Financial Derivatives (Futures) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Fair Value	$ 82,220	$ 78,320
Financial derivatives–assets, at fair value-	143,996	132,518
Derivative Liability	$ 61,776	54,198
Futures
Derivative [Line Items]
Remaining Years to Maturity	2 months 4 days
Financial derivatives–assets, at fair value-	$ 245	2,772
Derivative Liability	7,990	96
Short | Futures
Derivative [Line Items]
Notional Amount	311,200	315,200
Fair Value	(7,745)	$ 2,676
Remaining Years to Maturity		2 months 23 days
Financial Derivatives - Liabilities | Short | U.S. Treasury futures
Derivative [Line Items]
Notional Amount	$ 313,100	$ 49,800
Remaining Years to Maturity	2 months 4 days	3 months
Derivative Liability	$ (7,990)	$ (31)
Financial Derivatives - Liabilities | Long | U.S. Treasury futures
Derivative [Line Items]
Notional Amount	$ 0	$ 1,900
Remaining Years to Maturity	0 years	2 months 19 days
Derivative Liability	$ 0	$ (65)
Financial Derivatives - Assets | Short | U.S. Treasury futures
Derivative [Line Items]
Notional Amount	$ 0	$ 267,300
Remaining Years to Maturity	0 years	2 months 19 days
Financial derivatives–assets, at fair value-	$ 0	$ 2,772
Financial Derivatives - Assets | Long | U.S. Treasury futures
Derivative [Line Items]
Notional Amount	$ (1,900)	$ 0
Remaining Years to Maturity	2 months 19 days	0 years
Financial derivatives–assets, at fair value-	$ 245	$ 0