Fair Value Measurements (Tables)

3 Months Ended

Mar. 29, 2014

Fair Value Measurements

Schedule of financial assets and liabilities measured at fair value

	Estimated Fair Value March 29, 2014
	Total			Input Levels Used
	Fair Value			Level 1		Level 2			Level 3
Cash and cash equivalents	$	51,179		$	51,179	$	—		$	—
Available for sale securities	138,225			—		138,225			—
Foreign currency forward contracts	(1,613		)	—		(1,613		)	—
Commodity futures contracts	388			388		—			—
Trading securities	63,412			63,412		—			—
Total assets measured at fair value	$	251,591		$	114,979	$	136,612		$	—

	Estimated Fair Value December 31, 2013
	Total			Input Levels Used
	Fair Value			Level 1			Level 2			Level 3
Cash and cash equivalents	$	88,283		$	88,283		$	—		$	—
Available for sale securities	118,647			—			118,647			—
Foreign currency forward contracts	(684		)	—			(684		)	—
Commodity futures contracts, net	(130		)	(130		)	—			—
Trading securities	63,215			63,215			—			—
Total assets measured at fair value	$	269,331		$	151,368		$	117,963		$	—

	Estimated Fair Value March 30, 2013
	Total			Input Levels Used
	Fair Value			Level 1			Level 2			Level 3
Cash and cash equivalents	$	50,887		$	50,887		$	—		$	—
Auction rate security	8,808			—			—			8,808
Available for sale securities excluding the auction rate security	116,771			—			116,771			—
Foreign currency forward contracts	(247		)	—			(247		)	—
Commodity futures contracts	(449		)	(449		)	—			—
Trading securities	54,377			54,377			—			—
Total assets measured at fair value	$	230,147		$	104,815		$	116,524		$	8,808