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Investment Securities Available for Sale, at Fair Value - Schedule of Investment Securities Available for Sale (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Fair Value Option |  |
Amortized Cost | $ 102,278 | $ 154,581
Unrealized Gains | 23,226 | 19,517
Unrealized Losses | (9,580) | (2,774)
Fair Value | 115,924 | 171,324
CECL Securities |  |
Amortized Cost | 25,526 | 27,743
Unrealized Gains | 0 | 1,787
Unrealized Losses | (944) | (10)
Fair Value | 24,582 | 29,520
Total CECL Securities and Fair Value Option |  |
Amortized Cost | 127,804 | 182,324
Unrealized Gains | 23,226 | 21,304
Unrealized Losses | (10,524) | (2,784)
Fair Value | 140,506 | 200,844
Non-Agency RMBS |  |
Fair Value Option |  |
Amortized Cost | 50,307 | 100,186
Unrealized Gains | 7,009 | 949
Unrealized Losses | (7,076) | (2,636)
Fair Value | 50,240 | 98,499
CECL Securities |  |
Amortized Cost | 25,526 | 27,743
Unrealized Gains | 0 | 1,787
Unrealized Losses | (944) | (10)
Fair Value | 24,582 | 29,520
CMBS |  |
Fair Value Option |  |
Amortized Cost | 32,600 | 32,600
Unrealized Gains | 0 | 684
Unrealized Losses | (2,504) | (138)
Fair Value | 30,096 | 33,146
ABS |  |
Fair Value Option |  |
Amortized Cost | 19,371 | 21,795
Unrealized Gains | 16,217 | 17,884
Unrealized Losses | 0 | 0
Fair Value | $ 35,588 | $ 39,679

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