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Discontinued Operations - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Aug. 21, 2015
Dec. 27, 2015
Sep. 27, 2015
Sep. 28, 2014
Sep. 27, 2015
Sep. 28, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Income tax expense (benefit) in discontinued operations     $ 26.2 $ 0.0 $ 25.0 $ 0.6
Revolving credit facility            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Repayment of outstanding borrowings     $ 41.0      
7% Senior Notes due 2019 | Senior notes            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Stated interest rate percentage     7.00%   7.00%  
Selling, General and Administrative Expenses            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Depreciation and amortization     $ 0.9 1.6 $ 4.2 5.0
Herley            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Purchase price, in cash $ 260.0          
Escrow to satisfy any purchase price adjustments 2.0          
Gain on sale $ 80.3          
Period to assert claim for indemnification 5 years          
Maximum amount of future payment $ 34.0          
Transaction-related costs 11.3          
Income tax expense (benefit) in discontinued operations 8.9   26.2 $ 0.0 $ 25.0 $ 0.6
Herley | Maximum            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Taxes incurred as part of transaction (up to $5.0 Million) $ 5.0          
Herley | Minimum | 7% Senior Notes due 2019 | Senior notes            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Redemption     $ 175.0      
Scenario, Forecast | Herley            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Working capital adjustments   $ 8.3