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Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Gross Profit (Loss) by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Gross profit	$ 62,234	$ 56,571	$ 178,894	$ 216,878
Advanced Manufacturing Capital Equipment [Member]
Segment Reporting Information [Line Items]
Gross profit	43,151	34,829	121,647	141,521
Analytical Solutions Group [Member]
Segment Reporting Information [Line Items]
Gross profit	6,758	8,100	21,239	24,485
Europe Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Gross profit	3,427	3,547	10,005	11,292
Asia Region Sales & Service Operations [Member]
Segment Reporting Information [Line Items]
Gross profit	11,580	9,030	31,366	28,143
Corporate, Eliminations and Other [Member]
Segment Reporting Information [Line Items]
Gross profit	$ (2,682)	$ 1,065	$ (5,363)	$ 11,437

X

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ 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 210.5-03.1,2)

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

+ 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