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Accrued Expenses and Other Current Liabilities
 12 Months Ended
Dec. 31, 2017
Accrued Liabilities [Abstract]  
Accrued Expenses
Accrued Expenses and Other Current Liabilities
 
Year End
 
December 31, 2017
 
January 1, 2017
Accrued compensation and related benefits
$
49,541

 
$
47,214

Accrued taxes
19,924

 
21,571

Other
42,159

 
33,249

 
$
111,624

 
$
102,034