OPERATING AND REPORTABLE SEGMENTS OPERATING AND REPORTABLE SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Gross									$ 675,684	$ 471,506	$ 365,526
Sales Revenue, Services, Other									166,511	191,131	188,980
Revenues	243,512	208,879	190,733	199,071	180,738	170,365	155,901	155,633	842,195	662,637	554,506
Adjusted EBITDA									80,671	67,824	71,204
Interest expense, net									(28,197)	(26,067)	(25,542)
Loss on extinguishment of debt									(15,898)	0	0
Income tax benefit (expense)									(2,538)	4,439	(435)
Depreciation									(13,555)	(8,513)	(6,591)
Amortization of intangibles									(6,671)	(3,957)	(3,376)
Stock-based compensation expense									(9,450)	(6,122)	(4,467)
Acquisition and integration expenses									(16,130)	(4,046)	0
Restructuring and other expenses and investments									(9,796)	(5,143)	(7,909)
Income (Loss) from Continuing Operations Attributable to Parent	(15,377)	(22,442)	(8,317)	(7,470)	(1,419)	(605)	(4,293)	(2,023)	(53,606)	(8,340)	(424)
Expenditures for Additions to Long-Lived Assets									25,617	10,986	7,853
Assets	936,858				642,376				936,858	642,376	677,102
Goodwill	605,121				350,810				605,121	350,810	312,387
Infusion Services
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Gross									675,684	471,506	365,526
Sales Revenue, Services, Other									21,643	10,080	8,756
Revenues									697,327	481,586	374,282
Adjusted EBITDA									60,677	36,764	35,128
Depreciation									(8,640)	(4,347)	(5,242)
Expenditures for Additions to Long-Lived Assets									15,972	6,685	4,826
Assets	794,006				438,623				794,006	438,623	353,999
Goodwill	558,593				304,282				558,593	304,282	265,859
Home Health Services
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									72,276	69,190	69,635
Adjusted EBITDA									2,884	5,401	5,954
Depreciation									(75)	(111)	(48)
Expenditures for Additions to Long-Lived Assets									69	171	170
Assets	64,428				62,403				64,428	62,403	64,672
Goodwill	33,784				33,784				33,784	33,784	33,784
PBM Services
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									72,592	111,861	110,589
Adjusted EBITDA									17,110	25,659	30,122
Depreciation									0	0	0
Expenditures for Additions to Long-Lived Assets									0	0	0
Assets	25,239				36,354				25,239	36,354	40,418
Goodwill	12,744				12,744				12,744	12,744	12,744
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA									(32,042)	(26,755)	(23,308)
Depreciation									(4,840)	(4,055)	(1,301)
Expenditures for Additions to Long-Lived Assets									9,576	4,130	2,857
Assets	53,169				95,813				53,169	95,813	24,348
Assets from discontinued operations
Segment Reporting Information [Line Items]
Assets	0				0				0	0	59,005
Assets associated with discontinued operations, not sold
Segment Reporting Information [Line Items]
Assets	$ 16				$ 9,183				$ 16	$ 9,183	$ 134,660