Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other Liabilities [Abstract]
Payable for purchase of unsettled Agency MBS	$ 0	$ 132,026
Dividends and dividend equivalents payable	35,789	35,769
Lease liability	43,508	45,314
Accrued interest payable	32,445	23,040
Accrued expenses and other	106,569	75,321
Total Other Liabilities	$ 218,311	$ 311,470
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Total Other Liabilities	Total Other Liabilities