Note 5 - Goodwill - Carrying Value of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Mar. 07, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Goodwill		$ 194,074	$ 202,524	$ 194,074
Balance at beginning of period		194,074	135,830	135,830
Goodwill recorded from acquisitions		0	66,694
Provisional period adjustments		0	0
Disposition of LFA		0	0
Impairment		0	0
Balance at end of period		194,074	$ 202,524	194,074
Commonwealth [Member]
Goodwill	$ 67,000	58,244		58,244
Balance at beginning of period		58,244
Goodwill recorded from acquisitions	66,694
Balance at end of period	$ 67,000	58,244		58,244
Kentucky Bancshares [Member]
Goodwill		123,317		123,317
Balance at beginning of period		123,317
Balance at end of period		123,317		123,317
King Southern Bancorp [Member]
Goodwill		11,831		11,831
Balance at beginning of period		11,831
Balance at end of period		11,831		11,831
Austin State Bank [Member]
Goodwill		682		682
Balance at beginning of period		682
Balance at end of period		$ 682		$ 682