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INVESTMENT SECURITIES - General Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended | 40 Months Ended
--- | --- | --- | --- | ---
Nov. 26, 2019 | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023
Marketable Securities [Line Items] |  |  |  |  |
Investment in Alpine Income Property Trust, Inc. |  | $ 39,259 | $ 42,041 |  | $ 39,259
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Number of shares owned |  | 2,330,000 |  |  | 2,330,000
Investment in Alpine Income Property Trust, Inc. |  | $ 39,259 | $ 42,041 |  | $ 39,259
Investment ownership percentage (as a percent) |  | 14.80% |  |  | 14.80%
Common Stock [Member] |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Share purchased | 421,053 | 129,271 | 155,665 | 8,088 | 1,108,814
Purchase price of shares | $ 8,000 | $ 2,100 | $ 2,700 | $ 100 |
Investment in Alpine Income Property Trust, Inc. |  | $ 18,662 | $ 18,690 |  | $ 18,662
Investment ownership percentage (as a percent) |  | 7.00% |  |  | 7.00%
Alpine Income Property OP, LP Limited Partnership Units |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Share purchased |  |  |  |  | 1,223,854
Investment ownership percentage (as a percent) |  | 7.80% |  |  | 7.80%

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