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Note 10 - Long-term Debt (Details) - Future Maturities of Long-Term Debt
$ in Thousands
Sep. 30, 2015
USD ($)
Future Maturities of Long-Term Debt [Abstract]  
Three months ended December 31, 2015 $ 0
Years ended December 31:  
2016 0
2017 0
2018 38,838
2019 0
Thereafter 500,000
Total $ 538,838