PRO FORMA FINANCIAL INFORMATION (Details) (Series of Individually Immaterial Business Acquisitions [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 223,139	$ 208,817
Depreciation and amortization	57,872	59,227
Net income	$ 64,477	$ 71,515
Net income per common share, basic (USD per share)	$ 1.39	$ 1.91
Net income per common share, diluted (USD per share)	$ 1.38	$ 1.88
Weighted-average number of common shares outstanding, basic (in shares)	46,351,544	37,514,637
Weighted-average number of common shares outstanding, diluted (in shares)	46,889,531	38,071,926
Skilled Nursing Transitional Care Facilities
Business Acquisition
Number of acquired properties	10
Senior Housing Facilities
Business Acquisition
Number of acquired properties	32	1
Acute Care Hospitals
Business Acquisition
Number of acquired properties		1