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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Dec. 31, 2017
Jan. 10, 2017
Income Taxes [Line Items]            
Statutory tax rate 21.00%   21.00%   35.00%  
Effective tax rate on income from operations 20.80% 31.90% 16.00% 11.60%    
Gain on acquisition of business       $ 26,409    
Deferred tax liability write off   $ 1,400   $ 1,400    
Favorable impact on effective tax rate, write off percentage       18.90%    
Additional income tax provision from revaluation of certain deferred tax assets and liabilities at the new tax rate         $ 2,800  
Income tax measurement period under ASU 2018-05     1 year      
Laser Quantum            
Income Taxes [Line Items]            
Percentage of additional shares acquired           35.00%
Canada Revenue Agency | CANADA            
Income Taxes [Line Items]            
Statutory tax rate 29.00% 29.00% 29.00% 29.00%