Note 5 - Goodwill - Carrying Value of Goodwill (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 07, 2022	May 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Goodwill			$ 202,524	$ 136,529	$ 202,524	$ 136,529	$ 135,830
Balance at beginning of period			202,524	12,513	135,830	12,513	12,513
Goodwill recorded due to acquisition			0	124,016	66,694	124,016
Provisional period adjustments			0	0	0	0
Impairment			0	0	0	0	0
Balance at end of period			202,524	$ 136,529	202,524	$ 136,529	135,830
Commonwealth [Member]
Goodwill	$ 67,000		66,694		66,694		0
Balance at beginning of period					0
Goodwill recorded due to acquisition	66,694
Balance at end of period	$ 67,000		66,694		66,694		0
Kentucky Bancshares [Member]
Goodwill			123,317		123,317		123,317
Balance at beginning of period					123,317
Goodwill recorded due to acquisition		$ 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