Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule of Trading Securities [Line Items]
Trading securities	$ 4,891,096	$ 9,136,813
Trading Securities, Net Unrealized Gain (Loss)	(136,074)	(9,290)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	13,513	23,610
Trading Securities, Net Unrealized Gain (Loss)	(10)	40
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	4,827,504	9,068,900
Trading Securities, Net Unrealized Gain (Loss)	(135,438)	(9,338)
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	24,539	25,783
Trading Securities, Net Unrealized Gain (Loss)	(478)	34
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	25,540	18,520
Trading Securities, Net Unrealized Gain (Loss)	$ (148)	$ (26)