Description of Business and Summary of Significant Accounting Policies (Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Sep. 01, 2015	Jun. 01, 2015	Mar. 03, 2015	Dec. 02, 2014	Dec. 01, 2014	Nov. 03, 2014	May. 21, 2014	Jan. 27, 2014
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Business acquisition, purchase price allocation, goodwill	402,220,000	337,068,000	337,068,000	$ 402,259,000
Goodwill [Roll Forward]
Goodwill, beginning balance	402,220,000	337,068,000
Additions, net	8,868,000	68,503,000
Goodwill, Purchase Accounting Adjustments	(2,099,000)	0
Goodwill, Transfers	(1,783,000)	0
Foreign currency translation adjustments	(4,947,000)	(3,351,000)
Goodwill, ending balance	$ 402,259,000	402,220,000	$ 337,068,000
Fair Value Inputs, Discount Rate	1.75%
Curepet, Healthcare Magic, Vertex, Oakstone, I3 [Member]
Goodwill [Roll Forward]
Additions, net		68,503,000
Final Allocation | Via Media Health [Member]
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill							$ 2,042,000
Final Allocation | PB Systems [Member]
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill						$ 6,826,000
Final Allocation | Via Media Health, PB Systems, Curepet, and I3 [Member]
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill	$ 4,986,000			4,986,000
Goodwill [Roll Forward]
Goodwill, ending balance	4,986,000
Final Allocation | Curepet, Inc.
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill					$ (1,783,000)							$ 2,687,000
Final Allocation | Healthcare Magic
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill											$ 5,619,000
Final Allocation | Qatarlyst
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill										$ 27,728,000
Final Allocation | Oakstone
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill								$ 28,769,000
Final Allocation | I3
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill									$ 1,602,000
Final Allocation | Curepet, Healthcare Magic, Vertex, Oakstone, I3 [Member]
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill	68,503,000	68,503,000
Goodwill [Roll Forward]
Goodwill, beginning balance	68,503,000
Goodwill, ending balance		$ 68,503,000
Final Allocation Adjustment [Member] | I3
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill									(2,099,000)
Preliminary Allocation [Member] | I3
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill									$ 3,700,000
RCS
Goodwill [Line Items]
Reporting Unit, Assessed Fair Value				102,000,000
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount				$ 13,500,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount				15.00%
Reporting Unit, Excess Carrying Value of Assessed Fair Value				$ 88,500,000
Business acquisition, purchase price allocation, goodwill	64,000,000			$ 64,000,000
Goodwill [Roll Forward]
Goodwill, ending balance	$ 64,000,000
Fair Value Inputs, Discount Rate	16.00%
Minimum [Member] | RCS
Goodwill [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	2.00%
Maximum [Member] | RCS
Goodwill [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	3.00%