COMMITMENTS AND CONTINGENCIES (Details)	3 Months Ended		6 Months Ended
	Sep. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2015 USD ($) $ / Violation	Aug. 24, 2012 Recipients $ / Violation
Loss Contingencies [Line Items]
Litigation settlement expense in connection with the California False Claims Act lawsuit		$ 34,500,000
Previously recorded litigation reserve in connection with the California False Claims Act lawsuit		$ 15,000,000
Litigation Settlement, Gross	$ 49.5
Payment reduction by Assembly Bill No. 97			10.00%
Percent of lowest maximum (cap on payments)			80.00%
Loss Contingency, Damages Awarded, Value			$ 50,000,000
Loss Contingency Damages Awarded Gross			20,800,000
Number of Recipients | Recipients				39
Proposed damages per violation | $ / Violation				0.0005
Loss Contingency Damages Awarded Net			$ 15,800,000
Reduction for Plaintiff Negligence			25.00%
Company's apportioned responsibility			50.00%
Co-defendant's apportioned responsibility			50.00%
Loss contingency reduced damages awarded gross			$ 5,000,000
Loss contingency reduced damages awarded net			4,400,000
Letters of Credit Outstanding, Amount			$ 45,400,000
Tri-State Clinical Laboratory Services, LLC [Member]
Loss Contingencies [Line Items]
Ownership interest percentage, parent		50.00%
Minimum [Member]
Loss Contingencies [Line Items]
Proposed damages per violation | $ / Violation			0.000001
Maximum [Member]
Loss Contingencies [Line Items]
Proposed damages per violation | $ / Violation			0.0001