DISCONTINUED OPERATIONS - Operating Results of Discontinued Operations (Details) - PBM Services - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 0	$ 17,324
Gross profit	0	3,636
Other operating expenses, net	(383)	6,041
Bad debt expense	0	(26)
Income (loss) before income taxes	383	(2,379)
Income tax expense (benefit)	150	0
Total income (loss) from discontinued operations, net of income taxes	$ 233	$ (2,379)