Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	$ 5,851,752	$ 4,899,090
Trading Securities, Net Unrealized Gain (Loss)	19,970	(38,032)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	1,497	21,275
Trading Securities, Net Unrealized Gain (Loss)	0	(60)
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	5,713,746	4,792,695
Trading Securities, Net Unrealized Gain (Loss)	21,154	(37,439)
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	88,189	62,230
Trading Securities, Net Unrealized Gain (Loss)	(1,371)	(566)
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	48,320	22,890
Trading Securities, Net Unrealized Gain (Loss)	$ 187	$ 33