Mortgage Loans (Mortgage Loans Held For Portfolio) (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Residential Mortgage Loans [Line Items]
MORTGAGE LOANS HELD FOR PORTFOLIO, NET		$ 8,719,897	$ 8,352,713
Fixed rates, medium-term [Member] | Single-family mortgage [Member]
Residential Mortgage Loans [Line Items]
Total unpaid principal balance	[1]	988,507	1,055,326
Fixed rates, long-term [Member] | Single-family mortgage [Member]
Residential Mortgage Loans [Line Items]
Total unpaid principal balance		7,660,125	7,227,825
Residential Portfolio Segment [Member]
Residential Mortgage Loans [Line Items]
Financing Receivable, Accrued Interest, after Allowance for Credit Loss		$ 49,332	$ 45,669
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
Total unpaid principal balance		$ 8,648,632	$ 8,283,151
Premiums		95,453	94,485
Discounts		(6,253)	(5,591)
Deferred loan costs, net		36	39
Hedging adjustments		(13,656)	(13,840)
Total before allowance for credit losses on mortgage loans		8,724,212	8,358,244
Allowance for credit losses on mortgage loans		(4,315)	(5,531)
MORTGAGE LOANS HELD FOR PORTFOLIO, NET		$ 8,719,897	$ 8,352,713

[1] Medium-term defined as a term of 15 years or less at origination.