Goodwill and Acquired Intangible Assets (Schedule Of Movements of Goodwill by Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Goodwill [Roll Forward]
Balance, beginning of period	$ 613,394	$ 418,509
Foreign currency translation and other adjustments	(2,097)	(4,386)
Balance, end of period	610,347	613,394
Software Products Segment [Member]
Goodwill [Roll Forward]
Balance, beginning of period	588,443	400,965
Foreign currency translation and other adjustments	(2,024)	(4,351)
Balance, end of period	585,469	588,443
Services Segment [Member]
Goodwill [Roll Forward]
Balance, beginning of period	24,951	17,544
Foreign currency translation and other adjustments	(73)	(35)
Balance, end of period	24,878	24,951
MKS Inc [Member]
Goodwill [Roll Forward]
Acquisitions		189,758
MKS Inc [Member] \| Software Products Segment [Member]
Goodwill [Roll Forward]
Acquisitions		182,758
MKS Inc [Member] \| Services Segment [Member]
Goodwill [Roll Forward]
Acquisitions		7,000
Four C Solutions Inc [Member]
Goodwill [Roll Forward]
Acquisitions	(950)	9,513
Four C Solutions Inc [Member] \| Software Products Segment [Member]
Goodwill [Roll Forward]
Acquisitions	(950)	9,071
Four C Solutions Inc [Member] \| Services Segment [Member]
Goodwill [Roll Forward]
Acquisitions	$ 0	$ 442

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

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-Publisher FASB

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