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Share-based Compensation (Share-based Compensation Recorded in Income Statements) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Total share-based compensation $ 17,729 $ 11,714
Cost of operations
   
Total share-based compensation 2,569 1,595
Sales and marketing
   
Total share-based compensation 8,440 6,141
Systems development and programming
   
Total share-based compensation 1,964 1,231
General and administrative
   
Total share-based compensation $ 4,756 $ 2,747