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Legal Proceedings - Additional Information (Detail) $ in Thousands	May 31, 2012 USD ($) Case Person Plaintiff
U.S. State District Court Abad Castillo And Marquinez
Loss Contingencies [Line Items]
Number of Lawsuits Filed	2
Number of claimants | Person	2,700
U.S. State District Court Abad Castillo | Hendler Law Firm
Loss Contingencies [Line Items]
Number of plaintiffs required to be dismissed | Plaintiff	22
Number of plaintiffs dismissed	14
Superior Court Abad Castillo And Marquinez
Loss Contingencies [Line Items]
Number of Lawsuits appealed	57
United States Lawsuits
Loss Contingencies [Line Items]
Legal costs and fees | $	$ 2,350

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- Definition

Loss contingency appeal for dismiss number.

+ References

No definition available.

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- Definition

Number of lawsuits appealed.

+ References

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+ Details

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- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Number of claims dismissed.

+ References

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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- Definition

Number of defendants named in a legal action.

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