Summary of Significant Accounting Policies and Other Information (Details Textual) - ASU 2016-01 $ in Millions	9 Months Ended
Sep. 29, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ 9.8
Gain recognized on statement of income	$ 0.3

Amount of the cumulative effect on retained earnings net of related income tax effect.

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-Topic 250
-SubTopic 10
-Section 50
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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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