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Business Acquisitions and Divestiture - Contract Manufacturing, Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 01, 2017	Sep. 30, 2017	Sep. 24, 2016	Feb. 10, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture		$ 10,577	$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CDMO Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from divestiture				$ 75,000
Cash and cash equivalents transferred				600
Working capital adjustments				$ 300
Gain on divestiture	$ 10,600

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- Definition

Disposal Group, Including Discontinued Operations, Working Capital

+ References

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- Definition

Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

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