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SUBSEQUENT EVENT	6 Months Ended
SUBSEQUENT EVENT	Jun. 30, 2015
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENTS Sale of Noncontrolling Interest in Subsidiary On July 1, 2015, UMass exercised its call option, acquiring an 18.9% noncontrolling interest in a subsidiary of the Company that performs diagnostic information services in a defined territory within the state of Massachusetts. In connection with the transaction, the Company paid the $50 million deferred consideration associated with the January 2, 2013 acquisition of the Massachusetts-based clinical outreach and anatomic pathology businesses from UMass and received $50 million associated with the call option exercise price. The deferred consideration is included in accounts payable and accrued expenses at June 30, 2015. Clinical Trials Central Laboratory Services Joint Venture On July 1, 2015, the Company closed a transaction with Quintiles Transnational Holdings Inc. to form a global clinical trials central laboratory services joint venture, Q² Solutions. In connection with the transaction, the Company contributed certain assets of its Clinical Trials business to the newly formed joint venture in exchange for a non-controlling, 40% ownership interest. For further details regarding the transaction, see Note 6.