DISCONTINUED OPERATIONS - Additional Information (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Aug. 27, 2015	Mar. 31, 2014	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 20, 2015
Discontinued Operations
Total consideration received	$ 24,600
PBM Services
Discontinued Operations
Gain on sale before income taxes				$ (11,424)	$ 0	$ 0
Reduction in total consideration							$ 1,000
Home Health Services
Discontinued Operations
Gain on sale before income taxes				$ 0	$ (2,067)	$ 0
Amendment No. 1 | Home Health Services
Discontinued Operations
Total consideration received		$ 59,500
Additional payment received		1,100
Final Purchase Price received		$ 60,600
Subsequent Event
Discontinued Operations
Payments for legal settlements			$ 6,200
Fees paid to Relator			$ 200