Financial Derivatives (Schedule of Financial Derivatives) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	$ 152,834	$ 142,723
Financial derivatives–liabilities, at fair value-	(47,374)	(53,073)
Total	105,460	89,650
TBA Securities, Purchase Contracts [Member]
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	34	87
Financial derivatives–liabilities, at fair value-	(329)	(54)
TBA Securities, Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	4,585	170
Financial derivatives–liabilities, at fair value-	(1,277)	(544)
Interest rate swaps \| Short
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	98,514	76,670
Financial derivatives–liabilities, at fair value-	(5,250)	(13,411)
Interest rate swaps \| Long
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	36,632	52,228
Financial derivatives–liabilities, at fair value-	(31,502)	(13,386)
Credit default swaps on asset-backed indices
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	2,207	2,206
Credit default swaps on corporate bonds
Derivatives, Fair Value [Line Items]
Financial derivatives–liabilities, at fair value-	(134)	(155)
Credit default swaps on corporate bond indices
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	1,348	4,621
Financial derivatives–liabilities, at fair value-	(5,285)	(25,407)
Total return swaps
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	54	24
Futures
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	1,534	1,095
Financial derivatives–liabilities, at fair value-	(527)	(45)
Futures \| Short
Derivatives, Fair Value [Line Items]
Total	1,007	1,050
Forwards
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	67	14
Financial derivatives–liabilities, at fair value-	90	69
Warrants
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	1	1
Options
Derivatives, Fair Value [Line Items]
Financial derivatives–assets, at fair value	7,858	5,607
Credit Default Swap, Asset Backed Securities
Derivatives, Fair Value [Line Items]
Financial derivatives–liabilities, at fair value-	(2)	(2)
Exchange Traded Options
Derivatives, Fair Value [Line Items]
Financial derivatives–liabilities, at fair value-	$ (2,978)	$ 0