For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph g
-Clause 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e6927-128479

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Contingent Acquisition Payments - Additional Information (Detail) (USD $)	9 Months Ended		1 Months Ended		9 Months Ended
	Jun. 30, 2011	Nov. 30, 2007 Vocada Acquisitions	Feb. 28, 2011 Commissure Acquisitions	Sep. 30, 2007 Commissure Acquisitions	Jun. 30, 2011 X-Solutions Group B.V. and eCopy
Business Acquisition, Contingent Consideration [Line Items]
Contingent earn-out payments, Maximum		$ 21,000,000		$ 8,000,000
Payment of contingent consideration upon determination of the final earn-out achievement			1,000,000
Purchase accounting adjustments	$ 4,366,000				$ 5,200,000