The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unrecognized tax benefits.

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Summary of Significant Accounting Policies - Goodwill and Intangible Assets, Income Taxes, and Stock-Based Compensation (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 01, 2016	Oct. 01, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Asset Impairment [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0	$ 0	$ 0
Tax-deductible goodwill			5,450	6,352
Impairment of acquired finite-lived intangible assets			0	0	$ 0
Income Taxes
Unrecognized tax liabilities			$ 0	$ 0
Stock Options
Stock-Based Compensation
Stock option life (in years)			10 years