Mercantile Bank (MBWM) 10-K 3 Mar 23 2022 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 28, 2023	Jun. 30, 2022
Document Information [Line Items]
Entity Central Index Key	0001042729
Entity Registrant Name	MERCANTILE BANK CORPORATION
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	000-26719
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-3360865
Entity Address, Address Line One	310 Leonard Street NW
Entity Address, City or Town	Grand Rapids
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49504
City Area Code	616
Local Phone Number	406-3000
Title of 12(b) Security	Common Stock
Trading Symbol	MBWM
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	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 487,000,000
Entity Common Stock, Shares Outstanding		15,995,107
Auditor Name	BDO USA, LLP
Auditor Firm ID	243
Auditor Location	Grand Rapids, Michigan

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 61,894,000	$ 59,405,000
Interest-earning deposits	34,878,000	915,755,000
Total cash and cash equivalents	96,772,000	975,160,000
Securities available for sale	602,936,000	592,743,000
Federal Home Loan Bank stock	17,721,000	18,002,000
Mortgage loans held for sale	3,565,000	16,117,000
Loans	3,916,619,000	3,453,459,000
Allowance for credit losses	(42,246,000)	(35,363,000)
Loans, net	3,874,373,000	3,418,096,000
Premises and equipment, net	51,476,000	57,298,000
Bank owned life insurance	80,727,000	75,242,000
Goodwill	49,473,000	49,473,000
Core deposit intangible, net	583,000	1,351,000
Other assets	94,993,000	54,267,000
Total assets	4,872,619,000	5,257,749,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	1,604,750,000	1,677,952,000
Interest-bearing	2,108,061,000	2,405,241,000
Total deposits	3,712,811,000	4,083,193,000
Securities sold under agreements to repurchase	194,340,000	197,463,000
Federal Home Loan Bank advances	308,263,000	374,000,000
Subordinated debentures	48,958,000	48,244,000
Subordinated notes	88,628,000	73,646,000
Accrued interest and other liabilities	78,211,000	24,644,000
Total liabilities	4,431,211,000	4,801,190,000
Commitments and contingent liabilities (Note 13)
Shareholders' equity
Preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at December 31, 2022 and December 31, 2021	0	0
Common stock, no par value; 40,000,000 shares authorized; 15,994,884 shares outstanding at December 31, 2022 and 15,839,944 shares outstanding at December 31, 2021	290,436,000	285,752,000
Retained earnings	216,313,000	174,536,000
Accumulated other comprehensive gain/(loss)	(65,341,000)	(3,729,000)
Total shareholders’ equity	441,408,000	456,559,000
Total liabilities and shareholders’ equity	$ 4,872,619,000	$ 5,257,749,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares $ / shares in Thousands	Dec. 31, 2022	Dec. 31, 2021
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares outstanding (in shares)	15,994,884	15,839,944

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income
Loans, including fees	$ 166,848,000	$ 135,048,000	$ 137,399,000
Securities, taxable	7,603,000	5,127,000	7,740,000
Securities, tax-exempt	2,734,000	2,386,000	2,298,000
Other interest-earning assets	4,654,000	933,000	876,000
Total interest income	181,839,000	143,494,000	148,313,000
Interest expense
Deposits	10,037,000	9,114,000	14,984,000
Short-term borrowings	294,000	170,000	173,000
Federal Home Loan Bank advances	7,125,000	8,177,000	8,571,000
Subordinated debentures and other borrowings	6,139,000	1,971,000	2,339,000
Total interest expense	23,595,000	19,432,000	26,067,000
Net interest income	158,244,000	124,062,000	122,246,000
Provision (benefit) for credit losses	6,550,000	(4,300,000)	14,050,000
Net interest income after provision for credit losses	151,694,000	128,362,000	108,196,000
Noninterest income:
Mortgage banking activities	8,664,000	29,959,000	29,346,000
Interest rate swap program fees	3,488,000	6,862,000	932,000
Payroll processing	2,178,000	1,815,000	1,745,000
Earnings on bank owned life insurance	1,678,000	1,164,000	1,214,000
Gain on sale of branch	0	1,058,000	0
Other income	1,901,000	2,768,000	1,384,000
Total noninterest income	32,077,000	56,220,000	45,172,000
Noninterest expense
Salaries and benefits	65,124,000	66,447,000	59,799,000
Occupancy	8,362,000	8,088,000	7,950,000
Furniture and equipment rent, depreciation and maintenance	3,614,000	3,654,000	3,350,000
Data processing	12,359,000	11,104,000	10,440,000
Advertising	1,445,000	1,175,000	1,292,000
FDIC insurance costs	1,239,000	1,820,000	1,138,000
Charitable foundation contributions	1,514,000	4,020,000	0
Other expense	14,324,000	14,558,000	14,551,000
Total noninterest expenses	107,981,000	110,866,000	98,520,000
Income before federal income tax expense	75,790,000	73,716,000	54,848,000
Federal income tax expense	14,727,000	14,695,000	10,710,000
Net income	$ 61,063,000	$ 59,021,000	$ 44,138,000
Earnings per common share:
Basic (in dollars per share)	$ 3.85	$ 3.69	$ 2.71
Diluted (in dollars per share)	$ 3.85	$ 3.69	$ 2.71
Service Charges on Deposit and Sweep Accounts [Member]
Noninterest income:
Noninterest revenue	$ 5,952,000	$ 5,078,000	$ 4,578,000
Credit and Debit Card [Member]
Noninterest income:
Noninterest revenue	$ 8,216,000	$ 7,516,000	$ 5,973,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 61,063,000	$ 59,021,000	$ 44,138,000
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	(77,990,000)	(11,664,000)	2,268,000
Total other comprehensive income (loss)	(77,990,000)	(11,664,000)	2,268,000
Tax effect of unrealized holding gains (losses) on securities available for sale	16,378,000	2,449,000	(477,000)
Total tax effect of other comprehensive income (loss)	16,378,000	2,449,000	(477,000)
Other comprehensive income (loss), net of tax effect	(61,612,000)	(9,215,000)	1,791,000
Comprehensive income (loss)	$ (549,000)	$ 49,806,000	$ 45,929,000

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Preferred Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances at Dec. 31, 2019			$ 0	$ 305,035,000	$ 107,831,000	$ 3,695,000	$ 416,561,000
Employee stock purchase plan				49,000			49,000
Dividend reinvestment plan				814,000			814,000
Stock option exercises				3,000			3,000
Stock grants to directors for retainer fees				394,000			394,000
Stock-based compensation expense				2,325,000			2,325,000
Share repurchase program				(6,591,000)			(6,591,000)
Cash dividends					(17,930,000)		(17,930,000)
Net income					44,138,000		44,138,000
Change in net unrealized gain/(loss) on securities available for sale, net of tax effect						1,791,000	1,791,000
Balances at Dec. 31, 2020			0	302,029,000	134,039,000	5,486,000	441,554,000
Employee stock purchase plan				48,000			48,000
Dividend reinvestment plan				877,000			877,000
Stock option exercises				50,000			50,000
Stock grants to directors for retainer fees				344,000			344,000
Stock-based compensation expense				3,784,000			3,784,000
Share repurchase program				(21,380,000)			(21,380,000)
Cash dividends					(18,524,000)		(18,524,000)
Net income					59,021,000		59,021,000
Change in net unrealized gain/(loss) on securities available for sale, net of tax effect						(9,215,000)	(9,215,000)
Balances (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2021	$ 316,000	$ 316,000
Balances at Dec. 31, 2021			0	285,752,000	174,536,000	(3,729,000)	456,559,000
Employee stock purchase plan				45,000			45,000
Dividend reinvestment plan				867,000			867,000
Stock option exercises				36,000			36,000
Stock grants to directors for retainer fees				359,000			359,000
Stock-based compensation expense				3,377,000			3,377,000
Cash dividends					(19,602,000)		(19,602,000)
Net income					61,063,000		61,063,000
Change in net unrealized gain/(loss) on securities available for sale, net of tax effect						(61,612,000)	(61,612,000)
Balances at Dec. 31, 2022			$ 0	$ 290,436,000	$ 216,313,000	$ (65,341,000)	$ 441,408,000

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee stock purchase plan (in shares)	1,388	1,481	2,264
Dividend reinvestment plan (in shares)	25,941	27,562	35,479
Stock option exercises (in shares)	1,355	2,000	753
Stock grants to directors for retainer fees (in shares)	11,166	10,489	17,716
Share repurchase program (in shares)		683,191	236,393
Cash dividends per common share (in dollars per share)	$ 1.26	$ 1.18	$ 1.12

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income	$ 61,063,000	$ 59,021,000	$ 44,138,000
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	12,945,000	13,678,000	9,425,000
Accretion of acquired loans	0	(135,000)	(449,000)
Provision (benefit) for credit losses	6,550,000	(4,300,000)	14,050,000
Deferred income tax expense (benefit)	(1,353,000)	2,020,000	(4,141,000)
Stock-based compensation expense	3,377,000	3,784,000	2,325,000
Stock grants to directors for retainer fee	359,000	344,000	394,000
Proceeds from sales of mortgage loans held for sale	237,779,000	686,418,000	677,634,000
Origination of mortgage loans held for sale	(217,030,000)	(649,245,000)	(665,992,000)
Net gain on sales of mortgage loans held for sale	(8,197,000)	(30,402,000)	(29,541,000)
Net gain from sales and valuation write-downs of foreclosed assets	(69,000)	(78,000)	(325,000)
Net (gain) loss from sale and write-downs on former bank premises	275,000	(140,000)	(27,000)
Net (gain) loss from sales and disposals of premises and equipment	(36,000)	246,000	1,514,000
Earnings on bank owned life insurance	(1,678,000)	(1,164,000)	(1,214,000)
Gain on sale of branch	0	(1,058,000)	0
Net (gain) loss on instruments designated at fair value and related derivatives	(45,000)	224,000	24,000
Net change in:
Accrued interest receivable	(6,165,000)	1,528,000	(917,000)
Other assets	(437,000)	(12,655,000)	(9,907,000)
Accrued interest and other liabilities	32,524,000	(3,513,000)	886,000
Net cash from operating activities	119,862,000	64,573,000	37,877,000
Cash flows from investing activities
Purchases of securities available for sale	(107,011,000)	(298,708,000)	(369,682,000)
Proceeds from maturities, calls and repayments of securities available for sale	17,984,000	80,432,000	321,164,000
Loan originations and payments, net	(462,427,000)	(267,899,000)	(341,461,000)
Proceeds from Federal Home Loan Bank stock redemption	281,000	0	0
Purchases of bank owned life insurance	(4,500,000)	(2,000,000)	(700,000)
Proceeds from bank owned life insurance death benefits claim	628,000	0	0
Net cash transferred in branch sale	0	(2,679,000)	0
Purchases of premises and equipment and lease activity	(3,017,000)	(5,602,000)	(8,989,000)
Proceeds from sales of former bank premises	2,994,000	753,000	162,000
Proceeds from sales of foreclosed assets	69,000	196,000	700,000
Net cash for investing activities	(554,999,000)	(495,507,000)	(398,806,000)
Cash flows from financing activities
Net decrease in time deposits	(57,189,000)	(120,512,000)	(99,294,000)
Net (decrease) increase in all other deposits	(313,193,000)	806,796,000	820,463,000
Net (decrease) increase in securities sold under agreements to repurchase	(3,123,000)	79,098,000	15,690,000
Proceeds from Federal Home Loan Bank advances	28,263,000	0	60,000,000
Maturities of Federal Home Loan Bank advances	(94,000,000)	(20,000,000)	(20,000,000)
Net proceeds from subordinated notes issuance	14,645,000	73,635,000	0
Proceeds from stock option exercises, net of cashless exercises	36,000	50,000	3,000
Employee stock purchase plan	45,000	48,000	49,000
Dividend reinvestment plan	867,000	877,000	814,000
Repurchases of common stock	0	(21,380,000)	(6,591,000)
Payment of cash dividends to common shareholders	(19,602,000)	(18,524,000)	(17,930,000)
Net cash (for) from financing activities	(443,251,000)	780,088,000	753,204,000
Net change in cash and cash equivalents	(878,388,000)	349,154,000	392,275,000
Cash and cash equivalents at beginning of period	975,160,000	626,006,000	233,731,000
Cash and cash equivalents at end of period	96,772,000	975,160,000	626,006,000
Supplemental disclosures of cash flows information
Interest	21,765,000	20,352,000	27,703,000
Federal income taxes	11,200,000	17,550,000	10,950,000
Noncash financing and investing activities:
Transfers from loans to foreclosed assets	0	30,000	146,000
Transfers from bank premises to other real estate owned	0	0	613,000
Transfers from premises and equipment to other assets	$ 2,847,000	$ 0	$ 0

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1 Principles of Consolidation Mercantile has five separate business trusts: Mercantile Bank Capital Trust I, Firstbank Capital Trust I, Firstbank Capital Trust II, Firstbank Capital Trust III and Firstbank Capital Trust IV (“our trusts”). Our trusts were formed to issue trust preferred securities. We issued subordinated debentures to our trusts in return for the proceeds raised from the issuance of the trust preferred securities. Our trusts are not Nature of Operations July 15, 1997 December 15, 1997. June 1, 2014. Our bank is a community-based financial institution. Our bank’s primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are commercial loans, residential mortgage loans, and instalment loans. Substantially all loans are secured by specific items of collateral including business assets, real estate or consumer assets. Commercial loans are expected to be repaid from cash flow from operations of businesses. Real estate loans are secured by commercial or residential real estate. We have no one Our insurance company acquired an existing shelf insurance agency effective April 15, 2002. not no We have evaluated subsequent events for potential recognition and/or disclosure through the date these financial statements were issued. Use of Estimates Coronavirus Pandemic: 2019 19” 2 19 may 19 The Coronavirus Pandemic has had a significant impact on our financial condition and operating results since its onset in March, 2020. March, 2022. 2022 2021. The following section summarizes the primary Covid- 19 ● Paycheck Protection Program The Paycheck Protection Program (“PPP”) reflected a substantial expansion of the Small Business Administration’s 100% 7 $350 500 100% 100% 1.00%, August 8, 2020. December 31, 2022, 2022. The Consolidated Appropriations Act, 2021 $284 May 31, 2021. December 31, 2022, 2022. ● Individual Economic Impact Payments The Internal Revenue Service made three $1,200 April 2020, $600 January 2021, $1,400 March 2021. ● Troubled Debt Restructuring Relief From March 1, 2020 60 December 31, 2020 may 19 2021 January 1, 2022. December 31, 2021. ● Current Expected Credit Loss Methodology Delay Financial institutions were not December 31, 2020. 2021 January 1, 2022. January 1, 2022. We continue to monitor the situation, including cases of sickness within our workforce, and will take action to adjust office attendance policies as circumstances warrant in order to protect the health and safety of employees, contractors, and others who visit our offices. However, if the Coronavirus Pandemic worsens and shutdown orders are issued in the future, our ability to operate could be adversely impacted, depending on the language of such orders. The extent to which the Coronavirus Pandemic continues to impact us will depend on future developments, which are highly uncertain and cannot be predicted. Cash and Cash Equivalents and Cash Flow Reporting 90 Debt Securities first not not not Changes in the allowance under CECL are recorded as provisions for (or reversal of) credit loss expense. Losses are charged against the allowance when the collectability of an available for sale debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met. At December 31, 2022, no Interest income includes amortization of purchase premiums and accretion of discounts. Premiums and discounts on securities are amortized or accreted on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. It is not Loans December 31, 2022 2021. Interest income on commercial loans and mortgage loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer and credit card loans are typically charged off no All interest accrued but not Commercial Loan Participations no no December 31, 2022 2021, Loans Held for Sale Year-end mortgage loans held for sale, included in total loans in the Consolidated Balance Sheets, were as follows: 2022 2021 Mortgage loans held for sale $ 3,565,000 $ 16,117,000 Less: Allowance to adjust to lower of cost or market 0 0 Mortgage loans held for sale, net $ 3,565,000 $ 16,117,000 Mortgage Loan Derivatives not December 31, 2022 2021, Mortgage Banking Activities Servicing fee income is recorded for fees earned for servicing mortgage loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Amortization of mortgage loan servicing rights is netted against mortgage loan servicing income and recorded in mortgage banking activities in the Consolidated Statements of Income. Troubled Debt Restructurings not may The federal banking agencies issued an “ Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus March 22, 2020, April 7, 2020. may six not 4013 December 31, 2019 March 1, 2020 60 March 13, 2020 ( December 31, 2020, not 2020, January 1, 2022. Allowance for Credit Losses ( “ Allowance ” ) June 2016, No. 2016 13, Measurement of Credit Losses on Financial Instruments not December 15, 2019. Financial institutions were not December 31, 2020. 2021, December 2020, January 1, 2022. no January 1, 2022, December 31, 2021. We adopted CECL effective January 1, 2022 January 1, 2022 Accrued interest receivable for loans is included in other assets on our Consolidated Balance Sheet. We elected not 90 The allowance is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged-off against the allowance when we believe the uncollectibility of a loan balance is confirmed. The allowance is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. Commercial loans are divided among five one two not. Our loan portfolio segments as of December 31, 2022 o Commercial Loans ■ Commercial and Industrial ■ Owner Occupied Commercial Real Estate ■ Non-Owner Occupied Commercial Real Estate ■ Multi-Family and Residential Rental ■ Vacant Land, Land Development and Residential Construction o Retail Loans ■ 1 4 ■ Other Consumer Loans The “remaining life methodology” is utilized for substantially all loan pools. This non-discounted cash flow approach projects an estimated future amortized cost basis based on current loan balance and repayment terms. Our historical loss rate is then applied to future loan balances at the instrument level based on remaining contractual life adjusted for amortization, prepayment and default to develop a baseline lifetime loss. The baseline lifetime loss is adjusted for changes in macroeconomic conditions over the reasonable and supportable forecast and reversion periods via a series of macroeconomic forecast inputs, such as gross domestic product, unemployment rates, interest rates, credit spreads, stock market volatility and property price indices, to quantify the impact of current and forecasted economic conditions on expected loan performance. We use migration to determine historical loss rates for commercial loans given the comprehensive loan grading process employed by the bank for over two January 1, 2011 Reasonable and supportable economic forecasts have to be incorporated in determining expected credit losses. The forecast period represents the time frame from the current period end through the point in time that we can reasonably forecast and support entity and environmental factors that are expected to impact the performance of our loan portfolio. Ideally, the economic forecast period would encompass the contractual terms of all loans; however, the ability to produce a forecast that is considered reasonable and supportable becomes more difficult or may not Subsequent to the end of the forecast period, we revert to historical loan data based on an ongoing evaluation of each economic forecast in relation to then current economic conditions as well as any developing loan loss activity and resulting historical data. As of December 31, 2022, one six We are not third December 31, 2022 January 1, 2022 During each reporting period, we also consider the need to adjust the historical loss rates as determined by our migration calculations to reflect the extent to which we expect current conditions and reasonable and supportable economic forecasts to differ from the conditions that existed for the period over which the migration-based historical loss information was determined. These qualitative adjustments may Traditional qualitative factors include: o Changes in lending policies and procedures o Changes in the nature and volume of the loan portfolio and in the terms of loans o Changes in the experience, ability and depth of lending management and other relevant staff o Changes in the volume and severity of past due loans, nonaccrual loans and adversely classified loans o Changes in the quality of the loan review program o Changes in the value of underlying collateral dependent loans o Existence and effect of any concentrations of credit and any changes in such o Effect of other factors such as competition and legal and regulatory requirements The estimation of future credit losses should reflect consideration of all significant factors that affect the collectibility of the loan portfolio at each evaluation date. While our methodology considers both the historical loss rates as well as the traditional qualitative factors, there may January 1, 2022, Expected credit losses are estimated over the contractual terms of the loans, adjusted for expected prepayments when appropriate. The contractual term generally excludes potential extensions, renewals and modifications. We are also required to consider expected credit losses associated with loan commitments over the contractual period in which we are exposed to credit risk on the underlying commitments unless the obligation is unconditionally cancellable by us. Any allowance for off-balance sheet credit exposures is reported as an other liability on our Consolidated Balance Sheet and is increased or decreased via other noninterest expense on our Consolidated Statement of Income. The calculation includes consideration of the likelihood that funding will occur and forecasted credit losses on commitments expected to be funded over their estimated lives. The allowance is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to be funded. Transfers of Financial Assets 1 2 3 not Premises and Equipment 5 33 3 7 may not Foreclosed Assets: December 31, 2022 2021. Bank Owned Life Insurance: not Goodwill and Core Deposit Intangible may not 2022 no The core deposit intangible that arose from the merger with Firstbank was initially measured at fair value and is being amortized into noninterest expense over a ten Repurchase Agreements Financial Instruments and Loan Commitments Stock-Based Compensation Revenue from Contracts with Customers 606, 606” 606, not Our primary sources of revenue are derived from interest and dividends earned on loans, securities and other financial instruments that are not 606. not We generally satisfy our performance obligations on contracts with customers as services are rendered, and the transaction prices are typically fixed and charged either on a periodic basis (generally monthly) or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 The following table depicts our sources of noninterest income presented in the Consolidated Statements of Income for the years ended December 31, 2022, 2021 2020 606: 2022 2021 2020 Service charges on deposit and sweep accounts $ 5,952,000 $ 5,078,000 $ 4,578,000 Credit and debit card fees 8,216,000 7,516,000 5,973,000 Payroll processing 2,178,000 1,815,000 1,745,000 Customer service fees 852,000 857,000 757,000 Service Charges on Deposit and Sweep Accounts: Credit and Debit Card Fees: Payroll Processing Fees: Customer Service Fees: Advertising Costs Income Taxes Fair Values of Financial Instruments not not Earnings Per Share Comprehensive Income Derivatives not Changes in the fair value of derivatives that are designated, for accounting purposes, as a hedge of the variability of cash flows to be received on various assets and liabilities and are effective are reported in other comprehensive income. They are later reclassified into earnings in the same periods during which the hedged transaction affects earnings and are included in the line item in which the hedged cash flows are recorded. If hedge accounting does not no December 31, 2022 2021. Contingencies: not Newly Issued Not No. 2022 02 Financial Instruments Credit Losses (Topic 326 310 40, December 15, 2022. not

Note 2 - Securities

Note 2 - Securities	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 2 SECURITIES The amortized cost and fair value of available for sale securities and the related pre-tax gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows at year-end 2022 2021: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value 2022 U.S. Government agency debt obligations $ 453,836,000 $ 0 $ (65,092,000 ) $ 388,744,000 Mortgage-backed securities 38,002,000 19,000 (6,068,000 ) 31,953,000 Municipal general obligation bonds 163,041,000 450,000 (9,058,000 ) 154,433,000 Municipal revenue bonds 30,267,000 102,000 (3,063,000 ) 27,306,000 Other investments 500,000 0 0 500,000 $ 685,646,000 $ 571,000 $ (83,281,000 ) $ 602,936,000 2021 U.S. Government agency debt obligations $ 398,874,000 $ 266,000 $ (8,769,000 ) $ 390,371,000 Mortgage-backed securities 41,906,000 549,000 (652,000 ) 41,803,000 Municipal general obligation bonds 133,894,000 4,092,000 (392,000 ) 137,594,000 Municipal revenue bonds 22,289,000 331,000 (145,000 ) 22,475,000 Other investments 500,000 0 0 500,000 $ 597,463,000 $ 5,238,000 $ (9,958,000 ) $ 592,743,000 Securities with unrealized losses at year-end 2022 2021, Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Description of Securities Value Loss Value Loss Value Loss 2022 U.S. Government agency debt obligations $ 53,019,000 $ 5,713,000 $ 335,725,000 $ 59,379,000 $ 388,744,000 $ 65,092,000 Mortgage-backed securities 31,127,000 6,068,000 12,000 0 31,139,000 6,068,000 Municipal general obligation bonds 97,252,000 4,516,000 32,870,000 4,542,000 130,122,000 9,058,000 Municipal revenue bonds 12,532,000 1,141,000 10,609,000 1,922,000 23,141,000 3,063,000 Other investments 0 0 0 0 0 0 $ 193,930,000 $ 17,438,000 $ 379,216,000 $ 65,843,000 $ 573,146,000 $ 83,281,000 2021 U.S. Government agency debt obligations $ 274,287,000 $ 5,274,000 $ 110,053,000 $ 3,495,000 $ 384,340,000 $ 8,769,000 Mortgage-backed securities 23,184,000 652,000 24,000 0 23,208,000 652,000 Municipal general obligation bonds 40,748,000 392,000 0 0 40,748,000 392,000 Municipal revenue bonds 12,843,000 137,000 414,000 8,000 13,257,000 145,000 Other investments 0 0 0 0 0 0 $ 351,062,000 $ 6,455,000 $ 110,491,000 $ 3,503,000 $ 461,553,000 $ 9,958,000 We evaluate securities in an unrealized loss position at least quarterly. Consideration is given to the financial condition of the issuer, and the intent and ability we have to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. For those debt securities whose fair value is less than their amortized cost basis, we also consider our intent to sell the security, whether it is more likely than not not may At December 31, 2022, December 31, 2021, December 31, 2022, no not not not The amortized cost and fair values of debt securities at December 31, 2022, may may not Weighted Amortized Fair Average Yield Cost Value Due in one year or less 0.76% $ 21,278,000 $ 20,732,000 Due from one to five years 1.22 249,262,000 227,357,000 Due from five to ten years 1.88 318,700,000 271,652,000 Due after ten years 3.03 57,904,000 50,742,000 Mortgage-backed securities 2.10 38,002,000 31,953,000 Other investments 4.94 500,000 500,000 1.72% $ 685,646,000 $ 602,936,000 No securities were sold during the last three Securities issued by the State of Michigan and all its political subdivisions had a combined amortized cost of $193 million and $155 million at December 31, 2022 December 31, 2021, December 31, 2022. December 31, 2021. not 10% The carrying value of U.S. Government agency debt obligations and mortgage-backed securities that are pledged to secure repurchase agreements was $194 million and $197 million at December 31, 2022 2021, may

Note 3 - Loans and Allowance fo

Note 3 - Loans and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	NOTE 3 LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans originated for investment are stated at their principal amount outstanding adjusted for partial charge-offs, the allowance, and net deferred loan fees and costs. Interest income on loans is accrued over the term of the loans primarily using the simple interest method based on the principal balance outstanding. Interest is not Year-end loans disaggregated by class of loan within the loan portfolio segments were as follows: December 31, 2022 December 31, 2021 Percent Increase Balance % Balance % (Decrease) Commercial: Commercial and industrial (1) $ 1,185,083,000 30.3 % $ 1,137,419,000 32.9 % 4.2 % Vacant land, land development, and residential construction 61,873,000 1.6 43,239,000 1.3 43.1 Real estate – owner occupied 639,192,000 16.3 565,758,000 16.4 13.0 Real estate – non-owner occupied 1,033,734,000 26.4 1,027,415,000 29.7 0.6 Real estate – multi-family and residential rental 211,948,000 5.4 176,593,000 5.1 20.0 Total commercial 3,131,830,000 80.0 2,950,424,000 85.4 6.1 Retail: 1-4 family mortgages 755,036,000 19.3 442,547,000 12.8 70.6 Other consumer loans (2) 29,753,000 0.7 60,488,000 1.8 (50.8 ) Total retail 784,789,000 20.0 503,035,000 14.6 56.0 Total loans $ 3,916,619,000 100.0 % $ 3,453,459,000 100.0 % 13.4 % ( 1 For December 31, 2022, December 31, 2021, ( 2 In conjunction with the adoption of the CECL methodology effective January 1, 2022, 1 4 December 31, 2022, 2021, Concentrations within the loan portfolio were as follows at year-end: 2022 2021 Percentage Percentage of of Loan Loan Balance Portfolio Balance Portfolio Commercial real estate loans to lessors of non-residential buildings $ 738,891,000 18.9 % $ 737,589,000 21.4 % Year-end nonperforming loans were as follows: 2022 2021 Loans past due 90 days or more still accruing interest $ 0 $ 155,000 Nonaccrual loans 7,728,000 2,313,000 Total nonperforming loans $ 7,728,000 $ 2,468,000 The recorded principal balance of nonperforming loans was as follows: December 31, 2022 December 31, 2021 Commercial: Commercial and industrial $ 6,024,000 $ 663,000 Vacant land, land development, and residential construction 0 0 Real estate – owner occupied 248,000 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 6,272,000 663,000 Retail: 1-4 family mortgages 1,456,000 1,686,000 Other consumer loans 0 119,000 Total retail 1,456,000 1,805,000 Total nonperforming loans $ 7,728,000 $ 2,468,000 An age analysis of past due loans is as follows as of December 31, 2022: Recorded Greater Balance > 30 59 60 89 Than 89 89 Days Days Days Total Total Days and Past Due Past Due Past Due Past Due Current Loans Accruing Commercial: Commercial and industrial $ 0 $ 5,705,000 $ 249,000 $ 5,954,000 $ 1,179,129,000 $ 1,185,083,000 $ 0 Vacant land, land development, and residential construction 0 0 0 0 61,873,000 61,873,000 0 Real estate – owner occupied 0 248,000 0 248,000 638,944,000 639,192,000 0 Real estate – non-owner occupied 0 0 0 0 1,033,734,000 1,033,734,000 0 Real estate – multi-family and residential rental 0 0 0 0 211,948,000 211,948,000 0 Total commercial 0 5,953,000 249,000 6,202,000 3,125,628,000 3,131,830,000 0 Retail: 1-4 family mortgages 1,334,000 88,000 116,000 1,538,000 753,498,000 755,036,000 0 Other consumer loans 15,000 1,000 0 16,000 29,737,000 29,753,000 0 Total retail 1,349,000 89,000 116,000 1,554,000 783,235,000 784,789,000 0 Total past due loans $ 1,349,000 $ 6,042,000 $ 365,000 $ 7,756,000 $ 3,908,863,000 $ 3,916,619,000 $ 0 An age analysis of past due loans is as follows as of December 31, 2021: Recorded Greater Balance > 30 59 60 89 Than 89 89 Days Days Days Total Total Days and Past Due Past Due Past Due Past Due Current Loans Accruing Commercial: Commercial and industrial $ 14,000 $ 0 $ 193,000 $ 207,000 $ 1,137,212,000 $ 1,137,419,000 $ 155,000 Vacant land, land development, and residential construction 13,000 0 0 13,000 43,226,000 43,239,000 0 Real estate – owner occupied 0 0 0 0 565,758,000 565,758,000 0 Real estate – non-owner occupied 0 0 0 0 1,027,415,000 1,027,415,000 0 Real estate – multi-family and residential rental 0 0 0 0 176,593,000 176,593,000 0 Total commercial 27,000 0 193,000 220,000 2,950,204,000 2,950,424,000 155,000 Retail: Home equity and other 132,000 2,000 20,000 154,000 60,334,000 60,488,000 0 1- 4 family mortgages 1,265,000 241,000 82,000 1,588,000 440,959,000 442,547,000 0 Total retail 1,397,000 243,000 102,000 1,742,000 501,293,000 503,035,000 0 Total past due loans $ 1,424,000 $ 243,000 $ 295,000 $ 1,962,000 $ 3,451,497,000 $ 3,453,459,000 $ 155,000 Collateral dependent loans are loans for which the repayment is expected to be provided substantially through the operation or sale of the collateral and the borrower is experiencing financial difficulty. Identified problem loans, which exhibit characteristics (financial or otherwise) that could cause the loans to become nonperforming or require restructuring in the future, are included on an internal watch list. Senior management and the Board of Directors review this list regularly. Fair value estimates of collateral on distressed lending relationships, as well as on foreclosed and repossessed assets, are reviewed periodically. We also have a process in place to monitor whether value estimates at each quarter-end are reflective of current market conditions. Our credit policies establish criteria for obtaining appraisals and determining internal value estimates. We may may no December 31, 2022. Nonaccrual loans as of December 31, 2022 Recorded Principal Related Balance Allowance With no allowance recorded: Commercial: Commercial and industrial $ 249,000 $ 0 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 249,000 0 Retail: 1-4 family mortgages 1,064,000 0 Other consumer loans 0 0 Total retail 1,064,000 0 Total with no allowance recorded $ 1,313,000 $ 0 With an allowance recorded: Commercial: Commercial and industrial $ 5,775,000 $ 2,051,000 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 248,000 32,000 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 6,023,000 2,083,000 Retail: 1-4 family mortgages 392,000 200,000 Other consumer loans 0 0 Total retail 392,000 200,000 Total with an allowance recorded $ 6,415,000 $ 2,283,000 Total nonaccrual loans: Commercial $ 6,272,000 $ 2,083,000 Retail 1,456,000 200,000 Total nonaccrual loans $ 7,728,000 $ 2,283,000 Impaired loans with no December 31, 2021: Unpaid Contractual Principal Balance Recorded Principal Balance Related Allowance Year-To-Date Average Recorded Principal Balance With no related allowance recorded: Commercial: Commercial and industrial $ 2,893,000 $ 2,818,000 $ 3,632,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 9,674,000 9,674,000 12,634,000 Real estate – non-owner occupied 0 0 131,000 Real estate – multi-family and residential rental 91,000 91,000 37,000 Total commercial 12,658,000 12,583,000 16,434,000 Retail: Home equity and other 1,173,000 1,107,000 1,096,000 1-4 family mortgages 3,166,000 2,025,000 2,327,000 Total retail 4,339,000 3,132,000 3,423,000 Total with no related allowance recorded $ 16,997,000 $ 15,715,000 $ 19,857,000 Impaired loans with an allowance recorded and total impaired loans were as follows as of December 31, 2021: Unpaid Contractual Principal Balance Recorded Principal Balance Related Allowance Year-To-Date Average Recorded Principal Balance With an allowance recorded: Commercial: Commercial and industrial $ 2,192,000 $ 2,192,000 $ 266,000 $ 1,732,000 Vacant land, land development and residential construction 0 0 0 0 Real estate – owner occupied 761,000 761,000 84,000 803,000 Real estate – non-owner occupied 146,000 146,000 4,000 154,000 Real estate – multi-family and residential rental 0 0 0 0 Total commercial 3,099,000 3,099,000 354,000 2,689,000 Retail: Home equity and other 160,000 140,000 123,000 214,000 1-4 family mortgages 412,000 412,000 69,000 537,000 Total retail 572,000 552,000 192,000 751,000 Total with an allowance recorded $ 3,671,000 $ 3,651,000 $ 546,000 $ 3,440,000 Total impaired loans: Commercial $ 15,757,000 $ 15,682,000 $ 354,000 $ 19,123,000 Retail 4,911,000 3,684,000 192,000 4,174,000 Total impaired loans $ 20,668,000 $ 19,366,000 $ 546,000 $ 23,297,000 Impaired commercial loans for which no no 2021. 2021, 2021. Credit Quality Indicators. ten Loans by credit quality indicators were as follows as of December 31, 2022: Commercial credit exposure – credit risk profiled by internal credit risk grades: Commercial and Industrial Commercial Vacant Land, Land Development, and Residential Construction Commercial Real Estate - Owner Occupied Commercial Real Estate - Non-Owner Occupied Commercial Real Estate - Multi-Family and Residential Rental Internal credit risk grade groupings: Grades 1 – 4 (1) $ 719,583,000 $ 41,711,000 $ 406,341,000 $ 447,606,000 $ 118,385,000 Grades 5 – 7 450,405,000 20,057,000 229,766,000 573,728,000 93,514,000 Grades 8 – 9 15,095,000 105,000 3,085,000 12,400,000 49,000 Total commercial $ 1,185,083,000 $ 61,873,000 $ 639,192,000 $ 1,033,734,000 $ 211,948,000 Retail credit exposure – credit risk profiled by collateral type: Retail 1-4 Family Mortgages Retail Other Consumer Loans Performing $ 753,580,000 $ 29,753,000 Nonperforming 1,456,000 0 Total retail $ 755,036,000 $ 29,753,000 ( 1 Included in Commercial and Industrial Loans Grades 1 4 Loans by credit quality indicators were as follows as of December 31, 2021: Commercial credit exposure – credit risk profiled by internal credit risk grades: Commercial and Industrial Commercial Vacant Land, Land Development, and Residential Construction Commercial Real Estate - Owner Occupied Commercial Real Estate - Non-Owner Occupied Commercial Real Estate - Multi-Family and Residential Rental Internal credit risk grade groupings: Grades 1 – 4 (1) $ 729,224,000 $ 28,390,000 $ 346,082,000 $ 503,482,000 $ 119,473,000 Grades 5 – 7 398,378,000 14,730,000 208,060,000 511,280,000 56,968,000 Grades 8 – 9 9,817,000 119,000 11,616,000 12,653,000 152,000 Total commercial $ 1,137,419,000 $ 43,239,000 $ 565,758,000 $ 1,027,415,000 $ 176,593,000 Retail credit exposure – credit risk profiled by collateral type: Retail Home Equity and Other Retail 1-4 Family Mortgages Performing $ 60,369,000 $ 440,861,000 Nonperforming 119,000 1,686,000 Total retail $ 60,488,000 $ 442,547,000 ( 1 Included in Commercial and Industrial Loans Grades 1 4 All commercial loans are graded using the following criteria: Grade 1. “Exceptional” Loans with this rating contain very little, if any, risk. Grade 2. “Outstanding” Loans with this rating have excellent and stable sources of repayment and conform to bank policy and regulatory requirements. Grade 3. “Very Good” Loans with this rating have strong sources of repayment and conform to bank policy and regulatory requirements. These are loans for which repayment risks are acceptable. Grade 4. “Good” Loans with this rating have solid sources of repayment and conform to bank policy and regulatory requirements. These are loans for which repayment risks are modest. Grade 5. “Acceptable” Loans with this rating exhibit acceptable sources of repayment and conform with most bank policies and all regulatory requirements. These are loans for which repayment risks are satisfactory. Grade 6. “Monitor” Loans with this rating are considered to have emerging weaknesses which may Grade 7. “Special Mention” Loans with this rating have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may Grade 8. “Substandard” Loans with this rating are inadequately protected by current sound net worth, paying capacity of the obligor, or of the pledged collateral, if any. A Substandard loan normally has one not Grade 9. “Doubtful” Loans with this rating exhibit all the weaknesses inherent in the Substandard classification and where collection or liquidation in full is highly questionable and improbable. Grade 10. “Loss” Loans with this rating are considered uncollectable, and of such little value that continuance as an active asset is not The primary risk elements with respect to commercial loans are the financial condition of the borrower, the sufficiency of collateral, and timeliness of scheduled payments. We have a policy of requesting and reviewing periodic financial statements from commercial loan customers and employ a disciplined and formalized review of the existence of collateral and its value. The primary risk element with respect to each residential real estate loan and consumer loan is the timeliness of scheduled payments; loans 90 The following table reflects loan balances as of December 31, 2022 2022 2021 2020 2019 2018 Prior Term Total Revolving Loans Grand Total Commercial: Commercial and Industrial: Grades 1 – 4 $ 115,494 $ 141,481 $ 43,961 $ 9,194 $ 3,230 $ 9,851 $ 323,211 $ 396,372 $ 719,583 Grades 5 – 7 151,783 47,030 31,697 8,870 569 93 240,042 210,363 450,405 Grades 8 – 9 3,784 249 0 0 48 29 4,110 10,985 15,095 Total $ 271,061 $ 188,760 $ 75,658 $ 18,064 $ 3,847 $ 9,973 $ 567,363 $ 617,720 $ 1,185,083 Vacant Land, Land Development and Residential Construction: Grades 1 – 4 $ 31,756 $ 6,196 $ 3,428 $ 0 $ 0 $ 331 $ 41,711 $ 0 $ 41,711 Grades 5 – 7 10,270 8,760 351 50 0 626 20,057 0 20,057 Grades 8 – 9 0 0 0 0 14 91 105 0 105 Total $ 42,026 $ 14,956 $ 3,779 $ 50 $ 14 $ 1,048 $ 61,873 $ 0 $ 61,873 Real Estate – Owner Occupied: Grades 1 – 4 $ 194,072 $ 113,528 $ 53,630 $ 19,670 $ 19,279 $ 6,162 $ 406,341 $ 0 $ 406,341 Grades 5 – 7 115,720 56,173 33,913 10,245 12,550 1,165 229,766 0 229,766 Grades 8 – 9 2,919 0 44 0 122 0 3,085 0 3,085 Total $ 312,711 $ 169,701 $ 87,587 $ 29,915 $ 31,951 $ 7,327 $ 639,192 $ 0 $ 639,192 Real Estate – Non-Owner Occupied: Grades 1 – 4 $ 129,153 $ 163,035 $ 89,125 $ 44,196 $ 10,079 $ 12,018 $ 447,606 $ 0 $ 447,606 Grades 5 – 7 183,388 164,334 139,951 35,200 13,456 37,399 573,728 0 573,728 Grades 8 – 9 6,712 5,688 0 0 0 0 12,400 0 12,400 Total $ 319,253 $ 333,057 $ 229,076 $ 79,396 $ 23,535 $ 49,417 $ 1,033,734 $ 0 $ 1,033,734 Real Estate – Multi-Family and Residential Rental: Grades 1 – 4 $ 31,470 $ 38,176 $ 36,348 $ 5,306 $ 3,082 $ 4,003 $ 118,385 $ 0 $ 118,385 Grades 5 – 7 48,847 25,786 12,879 3,162 2,557 283 93,514 0 93,514 Grades 8 – 9 0 0 0 0 0 49 49 0 49 Total $ 80,317 $ 63,962 $ 49,227 $ 8,468 $ 5,639 $ 4,335 $ 211,948 $ 0 $ 211,948 Total Commercial $ 1,025,368 $ 770,436 $ 445,327 $ 135,893 $ 64,986 $ 72,100 $ 2,514,110 $ 617,720 $ 3,131,830 2022 2021 2020 2019 2018 Prior Term Total Revolving Loans Grand Total Retail: 1-4 Family Mortgages: Performing $ 313,611 $ 242,950 $ 91,936 $ 12,094 $ 14,297 $ 41,622 $ 716,510 $ 37,070 $ 753,580 Nonperforming 142 82 0 0 203 1,029 1,456 0 1,456 Total $ 313,753 $ 243,032 $ 91,936 $ 12,094 $ 14,500 $ 42,651 $ 717,966 $ 37,070 $ 755,036 Other Consumer Loans: Performing $ 4,349 $ 2,870 $ 1,040 $ 1,074 $ 395 $ 430 $ 10,158 $ 19,595 $ 29,753 Nonperforming 0 0 0 0 0 0 0 0 0 Total $ 4,349 $ 2,870 $ 1,040 $ 1,074 $ 395 $ 430 $ 10,158 $ 19,595 $ 29,753 Total Retail $ 318,102 $ 245,902 $ 92,976 $ 13,168 $ 14,895 $ 43,081 $ 728,124 $ 56,665 $ 784,789 Grand Total $ 1,343,470 $ 1,016,338 $ 538,303 $ 149,061 $ 79,881 $ 115,181 $ 3,242,234 $ 674,385 $ 3,916,619 The allowance for credit losses for the year-ended December 31, 2022 Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non-owner occupied Commercial real estate multi-family and residential rental 1-4 family mortgages Other consumer loans Unallocated Total Allowance for credit losses: Beginning balance $ 10,782 $ 420 $ 6,045 $ 13,301 $ 1,695 $ 2,449 $ 626 $ 45 $ 35,363 Adoption of ASU 2016-13 (1,571 ) (43 ) (560 ) (2,534 ) (621 ) 5,395 (411 ) (55 ) (400 ) Provision for credit losses 946 138 378 (603 ) 152 5,621 (111 ) 29 6,550 Charge-offs (171 ) (29 ) (38 ) 0 0 (33 ) (21 ) 0 (292 ) Recoveries 217 4 89 0 43 595 77 0 1,025 Ending balance $ 10,203 $ 490 $ 5,914 $ 10,164 $ 1,269 $ 14,027 $ 160 $ 19 $ 42,246 The allowance for loan losses and recorded investments in loans for the year-ended December 31, 2021 Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non- owner occupied Commercial real estate multi-family and residential rental Home equity and other 1 4 family mortgages Unallocated Total Allowance for loan losses: Beginning balance $ 9,424 $ 679 $ 8,246 $ 13,611 $ 1,819 $ 889 $ 3,240 $ 59 $ 37,967 Provision for loan losses 2,030 (618 ) (3,308 ) (310 ) (150 ) (301 ) (1,629 ) (14 ) (4,300 ) Charge-offs (882 ) (15 ) (12 ) 0 0 (43 ) (92 ) 0 (1,044 ) Recoveries 210 374 1,119 0 26 81 930 0 2,740 Ending balance $ 10,782 $ 420 $ 6,045 $ 13,301 $ 1,695 $ 626 $ 2,449 $ 45 $ 35,363 Ending balance: individually evaluated for impairment $ 266 $ 0 $ 84 $ 0 $ 4 $ 123 $ 69 $ 0 $ 546 Ending balance: collectively evaluated for impairment $ 10,516 $ 420 $ 5,961 $ 13,301 $ 1,691 $ 503 $ 2,380 $ 45 $ 34,817 Total loans (*): Ending balance $ 1,097,309 $ 43,239 $ 565,758 $ 1,027,415 $ 176,593 $ 60,488 $ 442,547 $ 3,413,349 Ending balance: individually evaluated for impairment $ 5,010 $ 0 $ 10,435 $ 146 $ 91 $ 1,247 $ 2,437 $ 19,366 Ending balance: collectively evaluated for impairment $ 1,092,299 $ 43,239 $ 555,323 $ 1,027,269 $ 176,502 $ 59,241 $ 440,110 $ 3,393,983 (*) Excludes $40.1 The allowance for loan losses and recorded investments in loans for the year-ended December 31, 2020 Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non- owner occupied Commercial real estate multi-family and residential rental Home equity and other 1 4 family mortgages Unallocated Total Allowance for loan losses: Beginning balance $ 6,659 $ 466 $ 6,291 $ 6,761 $ 893 $ 861 1,888 $ 70 $ 23,889 Provision for loan losses 2,921 289 1,881 6,837 907 58 1,168 (11 ) 14,050 Charge-offs (247 ) (113 ) (235 ) 0 (18 ) (96 ) (129 ) 0 (838 ) Recoveries 91 37 309 13 37 66 313 0 866 Ending balance $ 9,424 $ 679 $ 8,246 $ 13,611 $ 1,819 $ 889 $ 3,240 $ 59 $ 37,967 Ending balance: individually evaluated for impairment $ 53 $ 0 $ 77 $ 8 $ 0 $ 241 $ 172 $ 0 $ 551 Ending balance: collectively evaluated for impairment $ 9,371 $ 679 $ 8,169 $ 13,603 $ 1,819 $ 648 $ 3,068 $ 59 $ 37,416 Total loans (*): Ending balance $ 780,164 $ 55,055 $ 529,953 $ 917,436 $ 146,095 $ 61,620 $ 337,888 $ 2,828,211 Ending balance: individually evaluated for impairment $ 6,585 $ 0 $ 15,327 $ 503 $ 0 $ 1,270 $ 3,273 $ 26,958 Ending balance: collectively evaluated for impairment $ 773,579 $ 55,055 $ 514,626 $ 916,933 $ 146,095 $ 60,350 $ 334,615 $ 2,801,253 (*) Excludes $365 million in loans originated under the Paycheck Protection Program. Loans modified as troubled debt restructurings generally reflect payment extensions and below market interest rates. Loans modified as troubled debt restructurings during the year-ended December 31, 2022 Pre- Post- Modification Modification Recorded Recorded Number of Principal Principal Contracts Balance Balance Commercial: Commercial and industrial 3 $ 6,593,000 $ 6,593,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 0 0 0 Real estate – non-owner occupied 0 0 0 Real estate – multi-family and residential rental 0 0 0 Total commercial 3 6,593,000 6,593,000 Retail: Home equity and other 0 0 0 1-4 family mortgages 7 758,000 757,000 Total retail 7 758,000 757,000 Total 10 $ 7,351,000 $ 7,350,000 Loans modified as troubled debt restructurings during the year-ended December 31, 2021 Pre- Post- Modification Modification Recorded Recorded Number of Principal Principal Contracts Balance Balance Commercial: Commercial and industrial 10 $ 3,017,000 $ 3,016,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 1 692,000 692,000 Real estate – non-owner occupied 0 0 0 Real estate – multi-family and residential rental 1 93,000 93,000 Total commercial 12 3,802,000 3,801,000 Retail: Home equity and other 4 485,000 482,000 1-4 family mortgages 2 46,000 46,000 Total retail 6 531,000 528,000 Total 18 $ 4,333,000 $ 4,329,000 The following loans, modified as troubled debt restructurings within the previous twelve 30 December 31, 2022 ( Number of Contracts Recorded Principal Balance Commercial: Commercial and industrial 2 $ 5,665,000 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 2 5,665,000 Retail: Home equity and other 0 0 1-4 family mortgages 0 0 Total retail 0 0 Total 2 $ 5,665,000 The following loans, modified as troubled debt restructurings within the previous twelve 30 December 31, 2021 ( Number of Contracts Recorded Principal Balance Commercial: Commercial and industrial 0 $ 0 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 0 0 Retail: Home equity and other 0 0 1-4 family mortgages 0 0 Total retail 0 0 Total 0 $ 0 Activity for loans categorized as troubled debt restructurings during the year-ended December 31, 2022 Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 4,973,000 $ 0 $ 10,435,000 $ 146,000 $ 91,000 Charge-Offs (95,000 ) 0 (39,000 ) 0 0 Payments (772,000 ) 0 (9,683,000 ) (16,000 ) (91,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 4,566,000 0 (669,000 ) 0 0 Ending Balance $ 8,672,000 $ 0 $ 44,000 $ 130,000 $ 0 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,202,000 $ 627,000 Charge-Offs 0 0 Payments (14,000 ) (317,000 ) Transfers to ORE 0 0 Net Additions/Deletions (1) (1,187,000 ) 2,426,000 Ending Balance $ 1,000 $ 2,736,000 ( 1 Includes $1.2 million in the transfer of home equity lines of credit from other consumer loans to 1 4 January 1, 2022. Activity for loans categorized as troubled debt restructurings during the year-ended December 31, 2021 Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 6,414,000 $ 0 $ 14,797,000 $ 480,000 $ 0 Charge-Offs (17,000 ) 0 0 0 0 Payments (4,278,000 ) 0 (5,048,000 ) (334,000 ) (1,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 2,854,000 0 686,000 0 92,000 Ending Balance $ 4,973,000 $ 0 $ 10,435,000 $ 146,000 $ 91,000 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,146,000 $ 806,000 Charge-Offs 0 0 Payments (426,000 ) (224,000 ) Transfers to ORE 0 0 Net Additions/Deletions 482,000 45,000 Ending Balance $ 1,202,000 $ 627,000 Activity for loans categorized as troubled debt restructurings during the year-ended December 31, 2020 Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 8,587,000 $ 85,000 $ 1,145,000 $ 178,000 $ 7,000 Charge-Offs 0 0 0 0 0 Payments (11,260,000 ) (85,000 ) (3,765,000 ) (585,000 ) (7,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 9,087,000 0 17,417,000 887,000 0 Ending Balance $ 6,414,000 $ 0 $ 14,797,000 $ 480,000 $ 0 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,415,000 $ 724,000 Charge-Offs 0 0 Payments (881,000 ) (68,000 ) Transfers to ORE 0 0 Net Additions/Deletions 612,000 150,000 Ending Balance $ 1,146,000 $ 806,000

Note 4 - Premises and Equipment

Note 4 - Premises and Equipment, Net	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	NOTE 4 Year-end premises and equipment were as follows: 2022 2021 Land and improvements $ 13,532,000 $ 15,111,000 Buildings 53,865,000 56,168,000 Furniture and equipment 22,941,000 22,974,000 90,338,000 94,253,000 Less: accumulated depreciation 38,862,000 36,955,000 Total premises and equipment $ 51,476,000 $ 57,298,000 Depreciation expense totaled $6.0 million in 2022, 2021, 2020. We enter into facility leases in the normal course of business. As of December 31, 2022, eleven June, 2023 December, 2029, December 31, 2022. three five not not Leases are classified as either operating or finance leases at the lease commencement date, with all of our current leases determined to be operating leases. Lease expense for operating leases is recognized on a straight-line basis over the lease term. Right-of-use assets represent our right to use an underlying asset for the lease term, while lease liabilities represent our obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized at the lease commencement date at the estimated present value of lease payments over the lease term. We use our incremental borrowing rate, on a collateralized basis, at lease commencement to calculate the present value of lease payments. The weighted average discount rate for leases was 5.47% as of December 31, 2022. The right-of-use assets, included in premises and equipment, net on our Consolidated Balance Sheets, and the lease liabilities, included in other liabilities on our Consolidated Balance Sheets, totaled $3.5 million as of December 31, 2022, December 31, 2021, not twelve 2022, 2021 2020, Future lease payments were as follows as of December 31, 2022: 2023 $ 1,091,000 2024 883,000 2025 443,000 2026 339,000 2027 288,000 Thereafter 1,589,000 Total undiscounted lease payments 4,633,000 Less effect of discounting (1,118,000 ) Present value of future lease payments (lease liability) 3,515,000

Note 5 - Mortgage Loan Servicin

Note 5 - Mortgage Loan Servicing	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Mortgage Loan Servicing [Text Block]	NOTE 5 MORTGAGE LOAN SERVICING Mortgage loans serviced for others are not 2022 2021 Mortgage loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 1,345,312,000 $ 1,320,550,000 Federal Home Loan Bank 30,831,000 23,505,000 Total mortgage loans serviced for others $ 1,376,143,000 $ 1,344,055,000 Custodial escrow balances, which are reported as deposits on the Consolidated Balance Sheets, maintained in connection with serviced loans were $11.6 million and $12.1 million as of December 31, 2022 December 31, 2021, Activity for capitalized mortgage loan servicing rights, which are reported as other assets on the Consolidated Balance Sheets, during 2022 2021 2022 2021 Balance at beginning of year $ 12,248,000 $ 8,189,000 Additions 2,773,000 7,711,000 Amortized to expense (3,184,000 ) (3,652,000 ) Balance at end of year $ 11,837,000 $ 12,248,000 Mortgage servicing rights result from our mortgage loan origination activities. Late and ancillary fees, included as part of mortgage banking income and reported as noninterest income in the Consolidated Statements of Income, aggregated less than $0.1 million during 2022 2021. Accounting for mortgage servicing rights is based on the class of mortgage servicing rights. We have identified four 10 15 20 30 Interest rate risk, prepayment risk and default risk are inherent in mortgage servicing rights valuation. Interest rate changes largely drive prepayment rates. Refinance activity generally increases as interest rates decline. A significant decrease in interest rates beyond expectation could cause a decline in the value of mortgage servicing rights. On the contrary, borrowers are less likely to refinance or prepay their mortgage loans if interest rates increase, which would extend the duration of the underlying mortgage loans and the associated mortgage servicing rights would likely rise. Because of these risks, discount rates and prepayment speeds are used to estimate the fair value of mortgage servicing rights. We determined that no valuation allowance was necessary as of December 31, 2022 December 31, 2021. December 31, 2022 December 31, 2021, 2022, 2021, The weighted average amortization period was 8.9 years and 8.5 years as of December 31, 2022 December 31, 2021, December 31, 2022 2023 $ 2,366,000 2024 2,066,000 2025 1,772,000 2026 1,492,000 2027 1,236,000 Thereafter 2,905,000

Note 6 - Core Deposit Intangibl

Note 6 - Core Deposit Intangible Asset, Net	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	NOTE 6 CORE DEPOSIT INTANGIBLE ASSET, NET The gross carrying amount of core deposit intangible assets, included in other assets on our Consolidated Balance Sheets, totaled $ 17.5 December 31, 2022 December 31, 2021. December 31, 2022, December 31, 2021, The scheduled amortization expense on core deposit intangible assets in future periods is: 2023 $ 450,000 2024 133,000

Note 7 - Deposits

Note 7 - Deposits	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	NOTE 7 DEPOSITS Deposits at year-end are summarized as follows: December 31, 2022 December 31, 2021 Percent Increase Balance % Balance % (Decrease) Noninterest-bearing checking $ 1,604,750,000 43.2 % $ 1,677,952,000 41.1 % (4.4 %) Interest-bearing checking 575,028,000 15.5 538,838,000 13.2 6.7 Money market 776,723,000 20.9 1,040,176,000 25.5 (25.3 ) Savings 381,602,000 10.3 394,330,000 9.7 (3.2 ) Time, under $100,000 113,099,000 3.0 132,776,000 3.2 (14.8 ) Time, $100,000 and over 261,609,000 7.1 275,208,000 6.7 (4.9 ) Total local deposits 3,712,811,000 100.0 4,059,280,000 99.4 (8.5 ) Out-of-area time, $100,000 and over 0 0.0 23,913,000 0.6 (100.0 ) Total deposits $ 3,712,811,000 100.0 % $ 4,083,193,000 100.0 % (9.1 %) Out-of-area time deposits consist of deposits obtained from depositors outside of our primary market areas exclusively through deposit brokers. The following table depicts the maturity distribution for time deposits at year-end: 2022 2021 In one year or less $ 188,887,000 $ 260,501,000 In one to two years 68,434,000 78,024,000 In two to three years 22,053,000 34,595,000 In three to four years 30,761,000 7,863,000 In four to five years 64,573,000 50,914,000 Total certificates of deposit $ 374,708,000 $ 431,897,000 The following table depicts the maturity distribution for time deposits with balances of $100,000 2022 2021 Up to three months $ 40,538,000 $ 68,887,000 Three months to six months 25,141,000 53,077,000 Six months to twelve months 54,394,000 56,612,000 Over twelve months 141,536,000 120,545,000 Total certificates of deposit $ 261,609,000 $ 299,121,000 Total time deposits of more than $250,000 2022 2021, Deposit overdrafts, which are reported as loans on the Consolidated Balance Sheets, totaled $0.9 million and $0.1 million as of December 31, 2022 December 31, 2021,

Note 8 - Securities Sold Under

Note 8 - Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	NOTE 8 SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Information regarding securities sold under agreements to repurchase at year-end is summarized below: 2022 2021 Outstanding balance at year-end $ 194,340,000 $ 197,463,000 Weighted average interest rate at year-end 0.75 % 0.11 % Average daily balance during the year $ 200,499,000 $ 158,855,000 Weighted average interest rate during the year 0.15 % 0.11 % Maximum daily balance during the year $ 235,577,000 $ 209,093,000 Securities sold under agreements to repurchase (“repurchase agreements”) generally have original maturities of less than one

Note 9 - Federal Home Loan Bank

Note 9 - Federal Home Loan Bank of Indianapolis Advances	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Federal Home Loan Bank Advances, Disclosure [Text Block]	NOTE 9 Federal Home Loan Bank of Indianapolis (“FHLBI”) bullet advances totaled $280 million at December 31, 2022, January 2023 June 2027, December 31, 2021, January 2022 June 2027, Maturities of FHLBI bullet advances as of December 31, 2022 2023 $ 80,000,000 2024 80,000,000 2025 50,000,000 2026 30,000,000 2027 40,000,000 FHLBI amortizing advances totaled $28.3 million as of December 31, 2022, 2042. no December 31, 2021. Scheduled principal payments on FHLBI amortizing advances as of December 31, 2022 2023 $ 353,000 2024 826,000 2025 862,000 2026 899,000 2027 938,000 Thereafter 24,385,000 Each advance is payable at its maturity date, and is subject to a prepayment fee if paid prior to the maturity date. The advances are collateralized by residential mortgage loans, first first December 31, 2022

Note 10 - Federal Income Taxes

Note 10 - Federal Income Taxes	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 10 The consolidated income tax expense is as follows: 2022 2021 2020 Current expense $ 16,080,000 $ 12,675,000 $ 14,945,000 Deferred expense (1,353,000 ) 2,020,000 (4,141,000 ) Change in valuation allowance 0 0 (94,000 ) Tax expense $ 14,727,000 $ 14,695,000 $ 10,710,000 A reconciliation of the differences between the federal income tax expense recorded and the amount computed by applying the federal statutory rate to income before income taxes is as follows: 2022 2021 2020 Tax at statutory rate $ 15,915,000 $ 15,481,000 $ 11,518,000 Increase (decrease) from Tax-exempt interest (695,000 ) (658,000 ) (681,000 ) Bank owned life insurance (334,000 ) (233,000 ) (238,000 ) Change in valuation allowance 0 0 (94,000 ) Other (159,000 ) 105,000 205,000 Tax expense $ 14,727,000 $ 14,695,000 $ 10,710,000 The statutory tax rate was 21% for 2022, 2021 2020. Significant components of deferred tax assets and liabilities, included in other assets on our Consolidated Balance Sheets, as of December 31, 2022 2021 2022 2021 Deferred income tax assets Allowance for credit losses $ 8,872,000 $ 7,426,000 Deferred compensation 232,000 259,000 Stock compensation 1,018,000 941,000 Nonaccrual loan interest income 136,000 159,000 Unrealized loss on securities 17,369,000 991,000 Lease liability 810,000 749,000 Deferred loan fees and costs 0 520,000 Other 494,000 595,000 Deferred tax asset 28,931,000 11,640,000 Deferred income tax liabilities Depreciation 697,000 1,168,000 Prepaid expenses 504,000 416,000 Core deposit intangible 120,000 276,000 Mortgage loan servicing rights 2,486,000 2,572,000 Deferred loan fees and costs 211,000 0 Right of use lease asset 810,000 749,000 Business combination adjustments 1,877,000 2,013,000 Other 326,000 193,000 Deferred tax liability 7,031,000 7,387,000 Total net deferred tax asset $ 21,900,000 $ 4,253,000 A valuation allowance related to deferred tax assets is required when it is considered more likely than not not no 2022 2021. 2022 2021 not 2023. 2022 2021. no 2019.

Note 11 - Stock-based Compensat

Note 11 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	NOTE 11 STOCK-BASED COMPENSATION Stock-based compensation plans are used to provide directors and employees with an increased incentive to contribute to our long-term performance and growth, to align the interests of directors and employees with the interests of our shareholders through the opportunity for increased stock ownership and to attract and retain directors and employees. During 2015, 2006. 2016 2016. 2016 2019, 2016. 2020 2022, 2020. 2016 2019 2016, 2020 2022 2020. The Stock Incentive Plan of 2006 January 18, 2016, 2016 May, 2016. 2016 2020 May, 2020. Under the Stock Incentive Plan of 2006, 2016 2020, may not not No 2016 2022 three 2018 2022, 2014, two seven 2022, A summary of restricted stock activity from grants issued during the past three 2022 2021 2020 Shares Weighted Average Fair Value Shares Weighted Average Fair Value Shares Weighted Average Fair Value Nonvested at beginning of year 353,691 $ 30.71 262,336 $ 29.42 262,260 $ 34.91 Granted 121,631 32.18 163,000 33.68 121,518 24.65 Vested (94,010 ) 34.86 (59,772 ) 31.82 (85,445 ) 37.08 Forfeited (6,541 ) 27.98 (11,873 ) 29.54 (35,997 ) 33.71 Nonvested at end of year 374,771 $ 30.49 353,691 $ 30.71 262,336 $ 29.42 Of the restricted stock shares granted in 2022, 2021 2020, 2022, 2021, 2020 2019, 2021, 2020, 2019 2018, 2020, 2019 2018, three A summary of stock option activity during the past three 2022 2021 2020 Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Outstanding at beginning of year 7,700 $ 34.89 9,700 $ 32.83 10,700 $ 30.25 Granted 0 NA 0 NA 0 NA Exercised (2,700 ) 32.42 (2,000 ) 24.91 (1,000 ) 5.19 Forfeited or expired 0 NA 0 NA 0 NA Outstanding at end of year 5,000 $ 36.22 7,700 $ 34.89 9,700 $ 32.83 Options exercisable at year-end 5,000 $ 36.22 7,700 $ 34.89 9,700 $ 32.83 The fair value of each stock option award is estimated on the date of grant using a closed option valuation (Black-Scholes) model that uses the assumptions noted in the table below. Expected volatilities are based on historical volatilities on our common stock. Historical data is used to estimate stock option expense and post-vesting termination behavior. The expected term of stock options granted is based on historical data and represents the period of time that stock options granted are expected to be outstanding, which takes into account that the stock options are not three Options at year-end 2022 Outstanding Exercisable Weighted Average Weighted Weighted Range of Remaining Average Average Exercise Contractual Exercise Exercise Prices Number Life (Years) Price Number Price $36.00 - $37.00 5,000 0.9 $ 36.22 5,000 $ 36.22 Outstanding at year end 5,000 0.9 $ 36.22 5,000 $ 36.22 Information related to options outstanding at year-end 2022, 2021 2020 2022 2021 2020 Minimum exercise price $ 36.22 $ 27.66 $ 22.15 Maximum exercise price 36.22 36.22 36.22 Average remaining option term (years) 0.9 1.7 2.4 Information related to stock option grants and exercises during 2022, 2021 2020 2022 2021 2020 Aggregate intrinsic value of stock options exercised $ 16,000 $ 13,000 $ 17,000 Cash received from stock option exercises 36,000 50,000 3,000 Tax benefit realized from stock option exercises 0 0 0 Weighted average per share fair value of stock options granted NA NA NA No December 31, 2022 On May 23, 2019, June 1, 2019 May 31, 2020. twelve June 1, 2020, June 1, 2020 May 31, 2021. twelve August 27, 2020, September 1, 2020 May 31, 2021. nine May 27, 2021, June 1, 2021 May 31, 2022. twelve May 26, 2022, June 1, 2022 May 31, 2023. twelve June 9, 2022, June 1, 2022 May 31, 2023. twelve November 25, 2022, November 1, 2022 May 31, 2023. seven Stock-based compensation, reported as noninterest expense in the Consolidated Statements of Income, totaled $3.4 million, $3.8 million and $2.3 million in 2022, 2021 2020,

Note 12 - Related Parties

Note 12 - Related Parties	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	NOTE 12 RELATED PARTIES Certain directors and executive officers of our bank, including their immediate families and companies in which they are principal owners, were loan customers of our bank. At year-end 2022 2021, 2022 2021, 2022 2021 Beginning balance $ 87,672,000 $ 108,042,000 New loans 10,619,000 2,542,000 Repayments (5,631,000 ) (22,912,000 ) Ending balance $ 92,660,000 $ 87,672,000 Related party deposits and repurchase agreements totaled $21.5 million and $18.4 million at year-end 2022 2021,

Note 13 - Commitments and Off-b

Note 13 - Commitments and Off-balance-sheet Risk	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Commitments Contingencies and Guarantees [Text Block]	NOTE 13 COMMITMENTS AND OFF-BALANCE-SHEET RISK We are a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit and standby letters of credit. Loan commitments to extend credit are agreements to lend to a customer as long as there is no third may not These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized, if any, in the balance sheet. Our maximum exposure to loan loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. We use the same credit policies in making commitments and conditional obligations as we do for on-balance sheet instruments. Collateral, such as accounts receivable, securities, inventory, and property and equipment, is generally obtained based on management’s credit assessment of the borrower. We are required to consider expected credit losses associated with loan commitments over the contractual period in which we are exposed to credit risk on the underlying commitments unless the obligation is unconditionally cancellable by us. Any allowance for off-balance sheet credit exposures is reported as an other liability on our Consolidated Balance Sheet and is increased or decreased via other noninterest expense on our Consolidated Statement of Income. The calculation includes consideration of the likelihood that funding will occur and forecasted credit losses on commitments expected to be funded over their estimated lives. The allowance is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to be funded. For commercial lines of credit, retail lines of credit and credit card average outstanding balances, we determined allowance requirements by calculating the difference between the average percent outstanding of the funded commitments over the past several years to actual percent outstanding as of December 31, 2022 December 31, 2022. not one At year-end 2022 2021, Our maximum exposure to credit losses for loan commitments and standby letters of credit outstanding at year-end was as follows: 2022 2021 Commercial unused lines of credit $ 1,283,703,000 $ 1,098,951,000 Unused lines of credit secured by 1 – 4 family residential properties 71,972,000 64,313,000 Credit card unused lines of credit 123,687,000 92,146,000 Other consumer unused lines of credit 75,747,000 64,876,000 Commitments to make loans 329,646,000 212,476,000 Standby letters of credit 23,539,000 33,109,000 Total commitments $ 1,908,294,000 $ 1,565,871,000 Commitments to make commercial loans generally reflect our binding obligations to existing and prospective customers to extend credit, including line of credit facilities secured by accounts receivable and inventory, and term debt secured by either real estate or equipment. In most instances, commercial line of credit facilities have a term ranging from 12 to 24 months with a floating rate tied to the Wall Street Journal Prime Rate, 30 30 30 30 fourth 2020, not $2.5 $2.5 five 30 30 three seven January 1, 2022, 30 30 30 June 30, 2023 December 31, 2022, 30 The following standby letters of credit are considered financial guarantees under current accounting guidance. These instruments are carried at fair value as an other liability on our Consolidated Balance Sheets. Standby letters of credit are generally cross collateralized with the borrowers’ other loans with us, and are included in our borrower collateral analyses. 2022 2021 Contract Carrying Contract Carrying Amount Value Amount Value Standby letters of credit $ 23,539,000 $ 108,000 $ 33,109,000 $ 212,000

Note 14 - Benefit Plans

Note 14 - Benefit Plans	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Retirement Benefits [Text Block]	NOTE 14 BENEFIT PLANS We have a 401 401 April 1, 2018. 2022, 2021 2020 401 We have a deferred compensation plan in which all persons serving on the Board of Directors may may December 31, 2022 2021, 2022 2021, 2020. The Mercantile Bank Corporation Employee Stock Purchase Plan of 2014 may may 2022 2021, December 31, 2022,

Note 15 - Derivatives and Hedgi

Note 15 - Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	NOTE 15 DERIVATIVES AND HEDGING ACTIVITIES We are exposed to certain risks arising from both business operations and economic conditions. We principally manage the exposure to a wide variety of operational risks through core business activities. Economic risks, including interest rate, liquidity and credit risk, are primarily administered via the amount, sources and duration of assets and liabilities. Derivative financial instruments may Derivatives not not As the interest rate swaps associated with this program do not MERCANTILE BANK CORPORATION NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2022 NOTE 15 DERIVATIVES AND HEDGING ACTIVITIES The fair values of derivative instruments as of December 31, 2022, Notional Amount Balance Sheet Location Fair Value Derivative Assets Interest rate swaps $ 401,572,000 Other Assets $ 25,697,000 Derivative Liabilities Interest rate swaps 401,572,000 Other Liabilities 25,900,000 The effect of interest rate swaps that are not December 31, 2022 December 31, 2022. not December 31, 2022, not December 31, 2022, not $250,000. December 31, 2022. The fair values of derivative instruments as of December 31, 2021, Notional Amount Balance Sheet Location Fair Value Derivative Assets Interest rate swaps $ 279,419,000 Other Assets $ 4,609,000 Derivative Liabilities Interest rate swaps 279,419,000 Other Liabilities 4,857,000 MERCANTILE BANK CORPORATION NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2022 NOTE 15 DERIVATIVES AND HEDGING ACTIVITIES The effect of interest rate swaps that are not December 31, 2021 December 31, 2021. December 31, 2021, not December 31, 2021, not December 31, 2021. MERCANTILE BANK CORPORATION NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2022

Note 16 - Fair Values of Financ

Note 16 - Fair Values of Financial Instruments	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 16 FAIR VALUES OF FINANCIAL INSTRUMENTS Carrying amount, estimated fair value and level within the fair value hierarchy of financial instruments were as follows at year-end (dollars in thousands): Level in 2022 2021 Fair Value Carrying Fair Carrying Fair Hierarchy Amount Value Amount Value Financial assets Cash and cash equivalents Level 1 $ 96,772 $ 96,772 $ 975,160 $ 975,160 Securities available for sale (1) 602,936 602,936 592,743 592,743 Federal Home Loan Bank stock (2) 17,721 17,721 18,002 18,002 Loans, net Level 3 3,874,373 3,800,042 3,418,096 3,498,345 Mortgage loans held for sale Level 2 3,565 3,643 16,117 16,707 Mortgage servicing rights Level 3 11,837 17,727 12,248 15,445 Accrued interest receivable Level 2 15,476 15,476 9,311 9,311 Interest rate swaps Level 2 25,697 25,697 4,609 4,609 Financial liabilities Deposits Level 2 3,712,811 3,379,403 4,083,193 4,028,249 Securities sold under agreements to repurchase Level 2 194,340 194,340 197,463 197,463 Federal Home Loan Bank advances Level 2 308,263 292,044 374,000 384,927 Subordinated debentures Level 2 48,958 49,531 48,244 48,284 Subordinated notes Level 2 88,628 75,024 73,646 73,646 Accrued interest payable Level 2 3,223 3,223 1,393 1,393 Interest rate swaps Level 2 25,900 25,900 4,857 4,857 ( 1 See Note 17 ( 2 It is not Carrying amount is the estimated fair value for cash and cash equivalents, FHLBI stock, accrued interest receivable and payable, noninterest-bearing checking accounts and securities sold under agreements to repurchase. Security fair values are based on market prices or dealer quotes, and if no 2016 01, MERCANTILE BANK CORPORATION NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2022

Note 17 - Fair Value Measuremen

Note 17 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]	NOTE 17 FAIR VALUE MEASUREMENTS 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. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability, or in the absence of a principal market, the most advantageous market for the asset or liability. The price of the principal (or most advantageous) market used to measure the fair value of the asset or liability is not not We are required to use valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may Level 1: Level 2: 1 not Level 3: The following is a description of our valuation methodologies used to measure and disclose the fair values of our financial assets and liabilities on a recurring or nonrecurring basis: Securities available for sale. not 2 3 December 31, 2022 2021. 1 Derivatives. Mortgage loans held for sale. December 31, 2022 2021, Loans. not Foreclosed assets. Assets and Liabilities Measured at Fair Value on a Recurring Basi The balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2022 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Government agency debt obligations $ 388,744,000 $ 0 $ 388,744,000 $ 0 Mortgage-backed securities 31,953,000 0 31,953,000 0 Municipal general obligation bonds 154,433,000 0 153,855,000 578,000 Municipal revenue bonds 27,306,000 0 27,306,000 0 Other investments 500,000 0 500,000 0 Interest rate swaps 25,697,000 0 25,697,000 0 Total assets $ 628,633,000 $ 0 $ 628,055,000 $ 578,000 Interest rate swaps 25,900,000 0 25,900,000 0 Total liabilities $ 25,900,000 $ 0 $ 25,900,000 $ 0 There were no 3 2022. 3 2022 The balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2021 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Government agency debt obligations $ 390,371,000 $ 0 $ 390,371,000 $ 0 Mortgage-backed securities 41,803,000 0 41,803,000 0 Municipal general obligation bonds 137,594,000 0 136,917,000 677,000 Municipal revenue bonds 22,475,000 0 22,475,000 0 Other investments 500,000 0 500,000 0 Interest rate swaps 4,609,000 0 4,609,000 0 Total assets $ 597,352,000 $ 0 $ 596,675,000 $ 677,000 Interest rate swaps 4,857,000 0 4,857,000 0 Total liabilities $ 4,857,000 $ 0 $ 4,857,000 $ 0 There were no 3 2021. 3 2021 Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The balances of assets and liabilities measured at fair value on a nonrecurring basis as of December 31, 2022 Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs Total (Level 1) (Level 2) (Level 3) Collateral dependent loans $ 5,290,000 $ 0 $ 0 $ 5,290,000 Foreclosed assets 0 0 0 0 Total $ 5,290,000 $ 0 $ 0 $ 5,290,000 The balances of assets and liabilities measured at fair value on a nonrecurring basis as of December 31, 2021 Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs Total (Level 1) (Level 2) (Level 3) Impaired loans $ 3,807,000 $ 0 $ 0 $ 3,807,000 Foreclosed assets 0 0 0 0 Total $ 3,807,000 $ 0 $ 0 $ 3,807,000 The carrying values are based on the estimated value of the property or other assets. Fair value estimates of collateral on impaired loans and foreclosed assets are reviewed periodically. Our credit policies establish criteria for obtaining appraisals and determining internal value estimates. We may may

Note 18 - Earnings Per Share

Note 18 - Earnings Per Share	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 18 EARNINGS PER SHARE Basic earnings per share is based on the weighted average number of common shares and participating securities outstanding during the period. Diluted earnings per share include the dilutive effect of additional potential common shares issuable under our stock-based compensation plans and are determined using the treasury stock method. Our unvested restricted shares, which contain non-forfeitable rights to dividends whether paid or accrued (i.e., participating securities), are included in the number of shares outstanding for both basic and diluted earnings per share calculations. In the event of a net loss, our unvested restricted shares are excluded from the calculation of both basic and diluted earnings per share. Stock options for approximately 5,000, 7,000 and 9,000 shares of common stock were antidilutive and were not 2022, 2021 2020, The factors used in the earnings per share computation follow: 2022 2021 2020 Basic Net income attributable to common shares $ 61,063,000 $ 59,021,000 $ 44,138,000 Weighted average common shares outstanding 15,859,889 15,986,857 16,268,689 Basic earnings per common share $ 3.85 $ 3.69 $ 2.71 Diluted Net income attributable to common shares $ 61,063,000 $ 59,021,000 $ 44,138,000 Weighted average common shares outstanding for basic earnings per common share 15,859,889 15,986,857 16,268,689 Add: Dilutive effects of share-based awards 12 446 630 Average shares and dilutive potential common shares 15,859,901 15,987,303 16,269,319 Diluted earnings per common share $ 3.85 $ 3.69 $ 2.71

Note 19 - Variable Interest Ent

Note 19 - Variable Interest Entities	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Variable Interest Entity Disclosure [Text Block]	NOTE 19 VARIABLE INTEREST ENTITIES Variable interest entities are entities that either have a total equity investment that is insufficient to permit the entity to finance its activities without additional subordinated financial support or whose equity investors lack the characteristics of a controlling financial interest (i.e., ability to make significant decisions, through voting rights, right to receive the expected residual returns of the entity, and obligations to absorb the expected losses of the entity). Variable interest entities can be structured as corporations, trusts, partnerships, or other legal entities. We have relationships with certain variable interest entities related to the issuance of trust preferred securities. We have five business trusts that are wholly-owned subsidiaries of Mercantile, four of which were assumed by Mercantile in conjunction with the Firstbank merger. A fair value discount of $15.0 million was recorded at the time of the merger, which is being amortized at $0.7 million annually over the following 21.5 years. Each of the trusts was solely formed to issue preferred securities that were sold in private sales. Through a small common stock investment, we own 100% of the voting equity shares of each trust. The proceeds from the preferred securities and common stock sales were used by the trusts to purchase Floating Rate Notes issued by Mercantile. The rates of interest, interest payment dates, call features and maturity dates of each Floating Rate Note are identical to its respective Preferred Securities. The net proceeds from the issuance of the Floating Rate Notes were used for a variety of purposes, including contributions to our bank as capital to provide support for asset growth and the funding of stock repurchase programs and certain acquisitions. The assets, liabilities, operations and cash flows of each trust are solely related to the issuance, administration and repayment of the preferred securities held by third not not not not not The only significant assets of our trusts are the Floating Rate Notes, and the only significant liabilities of our trusts are the Preferred Securities. The Floating Rate Notes are categorized on our Consolidated Balance Sheets as subordinated debentures and the interest expense is recorded on our Consolidated Statements of Income under interest expense on other borrowings. On January 26, 2016, The following table depicts our five December 31, 2022: Preferred Securities Trust Name Outstanding Interest Rate Maturity Date Mercantile Bank Capital Trust I $ 21,000,000 3 Month Libor + 218 bps September 16, 2034 Firstbank Capital Trust I $ 10,000,000 3 Month Libor + 199 bps October 18, 2034 Firstbank Capital Trust II $ 10,000,000 3 Month Libor + 127 bps April 7, 2036 Firstbank Capital Trust III $ 7,500,000 3 Month Libor + 135 bps July 30, 2037 Firstbank Capital Trust IV $ 7,500,000 3 Month Libor + 135 bps July 30, 2037 The following table summarizes quantitative information about our involvement in unconsolidated variable interest entities as of December 31, 2022 December 31, 2021: Aggregate Assets Aggregate Liabilities Risk of Loss Trust preferred securities $ 58,100,000 $ 56,000,000 $ 2,100,000

Note 20 - Subordinated Notes

Note 20 - Subordinated Notes	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Subordinated Borrowings Disclosure [Text Block]	NOTE 20 SUBORDINATED NOTES On December 15, 2021, January 30, 2032, January 30, 2027 not January 29, 2027. January 30, 2027 January 30, 2032, December 15, 2021, On January 14, 2022, $75.0 December 15, 2021. January 14, 2022,

Note 21 - Regulatory Matters

Note 21 - Regulatory Matters	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Regulatory Capital Requirements under Banking Regulations [Text Block]	NOTE 21 We are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and prompt corrective action regulations involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk weightings, and other factors, and the regulators can lower classifications in certain cases. Failure to meet various capital requirements can initiate regulatory action that could have a direct material effect on the financial statements. The prompt corrective action regulations provide five not not no may may 2022 2021, no December 31, 2022 Our actual capital levels (dollars in thousands) and minimum required levels at year-end 2022 2021 Actual Minimum Required for Capital Adequacy Purposes Minimum Required to be Well Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio 2022 Total capital (to risk weighted assets) Consolidated $ 634,729 14.0 % $ 362,675 8.0 % $ NA NA Bank 618,709 13.7 362,490 8.0 453,112 10.0 % Tier 1 capital (to risk weighted assets) Consolidated 503,855 11.1 272,007 6.0 NA NA Bank 576,463 12.7 271,868 6.0 362,490 8.0 Common equity (to risk weighted assets) Consolidated 456,970 10.1 204,005 4.5 NA NA Bank 576,463 12.7 203,901 4.5 294,523 6.5 Tier 1 capital (to average assets) Consolidated 503,855 10.1 199,647 4.0 NA NA Bank 576,463 11.6 199,563 4.0 249,453 5.0 2021 Total capital (to risk weighted assets) Consolidated $ 565,143 14.0 % $ 324,101 8.0 % $ NA NA Bank 551,760 13.6 323,928 8.0 404,910 10.0 % Tier 1 capital (to risk weighted assets) Consolidated 456,133 11.3 243,076 6.0 NA NA Bank 516,397 12.8 242,946 6.0 323,928 8.0 Common equity (to risk weighted assets) Consolidated 409,963 10.1 182,307 4.5 NA NA Bank 516,397 12.8 182,210 4.5 263,192 6.5 Tier 1 capital (to average assets) Consolidated 456,133 9.2 198,574 4.0 NA NA Bank 516,397 10.4 198,510 4.0 248,137 5.0 Under the final BASEL III capital rules that became effective on January 1, 2015, 1 not three 2016. 1 1 January 1, 2019. December 31, 2022, Federal and state banking laws and regulations place certain restrictions on the amount of dividends our bank can transfer to Mercantile and on the capital levels that must be maintained. At year-end 2022, January 13, 2022, March 16, 2022 March 4, 2022. April 14, 2022, $0.31 June 15, 2022 June 3, 2022. July 14, 2022, September 14, 2022 September 2, 2022. October 13, 2022, December 14, 2022 December 2, 2022. As of December 31, 2022, May 2021. 2022. may Our consolidated capital levels as of December 31, 2022 2021 may 1 not 1 not May 19, 2010, December 31, 2009 December 31, 2022 2021, 1

Note 22 - Mercantile Bank Corpo

Note 22 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	NOTE 22 MERCANTILE BANK CORPORATION (PARENT COMPANY ONLY) CONDENSED FINANCIAL STATEMENTS CONDENSED BALANCE SHEETS 2022 2021 ASSETS Cash and cash equivalents $ 18,633,000 $ 14,570,000 Investment in bank subsidiary 543,599,000 545,691,000 Other assets 19,786,000 19,576,000 Total assets $ 582,018,000 $ 579,837,000 LIABILITIES AND SHAREHOLDERS EQUITY Liabilities $ 3,024,000 $ 1,388,000 Subordinated debentures 48,958,000 48,244,000 Subordinated notes 88,628,000 73,646,000 Shareholders’ equity 441,408,000 456,559,000 Total liabilities and shareholders’ equity $ 582,018,000 $ 579,837,000 CONDENSED STATEMENTS OF INCOME 2022 2021 2020 Income Interest and dividends from subsidiaries $ 26,056,000 $ 39,058,000 $ 32,588,000 Total income 26,056,000 39,058,000 32,588,000 Expenses Interest expense 6,104,000 1,934,000 2,268,000 Other operating expenses 5,645,000 5,831,000 4,441,000 Total expenses 11,749,000 7,765,000 6,709,000 Income before income tax benefit and equity in undistributed net income of subsidiary 14,307,000 31,293,000 25,879,000 Federal income tax benefit (2,535,000 ) (1,653,000 ) (1,173,000 ) Equity in undistributed net income of subsidiary 44,221,000 26,075,000 17,086,000 Net income $ 61,063,000 $ 59,021,000 $ 44,138,000 Comprehensive income (loss) $ (549,000 ) $ 49,806,000 $ 45,929,000 CONDENSED STATEMENTS OF CASH FLOWS 2022 2021 2020 Cash flows from operating activities Net income $ 61,063,000 $ 59,021,000 $ 44,138,000 Adjustments to reconcile net income to net cash from operating activities: Equity in undistributed net income of subsidiary (44,221,000 ) (26,075,000 ) (17,086,000 ) Stock-based compensation expense 3,377,000 3,784,000 2,325,000 Stock grants to directors for retainer fees 359,000 344,000 394,000 Change in other assets 858,000 49,000 (227,000 ) Change in other liabilities 1,636,000 (5,000 ) 812,000 Net cash from operating activities 23,072,000 37,118,000 30,356,000 Cash flows from investing activities Net capital investment into subsidiaries (15,000,000 ) (70,000,000 ) 0 Net cash for investing activities (15,000,000 ) (70,000,000 ) 0 Cash flows from financing activities Stock option exercises, net of cashless exercises 36,000 50,000 3,000 Employee stock purchase plan 45,000 48,000 49,000 Dividend reinvestment plan 867,000 877,000 814,000 Net proceeds from subordinated notes issuance 14,645,000 73,635,000 0 Repurchase of common shares 0 (21,380,000 ) (6,591,000 ) Cash dividends on common stock (19,602,000 ) (18,524,000 ) (17,930,000 ) Net cash (for) from financing activities (4,009,000 ) 34,706,000 (23,655,000 ) Net change in cash and cash equivalents 4,063,000 1,824,000 6,701,000 Cash and cash equivalents at beginning of period 14,570,000 12,746,000 6,045,000 Cash and cash equivalents at end of period $ 18,633,000 $ 14,570,000 $ 12,746,000

Note 23 - Subsequent Events

Note 23 - Subsequent Events	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 23 SUBSEQUENT EVENTS On January 12, 2023, March 15, 2023 March 3, 2023.

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation Mercantile has five separate business trusts: Mercantile Bank Capital Trust I, Firstbank Capital Trust I, Firstbank Capital Trust II, Firstbank Capital Trust III and Firstbank Capital Trust IV (“our trusts”). Our trusts were formed to issue trust preferred securities. We issued subordinated debentures to our trusts in return for the proceeds raised from the issuance of the trust preferred securities. Our trusts are not
Nature of Operation [Policy Text Block]	Nature of Operations July 15, 1997 December 15, 1997. June 1, 2014. Our bank is a community-based financial institution. Our bank’s primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are commercial loans, residential mortgage loans, and instalment loans. Substantially all loans are secured by specific items of collateral including business assets, real estate or consumer assets. Commercial loans are expected to be repaid from cash flow from operations of businesses. Real estate loans are secured by commercial or residential real estate. We have no one Our insurance company acquired an existing shelf insurance agency effective April 15, 2002. not no We have evaluated subsequent events for potential recognition and/or disclosure through the date these financial statements were issued.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates
Effect of Covid-19 Pandemic, Policy [Policy Text Block]	Coronavirus Pandemic: 2019 19” 2 19 may 19 The Coronavirus Pandemic has had a significant impact on our financial condition and operating results since its onset in March, 2020. March, 2022. 2022 2021. The following section summarizes the primary Covid- 19 ● Paycheck Protection Program The Paycheck Protection Program (“PPP”) reflected a substantial expansion of the Small Business Administration’s 100% 7 $350 500 100% 100% 1.00%, August 8, 2020. December 31, 2022, 2022. The Consolidated Appropriations Act, 2021 $284 May 31, 2021. December 31, 2022, 2022. ● Individual Economic Impact Payments The Internal Revenue Service made three $1,200 April 2020, $600 January 2021, $1,400 March 2021. ● Troubled Debt Restructuring Relief From March 1, 2020 60 December 31, 2020 may 19 2021 January 1, 2022. December 31, 2021. ● Current Expected Credit Loss Methodology Delay Financial institutions were not December 31, 2020. 2021 January 1, 2022. January 1, 2022. We continue to monitor the situation, including cases of sickness within our workforce, and will take action to adjust office attendance policies as circumstances warrant in order to protect the health and safety of employees, contractors, and others who visit our offices. However, if the Coronavirus Pandemic worsens and shutdown orders are issued in the future, our ability to operate could be adversely impacted, depending on the language of such orders. The extent to which the Coronavirus Pandemic continues to impact us will depend on future developments, which are highly uncertain and cannot be predicted.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents and Cash Flow Reporting 90
Marketable Securities, Policy [Policy Text Block]	Debt Securities first not not not Changes in the allowance under CECL are recorded as provisions for (or reversal of) credit loss expense. Losses are charged against the allowance when the collectability of an available for sale debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met. At December 31, 2022, no Interest income includes amortization of purchase premiums and accretion of discounts. Premiums and discounts on securities are amortized or accreted on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. It is not
Financing Receivable, Held-for-investment [Policy Text Block]	Loans December 31, 2022 2021. Interest income on commercial loans and mortgage loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer and credit card loans are typically charged off no All interest accrued but not
Commercial Loan Participations [Policy Text Block]	Commercial Loan Participations no no December 31, 2022 2021,
Financing Receivable, Held-for-sale [Policy Text Block]	Loans Held for Sale Year-end mortgage loans held for sale, included in total loans in the Consolidated Balance Sheets, were as follows: 2022 2021 Mortgage loans held for sale $ 3,565,000 $ 16,117,000 Less: Allowance to adjust to lower of cost or market 0 0 Mortgage loans held for sale, net $ 3,565,000 $ 16,117,000
Mortgage Loan Derivatives, Policy [Policy Text Block]	Mortgage Loan Derivatives not December 31, 2022 2021,
Mortgage Banking Activity [Policy Text Block]	Mortgage Banking Activities Servicing fee income is recorded for fees earned for servicing mortgage loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Amortization of mortgage loan servicing rights is netted against mortgage loan servicing income and recorded in mortgage banking activities in the Consolidated Statements of Income.
Troubled Debt Restructuring [Policy Text Block]	Troubled Debt Restructurings not may The federal banking agencies issued an “ Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus March 22, 2020, April 7, 2020. may six not 4013 December 31, 2019 March 1, 2020 60 March 13, 2020 ( December 31, 2020, not 2020, January 1, 2022.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Credit Losses ( “ Allowance ” ) June 2016, No. 2016 13, Measurement of Credit Losses on Financial Instruments not December 15, 2019. Financial institutions were not December 31, 2020. 2021, December 2020, January 1, 2022. no January 1, 2022, December 31, 2021. We adopted CECL effective January 1, 2022 January 1, 2022 Accrued interest receivable for loans is included in other assets on our Consolidated Balance Sheet. We elected not 90 The allowance is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged-off against the allowance when we believe the uncollectibility of a loan balance is confirmed. The allowance is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. Commercial loans are divided among five one two not. Our loan portfolio segments as of December 31, 2022 o Commercial Loans ■ Commercial and Industrial ■ Owner Occupied Commercial Real Estate ■ Non-Owner Occupied Commercial Real Estate ■ Multi-Family and Residential Rental ■ Vacant Land, Land Development and Residential Construction o Retail Loans ■ 1 4 ■ Other Consumer Loans The “remaining life methodology” is utilized for substantially all loan pools. This non-discounted cash flow approach projects an estimated future amortized cost basis based on current loan balance and repayment terms. Our historical loss rate is then applied to future loan balances at the instrument level based on remaining contractual life adjusted for amortization, prepayment and default to develop a baseline lifetime loss. The baseline lifetime loss is adjusted for changes in macroeconomic conditions over the reasonable and supportable forecast and reversion periods via a series of macroeconomic forecast inputs, such as gross domestic product, unemployment rates, interest rates, credit spreads, stock market volatility and property price indices, to quantify the impact of current and forecasted economic conditions on expected loan performance. We use migration to determine historical loss rates for commercial loans given the comprehensive loan grading process employed by the bank for over two January 1, 2011 Reasonable and supportable economic forecasts have to be incorporated in determining expected credit losses. The forecast period represents the time frame from the current period end through the point in time that we can reasonably forecast and support entity and environmental factors that are expected to impact the performance of our loan portfolio. Ideally, the economic forecast period would encompass the contractual terms of all loans; however, the ability to produce a forecast that is considered reasonable and supportable becomes more difficult or may not Subsequent to the end of the forecast period, we revert to historical loan data based on an ongoing evaluation of each economic forecast in relation to then current economic conditions as well as any developing loan loss activity and resulting historical data. As of December 31, 2022, one six We are not third December 31, 2022 January 1, 2022 During each reporting period, we also consider the need to adjust the historical loss rates as determined by our migration calculations to reflect the extent to which we expect current conditions and reasonable and supportable economic forecasts to differ from the conditions that existed for the period over which the migration-based historical loss information was determined. These qualitative adjustments may Traditional qualitative factors include: o Changes in lending policies and procedures o Changes in the nature and volume of the loan portfolio and in the terms of loans o Changes in the experience, ability and depth of lending management and other relevant staff o Changes in the volume and severity of past due loans, nonaccrual loans and adversely classified loans o Changes in the quality of the loan review program o Changes in the value of underlying collateral dependent loans o Existence and effect of any concentrations of credit and any changes in such o Effect of other factors such as competition and legal and regulatory requirements The estimation of future credit losses should reflect consideration of all significant factors that affect the collectibility of the loan portfolio at each evaluation date. While our methodology considers both the historical loss rates as well as the traditional qualitative factors, there may January 1, 2022, Expected credit losses are estimated over the contractual terms of the loans, adjusted for expected prepayments when appropriate. The contractual term generally excludes potential extensions, renewals and modifications. We are also required to consider expected credit losses associated with loan commitments over the contractual period in which we are exposed to credit risk on the underlying commitments unless the obligation is unconditionally cancellable by us. Any allowance for off-balance sheet credit exposures is reported as an other liability on our Consolidated Balance Sheet and is increased or decreased via other noninterest expense on our Consolidated Statement of Income. The calculation includes consideration of the likelihood that funding will occur and forecasted credit losses on commitments expected to be funded over their estimated lives. The allowance is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to be funded.
Transfers and Servicing of Financial Assets, Policy [Policy Text Block]	Transfers of Financial Assets 1 2 3 not
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment 5 33 3 7 may not
Financing Receivable, Held-for-investment, Foreclosed Asset [Policy Text Block]	Foreclosed Assets: December 31, 2022 2021.
Bank Owned Life Insurance, Policy [Policy Text Block]	Bank Owned Life Insurance: not
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Core Deposit Intangible may not 2022 no The core deposit intangible that arose from the merger with Firstbank was initially measured at fair value and is being amortized into noninterest expense over a ten
Repurchase and Resale Agreements Policy [Policy Text Block]	Repurchase Agreements
Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]	Financial Instruments and Loan Commitments
Share-Based Payment Arrangement [Policy Text Block]	Stock-Based Compensation
Revenue from Contract with Customer [Policy Text Block]	Revenue from Contracts with Customers 606, 606” 606, not Our primary sources of revenue are derived from interest and dividends earned on loans, securities and other financial instruments that are not 606. not We generally satisfy our performance obligations on contracts with customers as services are rendered, and the transaction prices are typically fixed and charged either on a periodic basis (generally monthly) or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 The following table depicts our sources of noninterest income presented in the Consolidated Statements of Income for the years ended December 31, 2022, 2021 2020 606: 2022 2021 2020 Service charges on deposit and sweep accounts $ 5,952,000 $ 5,078,000 $ 4,578,000 Credit and debit card fees 8,216,000 7,516,000 5,973,000 Payroll processing 2,178,000 1,815,000 1,745,000 Customer service fees 852,000 857,000 757,000 Service Charges on Deposit and Sweep Accounts: Credit and Debit Card Fees: Payroll Processing Fees: Customer Service Fees:
Advertising Cost [Policy Text Block]	Advertising Costs
Income Tax, Policy [Policy Text Block]	Income Taxes
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Values of Financial Instruments not not
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income
Derivatives, Policy [Policy Text Block]	Derivatives not Changes in the fair value of derivatives that are designated, for accounting purposes, as a hedge of the variability of cash flows to be received on various assets and liabilities and are effective are reported in other comprehensive income. They are later reclassified into earnings in the same periods during which the hedged transaction affects earnings and are included in the line item in which the hedged cash flows are recorded. If hedge accounting does not no December 31, 2022 2021.
Commitments and Contingencies, Policy [Policy Text Block]	Contingencies: not
New Accounting Pronouncements, Policy [Policy Text Block]	Newly Issued Not No. 2022 02 Financial Instruments Credit Losses (Topic 326 310 40, December 15, 2022. not

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Mortgage Loans Held for Sale [Table Text Block]	2022 2021 Mortgage loans held for sale $ 3,565,000 $ 16,117,000 Less: Allowance to adjust to lower of cost or market 0 0 Mortgage loans held for sale, net $ 3,565,000 $ 16,117,000
Revenue from External Customers by Products and Services [Table Text Block]	2022 2021 2020 Service charges on deposit and sweep accounts $ 5,952,000 $ 5,078,000 $ 4,578,000 Credit and debit card fees 8,216,000 7,516,000 5,973,000 Payroll processing 2,178,000 1,815,000 1,745,000 Customer service fees 852,000 857,000 757,000

Note 2 - Securities (Tables)

Note 2 - Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Debt Securities, Available-for-Sale [Table Text Block]	Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value 2022 U.S. Government agency debt obligations $ 453,836,000 $ 0 $ (65,092,000 ) $ 388,744,000 Mortgage-backed securities 38,002,000 19,000 (6,068,000 ) 31,953,000 Municipal general obligation bonds 163,041,000 450,000 (9,058,000 ) 154,433,000 Municipal revenue bonds 30,267,000 102,000 (3,063,000 ) 27,306,000 Other investments 500,000 0 0 500,000 $ 685,646,000 $ 571,000 $ (83,281,000 ) $ 602,936,000 2021 U.S. Government agency debt obligations $ 398,874,000 $ 266,000 $ (8,769,000 ) $ 390,371,000 Mortgage-backed securities 41,906,000 549,000 (652,000 ) 41,803,000 Municipal general obligation bonds 133,894,000 4,092,000 (392,000 ) 137,594,000 Municipal revenue bonds 22,289,000 331,000 (145,000 ) 22,475,000 Other investments 500,000 0 0 500,000 $ 597,463,000 $ 5,238,000 $ (9,958,000 ) $ 592,743,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]	Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Description of Securities Value Loss Value Loss Value Loss 2022 U.S. Government agency debt obligations $ 53,019,000 $ 5,713,000 $ 335,725,000 $ 59,379,000 $ 388,744,000 $ 65,092,000 Mortgage-backed securities 31,127,000 6,068,000 12,000 0 31,139,000 6,068,000 Municipal general obligation bonds 97,252,000 4,516,000 32,870,000 4,542,000 130,122,000 9,058,000 Municipal revenue bonds 12,532,000 1,141,000 10,609,000 1,922,000 23,141,000 3,063,000 Other investments 0 0 0 0 0 0 $ 193,930,000 $ 17,438,000 $ 379,216,000 $ 65,843,000 $ 573,146,000 $ 83,281,000 2021 U.S. Government agency debt obligations $ 274,287,000 $ 5,274,000 $ 110,053,000 $ 3,495,000 $ 384,340,000 $ 8,769,000 Mortgage-backed securities 23,184,000 652,000 24,000 0 23,208,000 652,000 Municipal general obligation bonds 40,748,000 392,000 0 0 40,748,000 392,000 Municipal revenue bonds 12,843,000 137,000 414,000 8,000 13,257,000 145,000 Other investments 0 0 0 0 0 0 $ 351,062,000 $ 6,455,000 $ 110,491,000 $ 3,503,000 $ 461,553,000 $ 9,958,000
Investments Classified by Contractual Maturity Date [Table Text Block]	Weighted Amortized Fair Average Yield Cost Value Due in one year or less 0.76% $ 21,278,000 $ 20,732,000 Due from one to five years 1.22 249,262,000 227,357,000 Due from five to ten years 1.88 318,700,000 271,652,000 Due after ten years 3.03 57,904,000 50,742,000 Mortgage-backed securities 2.10 38,002,000 31,953,000 Other investments 4.94 500,000 500,000 1.72% $ 685,646,000 $ 602,936,000

Note 3 - Loans and Allowance _2

Note 3 - Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	December 31, 2022 December 31, 2021 Percent Increase Balance % Balance % (Decrease) Commercial: Commercial and industrial (1) $ 1,185,083,000 30.3 % $ 1,137,419,000 32.9 % 4.2 % Vacant land, land development, and residential construction 61,873,000 1.6 43,239,000 1.3 43.1 Real estate – owner occupied 639,192,000 16.3 565,758,000 16.4 13.0 Real estate – non-owner occupied 1,033,734,000 26.4 1,027,415,000 29.7 0.6 Real estate – multi-family and residential rental 211,948,000 5.4 176,593,000 5.1 20.0 Total commercial 3,131,830,000 80.0 2,950,424,000 85.4 6.1 Retail: 1-4 family mortgages 755,036,000 19.3 442,547,000 12.8 70.6 Other consumer loans (2) 29,753,000 0.7 60,488,000 1.8 (50.8 ) Total retail 784,789,000 20.0 503,035,000 14.6 56.0 Total loans $ 3,916,619,000 100.0 % $ 3,453,459,000 100.0 % 13.4 %
Concentrations Within Loan Portfolio [Table Text Block]	2022 2021 Percentage Percentage of of Loan Loan Balance Portfolio Balance Portfolio Commercial real estate loans to lessors of non-residential buildings $ 738,891,000 18.9 % $ 737,589,000 21.4 %
Financing Receivable, Nonperforming [Table Text Block]	2022 2021 Loans past due 90 days or more still accruing interest $ 0 $ 155,000 Nonaccrual loans 7,728,000 2,313,000 Total nonperforming loans $ 7,728,000 $ 2,468,000 December 31, 2022 December 31, 2021 Commercial: Commercial and industrial $ 6,024,000 $ 663,000 Vacant land, land development, and residential construction 0 0 Real estate – owner occupied 248,000 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 6,272,000 663,000 Retail: 1-4 family mortgages 1,456,000 1,686,000 Other consumer loans 0 119,000 Total retail 1,456,000 1,805,000 Total nonperforming loans $ 7,728,000 $ 2,468,000
Financing Receivable, Past Due [Table Text Block]	Recorded Greater Balance > 30 59 60 89 Than 89 89 Days Days Days Total Total Days and Past Due Past Due Past Due Past Due Current Loans Accruing Commercial: Commercial and industrial $ 0 $ 5,705,000 $ 249,000 $ 5,954,000 $ 1,179,129,000 $ 1,185,083,000 $ 0 Vacant land, land development, and residential construction 0 0 0 0 61,873,000 61,873,000 0 Real estate – owner occupied 0 248,000 0 248,000 638,944,000 639,192,000 0 Real estate – non-owner occupied 0 0 0 0 1,033,734,000 1,033,734,000 0 Real estate – multi-family and residential rental 0 0 0 0 211,948,000 211,948,000 0 Total commercial 0 5,953,000 249,000 6,202,000 3,125,628,000 3,131,830,000 0 Retail: 1-4 family mortgages 1,334,000 88,000 116,000 1,538,000 753,498,000 755,036,000 0 Other consumer loans 15,000 1,000 0 16,000 29,737,000 29,753,000 0 Total retail 1,349,000 89,000 116,000 1,554,000 783,235,000 784,789,000 0 Total past due loans $ 1,349,000 $ 6,042,000 $ 365,000 $ 7,756,000 $ 3,908,863,000 $ 3,916,619,000 $ 0 Recorded Greater Balance > 30 59 60 89 Than 89 89 Days Days Days Total Total Days and Past Due Past Due Past Due Past Due Current Loans Accruing Commercial: Commercial and industrial $ 14,000 $ 0 $ 193,000 $ 207,000 $ 1,137,212,000 $ 1,137,419,000 $ 155,000 Vacant land, land development, and residential construction 13,000 0 0 13,000 43,226,000 43,239,000 0 Real estate – owner occupied 0 0 0 0 565,758,000 565,758,000 0 Real estate – non-owner occupied 0 0 0 0 1,027,415,000 1,027,415,000 0 Real estate – multi-family and residential rental 0 0 0 0 176,593,000 176,593,000 0 Total commercial 27,000 0 193,000 220,000 2,950,204,000 2,950,424,000 155,000 Retail: Home equity and other 132,000 2,000 20,000 154,000 60,334,000 60,488,000 0 1- 4 family mortgages 1,265,000 241,000 82,000 1,588,000 440,959,000 442,547,000 0 Total retail 1,397,000 243,000 102,000 1,742,000 501,293,000 503,035,000 0 Total past due loans $ 1,424,000 $ 243,000 $ 295,000 $ 1,962,000 $ 3,451,497,000 $ 3,453,459,000 $ 155,000
Financing Receivable, Nonaccrual [Table Text Block]	Recorded Principal Related Balance Allowance With no allowance recorded: Commercial: Commercial and industrial $ 249,000 $ 0 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 249,000 0 Retail: 1-4 family mortgages 1,064,000 0 Other consumer loans 0 0 Total retail 1,064,000 0 Total with no allowance recorded $ 1,313,000 $ 0 With an allowance recorded: Commercial: Commercial and industrial $ 5,775,000 $ 2,051,000 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 248,000 32,000 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 6,023,000 2,083,000 Retail: 1-4 family mortgages 392,000 200,000 Other consumer loans 0 0 Total retail 392,000 200,000 Total with an allowance recorded $ 6,415,000 $ 2,283,000 Total nonaccrual loans: Commercial $ 6,272,000 $ 2,083,000 Retail 1,456,000 200,000 Total nonaccrual loans $ 7,728,000 $ 2,283,000
Impaired Financing Receivables [Table Text Block]	Unpaid Contractual Principal Balance Recorded Principal Balance Related Allowance Year-To-Date Average Recorded Principal Balance With no related allowance recorded: Commercial: Commercial and industrial $ 2,893,000 $ 2,818,000 $ 3,632,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 9,674,000 9,674,000 12,634,000 Real estate – non-owner occupied 0 0 131,000 Real estate – multi-family and residential rental 91,000 91,000 37,000 Total commercial 12,658,000 12,583,000 16,434,000 Retail: Home equity and other 1,173,000 1,107,000 1,096,000 1-4 family mortgages 3,166,000 2,025,000 2,327,000 Total retail 4,339,000 3,132,000 3,423,000 Total with no related allowance recorded $ 16,997,000 $ 15,715,000 $ 19,857,000 Unpaid Contractual Principal Balance Recorded Principal Balance Related Allowance Year-To-Date Average Recorded Principal Balance With an allowance recorded: Commercial: Commercial and industrial $ 2,192,000 $ 2,192,000 $ 266,000 $ 1,732,000 Vacant land, land development and residential construction 0 0 0 0 Real estate – owner occupied 761,000 761,000 84,000 803,000 Real estate – non-owner occupied 146,000 146,000 4,000 154,000 Real estate – multi-family and residential rental 0 0 0 0 Total commercial 3,099,000 3,099,000 354,000 2,689,000 Retail: Home equity and other 160,000 140,000 123,000 214,000 1-4 family mortgages 412,000 412,000 69,000 537,000 Total retail 572,000 552,000 192,000 751,000 Total with an allowance recorded $ 3,671,000 $ 3,651,000 $ 546,000 $ 3,440,000 Total impaired loans: Commercial $ 15,757,000 $ 15,682,000 $ 354,000 $ 19,123,000 Retail 4,911,000 3,684,000 192,000 4,174,000 Total impaired loans $ 20,668,000 $ 19,366,000 $ 546,000 $ 23,297,000
Financing Receivable Credit Quality Indicators [Table Text Block]	Commercial and Industrial Commercial Vacant Land, Land Development, and Residential Construction Commercial Real Estate - Owner Occupied Commercial Real Estate - Non-Owner Occupied Commercial Real Estate - Multi-Family and Residential Rental Internal credit risk grade groupings: Grades 1 – 4 (1) $ 719,583,000 $ 41,711,000 $ 406,341,000 $ 447,606,000 $ 118,385,000 Grades 5 – 7 450,405,000 20,057,000 229,766,000 573,728,000 93,514,000 Grades 8 – 9 15,095,000 105,000 3,085,000 12,400,000 49,000 Total commercial $ 1,185,083,000 $ 61,873,000 $ 639,192,000 $ 1,033,734,000 $ 211,948,000 Commercial and Industrial Commercial Vacant Land, Land Development, and Residential Construction Commercial Real Estate - Owner Occupied Commercial Real Estate - Non-Owner Occupied Commercial Real Estate - Multi-Family and Residential Rental Internal credit risk grade groupings: Grades 1 – 4 (1) $ 729,224,000 $ 28,390,000 $ 346,082,000 $ 503,482,000 $ 119,473,000 Grades 5 – 7 398,378,000 14,730,000 208,060,000 511,280,000 56,968,000 Grades 8 – 9 9,817,000 119,000 11,616,000 12,653,000 152,000 Total commercial $ 1,137,419,000 $ 43,239,000 $ 565,758,000 $ 1,027,415,000 $ 176,593,000
Financing Receivable by Origination Year [Table Text Block]	2022 2021 2020 2019 2018 Prior Term Total Revolving Loans Grand Total Commercial: Commercial and Industrial: Grades 1 – 4 $ 115,494 $ 141,481 $ 43,961 $ 9,194 $ 3,230 $ 9,851 $ 323,211 $ 396,372 $ 719,583 Grades 5 – 7 151,783 47,030 31,697 8,870 569 93 240,042 210,363 450,405 Grades 8 – 9 3,784 249 0 0 48 29 4,110 10,985 15,095 Total $ 271,061 $ 188,760 $ 75,658 $ 18,064 $ 3,847 $ 9,973 $ 567,363 $ 617,720 $ 1,185,083 Vacant Land, Land Development and Residential Construction: Grades 1 – 4 $ 31,756 $ 6,196 $ 3,428 $ 0 $ 0 $ 331 $ 41,711 $ 0 $ 41,711 Grades 5 – 7 10,270 8,760 351 50 0 626 20,057 0 20,057 Grades 8 – 9 0 0 0 0 14 91 105 0 105 Total $ 42,026 $ 14,956 $ 3,779 $ 50 $ 14 $ 1,048 $ 61,873 $ 0 $ 61,873 Real Estate – Owner Occupied: Grades 1 – 4 $ 194,072 $ 113,528 $ 53,630 $ 19,670 $ 19,279 $ 6,162 $ 406,341 $ 0 $ 406,341 Grades 5 – 7 115,720 56,173 33,913 10,245 12,550 1,165 229,766 0 229,766 Grades 8 – 9 2,919 0 44 0 122 0 3,085 0 3,085 Total $ 312,711 $ 169,701 $ 87,587 $ 29,915 $ 31,951 $ 7,327 $ 639,192 $ 0 $ 639,192 Real Estate – Non-Owner Occupied: Grades 1 – 4 $ 129,153 $ 163,035 $ 89,125 $ 44,196 $ 10,079 $ 12,018 $ 447,606 $ 0 $ 447,606 Grades 5 – 7 183,388 164,334 139,951 35,200 13,456 37,399 573,728 0 573,728 Grades 8 – 9 6,712 5,688 0 0 0 0 12,400 0 12,400 Total $ 319,253 $ 333,057 $ 229,076 $ 79,396 $ 23,535 $ 49,417 $ 1,033,734 $ 0 $ 1,033,734 Real Estate – Multi-Family and Residential Rental: Grades 1 – 4 $ 31,470 $ 38,176 $ 36,348 $ 5,306 $ 3,082 $ 4,003 $ 118,385 $ 0 $ 118,385 Grades 5 – 7 48,847 25,786 12,879 3,162 2,557 283 93,514 0 93,514 Grades 8 – 9 0 0 0 0 0 49 49 0 49 Total $ 80,317 $ 63,962 $ 49,227 $ 8,468 $ 5,639 $ 4,335 $ 211,948 $ 0 $ 211,948 Total Commercial $ 1,025,368 $ 770,436 $ 445,327 $ 135,893 $ 64,986 $ 72,100 $ 2,514,110 $ 617,720 $ 3,131,830 2022 2021 2020 2019 2018 Prior Term Total Revolving Loans Grand Total Retail: 1-4 Family Mortgages: Performing $ 313,611 $ 242,950 $ 91,936 $ 12,094 $ 14,297 $ 41,622 $ 716,510 $ 37,070 $ 753,580 Nonperforming 142 82 0 0 203 1,029 1,456 0 1,456 Total $ 313,753 $ 243,032 $ 91,936 $ 12,094 $ 14,500 $ 42,651 $ 717,966 $ 37,070 $ 755,036 Other Consumer Loans: Performing $ 4,349 $ 2,870 $ 1,040 $ 1,074 $ 395 $ 430 $ 10,158 $ 19,595 $ 29,753 Nonperforming 0 0 0 0 0 0 0 0 0 Total $ 4,349 $ 2,870 $ 1,040 $ 1,074 $ 395 $ 430 $ 10,158 $ 19,595 $ 29,753 Total Retail $ 318,102 $ 245,902 $ 92,976 $ 13,168 $ 14,895 $ 43,081 $ 728,124 $ 56,665 $ 784,789 Grand Total $ 1,343,470 $ 1,016,338 $ 538,303 $ 149,061 $ 79,881 $ 115,181 $ 3,242,234 $ 674,385 $ 3,916,619
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non-owner occupied Commercial real estate multi-family and residential rental 1-4 family mortgages Other consumer loans Unallocated Total Allowance for credit losses: Beginning balance $ 10,782 $ 420 $ 6,045 $ 13,301 $ 1,695 $ 2,449 $ 626 $ 45 $ 35,363 Adoption of ASU 2016-13 (1,571 ) (43 ) (560 ) (2,534 ) (621 ) 5,395 (411 ) (55 ) (400 ) Provision for credit losses 946 138 378 (603 ) 152 5,621 (111 ) 29 6,550 Charge-offs (171 ) (29 ) (38 ) 0 0 (33 ) (21 ) 0 (292 ) Recoveries 217 4 89 0 43 595 77 0 1,025 Ending balance $ 10,203 $ 490 $ 5,914 $ 10,164 $ 1,269 $ 14,027 $ 160 $ 19 $ 42,246 Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non- owner occupied Commercial real estate multi-family and residential rental Home equity and other 1 4 family mortgages Unallocated Total Allowance for loan losses: Beginning balance $ 9,424 $ 679 $ 8,246 $ 13,611 $ 1,819 $ 889 $ 3,240 $ 59 $ 37,967 Provision for loan losses 2,030 (618 ) (3,308 ) (310 ) (150 ) (301 ) (1,629 ) (14 ) (4,300 ) Charge-offs (882 ) (15 ) (12 ) 0 0 (43 ) (92 ) 0 (1,044 ) Recoveries 210 374 1,119 0 26 81 930 0 2,740 Ending balance $ 10,782 $ 420 $ 6,045 $ 13,301 $ 1,695 $ 626 $ 2,449 $ 45 $ 35,363 Ending balance: individually evaluated for impairment $ 266 $ 0 $ 84 $ 0 $ 4 $ 123 $ 69 $ 0 $ 546 Ending balance: collectively evaluated for impairment $ 10,516 $ 420 $ 5,961 $ 13,301 $ 1,691 $ 503 $ 2,380 $ 45 $ 34,817 Total loans (*): Ending balance $ 1,097,309 $ 43,239 $ 565,758 $ 1,027,415 $ 176,593 $ 60,488 $ 442,547 $ 3,413,349 Ending balance: individually evaluated for impairment $ 5,010 $ 0 $ 10,435 $ 146 $ 91 $ 1,247 $ 2,437 $ 19,366 Ending balance: collectively evaluated for impairment $ 1,092,299 $ 43,239 $ 555,323 $ 1,027,269 $ 176,502 $ 59,241 $ 440,110 $ 3,393,983 Commercial and industrial Commercial vacant land, land development and residential construction Commercial real estate owner occupied Commercial real estate non- owner occupied Commercial real estate multi-family and residential rental Home equity and other 1 4 family mortgages Unallocated Total Allowance for loan losses: Beginning balance $ 6,659 $ 466 $ 6,291 $ 6,761 $ 893 $ 861 1,888 $ 70 $ 23,889 Provision for loan losses 2,921 289 1,881 6,837 907 58 1,168 (11 ) 14,050 Charge-offs (247 ) (113 ) (235 ) 0 (18 ) (96 ) (129 ) 0 (838 ) Recoveries 91 37 309 13 37 66 313 0 866 Ending balance $ 9,424 $ 679 $ 8,246 $ 13,611 $ 1,819 $ 889 $ 3,240 $ 59 $ 37,967 Ending balance: individually evaluated for impairment $ 53 $ 0 $ 77 $ 8 $ 0 $ 241 $ 172 $ 0 $ 551 Ending balance: collectively evaluated for impairment $ 9,371 $ 679 $ 8,169 $ 13,603 $ 1,819 $ 648 $ 3,068 $ 59 $ 37,416 Total loans (*): Ending balance $ 780,164 $ 55,055 $ 529,953 $ 917,436 $ 146,095 $ 61,620 $ 337,888 $ 2,828,211 Ending balance: individually evaluated for impairment $ 6,585 $ 0 $ 15,327 $ 503 $ 0 $ 1,270 $ 3,273 $ 26,958 Ending balance: collectively evaluated for impairment $ 773,579 $ 55,055 $ 514,626 $ 916,933 $ 146,095 $ 60,350 $ 334,615 $ 2,801,253
Financing Receivable, Troubled Debt Restructuring [Table Text Block]	Pre- Post- Modification Modification Recorded Recorded Number of Principal Principal Contracts Balance Balance Commercial: Commercial and industrial 3 $ 6,593,000 $ 6,593,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 0 0 0 Real estate – non-owner occupied 0 0 0 Real estate – multi-family and residential rental 0 0 0 Total commercial 3 6,593,000 6,593,000 Retail: Home equity and other 0 0 0 1-4 family mortgages 7 758,000 757,000 Total retail 7 758,000 757,000 Total 10 $ 7,351,000 $ 7,350,000 Pre- Post- Modification Modification Recorded Recorded Number of Principal Principal Contracts Balance Balance Commercial: Commercial and industrial 10 $ 3,017,000 $ 3,016,000 Vacant land, land development and residential construction 0 0 0 Real estate – owner occupied 1 692,000 692,000 Real estate – non-owner occupied 0 0 0 Real estate – multi-family and residential rental 1 93,000 93,000 Total commercial 12 3,802,000 3,801,000 Retail: Home equity and other 4 485,000 482,000 1-4 family mortgages 2 46,000 46,000 Total retail 6 531,000 528,000 Total 18 $ 4,333,000 $ 4,329,000
Troubled Debt Restructurings on Financing Receivables with in Previous Twelve Months that Became Over Thirty Days Past Due [Table Text Block]	Number of Contracts Recorded Principal Balance Commercial: Commercial and industrial 2 $ 5,665,000 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 2 5,665,000 Retail: Home equity and other 0 0 1-4 family mortgages 0 0 Total retail 0 0 Total 2 $ 5,665,000 Number of Contracts Recorded Principal Balance Commercial: Commercial and industrial 0 $ 0 Vacant land, land development and residential construction 0 0 Real estate – owner occupied 0 0 Real estate – non-owner occupied 0 0 Real estate – multi-family and residential rental 0 0 Total commercial 0 0 Retail: Home equity and other 0 0 1-4 family mortgages 0 0 Total retail 0 0 Total 0 $ 0
Trouble Debt Restructuring Activity [Table Text Block]	Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 4,973,000 $ 0 $ 10,435,000 $ 146,000 $ 91,000 Charge-Offs (95,000 ) 0 (39,000 ) 0 0 Payments (772,000 ) 0 (9,683,000 ) (16,000 ) (91,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 4,566,000 0 (669,000 ) 0 0 Ending Balance $ 8,672,000 $ 0 $ 44,000 $ 130,000 $ 0 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,202,000 $ 627,000 Charge-Offs 0 0 Payments (14,000 ) (317,000 ) Transfers to ORE 0 0 Net Additions/Deletions (1) (1,187,000 ) 2,426,000 Ending Balance $ 1,000 $ 2,736,000 Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 6,414,000 $ 0 $ 14,797,000 $ 480,000 $ 0 Charge-Offs (17,000 ) 0 0 0 0 Payments (4,278,000 ) 0 (5,048,000 ) (334,000 ) (1,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 2,854,000 0 686,000 0 92,000 Ending Balance $ 4,973,000 $ 0 $ 10,435,000 $ 146,000 $ 91,000 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,146,000 $ 806,000 Charge-Offs 0 0 Payments (426,000 ) (224,000 ) Transfers to ORE 0 0 Net Additions/Deletions 482,000 45,000 Ending Balance $ 1,202,000 $ 627,000 Commercial and Commercial Vacant Land, Land Development, and Residential Commercial Real Estate - Owner Commercial Real Estate - Non-Owner Commercial Real Estate - Multi-Family and Residential Industrial Construction Occupied Occupied Rental Commercial Loan Portfolio: Beginning Balance $ 8,587,000 $ 85,000 $ 1,145,000 $ 178,000 $ 7,000 Charge-Offs 0 0 0 0 0 Payments (11,260,000 ) (85,000 ) (3,765,000 ) (585,000 ) (7,000 ) Transfers to ORE 0 0 0 0 0 Net Additions/Deletions 9,087,000 0 17,417,000 887,000 0 Ending Balance $ 6,414,000 $ 0 $ 14,797,000 $ 480,000 $ 0 Retail Home Equity and Other Retail 1-4 Family Mortgages Retail Loan Portfolio: Beginning Balance $ 1,415,000 $ 724,000 Charge-Offs 0 0 Payments (881,000 ) (68,000 ) Transfers to ORE 0 0 Net Additions/Deletions 612,000 150,000 Ending Balance $ 1,146,000 $ 806,000
Retail Portfolio Segment [Member]
Notes Tables
Financing Receivable Credit Quality Indicators [Table Text Block]	Retail 1-4 Family Mortgages Retail Other Consumer Loans Performing $ 753,580,000 $ 29,753,000 Nonperforming 1,456,000 0 Total retail $ 755,036,000 $ 29,753,000 Retail Home Equity and Other Retail 1-4 Family Mortgages Performing $ 60,369,000 $ 440,861,000 Nonperforming 119,000 1,686,000 Total retail $ 60,488,000 $ 442,547,000

Note 4 - Premises and Equipme_2

Note 4 - Premises and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Property, Plant and Equipment [Table Text Block]	2022 2021 Land and improvements $ 13,532,000 $ 15,111,000 Buildings 53,865,000 56,168,000 Furniture and equipment 22,941,000 22,974,000 90,338,000 94,253,000 Less: accumulated depreciation 38,862,000 36,955,000 Total premises and equipment $ 51,476,000 $ 57,298,000
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	2023 $ 1,091,000 2024 883,000 2025 443,000 2026 339,000 2027 288,000 Thereafter 1,589,000 Total undiscounted lease payments 4,633,000 Less effect of discounting (1,118,000 ) Present value of future lease payments (lease liability) 3,515,000

Note 5 - Mortgage Loan Servic_2

Note 5 - Mortgage Loan Servicing (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Mortgage Loans Serviced for Others [Table Text Block]	2022 2021 Mortgage loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 1,345,312,000 $ 1,320,550,000 Federal Home Loan Bank 30,831,000 23,505,000 Total mortgage loans serviced for others $ 1,376,143,000 $ 1,344,055,000
Servicing Asset at Amortized Cost [Table Text Block]	2022 2021 Balance at beginning of year $ 12,248,000 $ 8,189,000 Additions 2,773,000 7,711,000 Amortized to expense (3,184,000 ) (3,652,000 ) Balance at end of year $ 11,837,000 $ 12,248,000
Schedule of Mortgage Servicing Rights Future Amortization Expense [Table Text Block]	2023 $ 2,366,000 2024 2,066,000 2025 1,772,000 2026 1,492,000 2027 1,236,000 Thereafter 2,905,000

Note 6 - Core Deposit Intangi_2

Note 6 - Core Deposit Intangible Asset, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2023 $ 450,000 2024 133,000

Note 7 - Deposits (Tables)

Note 7 - Deposits (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Summary of Deposits and Percentage Change in Deposits [Table Text Block]	December 31, 2022 December 31, 2021 Percent Increase Balance % Balance % (Decrease) Noninterest-bearing checking $ 1,604,750,000 43.2 % $ 1,677,952,000 41.1 % (4.4 %) Interest-bearing checking 575,028,000 15.5 538,838,000 13.2 6.7 Money market 776,723,000 20.9 1,040,176,000 25.5 (25.3 ) Savings 381,602,000 10.3 394,330,000 9.7 (3.2 ) Time, under $100,000 113,099,000 3.0 132,776,000 3.2 (14.8 ) Time, $100,000 and over 261,609,000 7.1 275,208,000 6.7 (4.9 ) Total local deposits 3,712,811,000 100.0 4,059,280,000 99.4 (8.5 ) Out-of-area time, $100,000 and over 0 0.0 23,913,000 0.6 (100.0 ) Total deposits $ 3,712,811,000 100.0 % $ 4,083,193,000 100.0 % (9.1 %)
Contractual Maturities of Certificates of Deposits [Table Text Block]	2022 2021 In one year or less $ 188,887,000 $ 260,501,000 In one to two years 68,434,000 78,024,000 In two to three years 22,053,000 34,595,000 In three to four years 30,761,000 7,863,000 In four to five years 64,573,000 50,914,000 Total certificates of deposit $ 374,708,000 $ 431,897,000
Contractual Maturities of Certificates of Deposits of More than Specified Amount [Table Text Block]	2022 2021 Up to three months $ 40,538,000 $ 68,887,000 Three months to six months 25,141,000 53,077,000 Six months to twelve months 54,394,000 56,612,000 Over twelve months 141,536,000 120,545,000 Total certificates of deposit $ 261,609,000 $ 299,121,000

Note 8 - Securities Sold Unde_2

Note 8 - Securities Sold Under Agreements to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Repurchase Agreements [Table Text Block]	2022 2021 Outstanding balance at year-end $ 194,340,000 $ 197,463,000 Weighted average interest rate at year-end 0.75 % 0.11 % Average daily balance during the year $ 200,499,000 $ 158,855,000 Weighted average interest rate during the year 0.15 % 0.11 % Maximum daily balance during the year $ 235,577,000 $ 209,093,000

Note 9 - Federal Home Loan Ba_2

Note 9 - Federal Home Loan Bank of Indianapolis Advances (Tables)	12 Months Ended
	Dec. 31, 2022
Amortizing Advances [Member]
Notes Tables
Maturities of Currently Outstanding FHLB Advances [Table Text Block]	2023 $ 353,000 2024 826,000 2025 862,000 2026 899,000 2027 938,000 Thereafter 24,385,000
Bullet Advances [member]
Notes Tables
Maturities of Currently Outstanding FHLB Advances [Table Text Block]	2023 $ 80,000,000 2024 80,000,000 2025 50,000,000 2026 30,000,000 2027 40,000,000

Note 10 - Federal Income Taxes

Note 10 - Federal Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	2022 2021 2020 Current expense $ 16,080,000 $ 12,675,000 $ 14,945,000 Deferred expense (1,353,000 ) 2,020,000 (4,141,000 ) Change in valuation allowance 0 0 (94,000 ) Tax expense $ 14,727,000 $ 14,695,000 $ 10,710,000
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2022 2021 2020 Tax at statutory rate $ 15,915,000 $ 15,481,000 $ 11,518,000 Increase (decrease) from Tax-exempt interest (695,000 ) (658,000 ) (681,000 ) Bank owned life insurance (334,000 ) (233,000 ) (238,000 ) Change in valuation allowance 0 0 (94,000 ) Other (159,000 ) 105,000 205,000 Tax expense $ 14,727,000 $ 14,695,000 $ 10,710,000
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2022 2021 Deferred income tax assets Allowance for credit losses $ 8,872,000 $ 7,426,000 Deferred compensation 232,000 259,000 Stock compensation 1,018,000 941,000 Nonaccrual loan interest income 136,000 159,000 Unrealized loss on securities 17,369,000 991,000 Lease liability 810,000 749,000 Deferred loan fees and costs 0 520,000 Other 494,000 595,000 Deferred tax asset 28,931,000 11,640,000 Deferred income tax liabilities Depreciation 697,000 1,168,000 Prepaid expenses 504,000 416,000 Core deposit intangible 120,000 276,000 Mortgage loan servicing rights 2,486,000 2,572,000 Deferred loan fees and costs 211,000 0 Right of use lease asset 810,000 749,000 Business combination adjustments 1,877,000 2,013,000 Other 326,000 193,000 Deferred tax liability 7,031,000 7,387,000 Total net deferred tax asset $ 21,900,000 $ 4,253,000

Note 11 - Stock-based Compens_2

Note 11 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	2022 2021 2020 Shares Weighted Average Fair Value Shares Weighted Average Fair Value Shares Weighted Average Fair Value Nonvested at beginning of year 353,691 $ 30.71 262,336 $ 29.42 262,260 $ 34.91 Granted 121,631 32.18 163,000 33.68 121,518 24.65 Vested (94,010 ) 34.86 (59,772 ) 31.82 (85,445 ) 37.08 Forfeited (6,541 ) 27.98 (11,873 ) 29.54 (35,997 ) 33.71 Nonvested at end of year 374,771 $ 30.49 353,691 $ 30.71 262,336 $ 29.42
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	2022 2021 2020 Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Outstanding at beginning of year 7,700 $ 34.89 9,700 $ 32.83 10,700 $ 30.25 Granted 0 NA 0 NA 0 NA Exercised (2,700 ) 32.42 (2,000 ) 24.91 (1,000 ) 5.19 Forfeited or expired 0 NA 0 NA 0 NA Outstanding at end of year 5,000 $ 36.22 7,700 $ 34.89 9,700 $ 32.83 Options exercisable at year-end 5,000 $ 36.22 7,700 $ 34.89 9,700 $ 32.83
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]	Outstanding Exercisable Weighted Average Weighted Weighted Range of Remaining Average Average Exercise Contractual Exercise Exercise Prices Number Life (Years) Price Number Price $36.00 - $37.00 5,000 0.9 $ 36.22 5,000 $ 36.22 Outstanding at year end 5,000 0.9 $ 36.22 5,000 $ 36.22
Schedule of Share-based Compensation Shares Authorized Under Stock Option Plans Information Related to Option Outstanding [Table Text Block]	2022 2021 2020 Minimum exercise price $ 36.22 $ 27.66 $ 22.15 Maximum exercise price 36.22 36.22 36.22 Average remaining option term (years) 0.9 1.7 2.4
Schedule of Share Based Compensation Arrangement by Share Based Payment Award Options Information Related to Stock Option Grants and Exercised [Table Text Block]	2022 2021 2020 Aggregate intrinsic value of stock options exercised $ 16,000 $ 13,000 $ 17,000 Cash received from stock option exercises 36,000 50,000 3,000 Tax benefit realized from stock option exercises 0 0 0 Weighted average per share fair value of stock options granted NA NA NA

Note 12 - Related Parties (Tabl

Note 12 - Related Parties (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Related Party Transactions [Table Text Block]	2022 2021 Beginning balance $ 87,672,000 $ 108,042,000 New loans 10,619,000 2,542,000 Repayments (5,631,000 ) (22,912,000 ) Ending balance $ 92,660,000 $ 87,672,000

Note 13 - Commitments and Off_2

Note 13 - Commitments and Off-balance-sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Summary of Contractual Amounts of Financial Instruments With Off Balance Sheet Risk [Table Text Block]	2022 2021 Commercial unused lines of credit $ 1,283,703,000 $ 1,098,951,000 Unused lines of credit secured by 1 – 4 family residential properties 71,972,000 64,313,000 Credit card unused lines of credit 123,687,000 92,146,000 Other consumer unused lines of credit 75,747,000 64,876,000 Commitments to make loans 329,646,000 212,476,000 Standby letters of credit 23,539,000 33,109,000 Total commitments $ 1,908,294,000 $ 1,565,871,000
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]	2022 2021 Contract Carrying Contract Carrying Amount Value Amount Value Standby letters of credit $ 23,539,000 $ 108,000 $ 33,109,000 $ 212,000

Note 15 - Derivatives and Hed_2

Note 15 - Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Derivative Instruments [Table Text Block]	Notional Amount Balance Sheet Location Fair Value Derivative Assets Interest rate swaps $ 401,572,000 Other Assets $ 25,697,000 Derivative Liabilities Interest rate swaps 401,572,000 Other Liabilities 25,900,000 Notional Amount Balance Sheet Location Fair Value Derivative Assets Interest rate swaps $ 279,419,000 Other Assets $ 4,609,000 Derivative Liabilities Interest rate swaps 279,419,000 Other Liabilities 4,857,000

Note 16 - Fair Values of Fina_2

Note 16 - Fair Values of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	Level in 2022 2021 Fair Value Carrying Fair Carrying Fair Hierarchy Amount Value Amount Value Financial assets Cash and cash equivalents Level 1 $ 96,772 $ 96,772 $ 975,160 $ 975,160 Securities available for sale (1) 602,936 602,936 592,743 592,743 Federal Home Loan Bank stock (2) 17,721 17,721 18,002 18,002 Loans, net Level 3 3,874,373 3,800,042 3,418,096 3,498,345 Mortgage loans held for sale Level 2 3,565 3,643 16,117 16,707 Mortgage servicing rights Level 3 11,837 17,727 12,248 15,445 Accrued interest receivable Level 2 15,476 15,476 9,311 9,311 Interest rate swaps Level 2 25,697 25,697 4,609 4,609 Financial liabilities Deposits Level 2 3,712,811 3,379,403 4,083,193 4,028,249 Securities sold under agreements to repurchase Level 2 194,340 194,340 197,463 197,463 Federal Home Loan Bank advances Level 2 308,263 292,044 374,000 384,927 Subordinated debentures Level 2 48,958 49,531 48,244 48,284 Subordinated notes Level 2 88,628 75,024 73,646 73,646 Accrued interest payable Level 2 3,223 3,223 1,393 1,393 Interest rate swaps Level 2 25,900 25,900 4,857 4,857

Note 17 - Fair Value Measurem_2

Note 17 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Government agency debt obligations $ 388,744,000 $ 0 $ 388,744,000 $ 0 Mortgage-backed securities 31,953,000 0 31,953,000 0 Municipal general obligation bonds 154,433,000 0 153,855,000 578,000 Municipal revenue bonds 27,306,000 0 27,306,000 0 Other investments 500,000 0 500,000 0 Interest rate swaps 25,697,000 0 25,697,000 0 Total assets $ 628,633,000 $ 0 $ 628,055,000 $ 578,000 Interest rate swaps 25,900,000 0 25,900,000 0 Total liabilities $ 25,900,000 $ 0 $ 25,900,000 $ 0 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available for sale securities U.S. Government agency debt obligations $ 390,371,000 $ 0 $ 390,371,000 $ 0 Mortgage-backed securities 41,803,000 0 41,803,000 0 Municipal general obligation bonds 137,594,000 0 136,917,000 677,000 Municipal revenue bonds 22,475,000 0 22,475,000 0 Other investments 500,000 0 500,000 0 Interest rate swaps 4,609,000 0 4,609,000 0 Total assets $ 597,352,000 $ 0 $ 596,675,000 $ 677,000 Interest rate swaps 4,857,000 0 4,857,000 0 Total liabilities $ 4,857,000 $ 0 $ 4,857,000 $ 0
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]	Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs Total (Level 1) (Level 2) (Level 3) Collateral dependent loans $ 5,290,000 $ 0 $ 0 $ 5,290,000 Foreclosed assets 0 0 0 0 Total $ 5,290,000 $ 0 $ 0 $ 5,290,000 Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs Total (Level 1) (Level 2) (Level 3) Impaired loans $ 3,807,000 $ 0 $ 0 $ 3,807,000 Foreclosed assets 0 0 0 0 Total $ 3,807,000 $ 0 $ 0 $ 3,807,000

Note 18 - Earnings Per Share (T

Note 18 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	2022 2021 2020 Basic Net income attributable to common shares $ 61,063,000 $ 59,021,000 $ 44,138,000 Weighted average common shares outstanding 15,859,889 15,986,857 16,268,689 Basic earnings per common share $ 3.85 $ 3.69 $ 2.71 Diluted Net income attributable to common shares $ 61,063,000 $ 59,021,000 $ 44,138,000 Weighted average common shares outstanding for basic earnings per common share 15,859,889 15,986,857 16,268,689 Add: Dilutive effects of share-based awards 12 446 630 Average shares and dilutive potential common shares 15,859,901 15,987,303 16,269,319 Diluted earnings per common share $ 3.85 $ 3.69 $ 2.71

Note 19 - Variable Interest E_2

Note 19 - Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Subordinated Borrowing [Table Text Block]	Preferred Securities Trust Name Outstanding Interest Rate Maturity Date Mercantile Bank Capital Trust I $ 21,000,000 3 Month Libor + 218 bps September 16, 2034 Firstbank Capital Trust I $ 10,000,000 3 Month Libor + 199 bps October 18, 2034 Firstbank Capital Trust II $ 10,000,000 3 Month Libor + 127 bps April 7, 2036 Firstbank Capital Trust III $ 7,500,000 3 Month Libor + 135 bps July 30, 2037 Firstbank Capital Trust IV $ 7,500,000 3 Month Libor + 135 bps July 30, 2037
Schedule of Variable Interest Entities [Table Text Block]	Aggregate Assets Aggregate Liabilities Risk of Loss Trust preferred securities $ 58,100,000 $ 56,000,000 $ 2,100,000

Note 21 - Regulatory Matters (T

Note 21 - Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual Minimum Required for Capital Adequacy Purposes Minimum Required to be Well Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio 2022 Total capital (to risk weighted assets) Consolidated $ 634,729 14.0 % $ 362,675 8.0 % $ NA NA Bank 618,709 13.7 362,490 8.0 453,112 10.0 % Tier 1 capital (to risk weighted assets) Consolidated 503,855 11.1 272,007 6.0 NA NA Bank 576,463 12.7 271,868 6.0 362,490 8.0 Common equity (to risk weighted assets) Consolidated 456,970 10.1 204,005 4.5 NA NA Bank 576,463 12.7 203,901 4.5 294,523 6.5 Tier 1 capital (to average assets) Consolidated 503,855 10.1 199,647 4.0 NA NA Bank 576,463 11.6 199,563 4.0 249,453 5.0 2021 Total capital (to risk weighted assets) Consolidated $ 565,143 14.0 % $ 324,101 8.0 % $ NA NA Bank 551,760 13.6 323,928 8.0 404,910 10.0 % Tier 1 capital (to risk weighted assets) Consolidated 456,133 11.3 243,076 6.0 NA NA Bank 516,397 12.8 242,946 6.0 323,928 8.0 Common equity (to risk weighted assets) Consolidated 409,963 10.1 182,307 4.5 NA NA Bank 516,397 12.8 182,210 4.5 263,192 6.5 Tier 1 capital (to average assets) Consolidated 456,133 9.2 198,574 4.0 NA NA Bank 516,397 10.4 198,510 4.0 248,137 5.0

Note 22 - Mercantile Bank Cor_2

Note 22 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Condensed Balance Sheet [Table Text Block]	2022 2021 ASSETS Cash and cash equivalents $ 18,633,000 $ 14,570,000 Investment in bank subsidiary 543,599,000 545,691,000 Other assets 19,786,000 19,576,000 Total assets $ 582,018,000 $ 579,837,000 LIABILITIES AND SHAREHOLDERS EQUITY Liabilities $ 3,024,000 $ 1,388,000 Subordinated debentures 48,958,000 48,244,000 Subordinated notes 88,628,000 73,646,000 Shareholders’ equity 441,408,000 456,559,000 Total liabilities and shareholders’ equity $ 582,018,000 $ 579,837,000
Condensed Income Statement [Table Text Block]	2022 2021 2020 Income Interest and dividends from subsidiaries $ 26,056,000 $ 39,058,000 $ 32,588,000 Total income 26,056,000 39,058,000 32,588,000 Expenses Interest expense 6,104,000 1,934,000 2,268,000 Other operating expenses 5,645,000 5,831,000 4,441,000 Total expenses 11,749,000 7,765,000 6,709,000 Income before income tax benefit and equity in undistributed net income of subsidiary 14,307,000 31,293,000 25,879,000 Federal income tax benefit (2,535,000 ) (1,653,000 ) (1,173,000 ) Equity in undistributed net income of subsidiary 44,221,000 26,075,000 17,086,000 Net income $ 61,063,000 $ 59,021,000 $ 44,138,000 Comprehensive income (loss) $ (549,000 ) $ 49,806,000 $ 45,929,000
Condensed Cash Flow Statement [Table Text Block]	2022 2021 2020 Cash flows from operating activities Net income $ 61,063,000 $ 59,021,000 $ 44,138,000 Adjustments to reconcile net income to net cash from operating activities: Equity in undistributed net income of subsidiary (44,221,000 ) (26,075,000 ) (17,086,000 ) Stock-based compensation expense 3,377,000 3,784,000 2,325,000 Stock grants to directors for retainer fees 359,000 344,000 394,000 Change in other assets 858,000 49,000 (227,000 ) Change in other liabilities 1,636,000 (5,000 ) 812,000 Net cash from operating activities 23,072,000 37,118,000 30,356,000 Cash flows from investing activities Net capital investment into subsidiaries (15,000,000 ) (70,000,000 ) 0 Net cash for investing activities (15,000,000 ) (70,000,000 ) 0 Cash flows from financing activities Stock option exercises, net of cashless exercises 36,000 50,000 3,000 Employee stock purchase plan 45,000 48,000 49,000 Dividend reinvestment plan 867,000 877,000 814,000 Net proceeds from subordinated notes issuance 14,645,000 73,635,000 0 Repurchase of common shares 0 (21,380,000 ) (6,591,000 ) Cash dividends on common stock (19,602,000 ) (18,524,000 ) (17,930,000 ) Net cash (for) from financing activities (4,009,000 ) 34,706,000 (23,655,000 ) Net change in cash and cash equivalents 4,063,000 1,824,000 6,701,000 Cash and cash equivalents at beginning of period 14,570,000 12,746,000 6,045,000 Cash and cash equivalents at end of period $ 18,633,000 $ 14,570,000 $ 12,746,000

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 08, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 01, 2014 USD ($)
Number of Unconsolidated Business Trusts Formed to Issue Trust Preferred Securities	5
Financing Receivable, before Allowance for Credit Loss, Total	$ 3,916,619,000		$ 3,453,459,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance	0
Financing Receivable, Unamortized Loan Cost (Fee)	$ (1,000,000)		2,500,000
Interest Income on Commercial and Mortgage Loans Discontinued Period (Day)	90 days
Maximum Delinquency Period for Consumer and Credit Card Loans to be Charged Off (Day)	120 days
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 42,246,000		35,363,000		$ 37,967,000		$ 23,889,000
Retained Earnings (Accumulated Deficit), Total	216,313,000		174,536,000
Financing Receivable, Allowance for Credit Loss, Allowance Reduction	(900,000)
Repossessed Assets, Total	$ 0		0
Core Deposits [Member]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)	10 years
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ (400,000)
Retained Earnings (Accumulated Deficit), Total		$ 300,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Other Assets [Member]
Deferred Income Tax Assets, Net		$ 100,000
Not Designated as Hedging Instrument [Member] | Mortgage Loan Derivative [Member]
Derivative Asset, Total	100,000		300,000
Commercial Loan [Member]
Loan Participation, Amount	$ 33,500,000		$ 24,200,000
SBA, CARES Act, Paycheck Protection Program [Member]
Number of Loans Originated Under the Paycheck Protection Program						2,200
Financing Receivable, before Allowance for Credit Loss, Total						$ 554,000,000
Financing Receivable, Not Yet Forgiven, Number of Loans	5
Financing Receivable, Not Yet Forgiven	$ 500,000
Amortization of Deferred Loan Origination Fees, Net	$ 100,000
SBA, CARES Act, Paycheck Protection Program, Round Two [Member]
Number of Loans Originated Under the Paycheck Protection Program				1,200
Financing Receivable, before Allowance for Credit Loss, Total				$ 209,000,000
Financing Receivable, Not Yet Forgiven, Number of Loans	6
Financing Receivable, Not Yet Forgiven	$ 400,000
Amortization of Deferred Loan Origination Fees, Net	$ 1,000,000
Firstbank Corporation [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total								$ 1,500,000,000
Business Combination Branches Acquired								46

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Year-end Mortgage Loans Held for Sale (Details) - Mortgage Loans [Member] - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Mortgage loans held for sale	$ 3,565,000	$ 16,117,000
Less: Allowance to adjust to lower of cost or market	0	0
Mortgage loans held for sale, net	$ 3,565,000	$ 16,117,000

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Noninterest Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Service Charges on Deposit and Sweep Accounts [Member]
Noninterest revenue	$ 5,952,000	$ 5,078,000	$ 4,578,000
Credit and Debit Card [Member]
Noninterest revenue	8,216,000	7,516,000	5,973,000
Payroll Processing [Member]
Noninterest revenue	2,178,000	1,815,000	1,745,000
Customer Service [Member]
Noninterest revenue	$ 852,000	$ 857,000	$ 757,000

Note 2 - Securities (Details Te

Note 2 - Securities (Details Textual)	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	732	333
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total	$ 573,146,000	$ 461,553,000
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total	83,281,000	9,958,000
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	0	0
Proceeds from Sale of Debt Securities, Available-for-Sale	0	0	$ 0
Debt Securities, Available-for-Sale, Amortized Cost, Total	685,646,000	597,463,000
Debt Securities, Available-for-Sale, Total	602,936,000	592,743,000
Bonds Issued or Guaranteed by Agencies of the U.S. Federal Government [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total	71,200,000
Bonds Issued by State-based Municipalities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total	12,100,000
State of Michigan and All Its Political Subdivisions [Member]
Debt Securities, Available-for-Sale, Amortized Cost, Total	193,000,000	155,000,000
Debt Securities, Available-for-Sale, Total	182,000,000	158,000,000
All Other States and Their Political Subdivisions [Member]
Debt Securities, Available-for-Sale, Amortized Cost, Total	0	1,700,000
Debt Securities, Available-for-Sale, Total		1,700,000
US Government Agency Debt Obligations and Mortgage Backed Securities [Member]
Debt Securities, Available-for-Sale, Restricted	$ 194,000,000	$ 197,000,000

Note 2 - Securities - Available

Note 2 - Securities - Available-for-sale Securities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Amortized cost	$ 685,646,000	$ 597,463,000
Securities available for sale, gross unrealized gains	571,000	5,238,000
Securities available for sale, gross unrealized losses	(83,281,000)	(9,958,000)
Fair value	602,936,000	592,743,000
US Government Agencies Debt Securities [Member]
Amortized cost	453,836,000	398,874,000
Securities available for sale, gross unrealized gains	0	266,000
Securities available for sale, gross unrealized losses	(65,092,000)	(8,769,000)
Fair value	388,744,000	390,371,000
Collateralized Mortgage-Backed Securities [Member]
Amortized cost	38,002,000	41,906,000
Securities available for sale, gross unrealized gains	19,000	549,000
Securities available for sale, gross unrealized losses	(6,068,000)	(652,000)
Fair value	31,953,000	41,803,000
Municipal General Obligation Bonds [Member]
Amortized cost	163,041,000	133,894,000
Securities available for sale, gross unrealized gains	450,000	4,092,000
Securities available for sale, gross unrealized losses	(9,058,000)	(392,000)
Fair value	154,433,000	137,594,000
Municipal Revenue Bonds [Member]
Amortized cost	30,267,000	22,289,000
Securities available for sale, gross unrealized gains	102,000	331,000
Securities available for sale, gross unrealized losses	(3,063,000)	(145,000)
Fair value	27,306,000	22,475,000
Other Debt and Equity Securities [Member]
Amortized cost	500,000	500,000
Securities available for sale, gross unrealized gains	0	0
Securities available for sale, gross unrealized losses	0	0
Fair value	$ 500,000	$ 500,000

Note 2 - Securities - Securitie

Note 2 - Securities - Securities in a Continuous Loss Position (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Securities available for sale, continuous unrealized loss position, less than 12 months	$ 193,930,000	$ 351,062,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	17,438,000	6,455,000
Securities available for sale, continuous unrealized loss position, 12 months or more	379,216,000	110,491,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	65,843,000	3,503,000
Securities available for sale, continuous unrealized loss position	573,146,000	461,553,000
Securities available for sale, continuous unrealized loss position, unrealized loss	83,281,000	9,958,000
US Government Agencies Debt Securities [Member]
Securities available for sale, continuous unrealized loss position, less than 12 months	53,019,000	274,287,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	5,713,000	5,274,000
Securities available for sale, continuous unrealized loss position, 12 months or more	335,725,000	110,053,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	59,379,000	3,495,000
Securities available for sale, continuous unrealized loss position	388,744,000	384,340,000
Securities available for sale, continuous unrealized loss position, unrealized loss	65,092,000	8,769,000
Collateralized Mortgage-Backed Securities [Member]
Securities available for sale, continuous unrealized loss position, less than 12 months	31,127,000	23,184,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	6,068,000	652,000
Securities available for sale, continuous unrealized loss position, 12 months or more	12,000	24,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	31,139,000	23,208,000
Securities available for sale, continuous unrealized loss position, unrealized loss	6,068,000	652,000
Municipal General Obligation Bonds [Member]
Securities available for sale, continuous unrealized loss position, less than 12 months	97,252,000	40,748,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	4,516,000	392,000
Securities available for sale, continuous unrealized loss position, 12 months or more	32,870,000	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	4,542,000	0
Securities available for sale, continuous unrealized loss position	130,122,000	40,748,000
Securities available for sale, continuous unrealized loss position, unrealized loss	9,058,000	392,000
Municipal Revenue Bonds [Member]
Securities available for sale, continuous unrealized loss position, less than 12 months	12,532,000	12,843,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	1,141,000	137,000
Securities available for sale, continuous unrealized loss position, 12 months or more	10,609,000	414,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	1,922,000	8,000
Securities available for sale, continuous unrealized loss position	23,141,000	13,257,000
Securities available for sale, continuous unrealized loss position, unrealized loss	3,063,000	145,000
Other Debt and Equity Securities [Member]
Securities available for sale, continuous unrealized loss position, less than 12 months	0	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	0	0
Securities available for sale, continuous unrealized loss position, unrealized loss	$ 0	$ 0

Note 2 - Securities - Debt Secu

Note 2 - Securities - Debt Securities by Maturity (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Due in one year or less, weighted average yield	0.76%
Due in one year or less, amortized cost	$ 21,278,000
Due in one year or less, fair value	$ 20,732,000
Due from one to five years, weighted average yield	1.22%
Due from one to five years, amortized cost	$ 249,262,000
Due from one to five years, fair value	$ 227,357,000
Due from five to ten years, weighted average yield	1.88%
Due from five to ten years, amortized cost	$ 318,700,000
Due from five to ten years, fair value	$ 271,652,000
Due after ten years, weighted average yield	3.03%
Due after ten years, amortized cost	$ 57,904,000
Due after ten years, fair value	$ 50,742,000
Weighted average yield	1.72%
Amortized cost	$ 685,646,000	$ 597,463,000
Fair value	$ 602,936,000	592,743,000
Collateralized Mortgage-Backed Securities [Member]
No single maturity, weighted average yield	2.10%
No single maturity, amortized cost	$ 38,002,000
No single maturity, fair value	31,953,000
Amortized cost	38,002,000	41,906,000
Fair value	$ 31,953,000	41,803,000
Other Debt and Equity Securities [Member]
No single maturity, weighted average yield	4.94%
No single maturity, amortized cost	$ 500,000
No single maturity, fair value	500,000
Amortized cost	500,000	500,000
Fair value	$ 500,000	$ 500,000

Note 3 - Loans and Allowance _3

Note 3 - Loans and Allowance for Credit Losses (Details Textual) - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2020	Aug. 08, 2020	Dec. 31, 2019
Financing Receivable, before Allowance for Credit Loss, Total		$ 3,453,459,000	$ 3,916,619,000
Financing Receivable, Accruing Trouble Debt Restructurings, Interest Income		1,500,000
Interest Lost on Nonaccrual Loans		100,000
Maximum [Member]
Interest Lost on Nonaccrual Loans		100,000
Collateral Dependent Loans [Member]
Financing Receivable, before Allowance for Credit Loss, Total			7,700,000
SBA, CARES Act, Paycheck Protection Program [Member]
Financing Receivable, before Allowance for Credit Loss, Total						$ 554,000,000
Commercial Portfolio Segment [Member]
Financing Receivable, before Allowance for Credit Loss, Total		2,950,424,000	3,131,830,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, before Allowance for Credit Loss, Total	[1]	1,137,419,000	1,185,083,000
Financing Receivable, Troubled Debt Restructuring		4,973,000	8,672,000		$ 6,414,000		$ 8,587,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 1-4 [Member]
Financing Receivable, before Allowance for Credit Loss, Total	[2]	729,224,000	719,583,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | SBA, CARES Act, Paycheck Protection Program [Member]
Financing Receivable, before Allowance for Credit Loss, Total		40,100,000	900,000		365,000,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | SBA, CARES Act, Paycheck Protection Program [Member] | Grades 1-4 [Member]
Financing Receivable, before Allowance for Credit Loss, Total		40,100,000	900,000
Retail Portfolio Segment [Member]
Financing Receivable, before Allowance for Credit Loss, Total		503,035,000	784,789,000
Retail Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, before Allowance for Credit Loss, Total		29,500,000	37,400,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Financing Receivable, before Allowance for Credit Loss, Total	[3]	60,488,000	29,753,000
Financing Receivable, Troubled Debt Restructuring		1,202,000	1,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Troubled Debt Restructuring				$ (1,200,000)
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Financing Receivable, before Allowance for Credit Loss, Total		442,547,000	755,036,000
Financing Receivable, Troubled Debt Restructuring		$ 627,000	$ 2,736,000		$ 806,000		$ 724,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Troubled Debt Restructuring				$ 1,200,000
[1]For December 31, 2022, and December 31, 2021, includes $0.9 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.[2]Included in Commercial and Industrial Loans Grades 1 – 4 are $40.1 million of loans originated under the Paycheck Protection Program.[3]In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $37.4 million and $29.5 million as of December 31, 2022, and 2021, respectively.

Note 3 - Loans and Allowance _4

Note 3 - Loans and Allowance for Credit Losses - Components of Loan Portfolio (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Loans		$ 3,916,619,000	$ 3,453,459,000
Percent of portfolio		100%	100%
Period increase (decrease)		13.40%
Commercial Portfolio Segment [Member]
Loans		$ 3,131,830,000	$ 2,950,424,000
Percent of portfolio		80%	85.40%
Period increase (decrease)		6.10%
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[1]	$ 1,185,083,000	$ 1,137,419,000
Percent of portfolio	[1]	30.30%	32.90%
Period increase (decrease)	[1]	4.20%
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		$ 61,873,000	$ 43,239,000
Percent of portfolio		1.60%	1.30%
Period increase (decrease)		43.10%
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		$ 639,192,000	$ 565,758,000
Percent of portfolio		16.30%	16.40%
Period increase (decrease)		13%
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		$ 1,033,734,000	$ 1,027,415,000
Percent of portfolio		26.40%	29.70%
Period increase (decrease)		0.60%
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		$ 211,948,000	$ 176,593,000
Percent of portfolio		5.40%	5.10%
Period increase (decrease)		20%
Retail Portfolio Segment [Member]
Loans		$ 784,789,000	$ 503,035,000
Percent of portfolio		20%	14.60%
Period increase (decrease)		56%
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans		$ 755,036,000	$ 442,547,000
Percent of portfolio		19.30%	12.80%
Period increase (decrease)		70.60%
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	[2]	$ 29,753,000	$ 60,488,000
Percent of portfolio	[2]	0.70%	1.80%
Period increase (decrease)	[2]	(50.80%)
[1]For December 31, 2022, and December 31, 2021, includes $0.9 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.[2]In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $37.4 million and $29.5 million as of December 31, 2022, and 2021, respectively.

Note 3 - Loans and Allowance _5

Note 3 - Loans and Allowance for Loan Losses - Concentrations Within the Loan Portfolio (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, before Allowance for Credit Loss, Total	$ 3,916,619,000	$ 3,453,459,000
Percent of portfolio	100%	100%
Commercial Real Estate Loans to Lessors of Non Residential Buildings [Member]
Financing Receivable, before Allowance for Credit Loss, Total	$ 738,891,000	$ 737,589,000
Percent of portfolio	18.90%	21.40%

Note 3 - Loans and Allowance _6

Note 3 - Loans and Allowance for Credit Losses - Nonperforming Loans (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Loans past due 90 days or more still accruing interest	$ 0	$ 155,000
Commercial Portfolio Segment [Member]
Loans past due 90 days or more still accruing interest	0	155,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans past due 90 days or more still accruing interest	0	155,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans past due 90 days or more still accruing interest	0	0
Nonperforming Financial Instruments [Member]
Loans past due 90 days or more still accruing interest	0	155,000
Nonaccrual loans	7,728,000	2,313,000
Total nonperforming loans	7,728,000	2,468,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Total nonperforming loans	6,272,000	663,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Total nonperforming loans	6,024,000	663,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Total nonperforming loans	0	0
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Total nonperforming loans	248,000	0
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Total nonperforming loans	0	0
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Total nonperforming loans	0	0
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member]
Total nonperforming loans	1,456,000	1,805,000
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Total nonperforming loans	1,456,000	1,686,000
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Total nonperforming loans	$ 0	$ 119,000

Note 3 - Loans and Allowance _7

Note 3 - Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, before Allowance for Credit Loss, Total		$ 3,916,619,000	$ 3,453,459,000
Loans past due 90 days or more still accruing interest		0	155,000
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,349,000	1,424,000
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		6,042,000	243,000
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		365,000	295,000
Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		7,756,000	1,962,000
Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		3,908,863,000	3,451,497,000
Commercial Portfolio Segment [Member]
Financing Receivable, before Allowance for Credit Loss, Total		3,131,830,000	2,950,424,000
Loans past due 90 days or more still accruing interest		0	155,000
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	27,000
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		5,953,000	0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		249,000	193,000
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		6,202,000	220,000
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		3,125,628,000	2,950,204,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, before Allowance for Credit Loss, Total	[1]	1,185,083,000	1,137,419,000
Loans past due 90 days or more still accruing interest		0	155,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	14,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		5,705,000	0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		249,000	193,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		5,954,000	207,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,179,129,000	1,137,212,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Financing Receivable, before Allowance for Credit Loss, Total		61,873,000	43,239,000
Loans past due 90 days or more still accruing interest		0	0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	13,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	13,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		61,873,000	43,226,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Financing Receivable, before Allowance for Credit Loss, Total		639,192,000	565,758,000
Loans past due 90 days or more still accruing interest		0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		248,000	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		248,000	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		638,944,000	565,758,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,033,734,000	1,027,415,000
Loans past due 90 days or more still accruing interest		0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,033,734,000	1,027,415,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Financing Receivable, before Allowance for Credit Loss, Total		211,948,000	176,593,000
Loans past due 90 days or more still accruing interest		0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		211,948,000	176,593,000
Retail Portfolio Segment [Member]
Financing Receivable, before Allowance for Credit Loss, Total		784,789,000	503,035,000
Loans past due 90 days or more still accruing interest		0	0
Retail Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,349,000	1,397,000
Retail Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		89,000	243,000
Retail Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		116,000	102,000
Retail Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,554,000	1,742,000
Retail Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		783,235,000	501,293,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Financing Receivable, before Allowance for Credit Loss, Total		755,036,000	442,547,000
Loans past due 90 days or more still accruing interest		0	0
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,334,000	1,265,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		88,000	241,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		116,000	82,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,538,000	1,588,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		753,498,000	440,959,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Financing Receivable, before Allowance for Credit Loss, Total	[2]	29,753,000	60,488,000
Loans past due 90 days or more still accruing interest		0	0
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		15,000	132,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		1,000	2,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		0	20,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		16,000	154,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, before Allowance for Credit Loss, Total		$ 29,737,000	$ 60,334,000
[1]For December 31, 2022, and December 31, 2021, includes $0.9 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.[2]In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $37.4 million and $29.5 million as of December 31, 2022, and 2021, respectively.

Note 3 - Loans and Allowance _8

Note 3 - Loans and Allowance for Loan Losses - Nonaccrual Loans (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
With no related allowance recorded, principal balance	$ 1,313,000	$ 15,715,000
With related allowance recorded, principal balance	6,415,000	3,651,000
Related allowance	2,283,000	546,000
Total principal balance	7,728,000	19,366,000
Commercial Portfolio Segment [Member]
With no related allowance recorded, principal balance	249,000	12,583,000
With related allowance recorded, principal balance	6,023,000	3,099,000
Related allowance	2,083,000	354,000
Total principal balance	6,272,000	15,682,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
With no related allowance recorded, principal balance	249,000	2,818,000
With related allowance recorded, principal balance	5,775,000	2,192,000
Related allowance	2,051,000	266,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
With no related allowance recorded, principal balance	0	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
With no related allowance recorded, principal balance	0	9,674,000
With related allowance recorded, principal balance	248,000	761,000
Related allowance	32,000	84,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
With no related allowance recorded, principal balance	0	0
With related allowance recorded, principal balance	0	146,000
Related allowance	0	4,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
With no related allowance recorded, principal balance	0	91,000
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Retail Portfolio Segment [Member]
With no related allowance recorded, principal balance	1,064,000	3,132,000
With related allowance recorded, principal balance	392,000	552,000
Related allowance	200,000	192,000
Total principal balance	1,456,000	3,684,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
With no related allowance recorded, principal balance	1,064,000	2,025,000
With related allowance recorded, principal balance	392,000	412,000
Related allowance	200,000	$ 69,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
With no related allowance recorded, principal balance	0
With related allowance recorded, principal balance	0
Related allowance	$ 0

Note 3 - Loans and Allowance _9

Note 3 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022
With no related allowance recorded, unpaid principal balance	$ 16,997,000
With no related allowance recorded, principal balance	15,715,000	$ 1,313,000
With no related allowance recorded, average recorded principal balance	19,857,000
With related allowance recorded, unpaid principal balance	3,671,000
With related allowance recorded, principal balance	3,651,000	6,415,000
Related allowance	546,000	2,283,000
With related allowance recorded, average recorded principal balance	3,440,000
Total unpaid principal balance	20,668,000
Total principal balance	19,366,000	7,728,000
Total average recorded principal balance	23,297,000
Commercial Portfolio Segment [Member]
With no related allowance recorded, unpaid principal balance	12,658,000
With no related allowance recorded, principal balance	12,583,000	249,000
With no related allowance recorded, average recorded principal balance	16,434,000
With related allowance recorded, unpaid principal balance	3,099,000
With related allowance recorded, principal balance	3,099,000	6,023,000
Related allowance	354,000	2,083,000
With related allowance recorded, average recorded principal balance	2,689,000
Total unpaid principal balance	15,757,000
Total principal balance	15,682,000	6,272,000
Total average recorded principal balance	19,123,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
With no related allowance recorded, unpaid principal balance	2,893,000
With no related allowance recorded, principal balance	2,818,000	249,000
With no related allowance recorded, average recorded principal balance	3,632,000
With related allowance recorded, unpaid principal balance	2,192,000
With related allowance recorded, principal balance	2,192,000	5,775,000
Related allowance	266,000	2,051,000
With related allowance recorded, average recorded principal balance	1,732,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
With no related allowance recorded, unpaid principal balance	0
With no related allowance recorded, principal balance	0	0
With no related allowance recorded, average recorded principal balance	0
With related allowance recorded, unpaid principal balance	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
With related allowance recorded, average recorded principal balance	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
With no related allowance recorded, unpaid principal balance	9,674,000
With no related allowance recorded, principal balance	9,674,000	0
With no related allowance recorded, average recorded principal balance	12,634,000
With related allowance recorded, unpaid principal balance	761,000
With related allowance recorded, principal balance	761,000	248,000
Related allowance	84,000	32,000
With related allowance recorded, average recorded principal balance	803,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
With no related allowance recorded, unpaid principal balance	0
With no related allowance recorded, principal balance	0	0
With no related allowance recorded, average recorded principal balance	131,000
With related allowance recorded, unpaid principal balance	146,000
With related allowance recorded, principal balance	146,000	0
Related allowance	4,000	0
With related allowance recorded, average recorded principal balance	154,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
With no related allowance recorded, unpaid principal balance	91,000
With no related allowance recorded, principal balance	91,000	0
With no related allowance recorded, average recorded principal balance	37,000
With related allowance recorded, unpaid principal balance	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
With related allowance recorded, average recorded principal balance	0
Retail Portfolio Segment [Member]
With no related allowance recorded, unpaid principal balance	4,339,000
With no related allowance recorded, principal balance	3,132,000	1,064,000
With no related allowance recorded, average recorded principal balance	3,423,000
With related allowance recorded, unpaid principal balance	572,000
With related allowance recorded, principal balance	552,000	392,000
Related allowance	192,000	200,000
With related allowance recorded, average recorded principal balance	751,000
Total unpaid principal balance	4,911,000
Total principal balance	3,684,000	1,456,000
Total average recorded principal balance	4,174,000
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
With no related allowance recorded, unpaid principal balance	1,173,000
With no related allowance recorded, principal balance	1,107,000
With no related allowance recorded, average recorded principal balance	1,096,000
With related allowance recorded, unpaid principal balance	160,000
With related allowance recorded, principal balance	140,000
Related allowance	123,000
With related allowance recorded, average recorded principal balance	214,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
With no related allowance recorded, unpaid principal balance	3,166,000
With no related allowance recorded, principal balance	2,025,000	1,064,000
With no related allowance recorded, average recorded principal balance	2,327,000
With related allowance recorded, unpaid principal balance	412,000
With related allowance recorded, principal balance	412,000	392,000
Related allowance	69,000	$ 200,000
With related allowance recorded, average recorded principal balance	$ 537,000

Note 3 - Loans and Allowance_10

Note 3 - Loans and Allowance for Credit Losses - Loans by Credit Quality Indicators (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Loans		$ 3,916,619,000	$ 3,453,459,000
Commercial Portfolio Segment [Member]
Loans		3,131,830,000	2,950,424,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[1]	1,185,083,000	1,137,419,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		61,873,000	43,239,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		639,192,000	565,758,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		1,033,734,000	1,027,415,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		211,948,000	176,593,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[2]	719,583,000	729,224,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		41,711,000	28,390,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		406,341,000	346,082,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		447,606,000	503,482,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		118,385,000	119,473,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans		450,405,000	398,378,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		20,057,000	14,730,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		229,766,000	208,060,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		573,728,000	511,280,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		93,514,000	56,968,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans		15,095,000	9,817,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		105,000	119,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		3,085,000	11,616,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		12,400,000	12,653,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		$ 49,000	$ 152,000
[1]For December 31, 2022, and December 31, 2021, includes $0.9 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.[2]Included in Commercial and Industrial Loans Grades 1 – 4 are $40.1 million of loans originated under the Paycheck Protection Program.

Note 3 - Loans and Allowance_11

Note 3 - Loans and Allowance for Credit Losses - Retail Credit Exposure (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Loans		$ 3,916,619,000	$ 3,453,459,000
Retail Portfolio Segment [Member]
Loans		784,789,000	503,035,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Loans		755,036,000	442,547,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	[1]	29,753,000	60,488,000
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | One to Four Family Mortgages [Member]
Loans		753,580,000	440,861,000
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Other Consumer Loans [Member]
Loans		29,753,000	60,369,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | One to Four Family Mortgages [Member]
Loans		1,456,000	1,686,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Consumer Loans [Member]
Loans		$ 0	$ 119,000
[1]In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $37.4 million and $29.5 million as of December 31, 2022, and 2021, respectively.

Note 3 - Loans and Allowance_12

Note 3 - Loans and Allowance for Credit Losses - Loan Vintage (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Year One, Originated, Current Fiscal Year		$ 1,343,470,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,016,338,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		538,303,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		149,061,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		79,881,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		115,181,000
Financing Receivable, Term Loan		3,242,234,000
Financing Receivable, Revolving		674,385,000
Loans		3,916,619,000	$ 3,453,459,000
Commercial Portfolio Segment [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		1,025,368,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		770,436,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		445,327,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		135,893,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		64,986,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		72,100,000
Financing Receivable, Term Loan		2,514,110,000
Financing Receivable, Revolving		617,720,000
Loans		3,131,830,000	2,950,424,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		271,061,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		188,760,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		75,658,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		18,064,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		3,847,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		9,973,000
Financing Receivable, Term Loan		567,363,000
Financing Receivable, Revolving		617,720,000
Loans	[1]	1,185,083,000	1,137,419,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		115,494,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		141,481,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		43,961,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		9,194,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		3,230,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		9,851,000
Financing Receivable, Term Loan		323,211,000
Financing Receivable, Revolving		396,372,000
Loans	[2]	719,583,000	729,224,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		151,783,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		47,030,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		31,697,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		8,870,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		569,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		93,000
Financing Receivable, Term Loan		240,042,000
Financing Receivable, Revolving		210,363,000
Loans		450,405,000	398,378,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		3,784,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		249,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		48,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		29,000
Financing Receivable, Term Loan		4,110,000
Financing Receivable, Revolving		10,985,000
Loans		15,095,000	9,817,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		42,026,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		14,956,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3,779,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		50,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,048,000
Financing Receivable, Term Loan		61,873,000
Financing Receivable, Revolving		0
Loans		61,873,000	43,239,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		31,756,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		6,196,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3,428,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		331,000
Financing Receivable, Term Loan		41,711,000
Financing Receivable, Revolving		0
Loans		41,711,000	28,390,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		10,270,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		8,760,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		351,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		50,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		626,000
Financing Receivable, Term Loan		20,057,000
Financing Receivable, Revolving		0
Loans		20,057,000	14,730,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		91,000
Financing Receivable, Term Loan		105,000
Financing Receivable, Revolving		0
Loans		105,000	119,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		312,711,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		169,701,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		87,587,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		29,915,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		31,951,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		7,327,000
Financing Receivable, Term Loan		639,192,000
Financing Receivable, Revolving		0
Loans		639,192,000	565,758,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		194,072,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		113,528,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		53,630,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		19,670,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		19,279,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		6,162,000
Financing Receivable, Term Loan		406,341,000
Financing Receivable, Revolving		0
Loans		406,341,000	346,082,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		115,720,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		56,173,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		33,913,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		10,245,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		12,550,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,165,000
Financing Receivable, Term Loan		229,766,000
Financing Receivable, Revolving		0
Loans		229,766,000	208,060,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		2,919,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		44,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		122,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		3,085,000
Financing Receivable, Revolving		0
Loans		3,085,000	11,616,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		319,253,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		333,057,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		229,076,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		79,396,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		23,535,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		49,417,000
Financing Receivable, Term Loan		1,033,734,000
Financing Receivable, Revolving		0
Loans		1,033,734,000	1,027,415,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		129,153,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		163,035,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		89,125,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		44,196,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		10,079,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		12,018,000
Financing Receivable, Term Loan		447,606,000
Financing Receivable, Revolving		0
Loans		447,606,000	503,482,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		183,388,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		164,334,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		139,951,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		35,200,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		13,456,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		37,399,000
Financing Receivable, Term Loan		573,728,000
Financing Receivable, Revolving		0
Loans		573,728,000	511,280,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		6,712,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		5,688,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		12,400,000
Financing Receivable, Revolving		0
Loans		12,400,000	12,653,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		80,317,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		63,962,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		49,227,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		8,468,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		5,639,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		4,335,000
Financing Receivable, Term Loan		211,948,000
Financing Receivable, Revolving		0
Loans		211,948,000	176,593,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		31,470,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		38,176,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		36,348,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		5,306,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		3,082,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		4,003,000
Financing Receivable, Term Loan		118,385,000
Financing Receivable, Revolving		0
Loans		118,385,000	119,473,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		48,847,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		25,786,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		12,879,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		3,162,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		2,557,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		283,000
Financing Receivable, Term Loan		93,514,000
Financing Receivable, Revolving		0
Loans		93,514,000	56,968,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		49,000
Financing Receivable, Term Loan		49,000
Financing Receivable, Revolving		0
Loans		49,000	152,000
Retail Portfolio Segment [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		318,102,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		245,902,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		92,976,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		13,168,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,895,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		43,081,000
Financing Receivable, Term Loan		728,124,000
Financing Receivable, Revolving		56,665,000
Loans		784,789,000	503,035,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		313,753,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		243,032,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		91,936,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		12,094,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,500,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		42,651,000
Financing Receivable, Term Loan		717,966,000
Financing Receivable, Revolving		37,070,000
Loans		755,036,000	442,547,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Performing Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		313,611,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		242,950,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		91,936,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		12,094,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,297,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		41,622,000
Financing Receivable, Term Loan		716,510,000
Financing Receivable, Revolving		37,070,000
Loans		753,580,000	440,861,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		142,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		82,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		203,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,029,000
Financing Receivable, Term Loan		1,456,000
Financing Receivable, Revolving		0
Loans		1,456,000	1,686,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		4,349,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		2,870,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,040,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,074,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		395,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		430,000
Financing Receivable, Term Loan		10,158,000
Financing Receivable, Revolving		19,595,000
Loans	[3]	29,753,000	60,488,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		4,349,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		2,870,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,040,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,074,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		395,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		430,000
Financing Receivable, Term Loan		10,158,000
Financing Receivable, Revolving		19,595,000
Loans		29,753,000	60,369,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		0
Financing Receivable, Revolving		0
Loans		$ 0	$ 119,000
[1]For December 31, 2022, and December 31, 2021, includes $0.9 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.[2]Included in Commercial and Industrial Loans Grades 1 – 4 are $40.1 million of loans originated under the Paycheck Protection Program.[3]In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $37.4 million and $29.5 million as of December 31, 2022, and 2021, respectively.

Note 3 - Loans and Allowance_13

Note 3 - Loans and Allowance for Credit Losses - Activity in Allowance for Loan Losses and the Recorded Investments in Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
Balance	$ 35,363,000	$ 37,967,000		$ 23,889,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	42,246,000	35,363,000		37,967,000
Provision for credit losses	6,550,000	(4,300,000)		14,050,000
Charge-offs	(292,000)	(1,044,000)		(838,000)
Recoveries	1,025,000	2,740,000		866,000
Balance	42,246,000	35,363,000		37,967,000
Ending balance: individually evaluated for impairment		546,000		551,000
Ending balance: collectively evaluated for impairment		34,817,000		37,416,000
Ending balance		3,413,349,000	[1]	2,828,211,000	[2]
Ending balance: individually evaluated for impairment		19,366,000	[1]	26,958,000	[2]
Ending balance: collectively evaluated for impairment		3,393,983,000	[1]	2,801,253,000	[2]
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(400,000)
Balance	(400,000)
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Balance	10,782,000	9,424,000		6,659,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	10,203,000	10,782,000		9,424,000
Provision for credit losses	946,000	2,030,000		2,921,000
Charge-offs	(171,000)	(882,000)		(247,000)
Recoveries	217,000	210,000		91,000
Balance	10,203,000	10,782,000		9,424,000
Ending balance: individually evaluated for impairment		266,000		53,000
Ending balance: collectively evaluated for impairment		10,516,000		9,371,000
Ending balance		1,097,309,000	[1]	780,164,000	[2]
Ending balance: individually evaluated for impairment		5,010,000	[1]	6,585,000	[2]
Ending balance: collectively evaluated for impairment		1,092,299,000	[1]	773,579,000	[2]
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(1,571,000)
Balance	(1,571,000)
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Balance	420,000	679,000		466,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	490,000	420,000		679,000
Provision for credit losses	138,000	(618,000)		289,000
Charge-offs	(29,000)	(15,000)		(113,000)
Recoveries	4,000	374,000		37,000
Balance	490,000	420,000		679,000
Ending balance: individually evaluated for impairment		0		0
Ending balance: collectively evaluated for impairment		420,000		679,000
Ending balance		43,239,000	[1]	55,055,000	[2]
Ending balance: individually evaluated for impairment		0	[1]	0	[2]
Ending balance: collectively evaluated for impairment		43,239,000	[1]	55,055,000	[2]
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(43,000)
Balance	(43,000)
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Balance	6,045,000	8,246,000		6,291,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	5,914,000	6,045,000		8,246,000
Provision for credit losses	378,000	(3,308,000)		1,881,000
Charge-offs	(38,000)	(12,000)		(235,000)
Recoveries	89,000	1,119,000		309,000
Balance	5,914,000	6,045,000		8,246,000
Ending balance: individually evaluated for impairment		84,000		77,000
Ending balance: collectively evaluated for impairment		5,961,000		8,169,000
Ending balance		565,758,000	[1]	529,953,000	[2]
Ending balance: individually evaluated for impairment		10,435,000	[1]	15,327,000	[2]
Ending balance: collectively evaluated for impairment		555,323,000	[1]	514,626,000	[2]
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(560,000)
Balance	(560,000)
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Balance	13,301,000	13,611,000		6,761,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	10,164,000	13,301,000		13,611,000
Provision for credit losses	(603,000)	(310,000)		6,837,000
Charge-offs	0	0		0
Recoveries	0	0		13,000
Balance	10,164,000	13,301,000		13,611,000
Ending balance: individually evaluated for impairment		0		8,000
Ending balance: collectively evaluated for impairment		13,301,000		13,603,000
Ending balance		1,027,415,000	[1]	917,436,000	[2]
Ending balance: individually evaluated for impairment		146,000	[1]	503,000	[2]
Ending balance: collectively evaluated for impairment		1,027,269,000	[1]	916,933,000	[2]
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(2,534,000)
Balance	(2,534,000)
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Balance	1,695,000	1,819,000		893,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,269,000	1,695,000		1,819,000
Provision for credit losses	152,000	(150,000)		907,000
Charge-offs	0	0		(18,000)
Recoveries	43,000	26,000		37,000
Balance	1,269,000	1,695,000		1,819,000
Ending balance: individually evaluated for impairment		4,000		0
Ending balance: collectively evaluated for impairment		1,691,000		1,819,000
Ending balance		176,593,000	[1]	146,095,000	[2]
Ending balance: individually evaluated for impairment		91,000	[1]	0	[2]
Ending balance: collectively evaluated for impairment		176,502,000	[1]	146,095,000	[2]
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(621,000)
Balance	(621,000)
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Balance	2,449,000	3,240,000		1,888,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	14,027,000	2,449,000		3,240,000
Provision for credit losses	5,621,000	(1,629,000)		1,168,000
Charge-offs	(33,000)	(92,000)		(129,000)
Recoveries	595,000	930,000		313,000
Balance	14,027,000	2,449,000		3,240,000
Ending balance: individually evaluated for impairment		69,000		172,000
Ending balance: collectively evaluated for impairment		2,380,000		3,068,000
Ending balance		442,547,000	[1]	337,888,000	[2]
Ending balance: individually evaluated for impairment		2,437,000	[1]	3,273,000	[2]
Ending balance: collectively evaluated for impairment		440,110,000	[1]	334,615,000	[2]
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	5,395,000
Balance	5,395,000
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Balance	626,000	889,000		861,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	160,000	626,000		889,000
Provision for credit losses	(111,000)	(301,000)		58,000
Charge-offs	(21,000)	(43,000)		(96,000)
Recoveries	77,000	81,000		66,000
Balance	160,000	626,000		889,000
Ending balance: individually evaluated for impairment		123,000		241,000
Ending balance: collectively evaluated for impairment		503,000		648,000
Ending balance		60,488,000	[1]	61,620,000	[2]
Ending balance: individually evaluated for impairment		1,247,000	[1]	1,270,000	[2]
Ending balance: collectively evaluated for impairment		59,241,000	[1]	60,350,000	[2]
Retail Portfolio Segment [Member] | Home Equity and Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(411,000)
Balance	(411,000)
Unallocated Financing Receivables [Member]
Balance	45,000	59,000		70,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	19,000	45,000		59,000
Provision for credit losses	29,000	(14,000)		(11,000)
Charge-offs	0	0		0
Recoveries	0	0		0
Balance	19,000	45,000		59,000
Ending balance: individually evaluated for impairment		0		0
Ending balance: collectively evaluated for impairment		$ 45,000		$ 59,000
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	(55,000)
Balance	$ (55,000)
[1]Excludes $40.1 million in loans originated under the Paycheck Protection Program.[2]Excludes $365 million in loans originated under the Paycheck Protection Program.

Note 3 - Loans and Allowance_14

Note 3 - Loans and Allowance for Credit Losses - Loans Modified as Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Contracts	10	18
Pre- Modification Recorded Principal Balance	$ 7,351,000	$ 4,333,000
Post- Modification Recorded Principal Balance	$ 7,350,000	$ 4,329,000
Commercial Portfolio Segment [Member]
Number of Contracts	3	12
Pre- Modification Recorded Principal Balance	$ 6,593,000	$ 3,802,000
Post- Modification Recorded Principal Balance	$ 6,593,000	$ 3,801,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Number of Contracts	3	10
Pre- Modification Recorded Principal Balance	$ 6,593,000	$ 3,017,000
Post- Modification Recorded Principal Balance	$ 6,593,000	$ 3,016,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Number of Contracts	0	0
Pre- Modification Recorded Principal Balance	$ 0	$ 0
Post- Modification Recorded Principal Balance	$ 0	$ 0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Number of Contracts	0	1
Pre- Modification Recorded Principal Balance	$ 0	$ 692,000
Post- Modification Recorded Principal Balance	$ 0	$ 692,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Number of Contracts	0	0
Pre- Modification Recorded Principal Balance	$ 0	$ 0
Post- Modification Recorded Principal Balance	$ 0	$ 0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Number of Contracts	0	1
Pre- Modification Recorded Principal Balance	$ 0	$ 93,000
Post- Modification Recorded Principal Balance	$ 0	$ 93,000
Retail Portfolio Segment [Member]
Number of Contracts	7	6
Pre- Modification Recorded Principal Balance	$ 758,000	$ 531,000
Post- Modification Recorded Principal Balance	$ 757,000	$ 528,000
Retail Portfolio Segment [Member] | Home Equity Loan [Member]
Number of Contracts	0	4
Pre- Modification Recorded Principal Balance	$ 0	$ 485,000
Post- Modification Recorded Principal Balance	$ 0	$ 482,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Number of Contracts	7	2
Pre- Modification Recorded Principal Balance	$ 758,000	$ 46,000
Post- Modification Recorded Principal Balance	$ 757,000	$ 46,000

Note 3 - Loans and Allowance_15

Note 3 - Loans and Allowance for Loan Losses - Loans Modified As Troubled Debt Restructurings Within the Previous Twelve Months That Became Over 30 Days Past Due (Details)	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Contracts	2	0
Recorded Principal Balance	$ 5,665,000	$ 0
Commercial Portfolio Segment [Member]
Number of Contracts	2	0
Recorded Principal Balance	$ 5,665,000	$ 0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Number of Contracts	2	0
Recorded Principal Balance	$ 5,665,000	$ 0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Retail Portfolio Segment [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Number of Contracts	0	0
Recorded Principal Balance	$ 0	$ 0

Note 3 - Loans and Allowance_16

Note 3 - Loans and Allowance for Loan Losses - Activity for Troubled Debt Restructurings (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Beginning Balance		$ 4,973,000		$ 6,414,000	$ 8,587,000
Charge-Offs		(95,000)		(17,000)	0
Payments		(772,000)		(4,278,000)	(11,260,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		4,566,000		2,854,000	9,087,000
Ending Balance		8,672,000		4,973,000	6,414,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Beginning Balance		0		0	85,000
Charge-Offs		0		0	0
Payments		0		0	(85,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		0		0	0
Ending Balance		0		0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Beginning Balance		10,435,000		14,797,000	1,145,000
Charge-Offs		(39,000)		0	0
Payments		(9,683,000)		(5,048,000)	(3,765,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		(669,000)		686,000	17,417,000
Ending Balance		44,000		10,435,000	14,797,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Beginning Balance		146,000		480,000	178,000
Charge-Offs		0		0	0
Payments		(16,000)		(334,000)	(585,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		0		0	887,000
Ending Balance		130,000		146,000	480,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Beginning Balance		91,000		0	7,000
Charge-Offs		0		0	0
Payments		(91,000)		(1,000)	(7,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		0		92,000	0
Ending Balance		0		91,000	0
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Beginning Balance		1,202,000
Charge-Offs		0
Payments		(14,000)
Transfers to ORE		0
Net Additions/Deletions	[1]	(1,187,000)
Ending Balance		1,000		1,202,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Beginning Balance		627,000		806,000	724,000
Charge-Offs		0		0	0
Payments		(317,000)		(224,000)	(68,000)
Transfers to ORE		0		0	0
Net Additions/Deletions		2,426,000	[1]	45,000	150,000
Ending Balance		2,736,000		627,000	806,000
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Beginning Balance		$ 1,202,000		1,146,000	1,415,000
Charge-Offs				0	0
Payments				(426,000)	(881,000)
Transfers to ORE				0	0
Net Additions/Deletions				482,000	612,000
Ending Balance				$ 1,202,000	$ 1,146,000
[1]Includes $1.2 million in the transfer of home equity lines of credit from other consumer loans to 1-4 family mortgages in association with the adoption of the CECL methodology effective January 1, 2022.

Note 4 - Premises and Equipme_3

Note 4 - Premises and Equipment, Net (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Depreciation, Total	$ 6,000,000	$ 5,800,000	$ 5,200,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	2 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.47%
Operating Lease, Expense	$ 1,300,000	1,200,000	$ 1,400,000
Premises and Equipment, Net [Member]
Operating Lease, Right-of-Use Asset	3,500,000	2,900,000
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 3,515,000	$ 2,800,000
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	3 years
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years

Note 4 - Premises and Equipme_4

Note 4 - Premises and Equipment, Net - Summary of Premises and Equipment (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Property, plant and equipment, gross	$ 90,338,000	$ 94,253,000
Less: accumulated depreciation	38,862,000	36,955,000
Total premises and equipment	51,476,000	57,298,000
Land and Land Improvements [Member]
Property, plant and equipment, gross	13,532,000	15,111,000
Building [Member]
Property, plant and equipment, gross	53,865,000	56,168,000
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 22,941,000	$ 22,974,000

Note 4 - Premises and Equipme_5

Note 4 - Premises and Equipment, Net - Future Lease Payments (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
2023	$ 1,091,000
2024	883,000
2025	443,000
2026	339,000
2027	288,000
Thereafter	1,589,000
Total undiscounted lease payments	4,633,000
Less effect of discounting	(1,118,000)
Other Liabilities [Member]
Present value of future lease payments (lease liability)	$ 3,515,000	$ 2,800,000

Note 5 - Mortgage Loan Servic_3

Note 5 - Mortgage Loan Servicing (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Continuing Involvement with Transferred Financial Assets Custodial Escrow Balance	$ 11,600	$ 12,100
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance, Ending Balance	0	0
Servicing Asset at Fair Value, Amount, Ending Balance	$ 17,700	$ 15,400
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	11.25%	8%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	6.60%	7.40%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Expected Credit Losses	0.28%	0.25%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life (Year)	8 years 10 months 24 days	8 years 6 months
Maximum [Member]
Late and Ancillary Fee Income Generated by Servicing Financial Assets, Amount	$ 100	$ 100

Note 5 - Mortgage Loan Servic_4

Note 5 - Mortgage Loan Servicing - Mortgage Loans Serviced for Others (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Mortgage loans serviced for others	$ 1,376,143,000	$ 1,344,055,000
Federal Home Loan Mortgage Corporation [Member]
Mortgage loans serviced for others	1,345,312,000	1,320,550,000
Federa lHome Loan Bank [Member]
Mortgage loans serviced for others	$ 30,831,000	$ 23,505,000

Note 5 - Mortgage Loan Servic_5

Note 5 - Mortgage Loan Servicing - Activity for Capitalized Mortgage Loan Servicing Rights (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance at beginning of year	$ 12,248,000	$ 8,189,000
Additions	2,773,000	7,711,000
Amortized to expense	(3,184,000)	(3,652,000)
Balance at end of year	$ 11,837,000	$ 12,248,000

Note 5 - Mortgage Loan Servic_6

Note 5 - Mortgage Loan Servicing - Estimated Amortization (Details)	Dec. 31, 2022 USD ($)
2023	$ 2,366,000
2024	2,066,000
2025	1,772,000
2026	1,492,000
2027	1,236,000
Thereafter	$ 2,905,000

Note 6 - Core Deposit Intangi_3

Note 6 - Core Deposit Intangible Asset, Net (Details Textual) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Core Deposits, Gross	$ 17,500,000	$ 17,500,000
Finite-Lived Intangible Assets, Accumulated Amortization	16,900,000	16,100,000
Finite-Lived Intangible Assets, Net, Ending Balance	$ 583,000	$ 1,351,000

Note 6 - Core Deposit Intangi_4

Note 6 - Core Deposit Intangible Asset, Net - Estimated Amortization Expense on Core Deposit Intangible Assets (Details)	Dec. 31, 2022 USD ($)
2023	$ 450,000
2024	$ 133,000

Note 7 - Deposits (Details Text

Note 7 - Deposits (Details Textual) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Time Deposits, at or Above FDIC Insurance Limit	$ 187	$ 207
Loans [Member]
Deposit Overdrafts	$ 0.9	$ 0.1

Note 7 - Deposits - Summary of

Note 7 - Deposits - Summary of Deposits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Noninterest-bearing	$ 1,604,750,000	$ 1,677,952,000
Noninterest-bearing demand, percentage	43.20%	41.10%
Noninterest-bearing demand, percent increase (decrease)	(4.40%)
Interest-bearing checking	$ 575,028,000	$ 538,838,000
Interest-bearing checking, percentage	15.50%	13.20%
Interest-bearing checking, percent increase (decrease)	6.70%
Money market	$ 776,723,000	$ 1,040,176,000
Money market, percentage	20.90%	25.50%
Money market, percent increase (decrease)	(25.30%)
Savings	$ 381,602,000	$ 394,330,000
Savings, percentage	10.30%	9.70%
Savings, percent increase (decrease)	(3.20%)
Local Time, under $100,000	$ 113,099,000	$ 132,776,000
Local Time, under $100,000, percentage	3%	3.20%
Local Time, under $100,000, percent increase (decrease)	(14.80%)
Local Time, $100,000 and over	$ 261,609,000	$ 275,208,000
Local Time, $100,000 and over, percentage	7.10%	6.70%
Local Time, $100,000 and over, percent increase (decrease)	(4.90%)
Total local deposits	$ 3,712,811,000	$ 4,059,280,000
Total local deposits, percentage	100%	99.40%
Total local deposits, percent increase (decrease)	(8.50%)
Out-of-area time, $100,000 and over	$ 0	$ 23,913,000
Out-of-area time, $100,000 and over, percentage	0%	0.60%
Out-of-area time, $100,000 and over, percent increase (decrease)	(100.00%)
Total deposits	$ 3,712,811,000	$ 4,083,193,000
Total deposits, percentage	100%	100%
Total deposits, percent increase (decrease)	(9.10%)

Note 7 - Deposits - Maturity Di

Note 7 - Deposits - Maturity Distribution for Certificate of Deposits (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
In one year or less	$ 188,887,000	$ 260,501,000
In one to two years	68,434,000	78,024,000
In two to three years	22,053,000	34,595,000
In three to four years	30,761,000	7,863,000
In four to five years	64,573,000	50,914,000
Total certificates of deposit	$ 374,708,000	$ 431,897,000

Note 7 - Deposits - Certificate

Note 7 - Deposits - Certificates of Deposit with Balances of $100,000 or More (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Up to three months	$ 40,538,000	$ 68,887,000
Three months to six months	25,141,000	53,077,000
Six months to twelve months	54,394,000	56,612,000
Over twelve months	141,536,000	120,545,000
Total certificates of deposit	$ 261,609,000	$ 299,121,000

Note 8 - Securities Sold Unde_3

Note 8 - Securities Sold Under Agreements to Repurchase (Details Textual)	12 Months Ended
	Dec. 31, 2022
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements (Year)	1 year

Note 8 - Securities Sold Unde_4

Note 8 - Securities Sold Under Agreements to Repurchase - Securities Sold Under Agreement to Repurchase (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Securities sold under agreements to repurchase	$ 194,340,000	$ 197,463,000
Average daily balance during the year	200,499,000	158,855,000
Maximum daily balance during the year	$ 235,577,000	$ 209,093,000
Securities Sold under Agreements to Repurchase [Member]
Weighted average interest rate at year-end	0.75%	0.11%
Weighted average interest rate during the year	0.15%	0.11%

Note 9 - Federal Home Loan Ba_3

Note 9 - Federal Home Loan Bank of Indianapolis Advances (Details Textual) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Long-Term Federal Home Loan Bank Advances, Total	$ 308,263,000	$ 374,000,000
Line of Credit Facility, Maximum Borrowing Capacity	1,030,000,000
Line of Credit Facility, Remaining Borrowing Capacity	713,000,000
Federal Home Loan Bank of Indianapolis [Member] | Bullet Advances [member]
Long-Term Federal Home Loan Bank Advances, Total	$ 280,000,000	$ 374,000,000
Federal Home Loan Bank of Indianapolis [Member] | Bullet Advances [member] | Minimum [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End	0.55%	0.55%
Federal Home Loan Bank of Indianapolis [Member] | Bullet Advances [member] | Maximum [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End	3.13%	3.18%
Federal Home Loan Bank of Indianapolis [Member] | Bullet Advances [member] | Weighted Average [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End	1.84%	2%
Federal Home Loan Bank of Indianapolis [Member] | Amortizing Advances [Member]
Long-Term Federal Home Loan Bank Advances, Total	$ 28,300,000	$ 0
Federal Home Loan Bank of Indianapolis [Member] | Amortizing Advances [Member] | Weighted Average [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Interest Rate at Period End	2.52%

Note 9 - Federal Home Loan Ba_4

Note 9 - Federal Home Loan Bank of Indianapolis Advances - Maturities of Currently Outstanding FHLBI Bullet Advances (Details) - Bullet Advances [member] - Federal Home Loan Bank of Indianapolis [Member]	Dec. 31, 2022 USD ($)
2023	$ 80,000,000
2024	80,000,000
2025	50,000,000
2026	30,000,000
2027	$ 40,000,000

Note 9 - Federal Home Loan Ba_5

Note 9 - Federal Home Loan Bank of Indianapolis Advances - Maturities of Currently Outstanding FHLBI Amortizing Advances (Details) - Federal Home Loan Bank of Indianapolis [Member] - Amortizing Advances [Member]	Dec. 31, 2022 USD ($)
2023	$ 353,000
2024	826,000
2025	862,000
2026	899,000
2027	938,000
Thereafter	$ 24,385,000

Note 10 - Federal Income Taxe_2

Note 10 - Federal Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21%	21%	21%
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0	$ 0

Note 10 - Federal Income Taxe_3

Note 10 - Federal Income Taxes - Consolidated Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current expense	$ 16,080,000	$ 12,675,000	$ 14,945,000
Deferred expense	(1,353,000)	2,020,000	(4,141,000)
Change in valuation allowance	0	0	(94,000)
Tax expense	$ 14,727,000	$ 14,695,000	$ 10,710,000

Note 10 - Federal Income Taxe_4

Note 10 - Federal Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Tax at statutory rate	$ 15,915,000	$ 15,481,000	$ 11,518,000
Tax-exempt interest	(695,000)	(658,000)	(681,000)
Bank owned life insurance	(334,000)	(233,000)	(238,000)
Change in valuation allowance	0	0	(94,000)
Other	(159,000)	105,000	205,000
Tax expense	$ 14,727,000	$ 14,695,000	$ 10,710,000

Note 10 - Federal Income Taxe_5

Note 10 - Federal Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses	$ 8,872,000	$ 7,426,000
Deferred compensation	232,000	259,000
Stock compensation	1,018,000	941,000
Nonaccrual loan interest income	136,000	159,000
Unrealized loss on securities	17,369,000	991,000
Lease liability	810,000	749,000
Deferred loan fees and costs	0	520,000
Other	494,000	595,000
Deferred tax asset	28,931,000	11,640,000
Depreciation	697,000	1,168,000
Prepaid expenses	504,000	416,000
Core deposit intangible	120,000	276,000
Mortgage loan servicing rights	2,486,000	2,572,000
Deferred loan fees and costs	211,000	0
Right of use lease asset	810,000	749,000
Business combination adjustments	1,877,000	2,013,000
Other	326,000	193,000
Deferred tax liability	7,031,000	7,387,000
Total net deferred tax asset	$ 21,900,000	$ 4,253,000

Note 11 - Stock-based Compens_3

Note 11 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions

9 Months Ended

12 Months Ended

24 Months Ended

36 Months Ended

Nov. 25, 2022

Jun. 09, 2022

May 26, 2022

May 27, 2021

Jun. 01, 2020

May 23, 2019

May 31, 2021

May 31, 2023

Dec. 31, 2022

May 31, 2022

Dec. 31, 2021

May 31, 2021

Dec. 31, 2020

May 31, 2020

Aug. 27, 2022

Dec. 31, 2016

Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)

66,000

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)

0

0

0

Stock Issued During Period, Shares, Issued for Services (in shares)

11,166

10,489

17,716

Noninterest Expense [Member]

Share-based Payment Arrangement, Expense

$ 3.4

$ 3.8

$ 2.3

Director [Member]

Stock Issued During Period, Shares, Issued for Services (in shares)

10,300

10,500

16,000

12,000

Share-based Payment Arrangement, Expense

$ 0.3

$ 0.3

$ 0.4

Director [Member] | Forecast [Member]

Share-based Payment Arrangement, Expense

$ 0.3

Corporate and Bank Board Members [Member]

Stock Issued During Period, Shares, Issued for Services (in shares)

1,700

Bank Board Members [Member]

Stock Issued During Period, Shares, Issued for Services (in shares)

300

600

Share-based Payment Arrangement, Expense

$ 0.1

Bank Board Members [Member] | Forecast [Member]

Share-based Payment Arrangement, Expense

$ 0.1

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)

3 years

Share-Based Payment Arrangement, Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)

2 years

Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent

110%

Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)

7 years

Performance Shares [Member] | Executive Officer [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

26,112

22,703

31,295

Performance Shares [Member] | Executive Officer [Member] | The 2021 Award [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

11,350

Performance Shares [Member] | Executive Officer [Member] | The 2020 Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

2,778

11,454

Performance Shares [Member] | Executive Officer [Member] | The 2019 Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

690

23,053

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)

13,709

Performance Shares [Member] | Executive Officer [Member] | The 2018 Awards [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

22,836

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)

14,681

Note 11 - Stock-based Compens_4

Note 11 - Stock-based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock [Member] - Mercantile Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Nonvested at beginning of year (in shares)	353,691	262,336	262,260
Nonvested at beginning of year (in dollars per share)	$ 30.71	$ 29.42	$ 34.91
Granted (in shares)	121,631	163,000	121,518
Granted (in dollars per share)	$ 32.18	$ 33.68	$ 24.65
Vested (in shares)	(94,010)	(59,772)	(85,445)
Vested (in dollars per share)	$ 34.86	$ 31.82	$ 37.08
Forfeited (in shares)	(6,541)	(11,873)	(35,997)
Forfeited (in dollars per share)	$ 27.98	$ 29.54	$ 33.71
Nonvested at end of year (in shares)	374,771	353,691	262,336
Nonvested at end of year (in dollars per share)	$ 30.49	$ 30.71	$ 29.42

Note 11 - Stock-based Compens_5

Note 11 - Stock-based Compensation - Summary of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	0
Exercised (in shares)	(1,355)	(2,000)	(753)
Mercantile Plans [Member]
Outstanding at beginning of year (in shares)	7,700	9,700	10,700
Outstanding at beginning of year, weighted average exercise price (in dollars per share)	$ 34.89	$ 32.83	$ 30.25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	0
Exercised (in shares)	(2,700)	(2,000)	(1,000)
Exercised, weighted average exercise price (in dollars per share)	$ 32.42	$ 24.91	$ 5.19
Forfeited or expired (in shares)	0	0	0
Outstanding at end of year (in shares)	5,000	7,700	9,700
Outstanding at end of year, weighted average exercise price (in dollars per share)	$ 36.22	$ 34.89	$ 32.83
Options exercisable at year-end (in shares)	5,000	7,700	9,700
Options exercisable at year-end, weighted average exercise price (in dollars per share)	$ 36.22	$ 34.89	$ 32.83

Note 11 - Stock-based Compens_6

Note 11 - Stock-based Compensation - Summary of Options Outstanding (Details) - Mercantile Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Minimum exercise price (in dollars per share)	$ 36.22	$ 27.66	$ 22.15
Maximum exercise price (in dollars per share)	$ 36.22	$ 36.22	$ 36.22
Outstanding Number (in shares)	5,000
Average remaining option term (Year)	10 months 24 days	1 year 8 months 12 days	2 years 4 months 24 days
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 36.22
Exercisable Number (in shares)	5,000
Exercisable Weighted Average Exercise Price (in dollars per share)		$ 36.22
Exercise Price Range 2 [Member]
Minimum exercise price (in dollars per share)	$ 36
Maximum exercise price (in dollars per share)	$ 37
Outstanding Number (in shares)	5,000
Average remaining option term (Year)	10 months 24 days
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 36.22
Exercisable Number (in shares)	5,000
Exercisable Weighted Average Exercise Price (in dollars per share)		$ 36.22

Note 11 - Stock-based Compens_7

Note 11 - Stock-based Compensation - Summary of Information Related to Options Outstanding (Details) - Mercantile Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Minimum exercise price (in dollars per share)	$ 36.22	$ 27.66	$ 22.15
Maximum exercise price (in dollars per share)	$ 36.22	$ 36.22	$ 36.22
Average remaining option term (Year)	10 months 24 days	1 year 8 months 12 days	2 years 4 months 24 days

Note 11 - Stock-based Compens_8

Note 11 - Stock-based Compensation - Summary of Stock Option Grants and Exercises (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Proceeds from stock option exercises, net of cashless exercises	$ 36,000	$ 50,000	$ 3,000
Mercantile Plans [Member]
Aggregate intrinsic value of stock options exercised	16,000	13,000	17,000
Proceeds from stock option exercises, net of cashless exercises	36,000	50,000	3,000
Tax benefit realized from stock option exercises	$ 0	$ 0	$ 0

Note 12 - Related Parties (Deta

Note 12 - Related Parties (Details Textual) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Deposits and Repurchase Agreements	$ 21,500,000	$ 18,400,000
Directors and Executive Officers [Member]
Loan Commitments to Related Parties	116,000,000	104,000,000
Loans and Leases Receivable, Related Parties, Ending Balance	$ 92,660,000	$ 87,672,000	$ 108,042,000

Note 12 - Related Parties - Loa

Note 12 - Related Parties - Loans Outstanding to Directors and Executive Officers (Details) - Directors and Executive Officers [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Beginning balance	$ 87,672,000	$ 108,042,000
New loans	10,619,000	2,542,000
Repayments	(5,631,000)	(22,912,000)
Ending balance	$ 92,660,000	$ 87,672,000

Note 13 - Commitments and Off_3

Note 13 - Commitments and Off-balance-sheet Risk (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 42,246,000	$ 35,363,000	$ 37,967,000	$ 23,889,000
Term Debt, Secured by Real Estate Balloon Payment, Period (Year)	5 years
Financing Receivable, before Allowance for Credit Loss, Total	$ 3,916,619,000	$ 3,453,459,000
London Interbank Offered Rate (LIBOR) [Member]
Financing Receivable, before Allowance for Credit Loss, Total	$ 368,000,000
Maximum [Member]
Amortization Period for Term Debt, Secured by Real Estate (Year)	25 years
Term Debt Secured, by Non-real Estate Collateral Maturity Period (Year)	7 years
Minimum [Member]
Amortization Period for Term Debt, Secured by Real Estate (Year)	10 years
Term Debt Secured, by Non-real Estate Collateral Maturity Period (Year)	3 years
Retail and Commercial Lines of Credit and Credit Card Receivables [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 100,000
Commercial Line of Credit Facilities [Member] | Maximum [Member]
Line of Credit Facility, Expiration Period (Month)	24 months
Commercial Line of Credit Facilities [Member] | Minimum [Member]
Line of Credit Facility, Expiration Period (Month)	12 months

Note 13 - Commitments and Off_4

Note 13 - Commitments and Off-balance Sheet Risk - Exposure to Credit Losses (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Contractual amounts of financial instruments with off-balance sheet risk	$ 1,908,294,000	$ 1,565,871,000
Standby Letters of Credit [Member]
Contractual amounts of financial instruments with off-balance sheet risk	23,539,000	33,109,000
Unused lines of Credit [Member] | Commercial Portfolio Segment [Member]
Contractual amounts of financial instruments with off-balance sheet risk	1,283,703,000	1,098,951,000
Unused lines of Credit [Member] | One to Four Family Mortgages [Member]
Contractual amounts of financial instruments with off-balance sheet risk	71,972,000	64,313,000
Unused lines of Credit [Member] | Consumer Credit Card [Member]
Contractual amounts of financial instruments with off-balance sheet risk	123,687,000	92,146,000
Unused lines of Credit [Member] | Consumer Other Financing Receivable 1 [Member]
Contractual amounts of financial instruments with off-balance sheet risk	75,747,000	64,876,000
Loan Origination Commitments [Member]
Contractual amounts of financial instruments with off-balance sheet risk	$ 329,646,000	$ 212,476,000

Note 13 - Commitments and Off_5

Note 13 - Commitments and Off-balance-sheet Risk - Instruments Carried at Fair Values (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Contractual amounts of financial instruments with off-balance sheet risk	$ 1,908,294,000	$ 1,565,871,000
Standby Letters of Credit [Member]
Standby letters of credit, contract amount	23,539,000	33,109,000
Contractual amounts of financial instruments with off-balance sheet risk	$ 108,000	$ 212,000

Note 14 - Benefit Plans (Detail

Note 14 - Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended			57 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay				5%
Defined Contribution Plan, Cost	$ 2.2	$ 2.1	$ 1.9
Interest Expense, Deferred Compensation Plan	$ 0.1	$ 0.1	$ 0.1
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)	1,388	1,481	2,264
Common Stock Including Additional Paid in Capital [Member]
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)	1,388	1,481
Stock Purchase Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	250,000			250,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	235,900			235,900
Other Liabilities [Member]
Deferred Compensation Liability, Current and Noncurrent, Total	$ 1.1	$ 1.2		$ 1.1

Note 15 - Derivatives and Hed_3

Note 15 - Derivatives and Hedging Activities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Noninterest Income, Total	$ 32,077,000	$ 56,220,000	$ 45,172,000
Noninterest Expense, Total	107,981,000	110,866,000	$ 98,520,000
Interest Rate Swap [Member]
Noninterest Income, Total	100,000
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral, Total	25,900,000	4,900,000
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	25,300,000	800,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	25,200,000	700,000
Derivative Asset, Subject to Master Netting Arrangement, before Offset	100,000	100,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset, Total	400,000	4,100,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	400,000	4,300,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction, Total	0	200,000
Derivative, Notional Amount	$ 401,572,000	279,419,000
Noninterest Expense, Total		$ 200,000

Note 15 - Derivatives and Hed_4

Note 15 - Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Details) - Interest Rate Swap [Member] - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Notional Amount	$ 401,572,000	$ 279,419,000
Other Assets [Member]
Derivative Assets Interest rate swaps	25,697,000	4,609,000
Other Liabilities [Member]
Derivative Liabilities Interest rate swaps	$ 25,900,000	$ 4,857,000

Note 16 - Fair Values of Fina_3

Note 16 - Fair Values of Financial Instruments - Fair Value Hierarchy of Financial Instruments (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Securities available for sale		$ 602,936,000	$ 592,743,000
Mortgages Held-for-sale, Fair Value Disclosure		3,600,000	16,700,000
Servicing Asset at Fair Value, Amount, Ending Balance		17,700,000	15,400,000
Fair Value, Inputs, Level 1 [Member]
Securities available for sale		0	0
Reported Value Measurement [Member]
Securities available for sale	[1]	602,936,000	592,743,000
Federal Home Loan Bank stock	[2]	17,721,000	18,002,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents		96,772,000	975,160,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans, net		3,874,373,000	3,418,096,000
Servicing Asset at Fair Value, Amount, Ending Balance		11,837,000	12,248,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Mortgages Held-for-sale, Fair Value Disclosure		3,565,000	16,117,000
Accrued interest receivable		15,476,000	9,311,000
Deposits		3,712,811,000	4,083,193,000
Securities sold under agreements to repurchase		194,340,000	197,463,000
Federal Home Loan Bank advances		308,263,000	374,000,000
Accrued interest payable		3,223,000	1,393,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Subordinated Debentures [Member]
Subordinated debt		48,958,000	48,244,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Subordinated Notes [Member]
Subordinated debt		88,628,000	73,646,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivative Asset, Total		25,697,000	4,609,000
Interest rate swaps		25,900,000	4,857,000
Estimate of Fair Value Measurement [Member]
Securities available for sale	[1]	602,936,000	592,743,000
Federal Home Loan Bank stock	[2]	17,721,000	18,002,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents		96,772,000	975,160,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans, net		3,800,042,000	3,498,345,000
Servicing Asset at Fair Value, Amount, Ending Balance		17,727,000	15,445,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Mortgages Held-for-sale, Fair Value Disclosure		3,643,000	16,707,000
Accrued interest receivable		15,476,000	9,311,000
Deposits		3,379,403,000	4,028,249,000
Securities sold under agreements to repurchase		194,340,000	197,463,000
Federal Home Loan Bank advances		292,044,000	384,927,000
Accrued interest payable		3,223,000	1,393,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Subordinated Debentures [Member]
Subordinated debt		49,531,000	48,284,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Subordinated Notes [Member]
Subordinated debt		75,024,000	73,646,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivative Asset, Total		25,697,000	4,609,000
Interest rate swaps		$ 25,900,000	$ 4,857,000
[1]See Note 17 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.[2]It is not practical to determine the fair value of FHLBI stock due to transferability restrictions; therefore, fair value is estimated at carrying amount.

Note 17 - Fair Value Measurem_3

Note 17 - Fair Value Measurements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale, Total	$ 602,936,000	$ 592,743,000
Mortgages Held-for-sale, Fair Value Disclosure	$ 3,600,000	16,700,000
Real Estate Dependent Loans and Foreclosed Assets Estimated Selling Costs [Member]
Fair Value Inputs, Discount Factor	10%
Maximum [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Discount Factor	35%
Maximum [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value Inputs, Discount Factor	50%
Minimum [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Discount Factor	25%
Minimum [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value Inputs, Discount Factor	25%
Weighted Average [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Discount Factor	25.20%
Weighted Average [Member] | Real Estate Dependent Loans and Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value Inputs, Discount Factor	32.90%
Municipal General Obligation Bonds [Member]
Debt Securities, Available-for-Sale, Total	$ 154,433,000	137,594,000
Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Inputs, Level 3 [Member] | Municipal General Obligation Bonds [Member] | Maximum [Member]
Debt Securities, Available-for-Sale, Decrease Due to Scheduled Maturities	100,000	100,000
Available-for-Sale Securities [Member]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance	$ 0	$ 0

Note 17 - Fair Value Measurem_4

Note 17 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale, Total	$ 602,936,000	$ 592,743,000
Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-Sale, Total	388,744,000	390,371,000
Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Total	31,953,000	41,803,000
Municipal General Obligation Bonds [Member]
Debt Securities, Available-for-Sale, Total	154,433,000	137,594,000
Municipal Revenue Bonds [Member]
Debt Securities, Available-for-Sale, Total	27,306,000	22,475,000
Other Debt and Equity Securities [Member]
Debt Securities, Available-for-Sale, Total	500,000	500,000
Fair Value, Recurring [Member]
Total assets	628,633,000	597,352,000
Total liabilities	25,900,000	4,857,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total assets	0	0
Total liabilities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total assets	628,055,000	596,675,000
Total liabilities	25,900,000	4,857,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total assets	578,000	677,000
Total liabilities	0	0
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Derivative Asset, Total	25,697,000	4,609,000
Interest rate swaps	25,900,000	4,857,000
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset, Total	0	0
Interest rate swaps	0	0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset, Total	25,697,000	4,609,000
Interest rate swaps	25,900,000	4,857,000
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative Asset, Total	0	0
Interest rate swaps	0	0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-Sale, Total	388,744,000	390,371,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-Sale, Total	388,744,000	390,371,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Total	31,953,000	41,803,000
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-Sale, Total	31,953,000	41,803,000
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member]
Debt Securities, Available-for-Sale, Total	154,433,000	137,594,000
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-Sale, Total	153,855,000	136,917,000
Fair Value, Recurring [Member] | Municipal General Obligation Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	578,000	677,000
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member]
Debt Securities, Available-for-Sale, Total	27,306,000	22,475,000
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-Sale, Total	27,306,000	22,475,000
Fair Value, Recurring [Member] | Municipal Revenue Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member]
Debt Securities, Available-for-Sale, Total	500,000	500,000
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-Sale, Total	0	0
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-Sale, Total	500,000	500,000
Fair Value, Recurring [Member] | Other Debt and Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-Sale, Total	$ 0	$ 0

Note 17 - Fair Value Measurem_5

Note 17 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Collateral dependent loans	$ 5,290,000
Foreclosed assets	0	$ 0
Total	5,290,000	3,807,000
Impaired loans		3,807,000
Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans	0
Foreclosed assets	0	0
Total	0	0
Impaired loans		0
Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans	0
Foreclosed assets	0	0
Total	0	0
Impaired loans		0
Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans	5,290,000
Foreclosed assets	0	0
Total	$ 5,290,000	3,807,000
Impaired loans		$ 3,807,000

Note 18 - Earnings Per Share (D

Note 18 - Earnings Per Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	5,000	7,000	9,000

Note 18 - Earnings Per Share -

Note 18 - Earnings Per Share - Computation of Earnings Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income attributable to common shares	$ 61,063,000	$ 59,021,000	$ 44,138,000
Weighted average common shares outstanding (in shares)	15,859,889	15,986,857	16,268,689
Basic earnings per common share (in dollars per share)	$ 3.85	$ 3.69	$ 2.71
Net income	$ 61,063,000	$ 59,021,000	$ 44,138,000
Weighted average common shares outstanding for basic earnings per common share (in shares)	15,859,889	15,986,857	16,268,689
Add: Dilutive effects of share-based awards (in shares)	12	446	630
Average shares and dilutive potential common shares (in shares)	15,859,901	15,987,303	16,269,319
Diluted earnings per common share (in dollars per share)	$ 3.85	$ 3.69	$ 2.71

Note 19 - Variable Interest E_3

Note 19 - Variable Interest Entities (Details Textual)			12 Months Ended
	Jan. 26, 2016 USD ($)	Jun. 01, 2014 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Business Trusts			5
Business Combination Debt Assumed Number of Trusts			4
Fair Value Discount of Subordinated Debentures Related to Assumed Business Trusts at Time af Merger		$ 15,000,000
Amortization of Fair Value Discount Related to Subordinated Debentures of Assumed Business Trusts		$ 700,000
Amortization Period of Fair Value Discount Related to Subordinated Debentures of Assumed Business Trusts (Year)		21 years 6 months
Preferred Securities of Subsidiary Trust			$ 46,900,000	$ 46,200,000
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total			48,958,000	$ 48,244,000
Mercantile Bank Capital Trust I [Member]
Preferred Securities of Subsidiary Trust	$ 32,000,000		$ 21,000,000
Payments for Repurchase of Trust Preferred Securities	11,000,000
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total	21,000,000
Fund [Member] | Mercantile Bank Capital Trust I [Member]
Preferred Securities of Subsidiary Trust	$ 11,000,000
Five Business Trusts [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage			100%

Note 19 - Variable Interest E_4

Note 19 - Variable Interest Entities - Business Trusts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jan. 26, 2016
Preferred securities outstanding	$ 46,900,000	$ 46,200,000
Mercantile Bank Capital Trust I [Member]
Preferred securities outstanding	$ 21,000,000		$ 32,000,000
Mercantile Bank Capital Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate margin	2.18%
Firstbank Capital Trust I [Member]
Preferred securities outstanding	$ 10,000,000
Firstbank Capital Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate margin	1.99%
Firstbank Capital Trust II [Member]
Preferred securities outstanding	$ 10,000,000
Firstbank Capital Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate margin	1.27%
Firstbank Capital Trust III [Member]
Preferred securities outstanding	$ 7,500,000
Firstbank Capital Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate margin	1.35%
Firstbank Capital Trust IV [Member]
Preferred securities outstanding	$ 7,500,000
Firstbank Capital Trust IV [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rate margin	1.35%

Note 19 - Variable Interest E_5

Note 19 - Variable Interest Entities - Unconsolidated Variable Interest Entities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Aggregate Assets	$ 4,872,619,000	$ 5,257,749,000
Aggregate Liabilities	4,431,211,000	$ 4,801,190,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Aggregate Assets	58,100,000
Aggregate Liabilities	56,000,000
Risk of Loss	$ 2,100,000

Note 20 - Subordinated Notes (D

Note 20 - Subordinated Notes (Details Textual) - Subordinated Notes [Member] - USD ($) $ in Millions	Jan. 14, 2022	Dec. 15, 2021
Subordinated Debt, Principal Amount	$ 15	$ 75
Subordinated Borrowing, Interest Rate		3.25%
Subordinated Borrowing, Redemption Price, Percentage of Principal Amount		100%
Increase to Equity Capital From Issuance of Subordinated Long-term Debt	$ 15	$ 70
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		2.12%

Note 21 - Regulatory Matters (D

Note 21 - Regulatory Matters (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions									12 Months Ended
	Dec. 14, 2022	Oct. 13, 2022	Sep. 14, 2022	Jul. 14, 2022	Jun. 15, 2022	Apr. 14, 2022	Mar. 16, 2022	Jan. 13, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2021	Dec. 31, 2009
Capital Conservation Buffer									2.50%
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy to Risk Weighted Assets									0.070
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets									0.085
Capital Required for Capital Adequacy to Risk Weighted Assets									0.105
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval									$ 140
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.32		$ 0.32		$ 0.31		$ 0.31
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.32		$ 0.32		$ 0.31		$ 0.31		$ 1.26	$ 1.18	$ 1.12
Stock Repurchase Program, Remaining Authorized Repurchase Amount									$ 6.8
Stock Repurchase Program, Authorized Amount												$ 20
Stock Repurchased During Period, Shares (in shares)									0
Preferred Securities of Subsidiary Trust									$ 46.9	$ 46.2
Maximum Restricted Core Element Allowed in Tier One Capital Percent									25%
Maximum Level of Consolidated Aggregate Assets Allowing for Inclusion of Trust Preferred Securities in Tier One Capital													$ 15,000
Trust Preferred Securities Included in Tier One Capital									$ 46.9	$ 46.2

Note 21 - Regulatory Matters -

Note 21 - Regulatory Matters - Actual Capital Levels and Minimum Levels (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Total capital minimum required for capital adequacy, ratio	0.105
Tier 1 capital minimum required for capital adequacy, ratio	0.085
Common equity tier 1 capital minimum required for capital adequacy, ratio	0.070
Consolidated Entities [Member]
Total capital, amount	$ 634,729	$ 565,143
Total capital, ratio	0.140	0.140
Total capital minimum required for capital adequacy, amount	$ 362,675	$ 324,101
Total capital minimum required for capital adequacy, ratio	0.080	0.080
Tier 1 capital, amount	$ 503,855	$ 456,133
Tier 1 capital, ratio	0.111	0.113
Tier 1 capital minimum required for capital adequacy, amount	$ 272,007	$ 243,076
Tier 1 capital minimum required for capital adequacy, ratio	0.060	0.060
Common equity tier 1, amount	$ 456,970	$ 409,963
Common equity tier 1, ratio	0.101	0.101
Common equity tier 1 minimum required for capital adequacy, amount	$ 204,005	$ 182,307
Common equity tier 1 capital minimum required for capital adequacy, ratio	0.045	0.045
Tier 1 capital to average assets, amount	$ 503,855	$ 456,133
Tier 1 capital to average assets, ratio	0.101	0.092
Tier 1 capital to average assets, minimum required for capital adequacy, amount	$ 199,647	$ 198,574
Tier 1 capital to average assets minimum required for capital adequacy, ratio	0.040	0.040
Bank [Member]
Total capital, amount	$ 618,709	$ 551,760
Total capital, ratio	0.137	0.136
Total capital minimum required for capital adequacy, amount	$ 362,490	$ 323,928
Total capital minimum required for capital adequacy, ratio	0.080	0.080
Total capital to be well capitalized, amount	$ 453,112	$ 404,910
Total capital to be well capitalized, ratio	0.100	0.100
Tier 1 capital, amount	$ 576,463	$ 516,397
Tier 1 capital, ratio	0.127	0.128
Tier 1 capital minimum required for capital adequacy, amount	$ 271,868	$ 242,946
Tier 1 capital minimum required for capital adequacy, ratio	0.060	0.060
Tier 1 capital to be well capitalized, amount	$ 362,490	$ 323,928
Tier 1 capital to be well capitalized, ratio	0.080	0.080
Common equity tier 1, amount	$ 576,463	$ 516,397
Common equity tier 1, ratio	0.127	0.128
Common equity tier 1 minimum required for capital adequacy, amount	$ 203,901	$ 182,210
Common equity tier 1 capital minimum required for capital adequacy, ratio	0.045	0.045
Common equity tier 1 capital to be well capitalized, amount	$ 294,523	$ 263,192
Common equity tier 1 capital to be well capitalized, ratio	0.065	0.065
Tier 1 capital to average assets, amount	$ 576,463	$ 516,397
Tier 1 capital to average assets, ratio	0.116	0.104
Tier 1 capital to average assets, minimum required for capital adequacy, amount	$ 199,563	$ 198,510
Tier 1 capital to average assets minimum required for capital adequacy, ratio	0.040	0.040
Tier 1 capital to average assets to be well capitalized, amount	$ 249,453	$ 248,137
Tier 1 capital to average assets to be well capitalized, ratio	0.050	0.050

Note 22 - Mercantile Bank Cor_3

Note 22 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Other assets	$ 94,993,000	$ 54,267,000
Total assets	4,872,619,000	5,257,749,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities	4,431,211,000	4,801,190,000
Subordinated debentures	48,958,000	48,244,000
Subordinated notes	88,628,000	73,646,000
Shareholders’ equity	441,408,000	456,559,000	$ 441,554,000	$ 416,561,000
Total liabilities and shareholders’ equity	4,872,619,000	5,257,749,000
Parent Company [Member]
ASSETS
Cash and cash equivalents	18,633,000	14,570,000
Investment in bank subsidiary	543,599,000	545,691,000
Other assets	19,786,000	19,576,000
Total assets	582,018,000	579,837,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities	3,024,000	1,388,000
Subordinated debentures	48,958,000	48,244,000
Subordinated notes	88,628,000	73,646,000
Shareholders’ equity	441,408,000	456,559,000
Total liabilities and shareholders’ equity	$ 582,018,000	$ 579,837,000

Note 22 - Mercantile Bank Cor_4

Note 22 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements - Condensed Statements of Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income
Interest and dividends from subsidiaries	$ 181,839,000	$ 143,494,000	$ 148,313,000
Expenses
Interest expense	23,595,000	19,432,000	26,067,000
Federal income tax benefit	14,727,000	14,695,000	10,710,000
Net income	61,063,000	59,021,000	44,138,000
Comprehensive income (loss)	(549,000)	49,806,000	45,929,000
Parent Company [Member]
Income
Interest and dividends from subsidiaries	26,056,000	39,058,000	32,588,000
Total income	26,056,000	39,058,000	32,588,000
Expenses
Interest expense	6,104,000	1,934,000	2,268,000
Other operating expenses	5,645,000	5,831,000	4,441,000
Total expenses	11,749,000	7,765,000	6,709,000
Income before income tax benefit and equity in undistributed net income of subsidiary	14,307,000	31,293,000	25,879,000
Federal income tax benefit	(2,535,000)	(1,653,000)	(1,173,000)
Equity in undistributed net income of subsidiary	44,221,000	26,075,000	17,086,000
Net income	61,063,000	59,021,000	44,138,000
Comprehensive income (loss)	$ (549,000)	$ 49,806,000	$ 45,929,000

Note 22 - Mercantile Bank Cor_5

Note 22 - Mercantile Bank Corporation (Parent Company Only) Condensed Financial Statements - Condensed Statement of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income	$ 61,063,000	$ 59,021,000	$ 44,138,000
Adjustments to reconcile net income to net cash from operating activities:
Stock-based compensation expense	3,377,000	3,784,000	2,325,000
Stock grants to directors for retainer fee	359,000	344,000	394,000
Other assets	(437,000)	(12,655,000)	(9,907,000)
Accrued interest and other liabilities	32,524,000	(3,513,000)	886,000
Cash flows from investing activities
Net cash for investing activities	(554,999,000)	(495,507,000)	(398,806,000)
Cash flows from financing activities
Proceeds from stock option exercises, net of cashless exercises	36,000	50,000	3,000
Employee stock purchase plan	45,000	48,000	49,000
Dividend reinvestment plan	867,000	877,000	814,000
Net proceeds from subordinated notes issuance	14,645,000	73,635,000	0
Repurchases of common stock	0	(21,380,000)	(6,591,000)
Payment of cash dividends to common shareholders	(19,602,000)	(18,524,000)	(17,930,000)
Net cash (for) from financing activities	(443,251,000)	780,088,000	753,204,000
Net change in cash and cash equivalents	(878,388,000)	349,154,000	392,275,000
Parent Company [Member]
Cash flows from operating activities
Net income	61,063,000	59,021,000	44,138,000
Adjustments to reconcile net income to net cash from operating activities:
Equity in undistributed net income of subsidiary	(44,221,000)	(26,075,000)	(17,086,000)
Stock-based compensation expense	3,377,000	3,784,000	2,325,000
Stock grants to directors for retainer fee	359,000	344,000	394,000
Other assets	858,000	49,000	(227,000)
Accrued interest and other liabilities	1,636,000	(5,000)	812,000
Net cash from operating activities	23,072,000	37,118,000	30,356,000
Cash flows from investing activities
Net capital investment into subsidiaries	(15,000,000)	(70,000,000)	0
Net cash for investing activities	(15,000,000)	(70,000,000)	0
Cash flows from financing activities
Proceeds from stock option exercises, net of cashless exercises	36,000	50,000	3,000
Employee stock purchase plan	45,000	48,000	49,000
Dividend reinvestment plan	867,000	877,000	814,000
Net proceeds from subordinated notes issuance	14,645,000	73,635,000	0
Repurchases of common stock	0	(21,380,000)	(6,591,000)
Payment of cash dividends to common shareholders	(19,602,000)	(18,524,000)	(17,930,000)
Net cash (for) from financing activities	(4,009,000)	34,706,000	(23,655,000)
Net change in cash and cash equivalents	4,063,000	1,824,000	6,701,000
Cash and cash equivalents at beginning of period	14,570,000	12,746,000	6,045,000
Cash and cash equivalents at end of period	$ 18,633,000	$ 14,570,000	$ 12,746,000

Note 23 - Subsequent Events (De

Note 23 - Subsequent Events (Details Textual) - $ / shares

12 Months Ended

Mar. 15, 2023

Jan. 12, 2023

Dec. 14, 2022

Oct. 13, 2022

Sep. 14, 2022

Jul. 14, 2022

Jun. 15, 2022

Apr. 14, 2022

Mar. 16, 2022

Jan. 13, 2022

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Common Stock, Dividends, Per Share, Declared (in dollars per share)

$ 0.32

$ 0.32

$ 0.31

$ 0.31

Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)

$ 0.32

$ 0.32

$ 0.31

$ 0.31

$ 1.26

$ 1.18

$ 1.12

Forecast [Member]

Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)

$ 0.33

Subsequent Event [Member]

Common Stock, Dividends, Per Share, Declared (in dollars per share)

$ 0.33