Derivative Instruments - Credit Risk (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Other Liabilities	$ 74,465	$ 77,160
Obligation to repay	33,600	41,600
Interest Rate Swap Contracts
Derivative [Line Items]
Fair value of derivative contracts	65,200	67,100
Interest Rate Swap Contracts | Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Securities pledged	0	500
Other Liabilities	817	45
Interest Rate Swap Contracts | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Other Liabilities	64,366	67,042
Interest Rate Swap Contracts | Derivatives Not Designated as Hedging Instruments | Third party broker
Derivative [Line Items]
Other Liabilities	$ 532	$ 603