Expenses by Business Segment for Restructuring Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Sep. 30, 2012	Jun. 30, 2012
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions	$ 5,203
Restructuring charges, provisions	(4,984)	2,821
Cash paid	(1,846)	(123)
Reversals	(219)
Restructuring liability at end period	5,836	2,698
Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions	5,203
Restructuring charges, provisions		2,515
Cash paid	(1,756)	(2)
Reversals	(219)
Restructuring liability at end period	5,741	2,513
Facilities And Other
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		306
Cash paid	(90)	(121)
Restructuring liability at end period	95	185
ACS
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions	5,203
Restructuring charges, provisions		2,712
ACS \| Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions	5,203
Restructuring charges, provisions		2,406
ACS \| Facilities And Other
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		306
MFS
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		109
MFS \| Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		$ 109

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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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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