ACQUISITIONS AND PRO FORMA RESULTS (Pro Forma Financial Information Summarization Results of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Total revenue from continuing operations	$ 940,005	$ 921,998	$ 803,073
Net income from continuing operations	$ 10,694	$ 40,721	$ 35,796
Net income per share
Basic (in dollars per share)	$ 0.31	$ 1.26	$ 1.10