Derivatives - Derivative Information about Carrying Value by Type on the Balance Sheet Location (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative assets	$ 133,000	$ 54,361,000
Derivative liabilities	22,814,000	0
Margin Deposit Assets	219,200,000	118,200,000
Variation Margin Receivable, Derivative	10,400,000	1,300,000
TBA securities | Long position
Derivative [Line Items]
Derivative assets	133,000	54,361,000
Derivative liabilities	22,814,000	0
U.S. Treasury futures
Derivative [Line Items]
Derivative assets	1,900,000
Derivative liabilities		219,900,000
Interest rate swaps
Derivative [Line Items]
Derivative assets	$ 152,800,000
Derivative liabilities		$ 0