Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	May 07, 2026	Mar. 31, 2026	Mar. 31, 2025	May 05, 2026	Dec. 31, 2025	Dec. 31, 2024
Subsequent Event [Line Items]
Share price (in dollars per share)		$ 43.30	$ 0
Stock repurchase program, remaining authorized amount		$ 50,379	$ 50,000		$ 100,000	$ 50,000
New S&T Share Repurchase Program
Subsequent Event [Line Items]
Stock repurchase program, remaining authorized amount		$ 50,400
Subsequent Event | New S&T Share Repurchase Program
Subsequent Event [Line Items]
Stock repurchased during period (in shares)	354,200
Share price (in dollars per share)	$ 44.29
Stock repurchased during period, value	$ 15,700
Stock repurchase program, remaining authorized amount				$ 34,700