Subsequent Event (Details) - USD ($)	2 Months Ended	12 Months Ended
	Feb. 25, 2026	Dec. 31, 2025	Dec. 31, 2024	Jan. 21, 2026	Dec. 31, 2023	Jan. 25, 2023
Subsequent Event [Line Items]
Stock repurchase program, authorized amount		$ 50,000,000	$ 50,000,000
Stock repurchase program, remaining authorized amount		$ 13,774,000	$ 50,000,000		$ 50,000,000
Average share price for the period (in dollars per share)		$ 38.20	$ 0
2025 Share Repurchase Program
Subsequent Event [Line Items]
Stock repurchase program, authorized amount						$ 50,000,000
Stock repurchase program, remaining authorized amount		$ 13,800,000
2025 Share Repurchase Program | Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, authorized amount				$ 100,000,000
New S&T Share Repurchase Program | Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, remaining authorized amount	$ 62,800,000
Stock repurchased during period (in shares)	856,900
Average share price for the period (in dollars per share)	$ 43.45
Share repurchase program excise tax and commissions	$ 37,200,000