Short-Term Debt - Maturities of Outstanding Advances Under Repurchase Agreements (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 5,768,570
Weighted-average maturity (in months)	2 months 18 days
Within 30 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 549,822
Over 30 to 90 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	4,673,986
Over 90 to 180 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	393,948
Over 180 days to one year
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	814
Over one year to two year
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 150,000