Financial Derivatives Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
U.S. Treasury securities sold short, at fair value	$ 498	$ 117,195
US Treasury Securities [Member]
Derivative [Line Items]
U.S. Treasury securities sold short, at fair value	500	117,200
Investment Sold, Not yet Purchased, Balance, Principal Amount	$ 500	$ 118,800