Two Harbors Investment Corp. Quarterly report pursuant to Section 13 or 15(d)

Available-for-sale Securities, Rollforward of the Allowance for Credit Losses (Details)

Available-for-sale Securities, Rollforward of the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 5,360	$ (9,663)	$ (6,958)	$ (14,238)
Additions on securities for which credit losses were not previously recorded	39	(605)	(406)	(899)
Increase (decrease) on securities with previously recorded credit losses	(137)	(792)	623	(2,149)
Writeoffs	(706)	2,525	2,185	8,751
Allowance for credit losses at end of period	(4,556)	(8,535)	(4,556)	(8,535)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	(5,087)	(9,403)	(6,785)	(12,851)
Additions on securities for which credit losses were not previously recorded	(36)	(427)	(45)	(462)
Increase (decrease) on securities with previously recorded credit losses	162	(1,020)	600	(3,763)
Writeoffs	706	2,525	1,975	8,751
Allowance for credit losses at end of period	(4,255)	(8,325)	(4,255)	(8,325)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	(273)	(260)	(173)	(1,387)
Additions on securities for which credit losses were not previously recorded	(3)	(178)	(361)	(437)
Increase (decrease) on securities with previously recorded credit losses	(25)	228	23	1,614
Writeoffs	0	0	210	0
Allowance for credit losses at end of period	$ (301)	$ (210)	$ (301)	$ (210)