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Accounts Receivable, net - Net Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Receivables And Related Allowances [Line Items]    
Trade receivables $ 72,505 $ 87,303
Insurance claims 10,059  
Other 873 1,003
Accounts receivable, gross 83,437 88,306
Allowance for doubtful accounts (636) (955)
Accounts receivable, net $ 82,801 $ 87,351