Note 2 - Acquisition - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($)						3 Months Ended		12 Months Ended
		Mar. 07, 2022		May 31, 2021		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Jun. 01, 2021	Dec. 31, 2020
Goodwill, Ending Balance						$ 202,524,000	$ 12,513,000	$ 135,830,000		$ 12,513,000
Consideration paid in acquisition						30,994,000	0
Total consideration paid						167,913,000	0
Goodwill						66,694,000	$ 0
Commonwealth [Member]
Mortgage loans held for sale		$ 3,559,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	[1]	246,793,000
Federal Home Loan Bank stock, at cost		4,436,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross		632,404,000
Allowance for credits losses on loans		(9,950,000)							$ (9,950,000)
Net loans		622,454,000
Premises and equipment, net		32,793,000
Accrued interest receivable		1,973,000
Goodwill, Ending Balance		67,000,000				66,694,000		0
Mortgage servicing rights		12,676,000
Deferred income taxes, net		(3,727,000)
Other assets		8,324,000
Total assets acquired		1,336,815,000
Non-interest bearing		302,098,000
Interest bearing		818,705,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		1,120,803,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement		66,220,000
Subordinated debentures		26,012,000
Line of credit		3,200,000
Accrued interest payable		243,000
Other liabilities		19,118,000
Total liabilities assumed		1,235,596,000
Net assets acquired		101,219,000
Consideration for common stock		133,825,000
Consideration paid in acquisition		30,994,000
Noncontrolling interest of acquired entity		3,094,000
Total consideration paid		167,913,000
Goodwill		66,694,000
Deferred income taxes, net		3,727,000
Commonwealth [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		12,724,000
Commonwealth [Member] | Customer Lists [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		14,360,000
Commonwealth [Member] | Cash [Member]
Cash and due from banks		380,450,000
Commonwealth [Member] | As Recorded By Acquiree [Member]
Mortgage loans held for sale		3,559,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	[1]	247,209,000
Federal Home Loan Bank stock, at cost		4,436,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross		645,551,000
Allowance for credits losses on loans		(16,102,000)							(16,102)
Net loans		629,449,000
Premises and equipment, net		28,784,000
Accrued interest receivable		1,973,000
Goodwill, Ending Balance		5,412,000
Mortgage servicing rights		9,387,000
Deferred income taxes, net		0
Other assets		9,389,000
Total assets acquired		1,320,048,000
Non-interest bearing		302,098,000
Interest bearing		818,334,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		1,120,432,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement		66,220,000
Subordinated debentures		26,806,000
Line of credit		3,200,000
Accrued interest payable		243,000
Other liabilities		17,822,000
Total liabilities assumed		1,234,723,000
Net assets acquired		85,325,000
Deferred income taxes, net		(0)
Commonwealth [Member] | As Recorded By Acquiree [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0
Commonwealth [Member] | As Recorded By Acquiree [Member] | Customer Lists [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0
Commonwealth [Member] | As Recorded By Acquiree [Member] | Cash [Member]
Cash and due from banks		380,450,000
Commonwealth [Member] | As Adjusted By Acquirer [Member]
Mortgage loans held for sale	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	[1],[2],[3]	(416,000)
Federal Home Loan Bank stock, at cost	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross	[2],[4]	(13,147,000)
Allowance for credits losses on loans		6,152,000	[2],[5]						(6,152,000)
Net loans	[2]	(6,995,000)
Premises and equipment, net	[2],[6]	4,009,000
Accrued interest receivable	[2]	0
Goodwill, Ending Balance	[2],[7]	(5,412,000)
Mortgage servicing rights	[2],[8]	3,289,000
Deferred income taxes, net	[2],[9]	(3,727,000)
Other assets	[2],[10]	(1,065,000)
Total assets acquired	[2]	16,767,000
Non-interest bearing	[2]	0
Interest bearing	[2],[11]	371,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	[2]	371,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement	[2]	0
Subordinated debentures	[2],[12]	(794,000)
Line of credit	[2]	0
Accrued interest payable	[2]	0
Other liabilities	[2],[13]	1,296,000
Total liabilities assumed	[2]	873,000
Net assets acquired	[2]	15,894,000
Deferred income taxes, net	[2],[9]	3,727,000
Commonwealth [Member] | As Adjusted By Acquirer [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2],[14]	12,724,000
Commonwealth [Member] | As Adjusted By Acquirer [Member] | Customer Lists [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2],[15]	14,360,000
Commonwealth [Member] | As Adjusted By Acquirer [Member] | Cash [Member]
Cash and due from banks	[2]	$ 0
Kentucky Bancshares [Member]
Mortgage loans held for sale				$ 3,071,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities				395,862,000
Federal Home Loan Bank stock, at cost				7,072,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross				755,175,000
Allowance for credits losses on loans				(6,757)					(6,757,000)
Net loans				748,418,000
Premises and equipment, net				21,040,000
Accrued interest receivable				4,939,000
Goodwill, Ending Balance						$ 123,317,000		123,317,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				4,403,000
Mortgage servicing rights				1,662,000
Deferred income taxes, net				(2,341,000)
Other assets				4,485,000
Total assets acquired				1,266,010,000
Non-interest bearing				359,544,000
Interest bearing				679,674,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits				1,039,218,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement				11,360,000
Accrued interest payable				505,000
Other liabilities				14,227,000
Total liabilities assumed				1,156,381,000
Net assets acquired				109,629,000
Consideration for common stock				204,670,000
Consideration paid in acquisition				28,276,000
Total consideration paid				232,946,000
Goodwill				123,317,000
Bank owned life insurance				18,909,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	[16],[17]			999,000
Other real estate owned				551,000
Deferred income taxes, net				2,341,000
Deferred income taxes, net	[17],[18]			(230,000)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid and Other Assets				(70,000)	[17],[19]			(70,000)
Total assets acquired, adjustment	[17]			699,000
Federal Home Loan Bank advances				91,071,000
Kentucky Bancshares [Member] | Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				4,400,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles								$ 999,000
Kentucky Bancshares [Member] | Cash [Member]
Cash and due from banks				53,257,000
Kentucky Bancshares [Member] | As Recorded By Acquiree [Member]
Mortgage loans held for sale				3,071,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities				396,157,000
Federal Home Loan Bank stock, at cost				7,072,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross				755,932,000
Allowance for credits losses on loans				(9,491)					(9,491,000)
Net loans				746,441,000
Premises and equipment, net				27,401,000
Accrued interest receivable				4,939,000
Goodwill, Ending Balance				14,001,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Mortgage servicing rights				1,628,000
Deferred income taxes, net				(1,856,000)
Other assets				6,421,000
Total assets acquired				1,281,827,000
Non-interest bearing				359,544,000
Interest bearing				678,528,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits				1,038,072,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement				11,360,000
Accrued interest payable				505,000
Other liabilities				16,231,000
Total liabilities assumed				1,154,749,000
Net assets acquired				127,078,000
Bank owned life insurance				18,909,000
Other real estate owned				674,000
Deferred income taxes, net				1,856,000
Federal Home Loan Bank advances				88,581,000
Kentucky Bancshares [Member] | As Recorded By Acquiree [Member] | Cash [Member]
Cash and due from banks				53,257,000
Kentucky Bancshares [Member] | As Adjusted By Acquirer [Member]
Mortgage loans held for sale	[17]			0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities	[17],[20]			(295,000)
Federal Home Loan Bank stock, at cost	[17]			0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross				(757,000)	[17],[21]				(757,000)
Allowance for credits losses on loans				2,734	[17],[22]				$ (2,734,000)
Net loans	[17]			1,977,000
Premises and equipment, net	[6],[17]			(6,361,000)
Accrued interest receivable	[17]			0
Goodwill, Ending Balance	[17],[23]			(14,001,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[16],[17]			3,404,000
Mortgage servicing rights	[17],[24]			34,000
Deferred income taxes, net	[17],[18]			(715,000)
Other assets	[17],[19]			(1,866,000)
Total assets acquired	[17]			(16,516,000)
Non-interest bearing	[17]			0
Interest bearing	[11],[17]			1,146,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	[17]			1,146,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Sold under Repurchase Agreement	[17]			0
Accrued interest payable	[17]			0
Other liabilities	[17],[25]			(2,004,000)
Total liabilities assumed	[17]			1,632,000
Net assets acquired	[17]			(18,148,000)
Bank owned life insurance	[17]			0
Other real estate owned	[17],[26]			(123,000)
Deferred income taxes, net	[17],[18]			715,000
Federal Home Loan Bank advances	[17],[27]			2,490,000
Kentucky Bancshares [Member] | As Adjusted By Acquirer [Member] | Cash [Member]
Cash and due from banks	[17]			$ 0

[1] As of acquisition date, securities with a fair value of $162 million were classified as HTM.

[2] See the following page for explanations or individual fair value and provisional period adjustments.

[3] Adjustment based on Bancorp’s evaluation of the acquired investment portfolio.

[4] Adjustments to loans to reflect estimated fair value adjustments, including the following: (in thousands) Fair value adjustment - acquired non PCD loans $ (9,216 ) Fair value adjustment - acquired PCD loans (4,094 ) Eliminate unrecognized loan fees on acquired loans and fair value hedge 163 Net loan fair value adjustments $ (13,147 )

[5] The net adjustment to allowance for credit losses includes the following: (in thousands) Reversal of historical CB allowance for credit losses on loans $ (16,102 ) Estimate of lifetime credit losses for PCD loans 9,950 Net change in allowance for credit losses $ (6,152 )

[6] Adjustment to premises and equipment to reflect the estimated fair value of acquired premises and equipment and right of use assets.

[7] Elimination of the historical CB goodwill.

[8] Adjustment to reflect the estimated fair value of MSRs.

[9] Adjustment to net DTAs associated with the effects of the purchase accounting adjustments.

[10] Adjustment to other assets to reflect the estimated fair value of prepaid and other assets.

[11] Adjustment to deposits to reflect the estimated fair value of time deposits in interest rates, which was based primarily on an analysis of current market interest rates and maturity dates.

[12] Adjustment to reflect the estimated fair value of subordinated debentures for differences in interest rates, which was based primarily on an analysis of current market interest rates and maturity dates.

[13] Adjustment to other liabilities to establish the reserve for unfunded loan commitments under CECL, operating lease liabilities and various accrual adjustments.

[14] Calculation of CDI related to the acquisition.

[15] Calculation of Customer Lists Intangibles related to the acquisition.

[16] Calculation of core deposit intangible related to the acquisition. During the third quarter of 2021, a recast adjustment of $999,000 was recorded based on revised inputs used in the calculation of the CDI attributed to KB, resulting in an increased intangible value.

[17] See the following page for explanations or individual fair value and recast adjustments.

[18] Adjustment to net deferred tax assets associated with the effects of the purchase accounting adjustments.

[19] Adjustment to other assets to reflect the estimated fair value of prepaid and other assets. During the third quarter of 2021, a recast adjustment of $70,000 was recorded for the write off of miscellaneous mortgage servicing fees accrued in other assets by KB at acquisition, resulting in a reduction to other assets.

[20] Adjustment based on Bancorp’s evaluation of the acquired investment portfolio. Bancorp sold approximately $91 million in AFS debt securities shortly after acquisition.

[21] Adjustments to loans to reflect estimated fair value adjustments, including the following: (in thousands) Fair value adjustment - acquired non PCD loans $ 228 Fair value adjustment - acquired PCD loans (735 ) Eliminate unrecognized loan fees on acquired loans and fair value hedge (250 ) Net loan fair value adjustments $ (757 )

[22] The net adjustment to allowance for credit losses includes the following: (in thousands) Reversal of historical KB allowance for credit losses on loans $ 9,491 Estimate of lifetime credit losses for PCD loans (6,757 ) Net change in allowance for credit losses $ 2,734

[23] Elimination of the historical KB goodwill of $14.0 million at the closing date.

[24] Adjustment to reflect the estimated fair value of mortgage servicing rights.

[25] Adjustment to other liabilities to establish the reserve for unfunded loan commitments under CECL and various accrual adjustments.

[26] Adjustment to reflect the estimated fair value of other real estate owned.

[27] Adjustment to reflect the estimated fair value of Federal Home Loan Bank advances for differences in interest rates, which was based primarily on an analysis of current market interest rates and maturity dates. All KB FHLB advances were paid off immediately upon acquisition.