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Fair Value of Financial Instruments - Liabilities in Level 3 (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Mar. 11, 2016
Oct. 01, 2016
Jan. 02, 2016
Energy Micro      
Fair value liabilities reconciliation of changes      
Gain recognized in earnings   $ (2,700)  
Compensation expense $ 4,600 2,700 $ 1,900
Assets and liabilities measured at fair value on recurring basis | Significant Unobservable Inputs (Level 3) | Contingent consideration      
Fair value liabilities reconciliation of changes      
Balance at the beginning of the period   14,073  
Settlements   (11,375)  
Gain recognized in earnings   (2,698)  
Balance at the end of the period     14,073
Credit Facilities      
Fair value liabilities reconciliation of changes      
Fair value of debt   $ 72,200 $ 77,500