Financial Derivatives (Credit Default Swaps) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Financial derivatives–assets, at fair value-	$ 81,183	$ 18,894
Financial derivatives–liabilities, at fair value-	(20,442)	(12,298)
Fair Value	(60,741)	(6,596)
Credit default swaps on asset-backed indices
Derivative [Line Items]
Financial derivatives–assets, at fair value-	2,089	1,751
Financial derivatives–liabilities, at fair value-	(34)	(39)
Credit default swaps on asset-backed indices | Financial Derivatives - Liabilities | Short
Derivative [Line Items]
Notional Amount	(1)	(491)
Financial derivatives–liabilities, at fair value-	$ 0	$ 0
Credit default swaps on asset-backed indices | Financial Derivatives - Liabilities | Short | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	27 years 6 months 3 days	24 years 5 months 1 day
Credit default swaps on asset-backed indices | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount	$ (16,285)	$ (13,947)
Financial derivatives–assets, at fair value-	$ 2,085	$ 1,744
Credit default swaps on asset-backed indices | Financial Derivatives - Assets | Short | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	41 years 6 months 14 days	42 years 5 months 4 days
Credit default swaps on asset-backed securities
Derivative [Line Items]
Financial derivatives–assets, at fair value-	$ 202	$ 303
Credit default swaps on asset-backed securities | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount	(916)	(910)
Financial derivatives–assets, at fair value-	$ 202	$ 303
Credit default swaps on asset-backed securities | Financial Derivatives - Assets | Short | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	13 years 2 months 15 days	13 years 8 months 15 days
Credit default swaps
Derivative [Line Items]
Notional Amount	$ (87,648)	$ (37,190)
Fair Value	$ (3,525)	$ (202)
Credit default swaps | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	11 years 6 months 29 days	19 years 1 month 6 days
Credit default swaps on corporate bond indices
Derivative [Line Items]
Financial derivatives–assets, at fair value-	$ 1,405	$ 156
Financial derivatives–liabilities, at fair value-	0	(1,870)
Credit default swaps on corporate bond indices | Financial Derivatives - Liabilities | Short
Derivative [Line Items]
Notional Amount	0	(21,183)
Financial derivatives–liabilities, at fair value-	$ 0	$ (1,870)
Credit default swaps on corporate bond indices | Financial Derivatives - Liabilities | Short | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	0 days	4 years 9 months
Credit default swaps on corporate bond indices | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount	$ (50,561)	$ 0
Financial derivatives–assets, at fair value-	$ 1,392	$ 0
Remaining Years to Maturity	4 years 8 months 12 days	0 days
Credit default swaps on corporate bonds
Derivative [Line Items]
Financial derivatives–assets, at fair value-	$ 201	$ 0
Financial derivatives–liabilities, at fair value-	(338)	(99)
Credit default swaps on corporate bonds | Financial Derivatives - Liabilities | Short
Derivative [Line Items]
Notional Amount	(16,400)	(3,400)
Financial derivatives–liabilities, at fair value-	$ (338)	$ (99)
Credit default swaps on corporate bonds | Financial Derivatives - Liabilities | Short | Weighted Average
Derivative [Line Items]
Remaining Years to Maturity	4 years 6 months 21 days	3 years 5 months 19 days
Credit default swaps on corporate bonds | Financial Derivatives - Assets | Short
Derivative [Line Items]
Notional Amount	$ (6,000)	$ 0
Financial derivatives–assets, at fair value-	$ 201	$ 0
Remaining Years to Maturity	4 years 11 months 23 days	0 days