Note 14 - Other Comprehensive Income (Loss) (Details) - Comprehensive Income (Loss) Components - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Comprehensive Income (Loss) Components [Abstract]
Balance	$ (1,409)	$ (2,552)	$ 2,059
Balance	(30,622)	(23,747)	(25,977)
Balance	(32,031)	(26,299)	(23,918)
Change	250	1,143	(4,611)
Change	(850)	(6,875)	2,230
Change	(600)	(5,732)	(2,381)
Balance	(1,159)	(1,409)	(2,552)
Balance	(31,472)	(30,622)	(23,747)
Balance	$ (32,631)	$ (32,031)	$ (26,299)