Note 2 - Summary of Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Investment Hedge Foreign Exchange Contract [Member]	Mar. 31, 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	1,432
Total activity in 2014			(2,257)
Total activity in 2014	(825)	(4,251)
Balance at March 31, 2014	(5,193)
Balance at March 31, 2014			(1,774)	205	205
Balance at March 31, 2014	(6,762)
Change during 2014:
Before-tax amount	3,279
Before-tax amount			(3,734)
Before-tax amount	(455)
Tax (expense) benefit	(1,847)
Tax (expense) benefit			1,477
Tax (expense) benefit	$ (370)