Note 2 - Stock-Based Compensation (Details) - RSU Summary shares in Thousands	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Note 2 - Stock-Based Compensation (Details) - RSU Summary [Line Items]
Outstanding at January 1, 2015 | shares	4,048
Outstanding at January 1, 2015	$ 26.14
Granted (1) | shares	922	[1]
Granted (1)	$ 48.83	[1]
Performance adjustment (2) | shares	(70)	[2]
Performance adjustment (2)	$ 41.83	[2]
Released | shares	(812)
Released	$ 24.20
Forfeited | shares	(64)
Forfeited	$ 32.54
Outstanding at September 30, 2015 | shares	4,024
Outstanding at September 30, 2015	$ 31.37
Time-Based RSUs [Member]
Note 2 - Stock-Based Compensation (Details) - RSU Summary [Line Items]
Outstanding at January 1, 2015 | shares	589
Outstanding at January 1, 2015	$ 28.48
Granted (1) | shares	263	[1]
Granted (1)	$ 49.59	[1]
Released | shares	(257)
Released	$ 25.58
Forfeited | shares	(40)
Forfeited	$ 35.12
Outstanding at September 30, 2015 | shares	555
Outstanding at September 30, 2015	$ 39.38
PSUs [Member]
Note 2 - Stock-Based Compensation (Details) - RSU Summary [Line Items]
Outstanding at January 1, 2015 | shares	1,659
Outstanding at January 1, 2015	$ 28.11
Granted (1) | shares	659	[1]
Granted (1)	$ 48.53	[1]
Performance adjustment (2) | shares	(70)	[2]
Performance adjustment (2)	$ 41.83	[2]
Released | shares	(555)
Released	$ 23.56
Forfeited | shares	(24)
Forfeited	$ 28.27
Outstanding at September 30, 2015 | shares	1,669
Outstanding at September 30, 2015	$ 37.11
MSUs [Member]
Note 2 - Stock-Based Compensation (Details) - RSU Summary [Line Items]
Outstanding at January 1, 2015 | shares	1,800
Outstanding at January 1, 2015	$ 23.57
Outstanding at September 30, 2015 | shares	1,800
Outstanding at September 30, 2015	$ 23.57

[1] Amount for PSUs reflects the maximum number of shares that can be earned assuming the achievement of the highest level of performance conditions.

[2] Amount for PSUs reflects the number of shares that have not been earned or may not be earned based on management's probability assessment.