Quarterly report pursuant to Section 13 or 15(d)

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets (Details)

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Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements $ 9,713,760 $ 9,086,045
Repurchase agreements 9,113,270 8,603,011
Available-for-sale securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 8,822,484 7,426,953
Mortgage servicing rights    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 503,611 667,238
Repurchase agreements 277,816 309,000
Mortgage servicing rights | Variable Funding Note    
Assets Sold under Agreements to Repurchase [Line Items]    
Repurchase agreements 219,800 309,000
Mortgage servicing rights | Term notes payable    
Assets Sold under Agreements to Repurchase [Line Items]    
Repurchase agreements 58,100  
Restricted cash    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 343,092 77,429
Due from counterparties    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 34,942 22,055
Derivative assets    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 9,631 14,738
US Treasury Securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets pledged or restricted as collateral for repurchase agreements 0 877,632
Repurchase agreements $ 0 $ 888,295