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Note 7 - Receivables (Details) - Receivables (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Receivables [Abstract]    
Gross trade receivables $ 307,557 $ 252,168
Allowance for doubtful accounts (4,934) (4,142)
Net trade receivables 302,623 248,026
Other receivables 28,486 20,503
Total receivables, net $ 331,109 $ 268,529