Fair Value Measurements (Tables)

3 Months Ended

Mar. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured On Recurring Basis

	As of December 31, 2013
	Total		Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents—money-market funds	$	31,295	$	31,295	$	—	$	—
Available-for-sale securities—Treasuries (1)	104,601		104,601		—		—
Available-for-sale securities-Certificates of Deposit (1)	159		159		—		—
Trading securities - Mutual Funds (1)	385		385		—		—
Foreign currency forward contracts (2)	905		—		905		—
Total assets measured at fair value	$	137,345	$	136,440	$	905	$	—

(1) Included in short-term investments on the Company’s unaudited condensed consolidated balance sheet.

(2) Included in prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheet.

	As of March 30, 2014
	Total		Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents—money-market funds	$	9,099	$	9,099	$	—	$	—
Available-for-sale securities—U.S. Treasuries (1)	109,959		109,959		—		—
Available-for-sale securities—Certificates of Deposit (1)	174		174		—		—
Trading securities- Mutual Funds (1)	472		472		—		—
Foreign currency forward contracts (2)	261		—		261		—
Total assets measured at fair value	$	119,965	$	119,704	$	261	$	—

(1) Included in short-term investments on the Company’s unaudited condensed consolidated balance sheet.

(2) Included in prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheet.

Fair Value, Liabilities Measured On Recurring Basis

	As of December 31, 2013
	Total			Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)			Significant unobservable inputs (Level 3)
Foreign currency forward contracts (3)	$	(381	)	$	—	$	(381	)	$	—
Total liabilities measured at fair value	$	(381	)	$	—	$	(381	)	$	—

(3) Included in other accrued liabilities on the Company’s unaudited condensed consolidated balance sheet.

	As of March 30, 2014
	Total			Quoted market prices in active markets (Level 1)		Significant other observable inputs (Level 2)			Significant unobservable inputs (Level 3)
Foreign currency forward contracts (3)	$	(1,192	)	$	—	$	(1,192	)	$	—
Total liabilities measured at fair value	$	(1,192	)	$	—	$	(1,192	)	$	—

(3) Included in other accrued liabilities on the Company’s unaudited condensed consolidated balance sheet.