Note 2 - Summary of Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Abstract]
Balance	$ (17,821)	$ (6,420)
Balance	3,445	483
Balance	(14,376)	(5,937)
Total activity in 2014	(15,895)	(11,401)
Total activity in 2014	4,268	2,962
Total activity in 2014	(11,627)	(8,439)	$ (9,120)
Change during 2014:
Before-tax amount	(22,127)	(16,923)
Before-tax amount	7,060	4,900
Before-tax amount	(15,067)	(12,023)
Tax (expense) benefit	6,232	5,522
Tax (expense) benefit	(2,792)	(1,938)
Tax (expense) benefit	3,440	3,584
Balance	(33,716)	(17,821)	(6,420)
Balance	7,713	3,445	483
Balance	$ (26,003)	$ (14,376)	$ (5,937)