COMMON STOCK ACTIVITY (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding at beginning of year (in shares)	30,937,225
Common stock offerings (in shares)	1,246,400	890,085	2,179,153
Stock Issued During Period, Value, New Issues	$ 78,868,000	$ 53,247,000	$ 109,588,000
Dividend reinvestment plan (in shares)	3,626	3,577	3,915
Shares outstanding at end of year (in shares)	32,232,587	30,937,225
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding at beginning of year (in shares)	30,937,225	29,928,490	27,658,059
Common stock offerings (in shares)	1,246,400	890,085	2,179,153
Stock options exercised (in shares)	0	4,500	4,500
Dividend reinvestment plan (in shares)	3,626	3,577	3,915
Incentive restricted stock granted (in shares)	71,642	112,099	111,732
Incentive restricted stock forfeited (in shares)	(2,375)	0	0
Director common stock awarded (in shares)	7,742	7,469	7,326
Director restricted stock granted (in shares)	0	417	0
Restricted stock withheld for tax obligations (in shares)	(31,673)	(9,412)	(36,195)
Shares outstanding at end of year (in shares)	32,232,587	30,937,225	29,928,490
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues	$ 78,868,000	$ 53,247,000	$ 109,588,000