Legal Proceedings and Contingencies - Additional Information (Detail)	Dec. 16, 2010 Lawsuits
Claim Against Insurance Carriers to Recover Business Interruption Losses [Member]
Gain Contingencies [Line Items]
Number of suits filed	1

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.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration