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Commitments and Contingencies (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 26, 2015 USD ($)	Sep. 26, 2015 USD ($)
Loss Contingencies [Line Items]
Increase in lease obligations		$ 17.9
Government billing
Loss Contingencies [Line Items]
Reserve for estimated possible loss	$ 1.5	$ 1.5
Pending Litigation | Idexx
Loss Contingencies [Line Items]
Number of patents infringed upon	3
Inestimable loss	we intend to defend against this proceeding vigorously and therefore an estimate of the possible loss or range of loss cannot be made

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- Definition

Operating Leases, Future Minimum Payments, Due in Next Five Years, Increase

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 450



-SubTopic 20



-Section 50



-Paragraph 4



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