Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	$ 8,650,229	$ 9,333,270
Repurchase agreements	8,020,207	8,603,011
Available-for-sale securities
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	8,126,028	7,426,953
Mortgage servicing rights
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	463,529	667,238
Repurchase agreements	272,572	309,000
Mortgage servicing rights | Variable Funding Note
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	214,000	309,000
Mortgage servicing rights | Term notes payable
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	58,600
Restricted cash
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	12,375	324,654
Due from counterparties
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	36,420	22,055
Derivative assets
Assets Sold under Agreements to Repurchase [Line Items]
Assets pledged or restricted as collateral for repurchase agreements	11,877	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