Short-Term Debt - Maturities of Outstanding Advances Under Repurchase Agreements (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 7,351,846
Weighted-average maturity (in months)	3 months 15 days
Within 30 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 1,464,684
Over 30 to 90 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	4,512,313
Over 90 to 180 days
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	58,042
Over 180 days to one year
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	1,198,227
Over one year to two year
Mortgage loans sold under agreement to repurchase
Unpaid principal balance	$ 118,580