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INVESTMENT SECURITIES - General Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Nov. 26, 2019
Sep. 30, 2022
Sep. 30, 2022
Dec. 31, 2021
Marketable Securities [Line Items]        
Share purchased   26,355 126,133  
Purchase price of shares   $ 500 $ 2,300  
Equity Method Investments   0 0 $ 0
Investment in Alpine Income Property Trust, Inc.   $ 35,260 $ 35,260 41,037
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units        
Marketable Securities [Line Items]        
Number of shares owned   2,170,000 2,170,000  
Investment in Alpine Income Property Trust, Inc.   $ 35,260 $ 35,260 $ 41,037
Investment ownership percentage (as a percent)   16.00% 16.00%  
Common Stock        
Marketable Securities [Line Items]        
Share purchased     950,011 8,088
Purchase price of shares       $ 100
Investment in Alpine Income Property Trust, Inc.   $ 15,409 $ 15,409 $ 16,511
Investment ownership percentage (as a percent)   8.00% 8.00%  
Common Stock | IPO Purchase        
Marketable Securities [Line Items]        
Share purchased 421,053      
Purchase price of shares $ 8,000      
Alpine Income Property OP, LP Limited Partnership Units        
Marketable Securities [Line Items]        
Share purchased     1,223,854  
Investment ownership percentage (as a percent)   9.00% 9.00%  
Alpine        
Marketable Securities [Line Items]        
Share purchased     950,011