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Segment Reporting Detail 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Sales Information
Total Net Sales	$ 684,253	$ 591,686	$ 578,680	$ 524,353	$ 657,292	$ 578,553	$ 570,283	$ 535,400	$ 2,378,972	$ 2,341,528	$ 2,309,328
Laboratory Product and Service Sales [Member]
Segment Sales Information
Total Net Sales									1,100,632	1,071,299	1,047,319
Industrial Product and Service Sales [Member]
Segment Sales Information
Total Net Sales									1,065,605	1,063,653	1,038,871
Retail Product and Service Sales [Member]
Segment Sales Information
Total Net Sales									$ 212,735	$ 206,576	$ 223,138

X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration