Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jan. 12, 2015	Jun. 30, 2015	Sep. 30, 2014
Intangible assets
Goodwill		$ 818,952	$ 779,928
TONBELLER
Consideration
Cash	$ 59,632
Recognized amounts of identifiable assets acquired and liabilities assumed
Cash and cash equivalents	2,640
Accounts receivable, net	5,389
Prepaid expenses and other current assets	209
Intangible assets
Other assets	112
Accounts payable	(1,118)
Accrued compensation and employee benefits	(1,506)
Other accrued liabilities	(2,838)
Deferred income taxes	(4,349)
Total identifiable net assets	13,439
Goodwill	46,193
Total	59,632
TONBELLER | Restructuring and acquisition-related expense
Consideration
Acquisition-related costs	763
TONBELLER | Completed technology
Intangible assets
Intangible assets:	2,700
TONBELLER | Customer relationships
Intangible assets
Intangible assets:	11,600
TONBELLER | Trade names
Intangible assets
Intangible assets:	$ 600