Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2024		Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
TBA securities		$ 8,386		$ 54,361
TBA securities		1,314		0
Long position | TBA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
TBA securities		8,386		54,361
TBA securities		1,314		0
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MBS		0		0
Mortgage loans		0		0
Total assets		0		0
Total liabilities		0		0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MBS				6,038,845
Mortgage loans		0		0
Total assets		5,848,945		6,093,206
Total liabilities		1,314		0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MBS		0		103
Mortgage loans		1,531		1,793
Total assets		1,531		1,896
Total liabilities		0		0
Fair Value, Measurements, Recurring | TBA securities | Level 1 | Long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
TBA securities		0		0
TBA securities		0		0
Fair Value, Measurements, Recurring | TBA securities | Level 2 | Long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MBS		5,840,559
TBA securities	[1]	8,386		54,361
TBA securities		1,314	[1]	0
Fair Value, Measurements, Recurring | TBA securities | Level 3 | Long position
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
TBA securities		0		0
TBA securities		$ 0		$ 0

[1] TBA securities are reflected on consolidated balance sheets at their implied fair value, net of implied cost basis. Please refer to Note 5 for additional information.