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Acquisitions and Divestitures - Narrative - Divestiture (Details) - USD ($)				6 Months Ended
	Sep. 29, 2016	Sep. 21, 2016	Apr. 11, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds related to recent or pending divestitures		$ 50,000,000		$ 0	$ 9,250,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase consideration for recent or pending divestitures	$ 11,700,000		$ 11,000,000
Proceeds related to recent or pending divestitures	11,300,000		9,000,000
Liabilities settled	400,000
Receivables	$ 2,100,000
Gain recognized during the period				$ 45,000
Certain Transition Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables			$ 1,000,000
Contingent consideration payout period			2 years
Satisfaction Of Certain Conditions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables			$ 1,000,000
Purchase Of Module Product Inventory
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables			3,800,000
Purchase Of Module Product Inventory - Certain Transition Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables			$ 1,000,000
Contingent consideration payout period			2 years

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Publisher FASB
-Name Accounting Standards Codification
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