Note 4 - Goodwill - Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Mar. 07, 2022
Goodwill	$ 194,074	$ 202,524	$ 194,074	$ 202,524	$ 194,074
Balance at beginning of period	194,074	202,524	194,074	135,830	135,830
Goodwill recorded from acquisitions	0	0	0	66,694
Provisional period adjustments	0	0	0	0
Disposition of LFA	0	0	0	0
Impairment	0	0	0	0
Balance at end of period	194,074	$ 202,524	194,074	$ 202,524	194,074
Commonwealth [Member]
Goodwill	58,244		58,244		58,244	$ 67,000
Balance at beginning of period			58,244
Balance at end of period	58,244		58,244		58,244
Kentucky Bancshares [Member]
Goodwill	123,317		123,317		123,317
Balance at beginning of period			123,317
Balance at end of period	123,317		123,317		123,317
King Southern Bancorp [Member]
Goodwill	11,831		11,831		11,831
Balance at beginning of period			11,831
Balance at end of period	11,831		11,831		11,831
Austin State Bank [Member]
Goodwill	682		682		682
Balance at beginning of period			682
Balance at end of period	$ 682		$ 682		$ 682