Deferred Revenue (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Total current deferred revenue	$ 389,032	$ 366,042
Total long-term deferred revenue	482,834	423,929
Deferred maintenance revenue
Total current deferred revenue	161,505	162,958
Total long-term deferred revenue	61,736	60,298
Unearned revenue
Total current deferred revenue	227,527	203,084
Total long-term deferred revenue	$ 421,098	$ 363,631