Acquisitions, Goodwill, and Other Intangible Assets (Details) - USD ($) $ in Thousands				6 Months Ended
	Oct. 03, 2016	Feb. 10, 2016	Jan. 19, 2016	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 148,300	$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Fair value of contingent consideration				14,000		$ 5,200
Goodwill				441,000		$ 389,200
ExecuPharm Inc. [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 148,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	20,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash paid, net of cash acquired	148,900
Fair value of contingent consideration	9,400
Net purchase price		$ 167,200
Accounts receivable	29,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	900
Definite-lived intangible assets	87,100			87,100
Goodwill	58,600
Total assets acquired	175,900
Total liabilities assumed	8,700
Net assets acquired:	167,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	8,700
ExecuPharm Inc. [Member] | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Definite-lived intangible assets				$ 85,500
Estimated Useful Life (Years)				15 years
ExecuPharm Inc. [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Definite-lived intangible assets	$ 1,600
Estimated Useful Life (Years)	2 years
Health Advances Acquisition [Member]
Business Acquisition [Line Items]
Business Combination, Receivable from Working Capital Adjustment				$ 200
Payments to Acquire Businesses, Net of Cash Acquired		67,100	$ 67,100
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			15,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Fair value of contingent consideration				4,500
Net purchase price		$ 71,600
Accounts receivable				4,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets				700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				1,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets			200
Definite-lived intangible assets			15,000	15,000
Goodwill			52,500
Total assets acquired				73,400
Total liabilities assumed				1,800
Net assets acquired:				71,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities				1,800
Health Advances Acquisition [Member] | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Definite-lived intangible assets				$ 11,600
Estimated Useful Life (Years)				10 years
Health Advances Acquisition [Member] | Technology
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Definite-lived intangible assets				$ 1,800
Estimated Useful Life (Years)				3 years
Health Advances Acquisition [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Definite-lived intangible assets			$ 1,600
Estimated Useful Life (Years)			5 years
Payment Deferral [Member] | ExecuPharm Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Fair value of contingent consideration	$ 9,300