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Changes in Restructuring Liability (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2013 | Jan. 31, 2013
Restructuring Cost and Reserve [Line Items] |  |  |
Liability as of Beginning of period | $ 16,501 | $ 2,770 |
Charge to expense | 4,441 | 20,944 |
Reductions/recoveries |  | (1,008) | [1]
Non-cash items | (411) | (207) |
Reductions for cash payments, net of refund | (6,094) | (8,018) |
Exchange rate fluctuations | 169 | 125 |
Liability as of End of period | 14,606 | 14,606 |
Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Liability as of Beginning of period | 9,238 | 38 |
Charge to expense | 4,441 | 15,765 |
Reductions/recoveries |  | (38) | [1]
Non-cash items | (228) | (328) |
Reductions for cash payments, net of refund | (4,985) | (6,991) |
Exchange rate fluctuations | 138 | 158 |
Liability as of End of period | 8,604 | 8,604 |
Facilities |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Liability as of Beginning of period | 7,263 | 2,732 |
Charge to expense |  | 5,179 |
Reductions/recoveries |  | (970) | [1]
Non-cash items | (183) | 121 |
Reductions for cash payments, net of refund | (1,109) | (1,027) |
Exchange rate fluctuations | 31 | (33) |
Liability as of End of period | $ 6,002 | $ 6,002 |
[1] | During the nine months ended January 31, 2013, the Company recovered $1.0 million from a legal settlement (related to premises) attributable to a previous restructuring action.

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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