TWO Annual report [Section 13 and 15(d), not S-K Item 405]

Derivative Instruments and Hedging Activities - Notional Amounts of Derivative Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Average notional amount	$ (17,967,167)	$ (13,025,485)	$ (1,923,988)
Inverse interest-only securities
Derivative [Line Items]
Average notional amount	(1,160,015)	(149,602)	(180,080)
Interest rate swap agreements
Derivative [Line Items]
Average notional amount	(17,125,785)	(14,147,884)	(7,974,494)
Swaptions, net
Derivative [Line Items]
Average notional amount	0	(57,923)	(161,644)
TBAs
Derivative [Line Items]
Average notional amount	(3,606,103)	(4,235,543)	(3,016,532)
Futures, net
Derivative [Line Items]
Average notional amount	(3,970,411)	(5,501,400)	(9,085,474)
Interest rate lock commitments
Derivative [Line Items]
Average notional amount	(38,238)	(25,879)	0
Forward mortgage loan sale commitments
Derivative [Line Items]
Average notional amount	$ (7,437)	$ (25,900)	$ 0