Derivative Instruments and Hedging Activities - Gain or (loss) recognized on derivatives not designated as hedging relationships (Details) - Risk Participation Agreements - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Derivative Instruments and Hedging Activities
Gain or (loss) recognized on derivatives not designated as hedging relationships	$ (4)	$ 36	$ 1	$ 17
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other	Noninterest Income, Other	Noninterest Income, Other

Derivative Instruments and Hedging Activities - Gain or (loss) recognized on derivatives not designated as hedging relationships (Details) - Risk Participation Agreements - Derivatives not designated as hedging instruments - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2026

Sep. 30, 2025

Sep. 30, 2026

Sep. 30, 2025

Derivative Instruments and Hedging Activities

Gain or (loss) recognized on derivatives not designated as hedging relationships

$ (4)

$ 36

$ 1

$ 17

Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Noninterest Income, Other