Business Acquisitions - Additional Information (Detail)	3 Months Ended		9 Months Ended									12 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 Equitrac Acquisitions USD ($)		Jun. 30, 2011 SVOX Acquisitions USD ($)		Jun. 30, 2011 SVOX Acquisitions EUR (€)	Jun. 30, 2011 Series of Individually Immaterial Business Acquisitions USD ($) Year Entity	Jun. 30, 2011 SpinVox Acquisitions	Sep. 30, 2010 Capitalized Cost USD ($)
Business Acquisition [Line Items]
Date of acquisition					2011-06-15		2011-06-16		2011-06-16		2009-12-30
Business acquisitions, businesses acquired										2
Business Acquisition, purchase Price					$ 161,950,000		$ 123,909,000		€ 87,000,000
Business Acquisition, Cash Paid					161,950,000		80,919,000		57,000,000	82,100,000
Business Acquisition, contingent consideration and deferred payment							42,990,000		30,000,000
Business acquisition, goodwill					87,705,000		92,478,000			42,400,000
Business Acquisition, contingent consideration and deferred payment, current									8,300,000
Business acquisition, identifiable intangible assets					91,900,000	[1]	42,165,000	[1]		34,000,000
Business Acquisition, contingent consideration and deferred payment, non current									21,700,000
Acquired intangible assets, useful life (in years)										11.5
Professional service fees	$ 7,775,000	$ 3,079,000	$ 11,107,000	$ 14,933,000								$ 2,200,000

[1] The following are the identifiable intangible assets acquired and their respective weighted average useful lives, as determined based on preliminary valuations (table in thousands, except for years):