Derivative and Hedging Activities (Tables)

9 Months Ended

Sep. 28, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments gain and losses by Statement of Operations locations

Gains (losses) on the non-designated derivative instruments recognized during the periods presented were as follows (in thousands):

		Three months ended					Nine months ended
	Financial Statement Location	September 28, 2018			September 29, 2017		September 28, 2018			September 29, 2017
Derivatives not designated as hedging instruments:
Gains (losses) recognized in income	Other expense, net	$	(30	)	$	119	$	(1,412	)	$	(66	)

Schedule of Notional Amounts of Outstanding Derivative Positions

The U.S. dollar equivalents of all outstanding notional amounts of foreign currency forward contracts, including the Euro, British pound, Israeli shekel and Japanese yen, are summarized as follows (in thousands):

	September 28, 2018		December 31, 2017
Derivatives not designated as hedging instruments:
Purchase	$	28,782	$	12,875
Sell	$	—	$	1,509

Schedule of Derivatives Instruments Balance Sheet Location

The locations and fair value amounts of the Company’s derivative instruments reported in its Condensed Consolidated Balance Sheets are as follows (in thousands):

		Asset Derivatives					Derivative Liabilities
	Balance Sheet Location	September 28, 2018		December 31, 2017		Balance Sheet Location	September 28, 2018		December 31, 2017
Derivatives not designated as hedging instruments:
Foreign currency contracts	Prepaid expenses and other current assets	$	5	$	33	Accrued and other current liabilities	$	195	$	4
Total derivatives		$	5	$	33		$	195	$	4

Changes in fair values of non-designated foreign currency forward contracts

As of September 28, 2018, information related to the offsetting arrangements was as follows (in thousands):

	Gross Amounts of Derivatives		Gross Amounts of Derivatives Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Derivatives Presented in the Condensed Consolidated Balance Sheets
Derivative assets	$	5	—	$	5
Derivative liabilities	$	195	—	$	195