Note 10 - Other Comprehensive (Loss) Income (Details) - Changes in Accumulated Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes in Accumulated Other Comprehensive Income [Abstract]
Beginning balance	$ 1,966	$ 343	$ 1,138	$ (3,092)
Other comprehensive (loss) income before reclassifications	(1,638)	3,040	658	7,267
Amounts reclassified from accumulated other comprehensive (loss) income	(49)	(977)	(1,517)	(1,769)
Net other comprehensive (loss) income during the period	(1,687)	2,063	(859)	5,498
Ending balance	$ 279	$ 2,406	$ 279	$ 2,406