Note 19 - Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statements of Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net gain (loss)	[1]	$ 1,537	$ (1,597)	$ (4,043)
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Net gain (loss)		71	(561)	(3,919)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Net gain (loss)		$ 1,466	$ (1,036)	$ (124)

[1] Net gains (losses) are recorded as "Net gain (losses) from fair value adjustments" in the Consolidated Statements of Income.