Share-based Compensation (Share-based Compensation Resulting from Equity Awards Recorded in Income Statements) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Total share-based compensation	$ 6,151	$ 5,610	$ 24,854	$ 12,975
Cost of Operations [Member]
Total share-based compensation	621	692	1,955	1,773
Sales and Marketing [Member]
Total share-based compensation	3,046	2,916	13,582	6,409
Systems Development and Programming [Member]
Total share-based compensation	1,091	637	4,267	1,713
General and Administrative [Member]
Total share-based compensation	$ 1,393	$ 1,365	$ 5,050	$ 3,080