INVESTMENT SECURITIES - Available-for-sale securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Available-for-sale securities
Investment Securities	$ 39,501	$ 39,666
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units
Available-for-sale securities
Cost	44,182	44,182
Unrealized Losses in Investment Income	(4,681)	(4,516)
Investment Securities	39,501	39,666
Common Stock
Available-for-sale securities
Cost	20,929	20,929
Unrealized Losses in Investment Income	(1,891)	(1,812)
Investment Securities	19,038	19,117
Alpine Income Property OP, LP Limited Partnership Units
Available-for-sale securities
Cost	23,253	23,253
Unrealized Losses in Investment Income	(2,790)	(2,704)
Investment Securities	$ 20,463	$ 20,549