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SECURITIES - Securities by Remaining Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | $ 331,233 | $ 379,700
1-5 years | 188,544 | 207,590
5-10 years | 138 | 130
After 10 years | 0 | 0
Total | 519,895 | 587,400
Allowance for current expected credit losses | (20) | (20)
Equity securities | 100 | 100
CMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | 304,060 | 346,272
1-5 years | 181,131 | 195,061
5-10 years | 0 | 0
After 10 years | 0 | 0
Total | 485,191 | 541,333
CMBS interest-only |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | 2,365 | 937
1-5 years | 7,172 | 9,506
5-10 years | 0 | 0
After 10 years | 0 | 0
Total | 9,537 | 10,443
GNMA interest-only |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | 36 | 40
1-5 years | 210 | 111
5-10 years | 138 | 130
After 10 years | 0 | 0
Total | 384 | 281
Agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | 0 | 0
1-5 years | 31 | 35
5-10 years | 0 | 0
After 10 years | 0 | 0
Total | 31 | 35
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Within 1 year | 24,772 | 32,451
1-5 years | 0 | 2,877
5-10 years | 0 | 0
After 10 years | 0 | 0
Total | $ 24,772 | $ 35,328

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