized losses	0	(16)
Foreign government and other securities
Schedule Of Available For Sale Debt Securities [Line Items]
Total debt securities available-for-sale	700	700
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Investment securities available-for-sale	700	700
Fair Value
Less than 12 Months	200	0
12 Months or Longer	0	0
Total fair value	200	0
Unrealized Losses
Less than 12 Months	0	0
12 Months or Longer	0	0
Total unrealized losses	$ 0	$ 0

Loan and Lease Financings (Deta

Loan and Lease Financings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Total loans and leases	$ 5,489,301	$ 5,085,527
Deferred loan and lease costs	(3,730)	5,060
PPP loans receivable deferred income	6,370
Accrued interest receivable on loans and leases	16,390	14,810
Loans to certain directors, executive officers, and principal shareholders of equity securities of the entity and to their affiliates
Loan to related parties	26,510	$ 17,080
New loans and other additions to related parties	11,910
Repayments and other reductions of loan given to related parties	2,480
PPP loan originations	597,450
PPP loan balance	$ 351,560

Loan and Lease Financings (De_2

Loan and Lease Financings (Details 2)	12 Months Ended
	Dec. 31, 2020USD ($)methodclass	Dec. 31, 2019USD ($)
Receivables [Abstract]
Number of methods to assess credit risk | method	2
Loan and Lease Financings
Amortized cost of loans and leases	$ 5,489,301,000	$ 5,085,527,000
Number of domestic aircraft loan pools | class	2
Commercial and agricultural
Loan and Lease Financings
2020	$ 673,693,000
2019	195,254,000
2018	139,137,000
2017	96,423,000
2016	27,234,000
Prior	21,924,000
Revolving Loans	325,057,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	$ 1,478,722,000	1,132,791,000
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
Auto and light truck
Loan and Lease Financings
2020	$ 268,045,000
2019	168,977,000
2018	65,545,000
2017	32,713,000
2016	6,460,000
Prior	629,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	$ 542,369,000	588,807,000
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
2020	$ 92,698,000
2019	89,292,000
2018	44,205,000
2017	31,773,000
2016	16,276,000
Prior	4,928,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	$ 279,172,000	294,824,000
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
2020	$ 440,802,000
2019	155,919,000
2018	93,521,000
2017	96,053,000
2016	46,159,000
Prior	22,636,000
Revolving Loans	6,370,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	$ 861,460,000
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
2020	$ 328,692,000
2019	194,293,000
2018	106,962,000
2017	43,111,000
2016	12,861,000
Prior	5,807,000
Revolving Loans	20,490,000
Revolving Loans Converted to Term	2,672,000
Amortized cost of loans and leases	714,888,000	705,451,000
Commercial real estate
Loan and Lease Financings
2020	200,243,000
2019	212,467,000
2018	179,020,000
2017	181,693,000
2016	70,784,000
Prior	125,284,000
Revolving Loans	373,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	969,864,000	908,177,000
Residential real estate and home equity
Loan and Lease Financings
2020	133,829,000
2019	65,690,000
2018	18,215,000
2017	22,943,000
2016	41,847,000
Prior	87,541,000
Revolving Loans	135,502,000
Revolving Loans Converted to Term	5,812,000
Amortized cost of loans and leases	511,379,000	532,003,000
Consumer
Loan and Lease Financings
2020	43,826,000
2019	34,508,000
2018	18,982,000
2017	7,041,000
2016	2,267,000
Prior	795,000
Revolving Loans	24,028,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	131,447,000	$ 139,434,000
Credit Quality Grades 1-6 | Commercial and agricultural
Loan and Lease Financings
2020	666,905,000
2019	193,555,000
2018	134,411,000
2017	92,916,000
2016	26,034,000
Prior	19,790,000
Revolving Loans	291,990,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	1,425,601,000
Credit Quality Grades 1-6 | Auto and light truck
Loan and Lease Financings
2020	248,932,000
2019	141,841,000
2018	52,749,000
2017	24,101,000
2016	4,210,000
Prior	608,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	472,441,000
Credit Quality Grades 1-6 | Medium and heavy duty truck
Loan and Lease Financings
2020	92,698,000
2019	88,314,000
2018	44,205,000
2017	31,773,000
2016	15,644,000
Prior	4,840,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	277,474,000
Credit Quality Grades 1-6 | Aircraft
Loan and Lease Financings
2020	429,283,000
2019	153,358,000
2018	93,042,000
2017	95,457,000
2016	43,972,000
Prior	20,966,000
Revolving Loans	6,370,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	842,448,000
Credit Quality Grades 1-6 | Construction equipment
Loan and Lease Financings
2020	311,174,000
2019	180,550,000
2018	96,320,000
2017	42,713,000
2016	12,624,000
Prior	5,722,000
Revolving Loans	17,502,000
Revolving Loans Converted to Term	737,000
Amortized cost of loans and leases	667,342,000
Credit Quality Grades 1-6 | Commercial real estate
Loan and Lease Financings
2020	190,725,000
2019	204,477,000
2018	173,847,000
2017	175,009,000
2016	69,022,000
Prior	122,762,000
Revolving Loans	373,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	936,215,000
Credit Quality Grades 7-12
Loan and Lease Financings
Threshold value of loan or lease for evaluation of the appropriateness of the impairment reserve	100,000
Credit Quality Grades 7-12 | Commercial and agricultural
Loan and Lease Financings
2020	6,788,000
2019	1,699,000
2018	4,726,000
2017	3,507,000
2016	1,200,000
Prior	2,134,000
Revolving Loans	33,067,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	53,121,000
Credit Quality Grades 7-12 | Auto and light truck
Loan and Lease Financings
2020	19,113,000
2019	27,136,000
2018	12,796,000
2017	8,612,000
2016	2,250,000
Prior	21,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	69,928,000
Credit Quality Grades 7-12 | Medium and heavy duty truck
Loan and Lease Financings
2020	0
2019	978,000
2018	0
2017	0
2016	632,000
Prior	88,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	1,698,000
Credit Quality Grades 7-12 | Aircraft
Loan and Lease Financings
2020	11,519,000
2019	2,561,000
2018	479,000
2017	596,000
2016	2,187,000
Prior	1,670,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	19,012,000
Credit Quality Grades 7-12 | Construction equipment
Loan and Lease Financings
2020	17,518,000
2019	13,743,000
2018	10,642,000
2017	398,000
2016	237,000
Prior	85,000
Revolving Loans	2,988,000
Revolving Loans Converted to Term	1,935,000
Amortized cost of loans and leases	47,546,000
Credit Quality Grades 7-12 | Commercial real estate
Loan and Lease Financings
2020	9,518,000
2019	7,990,000
2018	5,173,000
2017	6,684,000
2016	1,762,000
Prior	2,522,000
Revolving Loans	0
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	33,649,000
Performing | Residential real estate and home equity
Loan and Lease Financings
2020	133,829,000
2019	65,690,000
2018	18,194,000
2017	22,929,000
2016	41,847,000
Prior	86,106,000
Revolving Loans	135,255,000
Revolving Loans Converted to Term	5,703,000
Amortized cost of loans and leases	509,553,000
Performing | Consumer
Loan and Lease Financings
2020	43,824,000
2019	34,409,000
2018	18,904,000
2017	7,005,000
2016	2,259,000
Prior	793,000
Revolving Loans	23,869,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	131,063,000
Nonperforming | Residential real estate and home equity
Loan and Lease Financings
2020	0
2019	0
2018	21,000
2017	14,000
2016	0
Prior	1,435,000
Revolving Loans	247,000
Revolving Loans Converted to Term	109,000
Amortized cost of loans and leases	1,826,000
Nonperforming | Consumer
Loan and Lease Financings
2020	2,000
2019	99,000
2018	78,000
2017	36,000
2016	8,000
Prior	2,000
Revolving Loans	159,000
Revolving Loans Converted to Term	0
Amortized cost of loans and leases	$ 384,000

Loan and Lease Financings (De_3

Loan and Lease Financings (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	$ 5,424,982	$ 5,060,613
90 Days or More Past Due and Accruing	115	311
Total Accruing Loans	5,428,913	5,075,738
Nonaccrual	60,388	9,789
Total loans and leases	5,489,301	5,085,527
Increase in interest income	3,490	690	$ 2,180
Commercial and agricultural
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	1,472,755	1,131,704
Total Accruing Loans	1,472,789	1,131,822
Nonaccrual	5,933	969
Total loans and leases	1,478,722	1,132,791
Auto and light truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	504,659	586,212
Total Accruing Loans	505,424	587,557
Nonaccrual	36,945	1,250
Total loans and leases	542,369	588,807
Medium and heavy duty truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	278,452	293,736
Total Accruing Loans	278,452	293,750
Nonaccrual	720	1,074
Total loans and leases	279,172	294,824
Aircraft
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	860,632	772,846
Total Accruing Loans	860,632	783,165
Nonaccrual	828	875
Total loans and leases	861,460	784,040
Construction equipment
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	701,124	702,671
Total Accruing Loans	702,515	704,099
Nonaccrual	12,373	1,352
Total loans and leases	714,888	705,451
Commercial real estate
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	968,370	906,468
Total Accruing Loans	968,370	906,526
Nonaccrual	1,494	1,651
Total loans and leases	969,864	908,177
Residential real estate and home equity
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	508,532	528,844
90 Days or More Past Due and Accruing	108	257
Total Accruing Loans	509,661	529,814
Nonaccrual	1,718	2,189
Total loans and leases	511,379	532,003
Consumer
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Current	130,458	138,132
90 Days or More Past Due and Accruing	7	54
Total Accruing Loans	131,070	139,005
Nonaccrual	377	429
Total loans and leases	131,447	139,434
30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	2,973	10,496
30 to 59 Days Past Due | Commercial and agricultural
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	34	118
30 to 59 Days Past Due | Auto and light truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	560	1,268
30 to 59 Days Past Due | Medium and heavy duty truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	14
30 to 59 Days Past Due | Aircraft
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	7,026
30 to 59 Days Past Due | Construction equipment
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	1,093	819
30 to 59 Days Past Due | Commercial real estate
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	58
30 to 59 Days Past Due | Residential real estate and home equity
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	782	561
30 to 59 Days Past Due | Consumer
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	504	632
60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	843	4,318
60 to 89 Days Past Due | Commercial and agricultural
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	0
60 to 89 Days Past Due | Auto and light truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	205	77
60 to 89 Days Past Due | Medium and heavy duty truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	0
60 to 89 Days Past Due | Aircraft
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	3,293
60 to 89 Days Past Due | Construction equipment
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	298	609
60 to 89 Days Past Due | Commercial real estate
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	0	0
60 to 89 Days Past Due | Residential real estate and home equity
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	239	152
60 to 89 Days Past Due | Consumer
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Past Due	$ 101	$ 187

Loan and Lease Financings (De_4

Loan and Lease Financings (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Impaired loans and leases
Recorded Investment, With no related allowance recorded	$ 5,122
Unpaid Principal Balance, With no related allowance recorded	5,122
Recorded Investment, With an allowance recorded	11,717
Unpaid Principal Balance, With an allowance recorded	11,719
Total Recorded Investment	16,839
Total Unpaid Principal Balance	16,841
Total Related Allowance	3,225
Average Recorded Investment	15,076	$ 26,711
Interest Income	269	35
Commercial and agricultural
Impaired loans and leases
Recorded Investment, With no related allowance recorded	218
Unpaid Principal Balance, With no related allowance recorded	218
Recorded Investment, With an allowance recorded	10,366
Unpaid Principal Balance, With an allowance recorded	10,366
Total Related Allowance	3,003
Average Recorded Investment	5,983	2,812
Interest Income	242	0
Auto and light truck
Impaired loans and leases
Recorded Investment, With no related allowance recorded	853
Unpaid Principal Balance, With no related allowance recorded	853
Recorded Investment, With an allowance recorded	278
Unpaid Principal Balance, With an allowance recorded	278
Total Related Allowance	30
Average Recorded Investment	2,721	9,352
Interest Income	0	0
Medium and heavy duty truck
Impaired loans and leases
Recorded Investment, With no related allowance recorded	1,074
Unpaid Principal Balance, With no related allowance recorded	1,074
Recorded Investment, With an allowance recorded	0
Unpaid Principal Balance, With an allowance recorded	0
Total Related Allowance	0
Average Recorded Investment	244	247
Interest Income	0	0
Aircraft
Impaired loans and leases
Recorded Investment, With no related allowance recorded	875
Unpaid Principal Balance, With no related allowance recorded	875
Recorded Investment, With an allowance recorded	0
Unpaid Principal Balance, With an allowance recorded	0
Total Related Allowance	0
Average Recorded Investment	2,409	9,987
Interest Income	8	20
Construction equipment
Impaired loans and leases
Recorded Investment, With no related allowance recorded	615
Unpaid Principal Balance, With no related allowance recorded	615
Recorded Investment, With an allowance recorded	736
Unpaid Principal Balance, With an allowance recorded	736
Total Related Allowance	75
Average Recorded Investment	1,664	1,663
Interest Income	0	0
Commercial real estate
Impaired loans and leases
Recorded Investment, With no related allowance recorded	1,487
Unpaid Principal Balance, With no related allowance recorded	1,487
Recorded Investment, With an allowance recorded	0
Unpaid Principal Balance, With an allowance recorded	0
Total Related Allowance	0
Average Recorded Investment	1,715	2,303
Interest Income	0	0
Residential real estate and home equity
Impaired loans and leases
Recorded Investment, With no related allowance recorded	0
Unpaid Principal Balance, With no related allowance recorded	0
Recorded Investment, With an allowance recorded	337
Unpaid Principal Balance, With an allowance recorded	339
Total Related Allowance	117
Average Recorded Investment	340	347
Interest Income	19	15
Consumer
Impaired loans and leases
Recorded Investment, With no related allowance recorded	0
Unpaid Principal Balance, With no related allowance recorded	0
Recorded Investment, With an allowance recorded	0
Unpaid Principal Balance, With an allowance recorded	0
Total Related Allowance	0
Average Recorded Investment	0	0
Interest Income	$ 0	$ 0

Loan and Lease Financings (De_5

Loan and Lease Financings (Details 5) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)modificationdefault	Dec. 31, 2019USD ($)modificationdefault	Dec. 31, 2018USD ($)modificationdefault
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 11,486	$ 10,724
Financing Receivable, Modifications, Number of Contracts | modification	2	2	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,733	$ 10,366	$ 285
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default			0
Troubled debt restructured loans and leases which had payment defaults within twelve months following modification
Default threshold	90 days
Interest Rate Below Market Reduction
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts	2	1	0
Performing
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 330	$ 10,238
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 9,901	$ 0
Nonperforming
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 11,156	$ 486
Financing Receivable, Modifications, Number of Contracts | modification	2	1	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,733	$ 465	$ 285
Commercial and agricultural | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 9,901	$ 0
Commercial and agricultural | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 465	$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 410
Auto and light truck | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Auto and light truck | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 285
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default		1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 0
Medium and heavy duty truck | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Medium and heavy duty truck | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Aircraft | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Aircraft | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	1	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 828	$ 0	$ 0
Construction equipment | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Construction equipment | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	1	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 9,905	$ 0	$ 0
Commercial real estate | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Commercial real estate | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Residential real estate and home equity | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Residential real estate and home equity | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Consumer | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Consumer | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0

Allowance for Credit Losses (De

Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in allowance for loan and lease losses
Balance at the beginning of the period	$ 111,254	$ 100,469	$ 94,883
Charge-offs	13,974	7,591	17,112
Recoveries	4,789	2,543	3,236
Net charge-offs (recoveries)	9,185	5,048	13,876
Provision (recovery of provision)	36,001	15,833	19,462
Balance at the end of the period	140,654	111,254	100,469
Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	2,584
Balance at the end of the period		2,584
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	113,838
Balance at the end of the period		113,838
Commercial and agricultural
Changes in allowance for loan and lease losses
Balance at the beginning of the period	23,671	17,063	16,228
Charge-offs	903	1,040	229
Recoveries	663	664	222
Net charge-offs (recoveries)	240	376	7
Provision (recovery of provision)	(547)	6,984	842
Balance at the end of the period	22,229	23,671	17,063
Commercial and agricultural | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	(655)
Balance at the end of the period		(655)
Commercial and agricultural | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	23,016
Balance at the end of the period		23,016
Auto and light truck
Changes in allowance for loan and lease losses
Balance at the beginning of the period	14,400	14,689	10,103
Charge-offs	7,107	991	3,308
Recoveries	499	97	68
Net charge-offs (recoveries)	6,608	894	3,240
Provision (recovery of provision)	22,437	605	7,826
Balance at the end of the period	28,926	14,400	14,689
Auto and light truck | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	(1,303)
Balance at the end of the period		(1,303)
Auto and light truck | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	13,097
Balance at the end of the period		13,097
Medium and heavy duty truck
Changes in allowance for loan and lease losses
Balance at the beginning of the period	4,612	4,303	4,844
Charge-offs	15	1,132	23
Recoveries	18	32	0
Net charge-offs (recoveries)	(3)	1,100	23
Provision (recovery of provision)	(629)	1,409	(518)
Balance at the end of the period	6,400	4,612	4,303
Medium and heavy duty truck | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	2,414
Balance at the end of the period		2,414
Medium and heavy duty truck | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	7,026
Balance at the end of the period		7,026
Aircraft
Changes in allowance for loan and lease losses
Balance at the beginning of the period	31,058	33,047	34,619
Charge-offs	855	3,066	12,222
Recoveries	1,800	1,143	2,499
Net charge-offs (recoveries)	(945)	1,923	9,723
Provision (recovery of provision)	1,566	(66)	8,151
Balance at the end of the period	34,053	31,058	33,047
Aircraft | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	484
Balance at the end of the period		484
Aircraft | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	31,542
Balance at the end of the period		31,542
Construction equipment
Changes in allowance for loan and lease losses
Balance at the beginning of the period	14,120	10,922	9,343
Charge-offs	4,090	238	288
Recoveries	1,415	160	100
Net charge-offs (recoveries)	2,675	78	188
Provision (recovery of provision)	7,349	3,276	1,767
Balance at the end of the period	19,166	14,120	10,922
Construction equipment | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	372
Balance at the end of the period		372
Construction equipment | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	14,492
Balance at the end of the period		14,492
Commercial real estate
Changes in allowance for loan and lease losses
Balance at the beginning of the period	18,350	15,705	14,792
Charge-offs	37	5	70
Recoveries	58	75	53
Net charge-offs (recoveries)	(21)	(70)	17
Provision (recovery of provision)	5,036	2,575	930
Balance at the end of the period	22,758	18,350	15,705
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	(649)
Balance at the end of the period		(649)
Commercial real estate | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	17,701
Balance at the end of the period		17,701
Residential real estate and home equity
Changes in allowance for loan and lease losses
Balance at the beginning of the period	3,609	3,425	3,666
Charge-offs	74	53	63
Recoveries	33	85	23
Net charge-offs (recoveries)	41	(32)	40
Provision (recovery of provision)	118	152	(201)
Balance at the end of the period	5,374	3,609	3,425
Residential real estate and home equity | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	1,688
Balance at the end of the period		1,688
Residential real estate and home equity | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	5,297
Balance at the end of the period		5,297
Consumer
Changes in allowance for loan and lease losses
Balance at the beginning of the period	1,434	1,315	1,288
Charge-offs	893	1,066	909
Recoveries	303	287	271
Net charge-offs (recoveries)	590	779	638
Provision (recovery of provision)	671	898	665
Balance at the end of the period	1,748	1,434	$ 1,315
Consumer | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	233
Balance at the end of the period		233
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance at the beginning of the period	$ 1,667
Balance at the end of the period		$ 1,667

Allowance for Credit Losses (_2

Allowance for Credit Losses (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in allowance for loan and lease losses
Balance, beginning of year	$ 3,172
Balance, end of year		$ 3,172
Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance, beginning of year	777
Balance, end of year		777
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance, beginning of year	3,949
Balance, end of year		3,949
Unfunded Loan Commitment
Changes in allowance for loan and lease losses
Balance, beginning of year	3,172	3,075	$ 3,050
Provision (recovery of provision) on unfunded loan commitments	550	97	25
Balance, end of year	4,499	3,172	3,075
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in allowance for loan and lease losses
Balance, beginning of year	777	0	0
Balance, end of year		777	0
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Changes in allowance for loan and lease losses
Balance, beginning of year	$ 3,949	3,075	3,050
Balance, end of year		$ 3,949	$ 3,075

Lease Investments (Details)

Lease Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of the Components of Income from Direct Finance and Operating Lease Equipment [Line Items]
Interest income on lease receivable	$ 8,258	$ 10,985	$ 13,052
Income related to lease payments	23,380	30,741	31,793
Minimum lease payments	160,508	190,879
Estimated unguaranteed residual values	0	41
Less: unearned income	(21,507)	(30,568)
Net investment in direct finance lease financing	139,001	160,352
Gross investment in operating lease financing	116,818	176,485
Accumulated depreciation	(51,778)	(64,801)
Net investment in operating lease financings	65,040	111,684
Carrying amount of residual assets covered by residual value guarantees	43,650	69,090
Income from reimbursements for personal property tax payments on operating leased equipment	610	730
Expense for payments of personal property taxes on operating leased equipment	610	730
Leased equipment
Schedule of the Components of Income from Direct Finance and Operating Lease Equipment [Line Items]
Depreciation	$ 20,203	$ 25,128	$ 26,248

Lease Investments (Details 2)

Lease Investments (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Direct financing minimum lease payments receivable
2021	$ 34,123
2022	31,867
2023	29,791
2024	18,042
2025	14,822
Thereafter	31,863
Total	160,508	$ 190,879
Operating minimum lease payments receivable
2021	16,784
2022	12,995
2023	7,676
2024	3,859
2025	1,636
Thereafter	242
Total	43,192
Impairment charges on leased equipment	$ 680

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Premises and equipment
Total premises and equipment	$ 118,665,000	$ 116,561,000
Accumulated depreciation and amortization	(69,292,000)	(64,342,000)
Net premises and equipment	49,373,000	52,219,000
Long-lived asset impairment charges	0	0	$ 100,000
Depreciation and amortization of properties and equipment	5,673,000	5,786,000	$ 5,620,000
Land
Premises and equipment
Total premises and equipment	15,505,000	15,222,000
Buildings and improvements
Premises and equipment
Total premises and equipment	60,488,000	59,508,000
Furniture and equipment
Premises and equipment
Total premises and equipment	$ 42,672,000	$ 41,831,000

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Expected amortization expense on mortgage servicing rights
2021	$ 1,390
2022	1,020
2023	720
2024	490
2025	340
Residential mortgage loans
Mortgage Servicing Rights
Unpaid principal balance	$ 838,450	$ 740,910	$ 734,300

Mortgage Servicing Rights (De_2

Mortgage Servicing Rights (Details 2) - Residential mortgage loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in mortgage servicing rights
Balance at the beginning of the period	$ 4,200	$ 4,283
Additions	2,777	1,229
Amortization	(2,361)	(1,312)
Sales	0	0
Carrying value before valuation allowance at end of year	4,616	4,200	$ 4,283
Changes in valuation allowance
Balance at the beginning of the period	0	0
Impairment (charges) recoveries	(812)	0
Balance at the end of the period	(812)	0	0
Net carrying value of mortgage servicing rights at end of period	3,804	4,200
Fair value of mortgage servicing rights at end of period	4,038	5,986
Fair value of mortgage servicing rights exceeding the carrying value	230
Funds held in trust	17,780	16,770
Mortgage loan contractual servicing fees	$ 3,130	$ 2,640	$ 2,610

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 83,870	$ 83,870
Other intangible assets	80	100
Accumulated amortization on intangible assets	60	100
Intangible asset amortization	20	$ 30	$ 80
Expected amortization on other intangible assets
2021	20
2022	20
2023	20
2024	20
2025	$ 0

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill (Details 2) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Core deposit intangibles and other intangible assets
Less: accumulated amortization	$ (60)	$ (100)
Net carrying amount	80	100
Other intangibles
Core deposit intangibles and other intangible assets
Gross carrying amount	146	204
Less: accumulated amortization	(64)	(100)
Net carrying amount	$ 82	$ 104

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amount of certificates of deposit and other time deposits of $250,000 or more outstanding
Under 3 months	$ 117,444
4-6 months	83,262
7-12 months	80,237
Over 12 months	172,214
Total	453,157	$ 749,440
Maturities of time deposits, including both private and public funds
2021	834,723
2022	170,270
2023	108,353
2024	41,353
2025	7,789
Thereafter	4,869
Total	$ 1,167,357	$ 1,648,498

Borrowed Funds and Mandatoril_3

Borrowed Funds and Mandatorily Redeemable Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)note	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Borrowed funds and mandatorily redeemable securities
Total long-term debt and mandatorily redeemable securities	$ 81,864	$ 71,639
Annual maturities of long-term debt
2021	3,168
2022	4,830
2023	2,049
2024	11,187
2025	145
Thereafter	60,485
Mandatorily redeemable securities
Interest expense	2,140	2,220	$ 1,610
Securities subject to mandatory redemption
Borrowed funds and mandatorily redeemable securities
Mandatorily redeemable securities	20,358	17,972
Federal Home Loan Bank borrowings
Borrowed funds and mandatorily redeemable securities
Long-term debt	$ 55,183	45,819
Annual maturities of long-term debt
Number of Federal Home Loan Bank borrowings, fixed rate notes | note	18
Collateral security	$ 68,950
Other long-term debt
Borrowed funds and mandatorily redeemable securities
Long-term debt	$ 6,323	$ 7,848
Minimum | Federal Home Loan Bank borrowings
Borrowed funds and mandatorily redeemable securities
Interest rate on Federal Home Loan Bank borrowings (as a percent)	0.54%
Maximum | Federal Home Loan Bank borrowings
Borrowed funds and mandatorily redeemable securities
Interest rate on Federal Home Loan Bank borrowings (as a percent)	5.04%

Borrowed Funds and Mandatoril_4

Borrowed Funds and Mandatorily Redeemable Securities (Details 2) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Short-term borrowings:
Short-term borrowings	$ 150,641	$ 145,893
Short-term borrowings, weighted average interest rate	0.08%	0.42%
Federal funds purchased
Short-term borrowings:
Short-term borrowings	$ 0	$ 0
Short-term borrowings, weighted average interest rate	0.00%	0.00%
Security repurchase agreements
Short-term borrowings:
Short-term borrowings	$ 143,564	$ 120,459
Short-term borrowings, weighted average interest rate	0.08%	0.23%
Commercial paper
Short-term borrowings:
Short-term borrowings	$ 4,766	$ 3,993
Short-term borrowings, weighted average interest rate	0.13%	0.29%
Federal Home Loan Bank advances
Short-term borrowings:
Short-term borrowings	$ 0	$ 20,000
Short-term borrowings, weighted average interest rate	0.00%	1.61%
Other short-term borrowings
Short-term borrowings:
Short-term borrowings	$ 2,311	$ 1,441
Short-term borrowings, weighted average interest rate	0.00%	0.00%

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subordinated notes
Federal tax credits recognized in tax expense	$ 1,720	$ 1,550	$ 1,290
Investment tax credits	31,080	15,860	$ 10,450
Investment carrying amount	7,316,411	6,622,776
Unfunded capital and other commitments	6,385,741	5,774,140
Unconsolidated maximum exposure to loss	52,106	37,904
Variable interest entity, primary beneficiary
Subordinated notes
Investment carrying amount	53,610	41,240
Unfunded capital and other commitments	4,930	18,680
Variable interest entity, not primary beneficiary
Subordinated notes
Investment carrying amount	22,742	19,843
Unfunded capital and other commitments	$ 26,716	$ 17,420

Variable Interest Entities (D_2

Variable Interest Entities (Details 2) $ in Thousands		12 Months Ended
		Dec. 31, 2020USD ($)trust	Dec. 31, 2019USD ($)
Variable Interest Entities
Number of trusts sponsored | trust		1
Percentage of ownership interest		100.00%
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]	1.70%
Maturity date of subordinated notes		Sep. 15, 2037
London Interbank Offered Rate (LIBOR) | August 2007 issuance
Subordinated notes
Basis Spread on Variable Rate (as a percent)		1.48%
[1]	Fixed rate through life of debt.
[2]	3-Month LIBOR +1.48% through remaining life of debt.

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
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, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Distributed earnings allocated to common stock	$ 28,859	$ 28,188	$ 24,894
Undistributed earnings allocated to common stock	52,044	63,254	56,975
Net earnings allocated to common stock	80,903	91,442	81,869
Net earnings allocated to participating securities	534	518	545
Net income available to common shareholders	$ 81,437	$ 91,960	$ 82,414
Weighted average shares outstanding for basic earnings per common share	25,527,154	25,600,138	25,937,599
Dilutive effect of stock compensation (in shares)	0	0	0
Weighted average shares outstanding for diluted earnings per common share	25,527,154	25,600,138	25,937,599
Basic earnings per common share (in dollars per share)	$ 3.17	$ 3.57	$ 3.16
Diluted earnings per common share (in dollars per share)	$ 3.17	$ 3.57	$ 3.16

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on investment securities available-for-sale	$ 279	$ 0	$ (345)
Income before income taxes	106,341	120,154	105,027
Income tax expense	(24,880)	(28,139)	(22,613)
Net income	81,461	92,015	$ 82,414
Unrealized gains and losses on available-for-sale securities | Amount reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on investment securities available-for-sale	279	0
Income before income taxes	279	0
Income tax expense	(65)	0
Net income	$ 214	$ 0

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - Employee Stock Ownership and Profit Sharing Plan $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)hshares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)
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)	4.00%
Employer's matching contribution on the next 2% of employee contribution (as a percent)	50.00%
Employee contribution after matching contribution of employer (as a percent)	2.00%
Employee's eligible compensation on which employer pays fixed contribution (as a percent)	2.00%
Common stock held in relation to employee benefit plans (in shares) | shares	824,466	852,128
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)	100.00%
Contribution expense | $	$ 5,700	$ 5,480	$ 4,870

Stock Based Compensation (Detai

Stock Based Compensation (Details)	12 Months Ended
	Dec. 31, 2020USD ($)plan$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares
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 | $	$ 2,670,000	$ 3,350,000	$ 3,530,000
Shares Available for Grant
Balance at the beginning of the period (in shares)	664,502	675,059	676,444
Granted (in shares)	(147,576)	(74,336)	(74,981)
Forfeited (in shares)	49	1,241	3,135
Balance at the end of the period (in shares)	577,208	664,502	675,059
Stock award plans
Additional disclosures
Stock-based compensation expense | $	$ 3,290,000	$ 2,760,000	$ 3,550,000
Income tax benefit due to stock-based compensation expenses | $	770,000	$ 650,000	$ 860,000
Unrecognized stock-based compensation expense | $	$ 7,630,000
Weighted-average period for unrecognized compensation cost to recognize	3 years 5 months 8 days
Executive Incentive Plan
Shares Available for Grant
Shares authorized	60,233	62,538	70,461
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)	218,991	253,819	295,926
Granted (in shares)	147,576	74,336	74,981
Vested (in shares)	(74,203)	(100,299)	(106,513)
Forfeited (in shares)	(870)	(8,865)	(10,575)
Stock awards outstanding at the end of the period (in shares)	291,494	218,991	253,819
Weighted-Average Grant-Date Fair Value
Stock awards outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 29.60	$ 28.59	$ 27.41
Granted (in dollars per share) | $ / shares	37.41	31.44	29.11
Vested (in dollars per share) | $ / shares	28.95	28.35	25.79
Forfeited (in dollars per share) | $ / shares	31.82	30.28	27.51
Stock awards outstanding at the end of the period (in dollars per share) | $ / shares	$ 33.71	29.60	28.59
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)	25.00%
Maximum stock which can be purchased by employee per year | $	$ 25,000
Purchases price (in dollars per share) | $ / shares	$ 34.35	$ 43.81	$ 53.84
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)	1.78%	0.14%
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)			(0.09%)
ESPP offering through June 2021
Additional disclosures
Value of shares to be purchased | $	$ 304,635
Stock value of most recent offering (in dollars per share ) | $ / shares	$ 34.35

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	Dec. 22, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal		$ 42,411	$ 28,130	$ 20,167
State		6,629	5,739	2,996
Total current		49,040	33,869	23,163
Deferred:
Federal		(21,865)	(5,135)	(875)
State		(2,295)	(595)	1,200
Deferred tax liability remeasurement		0	0	(875)	$ 2,610
Total deferred		(24,160)	(5,730)	(550)
Total provision		$ 24,880	$ 28,139	$ 22,613
Statutory federal income tax (as a percent)	21.00%	21.00%	21.00%	21.00%	35.00%

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($)	Dec. 22, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reasons for the difference between income tax expense and statutory federal income tax
Statutory federal income tax		$ 22,332,000	$ 25,232,000	$ 22,056,000
Tax-exempt interest income		(439,000)	(552,000)	(650,000)
State taxes, net of federal income tax benefit		3,424,000	4,064,000	3,315,000
Deferred tax liability remeasurement		0	0	(875,000)	$ 2,610,000
Other		(437,000)	(605,000)	(1,233,000)
Total provision		$ 24,880,000	$ 28,139,000	$ 22,613,000
Reasons for the difference between income tax expense rate and statutory federal income tax rate
Statutory federal income tax (as a percent)	21.00%	21.00%	21.00%	21.00%	35.00%
Tax-exempt interest income (as a percent)		(0.40%)	(0.50%)	(0.60%)
State taxes, net of federal income tax benefit (as a percent)		3.20%	3.40%	3.20%
Deferred tax liability remeasurement (as a percent)		0.00%	0.00%	(0.80%)
Other (as a percent)		(0.40%)	(0.50%)	(1.30%)
Total income tax expense (benefit) (as a percent)		23.40%	23.40%	21.50%
Deferred tax assets:
Reserve for loan and lease losses		$ 35,696,000	$ 28,792,000
Deferred Tax Assets, Tax Credit Carryforwards, Other		8,606,000	0
Operating lease liability		5,704,000	5,899,000
Accruals for employee benefits		2,963,000	2,842,000
Capitalized loan costs		893,000	0
Mortgage servicing		173,000	0
Other		678,000	222,000
Total deferred tax assets		54,713,000	37,755,000
Deferred tax liabilities:
Differing depreciable bases in premises and leased equipment		13,118,000	18,614,000
Right of use assets - leases		5,737,000	5,899,000
Differing bases in assets related to acquisitions		4,160,000	4,092,000
Tax advantaged partnerships		3,770,000	4,383,000
Net unrealized gains on securities available-for-sale		5,827,000	1,640,000
Mortgage servicing		0	394,000
Capitalized loan costs		0	1,207,000
Prepaid expenses		334,000	297,000
Other		300,000	544,000
Total deferred tax liabilities		33,246,000	37,070,000
Deferred Tax Assets, Net, Total		21,467,000	685,000
Reconciliation of the beginning and ending amounts of unrecognized tax benefits
Balance, at beginning of the period		0	0	$ 1,112,000
Additions based on tax positions related to the current year		0	0	0
Additions for tax positions of prior years		0	0	0
Reductions for tax positions of prior years		0	0	0
Reductions due to lapse in statute of limitations		0	0	0
Settlements		0	0	(1,112,000)
Balance at end of the period		0	0	0	$ 1,112,000
Valuation allowance for deferred tax assets		0	0
Unrecognized tax benefits that would affect the effective tax rate if recognized		0	0	0
Interest and penalties net of tax recognized		0	0	(90,000)
Accrued interest and penalties		0	0	0
Investment securities available-for-sale
Reasons for the difference between income tax expense and statutory federal income tax
Total provision		$ 67,000	$ 0	$ (83,000)

Contingent Liabilities, Commi_3

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Gross rental expense	$ 3,730
Liability for repurchases		$ 330	$ 290
Operating lease right of use assets		23,825	24,147
Operating Lease, Right-of-Use Asset, Corporate Office Building			14,650
Operating lease liabilities		$ 23,688	24,319
Operating Lease, Liability, Corporate Office Building			$ 14,640
Operating Lease, Liability, Statement of Financial Position [Extensible List]		us-gaap:OtherLiabilities	us-gaap:OtherLiabilities

Contingent Liabilities, Commi_4

Contingent Liabilities, Commitments, and Financial Instruments with Off-Balance-Sheet Risk (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)Rate	Dec. 31, 2019USD ($)Rate	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 3,472	$ 3,487
Short-term lease cost	8	41
Variable lease cost	(30)	0
Total operating lease cost	3,450	3,528
Operating Leases, Rent Expense, Net [Abstract]
Gross rental expense			$ 3,730
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	3,639
2022	3,944
2023	3,590
2024	2,681
2025	2,497
Thereafter	9,194
Total lease payments	25,545
Imputed interest	(1,857)
Operating lease liabilities	$ 23,688	$ 24,319
Weighted average remaining lease term	10 years 2 months 1 day	10 years 10 months 17 days
Weighted average discount rate | Rate	1.80%	2.83%
Operating cash flows from operating leases	$ 3,794	$ 3,768
Net gain on sale of building with a subsequent operating lease		$ 1,310
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, 2020	Dec. 31, 2019
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet instruments	$ 1,140,892	$ 1,095,054
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet instruments	$ 24,884	27,549
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	$ 7,095	$ 2,332
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, 2020	Dec. 31, 2019
Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	$ 1,226,150	$ 1,108,391
Asset derivatives, Fair value	48,141	22,160
Liability derivatives, Fair value	47,971	22,390
Interest rate swap contracts
Derivative Financial Instruments
Asset derivatives, Fair value	52,872	22,279
Interest rate swap contracts | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	1,155,252	1,074,809
Asset derivatives, Fair value	46,654	21,975
Liability derivatives, Fair value	47,681	22,352
Loan commitments | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	32,588	9,950
Asset derivatives, Fair value	1,487	185
Liability derivatives, Fair value	0	0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments
Derivative Financial Instruments
Derivative, Notional Amount	38,310	23,632
Asset derivatives, Fair value	0	0
Liability derivatives, Fair value	$ 290	$ 38

Derivative Financial Instrume_4

Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Financial Instruments
Gain (loss)	$ 1,279	$ 1,274	$ 919
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	(650)	(252)	(30)
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	879	1,356	1,028
Loan commitments | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	1,302	73	46
Forward contracts - mortgage loan | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	$ (252)	$ 97	$ (125)

Derivative Financial Instrume_5

Derivative Financial Instruments (Details 3) - Interest rate swap contracts - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Offsetting Assets
Gross Amounts of Recognized Assets	$ 52,872	$ 22,279
Gross Amounts Offset in the Statement of Financial Condition	6,218	304
Net Amounts of Assets Presented in the Statement of Financial Condition	46,654	21,975
Gross Amounts Not Offset in the Statement of Financial Condition
Financial instruments	0	0
Cash collateral received	0	0
Net Amount	$ 46,654	$ 21,975

Derivative Financial Instrume_6

Derivative Financial Instruments (Details 4) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Offsetting Liabilities
Gross Amounts of Recognized Liabilities	$ 197,463	$ 143,115
Gross Amounts Offset in the Statement of Financial Condition	6,218	304
Net Amounts Offset in the Statement of Financial Condition	191,245	142,811
Gross Amounts Not Offset in the Statement of Financial Condition
Financial instruments	190,542	143,941
Cash Collateral Pledged	0	0
Net Amount	703	(1,130)
Interest rate swap contracts
Offsetting Liabilities
Gross Amounts of Recognized Liabilities	53,899	22,656
Gross Amounts Offset in the Statement of Financial Condition	6,218	304
Net Amounts Offset in the Statement of Financial Condition	47,681	22,352
Gross Amounts Not Offset in the Statement of Financial Condition
Financial instruments	46,978	23,482
Cash Collateral Pledged	0	0
Net Amount	703	(1,130)
Repurchase agreements
Offsetting Liabilities
Gross Amounts of Recognized Liabilities	143,564	120,459
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts Offset in the Statement of Financial Condition	143,564	120,459
Gross Amounts Not Offset in the Statement of Financial Condition
Financial instruments	143,564	120,459
Net Amount	0	0
Repurchase agreements
Gross Amounts Not Offset in the Statement of Financial Condition
Cash Collateral Pledged	$ 0	$ 0

Derivative Financial Instrume_7

Derivative Financial Instruments (Details 5) - U.S. Treasury and Federal agencies securities - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 141,420	$ 119,450
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 2,140	$ 1,010

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Total Capital (to Risk-Weighted Assets):
Actual Amount	$ 966,092	$ 882,453
Actual Ratio (as a percent)	0.1599	0.1490
Minimum Capital Adequacy Amount	$ 483,350	$ 473,782
Minimum Capital Adequacy Ratio (as a percent)	0.0800	0.0800
Minimum Capital Adequacy with Capital Buffer Amount	$ 634,397	$ 621,839
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.1050	0.1050
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 604,188	$ 592,227
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	$ 889,709	$ 807,926
Actual Ratio (as a percent)	0.1473	0.1364
Minimum Capital Adequacy Amount	$ 362,513	$ 355,336
Minimum Capital Adequacy Ratio (as a percent)	0.0600	0.0600
Minimum Capital Adequacy with Capital Buffer Amount	$ 513,560	$ 503,393
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0850	0.0850
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 483,350	$ 473,782
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	$ 788,884	$ 743,467
Actual Ratio (as a percent)	0.1306	0.1255
Minimum Capital Adequacy Amount	$ 271,884	$ 266,502
Minimum Capital Adequacy Ratio (as a percent)	0.0450	0.0450
Minimum Capital Adequacy with Capital Buffer Amount	$ 422,931	$ 414,559
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0700	0.0700
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 392,722	$ 384,948
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	$ 889,709	$ 807,926
Actual Ratio (as a percent)	0.1215	0.1219
Minimum Capital Adequacy Amount	$ 292,977	$ 265,122
Minimum Capital Adequacy Ratio (as a percent)	0.0400	0.0400
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 366,221	$ 331,402
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	$ 881,983	$ 804,131
Actual Ratio (as a percent)	0.1459	0.1357
Minimum Capital Adequacy Amount	$ 483,637	$ 474,189
Minimum Capital Adequacy Ratio (as a percent)	0.0800	0.0800
Minimum Capital Adequacy with Capital Buffer Amount	$ 634,774	$ 622,373
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.1050	0.1050
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 604,546	$ 592,736
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	$ 805,556	$ 729,541
Actual Ratio (as a percent)	0.1332	0.1231
Minimum Capital Adequacy Amount	$ 362,728	$ 355,642
Minimum Capital Adequacy Ratio (as a percent)	0.0600	0.0600
Minimum Capital Adequacy with Capital Buffer Amount	$ 513,864	$ 503,826
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0850	0.0850
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 483,637	$ 474,189
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	$ 761,731	$ 722,082
Actual Ratio (as a percent)	0.1260	0.1218
Minimum Capital Adequacy Amount	$ 272,046	$ 266,731
Minimum Capital Adequacy Ratio (as a percent)	0.0450	0.0450
Minimum Capital Adequacy with Capital Buffer Amount	$ 423,182	$ 414,915
Minimum Capital Adequacy with Capital Buffer Ratio (as a percent)	0.0700	0.0700
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 392,955	$ 385,279
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	$ 805,556	$ 729,541
Actual Ratio (as a percent)	0.1100	0.1103
Minimum Capital Adequacy Amount	$ 292,959	$ 264,500
Minimum Capital Adequacy Ratio (as a percent)	0.0400	0.0400
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 366,199	$ 330,625
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, 2020	Dec. 31, 2019
Fair value measurements
Fair value carrying amount		$ 12,885	$ 20,277
Mortgages held for sale reported at fair value
Fair value measurements
Fair value carrying amount		12,885	20,277
Aggregate unpaid principal		11,045	19,890
Excess of fair value carrying amount over (under) unpaid principal	[1]	$ 1,840	$ 387
[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, 2020	Dec. 31, 2019
Fair value measurements
Investment securities available-for-sale	$ 1,197,467	$ 1,040,583
Assets:
Mortgages held for sale	12,885	20,277
U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	619,482	526,964
U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	81,127	84,505
Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	453,789	375,389
Corporate debt securities
Fair value measurements
Investment securities available-for-sale	42,369	53,025
Foreign government and other securities
Fair value measurements
Investment securities available-for-sale	700	700
Total
Fair value measurements
Investment securities available-for-sale	1,197,467	1,040,583
Assets:
Mortgages held for sale	12,885	20,277
Level 1
Fair value measurements
Investment securities available-for-sale	80,285	80,393
Assets:
Mortgages held for sale	0	0
Level 2
Fair value measurements
Investment securities available-for-sale	1,115,030	957,898
Assets:
Mortgages held for sale	12,885	20,277
Level 3
Fair value measurements
Investment securities available-for-sale	2,152	2,292
Assets:
Mortgages held for sale	0	0
Recurring | Total
Fair value measurements
Investment securities available-for-sale	1,197,467	1,040,583
Assets:
Mortgages held for sale	12,885	20,277
Total	1,257,006	1,082,835
Liabilities:
Total	47,681	22,352
Recurring | Total | Interest rate swap contracts
Assets:
Accrued income and other assets	46,654	21,975
Liabilities:
Accrued expenses and other liabilities	47,681	22,352
Recurring | Total | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	619,482	526,964
Recurring | Total | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	81,127	84,505
Recurring | Total | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	453,789	375,389
Recurring | Total | Corporate debt securities
Fair value measurements
Investment securities available-for-sale	42,369	53,025
Recurring | Total | Foreign government and other securities
Fair value measurements
Investment securities available-for-sale	700	700
Recurring | Level 1
Fair value measurements
Investment securities available-for-sale	80,285	80,393
Assets:
Mortgages held for sale	0	0
Total	80,285	80,393
Liabilities:
Total	0	0
Recurring | Level 1 | Interest rate swap contracts
Assets:
Accrued income and other assets	0	0
Liabilities:
Accrued expenses and other liabilities	0	0
Recurring | Level 1 | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	80,285	80,393
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	1,115,030	957,898
Assets:
Mortgages held for sale	12,885	20,277
Total	1,174,569	1,000,150
Liabilities:
Total	47,681	22,352
Recurring | Level 2 | Interest rate swap contracts
Assets:
Accrued income and other assets	46,654	21,975
Liabilities:
Accrued expenses and other liabilities	47,681	22,352
Recurring | Level 2 | U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	539,197	446,571
Recurring | Level 2 | U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	78,975	82,213
Recurring | Level 2 | Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	453,789	375,389
Recurring | Level 2 | Corporate debt securities
Fair value measurements
Investment securities available-for-sale	42,369	53,025
Recurring | Level 2 | Foreign government and other securities
Fair value measurements
Investment securities available-for-sale	700	700
Recurring | Level 3
Fair value measurements
Investment securities available-for-sale	2,152	2,292
Assets:
Mortgages held for sale	0	0
Total	2,152	2,292
Liabilities:
Total	0	0
Recurring | Level 3 | Interest rate swap contracts
Assets:
Accrued income and other assets	0	0
Liabilities:
Accrued expenses and other liabilities	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	2,152	2,292
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, 2020	Dec. 31, 2019
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	2,292,000	1,025,000
Total gains or losses (realized/unrealized): included in earnings	0	0
Total gains or losses (realized/unrealized): included in other comprehensive income	58,000	(35,000)
Purchases	3,100,000	5,600,000
Issuances	0	0
Sales	0	0
Settlements	0	0
Maturities	(3,298,000)	(4,298,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at the end of the period	$ 2,152,000	$ 2,292,000

Fair Value Measurements (Deta_4

Fair Value Measurements (Details 4) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Valuation Methodology
Investment securities, available-for-sale	$ 1,197,467	$ 1,040,583
Level 3
Valuation Methodology
Investment securities, available-for-sale	2,152	2,292
Recurring | Level 3
Valuation Methodology
Investment securities, available-for-sale	2,152	2,292
Recurring | Level 3 | Discounted cash flows | Direct placement municipal securities
Valuation Methodology
Investment securities, available-for-sale	$ 2,152	$ 2,292
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)	0.0004	0.0012
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)	0.0230	0.0285
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)	0.0155
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, 2020	Dec. 31, 2019
Collateral-dependent impaired loans
Fair value measurements
Impairment charges (recoveries)	$ 7,730	$ 4,290
Mortgage servicing rights
Fair value measurements
Impairment charges (recoveries)	810	0
Repossessions
Fair value measurements
Impairment charges (recoveries)	1,070	2,250
Other real estate
Fair value measurements
Impairment charges (recoveries)	0	0
Total
Fair value measurements
Collateral-dependent impaired loans	11,991	8,492
Assets measured at fair value	18,130	21,837
Total | Mortgage servicing rights
Fair value measurements
Accrued income and other assets	3,804	4,200
Total | Repossessions
Fair value measurements
Accrued income and other assets	1,976	8,623
Total | Other real estate
Fair value measurements
Accrued income and other assets	359	522
Level 3
Fair value measurements
Collateral-dependent impaired loans	11,991	8,492
Assets measured at fair value	18,130	21,837
Level 3 | Mortgage servicing rights
Fair value measurements
Accrued income and other assets	3,804	4,200
Level 3 | Repossessions
Fair value measurements
Accrued income and other assets	1,976	8,623
Level 3 | Other real estate
Fair value measurements
Accrued income and other assets	$ 359	$ 522

Fair Value Measurements (Deta_6

Fair Value Measurements (Details 6) - Non-recurring $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Level 3
Valuation Methodology
Assets measured at fair value	$ 18,130	$ 21,837
Carrying Value | Level 3 | Collateral based measurements | Collateral-dependent impaired loans
Valuation Methodology
Assets measured at fair value	11,991	8,492
Carrying Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	3,804	4,200
Carrying Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	1,976	8,623
Carrying Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	359	522
Fair Value
Valuation Methodology
Assets measured at fair value	18,130	21,837
Fair Value | Level 3 | Collateral based measurements | Collateral-dependent impaired loans
Valuation Methodology
Assets measured at fair value	11,991	8,492
Fair Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	4,038	5,986
Fair Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	2,144	9,211
Fair Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	$ 388	$ 564
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	0
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)	1	0.90
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)	0.437
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.162	0.102
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.305	0.281
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)	0.228
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.083	0.093
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.111	0.121
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Weighted Average [Member]
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.085
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Minimum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0	0.03
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Maximum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0.16	0.25
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)	0.08
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Minimum
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0.06	0
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Maximum
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0.13	0.11
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Weighted Average [Member]
Unobservable Inputs
Other real estate unobservable inputs (as a percent)	0.07

Fair Value Measurements (Deta_7

Fair Value Measurements (Details 7) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash and due from banks		$ 74,186	$ 67,215
Federal funds sold and interest bearing deposits with other banks		168,861	16,150
Investment securities available-for-sale		1,197,467	1,040,583
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		27,429	28,414
Mortgages held for sale		12,885	20,277
Loans and leases, net of reserve for loan and lease losses		5,348,647	4,974,273
Liabilities:
Long-term debt and mandatorily redeemable securities		81,864	71,639
Subordinated notes		58,764	58,764
Carrying or Contract Value
Assets:
Cash and due from banks		74,186	67,215
Federal funds sold and interest bearing deposits with other banks		168,861	16,150
Investment securities available-for-sale		1,197,467	1,040,583
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		27,429	28,414
Mortgages held for sale		12,885	20,277
Loans and leases, net of reserve for loan and lease losses		5,348,647	4,974,273
Mortgage servicing rights		3,804	4,200
Interest receivable		20,242	19,125
Interest rate swaps		46,654	21,975
Liabilities:
Deposits		5,946,028	5,357,326
Short-term borrowings		150,641	145,893
Long-term debt and mandatorily redeemable securities		81,864	71,639
Subordinated notes		58,764	58,764
Interest payable		3,996	13,918
Interest rate swaps		47,681	22,352
Off-balance-sheet instruments	[1]	0	0
Fair Value
Assets:
Cash and due from banks		74,186	67,215
Federal funds sold and interest bearing deposits with other banks		168,861	16,150
Investment securities available-for-sale		1,197,467	1,040,583
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		27,429	28,414
Mortgages held for sale		12,885	20,277
Loans and leases, net of reserve for loan and lease losses		5,417,396	4,992,684
Mortgage servicing rights		4,038	5,986
Interest receivable		20,242	19,125
Interest rate swaps		46,654	21,975
Liabilities:
Deposits		5,955,545	5,362,633
Short-term borrowings		150,641	145,893
Long-term debt and mandatorily redeemable securities		82,965	71,084
Subordinated notes		58,560	61,469
Interest payable		3,996	13,918
Interest rate swaps		47,681	22,352
Off-balance-sheet instruments	[1]	321	281
Level 1
Assets:
Cash and due from banks		74,186	67,215
Federal funds sold and interest bearing deposits with other banks		168,861	16,150
Investment securities available-for-sale		80,285	80,393
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		27,429	28,414
Mortgages held for sale		0	0
Loans and leases, net of reserve for loan and lease losses		0	0
Mortgage servicing rights		0	0
Interest receivable		0	0
Interest rate swaps		0	0
Liabilities:
Deposits		4,778,671	3,708,828
Short-term borrowings		143,730	120,891
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		1,115,030	957,898
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		0	0
Mortgages held for sale		12,885	20,277
Loans and leases, net of reserve for loan and lease losses		0	0
Mortgage servicing rights		0	0
Interest receivable		20,242	19,125
Interest rate swaps		46,654	21,975
Liabilities:
Deposits		1,176,874	1,653,805
Short-term borrowings		6,911	25,002
Long-term debt and mandatorily redeemable securities		82,965	71,084
Subordinated notes		58,560	61,469
Interest payable		3,996	13,918
Interest rate swaps		47,681	22,352
Off-balance-sheet instruments	[1]	321	281
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		2,152	2,292
Federal Home Loan Bank Stock and Federal Reserve Bank Stock		0	0
Mortgages held for sale		0	0
Loans and leases, net of reserve for loan and lease losses		5,417,396	4,992,684
Mortgage servicing rights		4,038	5,986
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, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Operating lease right of use assets	$ 23,825	$ 24,147
Other assets	288,575	227,990
Total assets	7,316,411	6,622,776
LIABILITIES AND SHAREHOLDERS' EQUITY
Long-term debt and mandatorily redeemable securities	81,864	71,639
Subordinated notes	58,764	58,764
Operating lease liabilities	23,688	24,319
Other liabilities	148,444	140,518
Total liabilities	6,385,741	5,774,140
Total shareholders’ equity	886,845	828,277
Total liabilities and shareholders’ equity	7,316,411	6,622,776
Parent
ASSETS
Cash and cash equivalents	113,242	107,285	$ 106,647	$ 100,155
Operating lease right of use assets	17,452	17,106
Other assets	5,251	4,442
Total assets	995,439	935,526
LIABILITIES AND SHAREHOLDERS' EQUITY
Commercial paper	4,767	3,993
Long-term debt and mandatorily redeemable securities	26,681	25,819
Subordinated notes	58,764	58,764
Operating lease liabilities	17,369	17,329
Other liabilities	1,013	1,344
Total liabilities	108,594	107,249
Total shareholders’ equity	886,845	828,277
Total liabilities and shareholders’ equity	995,439	935,526
Parent | Bank subsidiaries
ASSETS
Short-term investments with bank subsidiary	500	500
Investments in subsidiary	858,993	806,192
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, 2020	Dec. 31, 2019	Dec. 31, 2018
Income:
Other	$ 11,949	$ 13,019	$ 10,362
Expenses:
Interest on subordinated notes	3,367	3,677	3,625
Interest on long-term debt and mandatorily redeemable securities	2,868	2,905	2,316
Interest on commercial paper and other short-term borrowings	517	1,934	2,838
Occupancy	10,276	10,528	10,041
Other	7,902	6,534	6,478
Income before income taxes	106,341	120,154	105,027
Income tax benefit	(24,880)	(28,139)	(22,613)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	94,636	107,808	75,788
Parent
Income:
Rental (reimbursements to) income from subsidiaries	(908)	2,505	2,613
Other	293	366	367
Investment securities and other investment (losses) gains	(44)	109	(180)
Total income	45,548	49,715	47,880
Expenses:
Interest on subordinated notes	3,367	3,677	3,625
Interest on long-term debt and mandatorily redeemable securities	2,151	2,228	1,624
Interest on commercial paper and other short-term borrowings	11	13	14
Occupancy	1,816	1,861	1,774
Other	667	586	642
Total expenses	8,012	8,365	7,679
Income before income taxes	37,536	41,350	40,201
Income tax benefit	1,747	987	1,009
Income before equity in undistributed income of subsidiaries	39,283	42,337	41,210
Equity in undistributed income of subsidiaries	42,178	49,678	41,204
Net income	81,461	92,015	82,414
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	94,660	107,863	75,788
Parent | Bank subsidiaries
Income:
Dividends from bank subsidiary	46,207	46,735	45,080
Expenses:
Equity in undistributed income of subsidiaries	$ 42,178	$ 49,678	$ 41,204

1st Source Corporation (Paren_5

1st Source Corporation (Parent Company Only) Financial Information (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	$ 5,673	$ 5,786	$ 5,620
Amortization of right of use assets	2,842	3,046	0
Stock-based compensation	3,293	2,765	3,553
Other	940	1,734	940
Investing activities:
Net change in partnership investments	(54,981)	(33,840)	(13,669)
Financing activities:
Proceeds from issuance of long-term debt and mandatorily redeemable securities	10,000	0	0
Payments on long-term debt and mandatorily redeemable securities	(2,905)	(2,695)	(1,735)
Stock issued under stock purchase plans	39	49	145
Acquisition of treasury stock	(6,415)	(15,085)	(9,271)
Cash dividends paid on common stock	(29,764)	(29,021)	(25,686)
Parent Company
1st Source Corporation (Parent Company Only) Financial Information
Net income	81,461	92,015	82,414
Adjustments to reconcile net income to net cash provided by operating activities:
Equity (undistributed) distributed in excess of income of subsidiaries	(42,178)	(49,678)	(41,204)
Depreciation of premises and equipment	2	2	2
Amortization of right of use assets	1,107	1,350	0
Stock-based compensation	94	78	71
Realized/unrealized investment securities and other investment losses (gains)	44	(109)	180
Other	(103)	533	45
Net change in operating activities	40,427	44,191	41,508
Investing activities:
Net change in partnership investments	(182)	(260)	(980)
Payments to Acquire Businesses and Interest in Affiliates	0	(325)	0
Net change in investing activities	(182)	(585)	(980)
Financing activities:
Net change in commercial paper	774	(332)	(1,790)
Proceeds from issuance of long-term debt and mandatorily redeemable securities	1,640	1,611	1,867
Payments on long-term debt and mandatorily redeemable securities	(2,268)	(2,068)	(1,064)
Stock issued under stock purchase plans	39	49	145
Net proceeds from issuance of treasury stock	1,706	1,878	1,763
Acquisition of treasury stock	(6,415)	(15,085)	(9,271)
Cash dividends paid on common stock	(29,764)	(29,021)	(25,686)
Net change in financing activities	(34,288)	(42,968)	(34,036)
Net change in cash and cash equivalents	5,957	638	6,492
Cash and cash equivalents, beginning of year	107,285	106,647	100,155
Cash and cash equivalents, end of year	$ 113,242	$ 107,285	$ 106,647