Trading Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Trading Securities [Line Items]
Trading securities	$ 9,136,813	$ 4,707,975
Trading Securities, Net Unrealized Gain (Loss)	(9,290)	(3,560)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	23,610	9,183
Trading Securities, Net Unrealized Gain (Loss)	40	0
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	9,068,900	4,669,148
Trading Securities, Net Unrealized Gain (Loss)	(9,338)	(3,624)
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	25,783	19,172
Trading Securities, Net Unrealized Gain (Loss)	34	42
Other debt securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	18,520	10,472
Trading Securities, Net Unrealized Gain (Loss)	$ (26)	$ 22