Derivative Instruments and Hedging Activities - Fair Value of Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 36,600	$ 8,100
Foreign currency option contracts | Derivatives not designated as hedging instruments: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	0	180
Foreign currency forward contracts | Derivatives not designated as hedging instruments: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	413	0
Foreign currency forward contracts | Derivatives not designated as hedging instruments: | Accrued expenses
Derivative, Fair Value, Net [Abstract]
Derivative Liability	221	43
Cash flow hedge | Derivatives designated as cash flow hedges:
Derivatives, Fair Value [Line Items]
Derivative notional amount	73,700	0
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Other current assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	488	0
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Other assets
Derivative, Fair Value, Net [Abstract]
Derivative Asset	116	0
Cash flow hedge | Foreign currency forward contracts | Derivatives designated as cash flow hedges: | Accrued expenses
Derivative, Fair Value, Net [Abstract]
Derivative Liability	$ 279	$ 0
Maximum | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative term	2 months
Maximum | Cash flow hedge | Derivatives designated as cash flow hedges:
Derivatives, Fair Value [Line Items]
Derivative term	14 months