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Note 4 - Receivables and Inventories (Detail) - Receivables (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Gross trade receivables $ 330,936 $ 307,276
Allowance for doubtful accounts (4,253) (4,078)
Net trade receivables 326,683 303,198
Other receivables 17,167 20,241
Total receivables, net $ 343,850 $ 323,439