Annual report pursuant to Section 13 and 15(d)

Reconciliation of Insurance Receivables (Detail)

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Reconciliation of Insurance Receivables (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Business Interruption Loss [Line Items]  
Beginning Balance $ 715
Costs approved under our insurance policies, net 2,221
Payments received, net (2,936)
Ending Balance