Note 2 - Summary of Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Investment Hedge Foreign Exchange Contract [Member]	Jun. 30, 2014 Investment Hedge Australian Denominated Debt [Member]	Dec. 31, 2013 Investment Hedge Australian Denominated Debt [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2013			$ (6,625)
Balance at December 31, 2013					483	205	205
Balance at December 31, 2013			(5,937)
Total activity in 2014			5,277
Total activity in 2014					(4,306)
Total activity in 2014	1,796	(5,731)	971	(9,982)
Balance at June 30, 2014	(1,348)		(1,348)
Balance at June 30, 2014					(3,823)	205	205
Balance at June 30, 2014	(4,966)		(4,966)
Change during 2014:
Before-tax amount			8,853
Before-tax amount					(7,123)
Before-tax amount			1,730
Tax (expense) benefit			(3,576)
Tax (expense) benefit					2,817
Tax (expense) benefit			$ (759)