QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								10 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues from continuing operations	$ 64,622	$ 64,332	$ 68,360	$ 68,617	$ 70,002	$ 68,460	$ 69,237	$ 69,249		$ 265,931	$ 276,948	$ 262,827
Gain on sale of real estate	0	14,927	0	24,739	3,092	0	0	0		39,666	3,092	0
Net income (loss) from continuing operations	(3,153)	8,382	(810)	26,293	3,697	601	1,802	12		30,712	6,112	13,143
Net income from discontinued operations	792	703	1,668	690	7,751	4,640	3,180	2,720	$ 11,455	3,853	18,291	11,455
Net income (loss)	(2,361)	9,085	858	26,983	11,448	5,241	4,982	2,732		34,565	24,403	24,598
Net income (loss) attributable to the Company	(2,370)	9,088	849	26,980	11,442	5,242	4,976	2,732		34,547	24,392	24,378
Redeemable preferred stock dividends	(9)	0	0	0	0	0	0	0		(9)	0	0
Net income (loss) available to common stockholders	$ (2,379)	$ 9,088	$ 849	$ 26,980	$ 11,442	$ 5,242	$ 4,976	$ 2,732		$ 34,538	$ 24,392	$ 24,378
BASIC AND DILUTED NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS PER SHARE (1):
Continuing operations	$ (0.04)	$ 0.10	$ (0.01)	$ 0.27	$ 0.04	$ 0.01	$ 0.02	$ 0.00		$ 0.34	$ 0.06	$ 0.13
Discontinued operations	0.01	0.01	0.02	0.01	0.08	0.05	0.03	0.03		0.04	0.19	0.12
Net income	$ (0.03)	$ 0.10	$ 0.01	$ 0.28	$ 0.12	$ 0.05	$ 0.05	$ 0.03		$ 0.38	$ 0.25	$ 0.25
Weighted average shares of Common Stock outstanding - basic (in shares)	84,048	87,045	96,683	97,662	97,590	97,590	97,589	97,582		91,328	97,588	97,173
Weighted average shares of Common Stock outstanding - diluted (in shares)	84,048	87,045	96,683	97,662	97,590	97,590	97,589	97,582		91,328	97,588	97,176
Continuing Operations
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues from continuing operations	$ 64,622	$ 64,332	$ 65,438	$ 66,390	$ 67,874	$ 66,395	$ 66,919	$ 67,239
Net income (loss) from continuing operations	(3,153)	8,382	(1,965)	25,554	3,123	233	998	(230)
Subsequently Reclassified From Discontinued Operations
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues from continuing operations	0	0	2,922	2,227	2,128	2,065	2,318	2,010
Net income (loss) from continuing operations	0	0	1,155	739	574	368	804	242
Discontinued Operations
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Net income from discontinued operations	792	703	2,823	1,429	8,325	5,008	3,984	2,962
Subsequently Reclassified To Continuing Operations
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Net income from discontinued operations	$ 0	$ 0	$ (1,155)	$ (739)	$ (574)	$ (368)	$ (804)	$ (242)