BASIS OF PRESENTATION- Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allowance for Doubtful Accounts Receivable, Period Increase (Decrease)	$ 3,700
Allowance for Doubtful Accounts, Percentage of Accounts Receivable	36.60%	33.50%
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 191,302	$ 198,061
Allowance for doubtful accounts	(70,107)	(66,405)
Net accounts receivable	121,195	131,656
Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	35,365	38,848
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	136,505	143,752
Patient
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	19,432	15,461
Financing Receivables. 1 to 180 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	132,395	139,150
Financing Receivables. 1 to 180 Days Past Due [Member] | Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	22,361	25,812
Financing Receivables. 1 to 180 Days Past Due [Member] | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	104,065	108,439
Financing Receivables. 1 to 180 Days Past Due [Member] | Patient
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	5,969	4,899
Financing Receivables. Greater than 180 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	58,907	58,911
Financing Receivables. Greater than 180 Days Past Due [Member] | Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	13,004	13,036
Financing Receivables. Greater than 180 Days Past Due [Member] | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	32,440	35,313
Financing Receivables. Greater than 180 Days Past Due [Member] | Patient
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 13,463	$ 10,562