Investment in Securities (Unrealized Loss Positions Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 Months	$ 53,310	$ 301,317
Unrealized Losses, Less than 12 Months	(3,511)	(9,724)
Fair Value, Greater than 12 Months	131,733	161,996
Unrealized Losses, Greater than 12 Months	(18,235)	(28,824)
Fair Value, Total	185,043	463,313
Unrealized Loss, Total	(21,746)	(38,548)
Agency RMBS
Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 Months	10,212	70,028
Unrealized Losses, Less than 12 Months	(173)	(1,429)
Fair Value, Greater than 12 Months	115,690	153,009
Unrealized Losses, Greater than 12 Months	(15,140)	(22,640)
Fair Value, Total	125,902	223,037
Unrealized Loss, Total	(15,313)	(24,069)
Non-Agency RMBS and CMBS
Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 Months	36,683	4,600
Unrealized Losses, Less than 12 Months	(2,435)	(210)
Fair Value, Greater than 12 Months	11,181	3,266
Unrealized Losses, Greater than 12 Months	(2,101)	(593)
Fair Value, Total	47,864	7,866
Unrealized Loss, Total	(4,536)	(803)
CLOs
Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 Months		17,505
Unrealized Losses, Less than 12 Months		(633)
Fair Value, Greater than 12 Months		5
Unrealized Losses, Greater than 12 Months		0
Fair Value, Total		17,510
Unrealized Loss, Total		(633)
Other Securities
Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 Months	6,415	209,184
Unrealized Losses, Less than 12 Months	(903)	(7,452)
Fair Value, Greater than 12 Months	4,862	5,716
Unrealized Losses, Greater than 12 Months	(994)	(5,591)
Fair Value, Total	11,277	214,900
Unrealized Loss, Total	$ (1,897)	$ (13,043)