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Note 7 - Receivables (Details) - Receivables (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Receivables [Abstract]    
Gross trade receivables $ 293,999 $ 252,168
Allowance for doubtful accounts (4,334) (4,142)
Net trade receivables 289,665 248,026
Other receivables 25,602 20,503
Total receivables, net $ 315,267 $ 268,529