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Note 10 - Financial Instruments (Details) - Fair Value of Company’s Liabilities - Interest Rate Swap [Member] - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Liabilities    
Interest rate swap contracts, current and long-term portion $ 334,716 $ 298,771
Fair Value, Inputs, Level 2 [Member]    
Liabilities    
Interest rate swap contracts, current and long-term portion $ 334,716 $ 298,771