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Derivatives - Derivative Information about Carrying Value by Type on the Balance Sheet Location (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Derivative [Line Items]    
Derivative assets $ 174 $ 7,102
Derivative liabilities 23,621 22,595
Options on U.S. Treasury futures    
Derivative [Line Items]    
Derivative assets 0 5,859
TBA securities | Long position    
Derivative [Line Items]    
Derivative assets 174 1,243
Derivative liabilities $ 23,621 $ 22,595