Discontinued Operations (Loss from Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations before taxes	$ (194,965)	$ 0	$ 0
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	188,313	(27,432)	(26,980)
Gain on sale of discontinued operations	67,382	(7,024)	(8,063)
AS&O Business [Member] \| Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	178,020	325,841	311,276
Cost of sales	148,357	286,300	270,656
Gross profit	29,663	39,541	40,620
Selling, general and administrative expenses	8,905	18,500	16,847
Research, development and engineering costs	2,352	6,397	7,102
Other operating expenses (income)(1)	1,805	854	1,324
Interest expense	22,833	42,488	42,939
Other (income) loss, net	420	(1,266)	(612)
Gain on sale of discontinued operations	$ 67,382	$ (7,024)	$ (8,063)

Disposal Group, Including Discontinued Operation, Research, Development, And Engineering Costs

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Disposal Group, Including Discontinued Operation, Selling, General, And Administrative Expenses

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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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.

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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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Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of interest expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of other expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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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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