Note 2 - Summary of Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]
Balance at December 31, 2014			$ (17,821)
Balance at December 31, 2014			3,445
Balance at December 31, 2014			(14,376)
Total activity in 2015			(4,385)
Total activity in 2015			322
Total activity in 2015	$ 1,814	$ 1,796	(4,063)	$ 971
Balance at June 30, 2015	(22,206)		(22,206)
Balance at June 30, 2015	3,767		3,767
Balance at June 30, 2015	$ (18,439)		(18,439)
Change during 2015:
Before-tax amount			(5,895)
Before-tax amount			532
Before-tax amount			(5,363)
Tax (expense) benefit			1,510
Tax (expense) benefit			(210)
Tax (expense) benefit			$ 1,300