Investments (Tables)

3 Months Ended

Mar. 29, 2014

Investments

Summary of the amortized cost and estimated fair value of short-term investments for both available-for-sale and trading securities

	2014				2013
	Amortized		Fair		Amortized		Fair
(Thousands of dollars)	Cost		Value		Cost		Value
Money market funds	$	216,623	$	216,623	$	88,430	$	88,430
Corporate bonds	49,044		49,482		69,591		70,258
U.S. Government agency securities	47,620		47,554		27,299		27,147
Asset backed debt securities	11,949		11,938		8,446		8,477
Collateralized mortgage obligations	6,441		6,451		7,597		7,600
U.S. Treasury securities	2,808		2,770		5,258		5,223
Emerging markets debt mutual fund	-		-		17,693		16,941
Total available-for-sale short-term investments	334,485		334,818		224,314		224,076
High yield trading debt securities	50,696		51,923		49,352		50,428
Emerging markets trading debt mutual fund	3,238		2,856		3,202		2,858
Money market funds held in trading accounts	1,287		1,287		11,033		11,033
Emerging markets trading debt securities	712		729		1,300		1,336
Other trading investments	555		609		841		918
Total available-for-sale and trading short-term investments	$	390,973	$	392,222	$	290,042	$	290,649

Summary of estimated fair value of fixed rate securities designated as available-for-sale, classified by the contractual maturity date of the security

(Thousands of dollars)	2014
Due within one year	$	5,378
Due after one year through three years	44,186
Due after three years	48,331
Total fixed rate securities	$	97,895