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Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 26, 2016 USD ($) patent
Loss Contingencies [Line Items]
Increase in lease obligations	$ 3.3
Government billing
Loss Contingencies [Line Items]
Reserve for estimated possible loss	$ 1.5
Pending Litigation | Idexx
Loss Contingencies [Line Items]
Number of patents infringed upon | patent	3

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- Definition

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

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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- Definition

Number of another entity's patents that the entity has allegedly infringed.

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