Note 7 - Derivative Instruments, Effect of Derivative Contracts on Accumulated Other Comprehensive Income (Details) (Foreign Exchange Contract [Member], Cash Flow Hedging [Member], Designated as Hedging Instrument [Member], USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Effect of Derivative Contracts on Accumulated Other Comprehensive Income:
Accumulated OCI - Foreign exchange contracts designated as cash flow hedges, beginning of period	$ 13,560	$ (4,821)
Amount of gain (loss) recognized in other comprehensive income (effective portion)	29,647	(10,268)
Amount of gain (loss) reclassified from accumulated other comprehensive income to income (effective portion)	6,958	14,225
Accumulated OCI - Foreign exchange contracts designated as cash flow hedges, end of period	$ 36,249	$ (864)