Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements And Fair Value Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2024
Not Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Assets	$ 3,343	$ 5,520
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Derivative Liabilities	$ 3,343	$ 5,520
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Notional amount	$ 118,602	$ 104,897
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional amount			$ 125,000
Designated as Hedging Instrument | Fair Value Swap
Derivative [Line Items]
Derivative Assets	$ 0	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Derivative Liabilities	$ 0	$ 2,263
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities
Notional amount	$ 0	$ 300,000