Derivative Instruments - Hedged assets and liabilities in fair value (Details) - Designated as hedging instruments - Fair value hedging $ in Thousands	Mar. 31, 2023 USD ($)
Derivative Instruments
Carrying Amount of Hedged Assets / Liabilities	$ 297,038
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of Hedged Assets / Liabilities	1,723
Mortgage backed securities - Residential agency
Derivative Instruments
Carrying Amount of Hedged Assets / Liabilities	297,038
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of Hedged Assets / Liabilities	$ 1,723