SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)
Segment reporting information
Number of reportable segments \| segment			2
Net sales	$ 1,301,197	$ 1,373,334	$ 3,845,629	$ 4,131,896
Cost of Sales	(1,237,812)	(1,279,976)	(3,630,297)	(3,849,743)
Gross Profit	63,385	93,358	215,332	282,153
Inter-segment eliminations
Segment reporting information
Net sales	(24,751)	(8,897)	(52,683)	(17,275)
Cost of Sales	24,751	8,897	52,683	17,275
Specialty
Segment reporting information
Net sales	1,243,448	1,212,298	3,627,582	3,599,023
Specialty \| Operating Segments
Segment reporting information
Net sales	1,243,448	1,212,298	3,627,582	3,599,023
Cost of Sales	(1,178,918)	(1,145,288)	(3,432,506)	(3,386,653)
Gross Profit	64,530	67,010	195,076	212,370
PBM
Segment reporting information
Net sales	82,500	169,933	270,730	550,148
PBM \| Operating Segments
Segment reporting information
Net sales	82,500	169,933	270,730	550,148
Cost of Sales	(83,645)	(143,585)	(250,474)	(480,365)
Gross Profit	$ (1,145)	$ 26,348	$ 20,256	$ 69,783

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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