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Deferred Revenue (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Sep. 30, 2013
Current deferred revenue $ 301,049 $ 253,753
Long-term deferred revenue 183,205 160,823
Deferred maintenance revenue
   
Current deferred revenue 136,552 134,213
Long-term deferred revenue 58,312 51,784
Unearned revenue
   
Current deferred revenue 164,497 119,540
Long-term deferred revenue $ 124,893 $ 109,039