SHAREHOLDERS EQUITY (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
Quarterly cash payment that may be made under Dividend Reinvestment Program	$ 200,000
Percent of fair market value which shares may be purchased at under the DRIP	97.00%
Fair market value discount	3.00%
Common stock, shares subscribed but unissued	542,302
Purchase of shares (dividend reinvestment program), shares	778,407
Sales of shares (dividend reinvestment program)	$ 16,677,000	$ 36,588,000	$ 22,461,000
Shares purchased under voluntary purchase		1,202,180
Plan [Member]
Class Of Stock [Line Items]
Sales of shares (Dividend Reinvestment Program), shares	1,320,709	1,204,710