Advances - Outstanding by the Earlier of Contractual Maturity or Next Put Date (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 5,101	$ 12,332
Due in one year or less	20,240,466	25,199,892
Due after one year through two years	8,603,422	11,652,840
Due after two years through three years	2,001,019	2,834,790
Due after three years through four years	965,814	1,367,576
Due after four years through five years	1,598,254	1,152,468
Thereafter	1,169,811	1,048,487
Total par value	$ 34,583,887	$ 43,268,385