Summary Of Accrued Restructuring Obligations And Related Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Accrued restructuring obligations, beginning balance		$ 31,807	$ 40,527	$ 40,527
Cash paid		(17,312)		(18,260)
Total charge to operating expense	13,396		10,704	10,704
Asset impairment applied to asset balances				(3,268)
Reclassification from deferred rent obligations				2,104
Accrued restructuring obligations, ending balance		14,495		31,807
Facility Closing
Restructuring Cost and Reserve [Line Items]
Accrued restructuring obligations, beginning balance		31,807	40,527	40,527
Cash paid		(17,312)		(18,260)
Total charge to operating expense				7,436
Reclassification from deferred rent obligations				2,104
Accrued restructuring obligations, ending balance		14,495		31,807
Asset Impairment
Restructuring Cost and Reserve [Line Items]
Total charge to operating expense				3,268
Asset impairment applied to asset balances				$ (3,268)

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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ARIBA INC 10-Q