CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.32	$ 0.30	$ 0.96	$ 0.89
Treasury stock issued for restricted stock awards (in shares)	3,795		35,836	4,250
Forfeitures of restricted stock awards (in shares)	1,404	18,943	51,834	74,168
Repurchase of S&T Stock (in shares)	0	117,283	739,426	268,503