Mortgage Loans - Loan Restructuring - Financial Impacts (Details) - Single-family	3 Months Ended
	Mar. 31, 2024 USD ($) mo	Mar. 31, 2023 USD ($) mo
20- and 30-year or more, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction		1.08%
Weighted-Average Term Extension (in Months) | mo	163	175
Average amount capitalized as a result of a payment delay	$ 13,886	$ 16,984
15-year or less, amortizing fixed-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.54%	0.74%
Weighted-Average Term Extension (in Months) | mo	83	54
Average amount capitalized as a result of a payment delay	$ 13,893	$ 14,558
Adjustable-rate
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	2.00%	2.00%
Average amount capitalized as a result of a payment delay	$ 13,238	$ 15,629
Other
Loans in Mortgage Portfolio [Line Items]
Weighted-Average Interest Rate Reduction	1.19%	1.54%
Weighted-Average Term Extension (in Months) | mo	172	185
Average amount capitalized as a result of a payment delay	$ 17,515	$ 20,269