Investments (Tables)

3 Months Ended

Apr. 04, 2015

Investments

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

	2015				2014
	Amortized		Fair		Amortized		Fair
(Thousands of dollars)	Cost		Value		Cost		Value
Money market funds	$	236,974	$	236,974	$	142,432	$	142,432
Corporate bonds	11,652		11,757		11,000		11,015
U.S. Government agency securities	9,287		9,354		9,684		9,666
Asset backed debt securities	2,521		2,554		2,260		2,291
U.S. Treasury securities	1,990		1,996		523		522
Collateralized mortgage obligations	819		816		1,150		1,170
Total available-for-sale short-term investments	263,243		263,451		167,049		167,096
High yield trading debt securities	178,466		175,390		187,491		181,483
Equity mutual fund	86,309		86,268		83,809		82,542
Domestic equity ETF	59,157		61,806		31,307		32,651
Money market funds held in trading accounts	6,362		6,362		21,401		21,401
Emerging markets trading debt mutual fund	3,323		2,550		3,323		2,614
Other trading investments	1,870		1,792		2,850		2,779
Total trading short-term investments	335,487		334,168		330,181		323,470
Total short-term investments	$	598,730	$	597,619	$	497,230	$	490,566

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)	2015
Due within one year	$	984
Due after one year through three years	11,077
Due after three years	12,093
Total fixed rate securities	$	24,154