Advances Outstanding by Year of Contractual Maturity or Next Put Date (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Overdrawn demand-deposit accounts	$ 2,841	$ 5,101
Due in one year or less	27,048,822	20,240,466
Due after one year through two years	11,616,542	8,603,422
Due after two years through three years	2,119,533	2,001,019
Due after three years through four years	1,248,574	965,814
Due after four years through five years	1,657,924	1,598,254
Thereafter	1,222,166	1,169,811
Total par value	$ 44,916,402	$ 34,583,887