Note 27 - Stock Yards Bancorp, Inc. (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income before income taxes and equity in undistributed net income of subsidiary	$ 39,084	$ 37,564	$ 34,449	$ 9,387	$ 32,114	$ 30,064	$ 5,048	$ 28,171	$ 20,421	$ 16,124	$ 15,716	$ 15,482
Income tax benefit	9,174	9,024	7,547	1,445	7,525	6,902	864	5,461	2,685	1,591	2,348	2,250	$ 27,190	$ 20,752	$ 8,874
Net income	29,910	28,540	26,902	7,942									93,294	74,645	58,869
Less income attributed to non-controlling interest	93	85	108	36									322	0	0
Net income available to stockholders	$ 29,817	$ 28,455	$ 26,794	$ 7,906	$ 24,589	$ 23,162	$ 4,184	$ 22,710	$ 17,736	$ 14,533	$ 13,368	$ 13,232	92,972	74,645	58,869
Comprehensive income (loss)													(14,624)	57,964	66,933
Parent Company [Member]
Income - dividends and interest from subsidiaries													45,076	62,941	18,050
Other income													1	1	1
Less expenses													8,415	7,534	3,909
Income before income taxes and equity in undistributed net income of subsidiary													36,662	55,408	14,142
Income tax benefit													(3,780)	(2,957)	(1,749)
Income before equity in undistributed net income of subsidiary													40,442	58,365	15,891
Equity in undistributed net income of subsidiary													52,852	16,280	42,978
Net income													93,294	74,645	58,869
Less income attributed to non-controlling interest													322	0	0
Net income available to stockholders													92,972	74,645	58,869
Comprehensive income (loss)													$ (14,624)	$ 57,964	$ 66,933