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Investment Securities Available for Sale, at Fair Value - Schedule of Investment Securities Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value Option
Amortized Cost	$ 183,307	$ 81,788
Unrealized Gains	9,962	9,495
Unrealized Losses	(14,982)	(15,369)
Fair Value	178,287	75,914
CECL Securities
Amortized Cost	25,663	25,616
Unrealized Gains	0	0
Unrealized Losses	(1,379)	(1,971)
Fair Value	24,284	23,645
Total CECL Securities and Fair Value Option
Amortized Cost	208,970	107,404
Unrealized Gains	9,962	9,495
Unrealized Losses	(16,361)	(17,340)
Fair Value	202,571	99,559
Agency RMBS
Fair Value Option
Amortized Cost	106,116	0
Unrealized Gains	1,084	0
Unrealized Losses	0	0
Fair Value	107,200	0
Non-Agency RMBS
Fair Value Option
Amortized Cost	44,483	48,958
Unrealized Gains	8,878	9,436
Unrealized Losses	(13,434)	(13,469)
Fair Value	39,927	44,925
CECL Securities
Amortized Cost	25,663	25,616
Unrealized Gains	0	0
Unrealized Losses	(1,379)	(1,971)
Fair Value	24,284	23,645
CMBS
Fair Value Option
Amortized Cost	32,025	32,033
Unrealized Gains	0	0
Unrealized Losses	(1,357)	(1,900)
Fair Value	30,668	30,133
ABS
Fair Value Option
Amortized Cost	683	797
Unrealized Gains	0	59
Unrealized Losses	(191)	0
Fair Value	$ 492	$ 856

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