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INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INCOME TAXES
Period of disqualification of REIT status	4 years
Approximate allocation of the distributions made to stockholders (percentages):
Ordinary income	53.00%	54.00%	43.00%
Capital gains	47.00%	46.00%	57.00%
Total distributions made to stockholders	100.00%	100.00%	100.00%
Reconciliation between dividends declared with the dividends paid deduction
Dividends declared	$ 38,116	$ 37,915	$ 37,478
Dividend reinvestment plan	157	102	35
Dividends before adjustments	38,273	38,017	37,513
Less: Spillover dividends designated to previous year	(4,240)
Less: Spillover dividends designated to following year			(2,085)
Plus: Dividends designated from prior year		2,085	9,261
Plus: Dividends designated from following year	737	4,240
Dividends paid deduction	$ 34,770	$ 44,342	$ 44,689
Percentage of discount on common stock purchased through the dividend reinvestment plan	3.00%	3.00%	3.00%
Maximum
Reconciliation between dividends declared with the dividends paid deduction
Percentage of discount on common stock purchased through the dividend reinvestment plan	5.00%

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