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Note 7 - Deferred Compensation and Long-term Incentive Plans (Details) - Compensation Expense (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Compensation Expense [Abstract]        
Compensation expense $ 357 $ 299 $ 1,042 $ 876