Segment Information (Tables)

6 Months Ended

Jun. 28, 2015

Segment Reporting [Abstract]

Schedule of Sales to External Customers and Gross Profit by Segment

The following tables summarize various financial amounts for each of our business segments (in thousands):

	Thirteen Weeks Ended				Twenty-Six Weeks Ended
	June 28, 2015		June 29, 2014		June 28, 2015		June 29, 2014
Sales to External Customers:
Industry Group	$	119,580	$	127,225	$	231,480	$	233,664
Science Group	104,609		109,730		213,525		229,556
Total	$	224,189	$	236,955	$	445,005	$	463,220
Gross Profit:
Industry Group	$	64,747	$	64,088	$	121,357	$	120,221
Science Group	47,358		45,763		96,019		95,955
Total	$	112,105	$	109,851	$	217,376	$	216,176

Schedule of Goodwill and Total Assets by Segment

	June 28, 2015		December 31, 2014
Goodwill:
Industry Group	$	78,695	$	76,858
Science Group	89,241		93,915
Total	$	167,936	$	170,773
Total Assets:
Industry Group	$	472,350	$	444,168
Science Group	407,726		470,899
Corporate and Eliminations	520,327		502,751
Total	$	1,400,403	$	1,417,818