Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands	9 Months Ended
Jun. 30, 2011
Goodwill and Intangible Assets Disclosure [Line Items]
Purchase accounting adjustments	$ 4,366
X-Solutions Group B.V. and eCopy
Goodwill and Intangible Assets Disclosure [Line Items]
Purchase accounting adjustments	5,200
SpinVox Acquisitions
Goodwill and Intangible Assets Disclosure [Line Items]
Purchase accounting adjustments	$ (1,400)

Purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Subparagraph e
-Paragraph 45
-Clause 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration