Note 15 - Hedging Activities - Effect on Consolidated Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Translated earnings contract (loss) gain, net	$ (448,000)	$ 80,000	$ 1,369,000
Undesignated [Member]
Translated earnings contract (loss) gain, net	(475,000)	85,000	1,411,000
Foreign Exchange Contracts, Balance Sheet [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Translated earnings contract (loss) gain, net	4,000	8,000	29,000
Foreign Exchange Contracts, Loans [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Translated earnings contract (loss) gain, net	(31,000)	(3,000)	13,000
Translated Earnings Contracts [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Translated earnings contract (loss) gain, net	$ (448,000)	$ 80,000	$ 1,369,000