Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Revenue and Expenses
Income (loss) from discontinued operations before income tax expense (benefit)	$ 0	$ 0	$ 0	$ (255)
SISD \| Discontinued Operations, Disposed of by Sale
Revenue and Expenses
Operating income from discontinued operations	0	0	0	0
Gain (loss) on sale of discontinued operations	0	0	0	(404)
Income (loss) from discontinued operations before income tax expense (benefit)	0	0	0	(404)
Income tax expense (benefit) on discontinued operations	0	0	0	(149)
Net income (loss) from discontinued operations	$ 0	$ 0	$ 0	$ (255)

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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