Investments (Tables)

6 Months Ended

Jun. 29, 2013

Investments

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

	2013				2012
	Amortized		Fair		Amortized		Fair
(Thousands of dollars)	Cost		Value		Cost		Value
Money market funds	$	148,983	$	148,983	$	126,537	$	126,537
Corporate bonds	69,724		70,098		67,275		69,214
Enhanced cash mutual fund	25,000		24,978		-		-
U.S. Government agency securities	23,404		23,271		23,647		23,775
Emerging markets debt mutual fund	17,693		17,278		17,693		18,734
U.S. Treasury securities	16,973		16,935		17,165		17,169
Collateralized mortgage obligations	15,359		15,315		15,059		15,162
Asset backed debt securities	11,395		11,423		12,180		12,238
Total available-for-sale short-term investments	328,531		328,281		279,556		282,829
High yield trading debt securities	23,536		24,214		21,839		23,406
Emerging markets trading debt mutual fund	3,120		2,929		3,046		3,237
Emerging markets trading debt securities	1,989		2,034		2,361		2,600
Other trading investments	1,015		1,048		1,262		1,307
Total available-for-sale and trading short-term investments	$	358,191	$	358,506	$	308,064	$	313,379

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)	2013
Due within one year	$	2,128
Due after one year through three years	57,362
Due after three years	51,283
Total fixed rate securities	$	110,773