Financial Derivatives (Credit Default Swaps) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Oct. 03, 2022	Dec. 31, 2021
Derivative [Line Items]
Financial derivatives–assets, at fair value-		$ 132,518	$ 7,121	$ 18,894
Financial derivatives–liabilities, at fair value-		(54,198)		(12,298)
Fair Value		(78,320)		(6,596)
Credit default swaps on asset-backed indices
Derivative [Line Items]
Financial derivatives–assets, at fair value-		3,366		1,751
Financial derivatives–liabilities, at fair value-		(33)		(39)
Credit default swaps on asset-backed indices | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount		(58,004)		(13,947)
Financial derivatives–assets, at fair value-		3,362		1,744
Credit default swaps on asset-backed securities
Derivative [Line Items]
Financial derivatives–assets, at fair value-		76		303
Credit default swaps on asset-backed securities | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount		(220)		(910)
Financial derivatives–assets, at fair value-		76		303
Credit default swaps
Derivative [Line Items]
Notional Amount		(238,773)		(37,190)
Fair Value		(1,720)		(202)
Credit default swaps on corporate bond indices
Derivative [Line Items]
Financial derivatives–assets, at fair value-		83		156
Financial derivatives–liabilities, at fair value-		(1,513)		(1,870)
Credit default swaps on corporate bond indices | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount		(1,498)		0
Financial derivatives–assets, at fair value-		$ 43		0
Remaining Years to Maturity	0 days	11 months 19 days
Credit default swaps on corporate bonds
Derivative [Line Items]
Financial derivatives–liabilities, at fair value-		$ (259)		$ (99)
Credit default swaps on corporate bonds | Financial Derivatives - Assets | Short
Derivative [Line Items]
Remaining Years to Maturity	0 days