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Accounts Receivable, net - Net Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Receivables [Abstract]    
Trade receivables $ 87,361 $ 77,899
Insurance claims   1,865
Other 1,492 1,633
Accounts receivable, gross 88,853 81,397
Allowance for doubtful accounts (604) (827)
Accounts receivable, net $ 88,249 $ 80,570