CONSOLIDATION AND BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) investment
Schedule of Equity Method Investments [Line Items]
Number of equity method investments sold | investment			1
Gain on sale of investment in unconsolidated affiliate	$ 0	$ 733
Unnamed pharmacy joint venture
Schedule of Equity Method Investments [Line Items]
Gain on sale of investment in unconsolidated affiliate		$ 733	$ 1,366