Investment Securities (Tables)

6 Months Ended

Jun. 27, 2015

Investment Securities [Abstract]

Available For Sale Investments

	June 27, 2015
(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses		Fair Value
Cash equivalents:
Money market funds	$	3,465		—	$	—	$	3,465
Total cash equivalents		3,465		—		—		3,465
Short-term investments:
Corporate bonds and notes		39,970		507		(6)		40,471
US treasury and government agency notes		3,028		106		—		3,134
Foreign government and agency notes		1,509		43		(3)		1,549
US states and municipal securities		230		2		—		232
Total short-term investments		44,737		658		(9)		45,386
Long-term investment securities:
Corporate bonds and notes		79,801		51		(132)		79,720
US treasury and government agency notes		42,356		59		(22)		42,393
Foreign government and agency notes		9,410		2		(17)		9,395
Total long-term investment securities		131,567		112		(171)		131,508
Total	$	179,769	$	770	$	(180)	$	180,359
*Gross unrealized gains include accrued interest on investments of $0.6 million which are included in the Consolidated Statement of Operations.  The remainder of the gross unrealized gains and losses are included in the Consolidated Balance Sheet as Accumulated other comprehensive income (loss).
	December 27, 2014
(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses		Fair Value
Cash equivalents:
Money market funds	$	8,729	$	—	$	—	$	8,729
Total cash equivalents		8,729		—		—		8,729
Short-term investments:
Corporate bonds and notes		43,777		498		(16)		44,259
US treasury and government agency notes		1,010		79		—		1,089
Foreign government and agency notes		501		36		—		537
Total short-term investments		45,288		613		(16)		45,885
Long-term investment securities:
Corporate bonds and notes		61,357		28		(213)		61,172
US treasury and government agency notes		38,650		7		(76)		38,581
Foreign government and agency notes		7,563		1		(39)		7,525
US states and municipal securities		230		1		—		231
Total long-term investment securities		107,800		37		(328)		107,509
Total	$	161,817	$	650	$	(344)	$	162,123
*Gross unrealized gains include accrued interest on investments of $0.6 million which are included in the Consolidated Statement of Operations.  The remainder of the gross unrealized gains and losses are included in the Consolidated Balance Sheet as Accumulated other comprehensive income (loss).