BUSINESS ACQUISITIONS - Acquired Identifiable Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Aug. 06, 2019
Business Acquisition [Line Items]
Goodwill	$ 1,427,883	$ 1,425,542
BioScrip
Business Acquisition [Line Items]
Accounts receivable, net			$ 96,532
Inventories			19,683
Property and equipment, net			48,732
Intangible assets, net			193,245
Deferred tax assets, net of deferred tax liabilities			26,731
Operating lease right-of-use asset			22,378
Operating lease liability			(28,897)
Accounts payable			(66,371)
Other assumed liabilities, net of other acquired assets			(20,233)
Total acquired identifiable assets and liabilities			291,800
Goodwill			795,414
Total consideration transferred			$ 1,087,214