Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Description of Business and Summary of Significant Accounting Policies (Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Jan. 27, 2014	May 21, 2014	Nov. 03, 2014	Apr. 07, 2013	Dec. 02, 2014	Dec. 01, 2014
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill	$ 402,220us-gaap_Goodwill	$ 337,068us-gaap_Goodwill
Goodwill [Roll Forward]
Goodwill, beginning balance	337,068us-gaap_Goodwill	326,748us-gaap_Goodwill	337,068us-gaap_Goodwill
Additions, net	68,503us-gaap_GoodwillAcquiredDuringPeriod	11,136us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency translation adjustments	(3,351)us-gaap_GoodwillTranslationAdjustments	(816)us-gaap_GoodwillTranslationAdjustments
Goodwill, ending balance	402,220us-gaap_Goodwill	337,068us-gaap_Goodwill
Fair Value Inputs, Discount Rate	1.75%us-gaap_FairValueInputsDiscountRate
Qatarlyst
Goodwill [Roll Forward]
Additions, net		11,136
Curepet, Healthcare Magic, Vertex, Oakstone, I3 [Member]
Goodwill [Roll Forward]
Additions, net	68,503
Final Allocation \| Curepet, Inc.
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill				2,687
Goodwill [Roll Forward]
Goodwill, beginning balance				2,687
Goodwill, ending balance				2,687
Final Allocation \| Healthcare Magic
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill					5,619
Goodwill [Roll Forward]
Goodwill, beginning balance					5,619
Goodwill, ending balance					5,619
Final Allocation \| Qatarlyst
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill		11,136				27,728	11,136
Goodwill [Roll Forward]
Goodwill, beginning balance						27,728	11,136
Goodwill, ending balance		11,136				27,728	11,136
Final Allocation \| Oakstone
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill								28,769
Goodwill [Roll Forward]
Goodwill, beginning balance								28,769
Goodwill, ending balance								28,769
Final Allocation \| I3
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill									3,700
Goodwill [Roll Forward]
Goodwill, beginning balance									3,700
Goodwill, ending balance									3,700
Final Allocation \| Curepet, Healthcare Magic, Vertex, Oakstone, I3 [Member]
Goodwill [Line Items]
Business acquisition, purchase price allocation, goodwill	68,503
Goodwill [Roll Forward]
Goodwill, ending balance	$ 68,503
RCS
Goodwill [Roll Forward]
Fair Value Inputs, Discount Rate			16.00%
Minimum \| RCS
Goodwill [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate			2.00%
Maximum \| RCS
Goodwill [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate			3.00%