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Discontinued Operations Discontinued Operations (Cash Flow Information from Discontinued Operations) (Details) - AS&O Business [Member] - Discontinued Operations, Held-for-sale [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash used in operating activities $ (5,465) $ (1,692)
Cash used in investing activities (3,596) (9,141)
Depreciation and amortization 7,450 10,507
Capital expenditures $ 3,610 $ 9,214