Fair Value Measurements of Assets and Liabilities (Tables)

3 Months Ended

Mar. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Following are the disclosures related to the fair value of our financial assets and (liabilities) (in thousands):

March 30, 2014	Level 1		Level 2			Level 3		Total
Available for sale marketable securities:
U.S. Government-backed securities	$	15,092	$	—		$	—	$	15,092
Agency bonds	—		52,967			—		52,967
Commercial paper	—		34,989			—		34,989
Certificates of deposit	—		8,578			—		8,578
Municipal bonds	—		51,601			—		51,601
Corporate bonds	—		12,091			—		12,091
Trading securities:
Equity securities – mutual funds	6,254		—			—		6,254
Derivative contracts, net	—		(2,936		)	—		(2,936		)
Total	$	21,346	$	157,290		$	—	$	178,636

December 31, 2013	Level 1		Level 2			Level 3		Total
Available for sale marketable securities:
U.S. treasury notes	$	10,128	$	—		$	—	$	10,128
Agency bonds	—		37,961			—		37,961
Commercial paper	—		39,987			—		39,987
Certificates of deposit	—		7,786			—		7,786
Municipal bonds	—		49,319			—		49,319
Corporate bonds	—		5,001			—		5,001
Trading securities:
Equity securities – mutual funds	5,287		—			—		5,287
Derivative contracts, net	—		(1,113		)	—		(1,113		)
Total	$	15,415	$	138,941		$	—	$	154,356