Deferred Revenue (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current deferred revenue	$ 248,908	$ 206,610
Long-term deferred revenue	127,372	108,481
Deferred maintenance revenue
Current deferred revenue	119,738	114,036
Long-term deferred revenue	49,333	43,763
Unearned revenue
Current deferred revenue	129,170	92,574
Long-term deferred revenue	$ 78,039	$ 64,718

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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