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Investment Securities Available For Sale, at Fair Value (Tables)
9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities Reconciliation The Company's investment securities available for sale consisted of the following as of September 30, 2023 and December 31, 2022, respectively (dollar amounts in thousands):
 September 30, 2023December 31, 2022
Amortized CostUnrealizedFair ValueAmortized CostUnrealizedFair Value
 GainsLossesGainsLosses
Fair Value Option
Agency RMBS
Fixed rate
Fannie Mae$868,656 $64 $(18,193)$850,527 $— $— $— $— 
Freddie Mac591,245 — (18,977)572,268 — — — — 
Total Fixed rate
1,459,901 64 (37,170)1,422,795 — — — — 
Adjustable rate
Fannie Mae43,377 — (1,036)42,341 — — — — 
Freddie Mac28,803 — (522)28,281 — — — — 
Total Adjustable rate
72,180 — (1,558)70,622 — — — — 
Interest-only
Ginnie Mae
42,205 107 (725)41,587 — — — — 
Total Interest-only
42,205 107 (725)41,587 — — — — 
Total Agency RMBS
1,574,286 171 (39,453)1,535,004 — — — — 
Non-Agency RMBS
42,059 8,729 (13,161)37,627 48,958 9,436 (13,469)44,925 
CMBS6,000 — (352)5,648 32,033 — (1,900)30,133 
ABS
— — — — 797 59 — 856 
Total investment securities available for sale - fair value option
1,622,345 8,900 (52,966)1,578,279 81,788 9,495 (15,369)75,914 
CECL Securities
Non-Agency RMBS25,763 — (1,827)23,936 25,616 — (1,971)23,645 
Total investment securities available for sale - CECL Securities
25,763 — (1,827)23,936 25,616 — (1,971)23,645 
Total
$1,648,108 $8,900 $(54,793)$1,602,215 $107,404 $9,495 $(17,340)$99,559 
Schedule of Investments Securities Sold
The following table summarizes our investment securities sold during the three months ended September 30, 2023 and 2022, respectively (dollar amounts in thousands):

Three Months Ended September 30, 2023
Sales Proceeds Realized GainsRealized LossesNet Realized Gains (Losses)
CMBS
$24,772 $— $(1,035)$(1,035)
Total $24,772 $— $(1,035)$(1,035)

Three Months Ended September 30, 2022
Sales Proceeds Realized GainsRealized LossesNet Realized Gains (Losses)
ABS$36,215 $18,001 $— $18,001 
Total $36,215 $18,001 $— $18,001 

The following table summarizes our investment securities sold during the nine months ended September 30, 2023 and 2022, respectively (dollar amounts in thousands):

Nine Months Ended September 30, 2023
Sales Proceeds Realized GainsRealized LossesNet Realized Gains (Losses)
ABS$595 $— $(41)$(41)
CMBS
24,772 — (1,035)(1,035)
Total $25,367 $— $(1,076)$(1,076)


Nine Months Ended September 30, 2022
Sales Proceeds Realized GainsRealized LossesNet Realized Gains (Losses)
Non-Agency RMBS$24,374 $374 $— $374 
ABS36,215 18,001 — 18,001 
Total $60,589 $18,375 $— $18,375 
Schedule of Weighted Average Lives of Investment Securities
The following table sets forth the weighted average lives of our investment securities available for sale as of September 30, 2023 and December 31, 2022, respectively (dollar amounts in thousands):
Weighted Average LifeSeptember 30, 2023December 31, 2022
0 to 5 years$42,759 $39,655 
Over 5 to 10 years1,546,244 46,558 
10+ years13,212 13,346 
Total$1,602,215 $99,559 
Schedule of Investment Securities Available-for-sale in an Unrealized Loss Position
The following table presents the Company's CECL Securities in an unrealized loss position with no credit losses reported, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2023 and December 31, 2022, respectively (dollar amounts in thousands):

September 30, 2023Less than 12 monthsGreater than 12 monthsTotal
Carrying
Value
Gross
Unrealized
Losses
Carrying
Value
Gross
Unrealized
Losses
Carrying
Value
Gross
Unrealized
Losses
Non-Agency RMBS$— $— $23,936 $(1,827)$23,936 $(1,827)
Total
$— $— $23,936 $(1,827)$23,936 $(1,827)

December 31, 2022Less than 12 monthsGreater than 12 monthsTotal
 Carrying
Value
Gross
Unrealized
Losses
Carrying
Value
Gross
Unrealized
Losses
Carrying
Value
Gross
Unrealized
Losses
Non-Agency RMBS$23,609 $(1,966)$36 $(5)$23,645 $(1,971)
Total $23,609 $(1,966)$36 $(5)$23,645 $(1,971)