Subsequent Events (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended				0 Months Ended	3 Months Ended	12 Months Ended				0 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Restricted Stock Units [Member]	Oct. 02, 2012 Servigistics [Member] Subsequent Event [Member] employees	Dec. 29, 2012 Scenario, Forecast [Member] Servigistics [Member] Subsequent Event [Member]	Sep. 30, 2012 Performance-based Award [Member] Restricted Stock Units [Member]		Sep. 30, 2012 Time-based Award [Member] Restricted Stock Units [Member] installment		Nov. 05, 2012 Time-based Award [Member] Subsequent Event [Member] Restricted Stock Units [Member] installment	Nov. 05, 2012 Later Of November 15, 2013 Or Date Determined By Compensation Committee November 15, 2014 And November 15, 2015 [Member] Performance-based Award [Member] Subsequent Event [Member] Restricted Stock Units [Member]	Nov. 05, 2012 Later of November 15 or Date Determined By Compensation Committee, in each of 2013, 2014 and 2015 [Member] Performance-based Award [Member] Subsequent Event [Member] Restricted Stock Units [Member] installment
Subsequent Event [Line Items]
Annualized revenues of acquiree								$ 80,000,000
Number of employees added by acquisition								400
Purchase price								220,000,000
Credit facility, additional borrowings	230,000,000							230,000,000
Restructuring charges		$ 4,100,000	$ 20,800,000	$ 24,928,000	$ 0	$ 0			$ 16,000,000
Shares granted							2,786,000			780,000	[1]	2,006,000	[2]		100,373	307,683
Number of equal annual installments												3		3		3

[1] Of these performance-based RSUs, 11,899 will be eligible to vest on the later of November 15, 2012 and the date the Compensation Committee determines the extent to which the performance criteria have been achieved and 417,508 will be eligible to vest in three substantially equal installments on the later of November 15, 2012 and the date the Compensation Committee determines the extent to which performance criteria have been achieved, November 15, 2013 and November 15, 2014; and 309,976 are eligible to vest in two substantially equal installments on the later of each of November 15, 2013 and November 15, 2014 and the date the Compensation Committee determines the extent to which the applicable performance criteria have been achieved (RSUs not earned for 2013 may be earned for 2014 to the extent the cumulative performance criteria are achieved). The remaining 40,698 have been forfeited.

[2] The time-based RSUs were issued to employees, including some of our executive officers. These time-based RSUs will vest in three substantially equal annual installments from the date of grant.