Derivative Instruments - Credit Risk (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Other Liabilities	$ 59,456	$ 77,160
Obligation to repay	31,900	41,600
Interest Rate Swap Contracts
Derivative [Line Items]
Fair value of derivative contracts	51,200	67,100
Interest Rate Swap Contracts | Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Securities pledged	900	500
Other Liabilities	193	45
Interest Rate Swap Contracts | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Other Liabilities	51,029	67,042
Interest Rate Swap Contracts | Derivatives Not Designated as Hedging Instruments | Third party broker
Derivative [Line Items]
Other Liabilities	$ 1,602	$ 603