Note 14 - Accumulated Other Comprehensive Income (Loss) (Details) - Reclassifications Out of Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains on available-for-sale marketable securities	$ 14,781		$ 16,162		$ 27,795	$ 31,868
Net of income taxes	1,088		750		100	1,922
Research and development	8,025	[1]	9,183	[1]	16,230	18,334
Sales and marketing	2,947	[2]	2,674	[2]	6,033	5,725
Total, before income taxes	1,065		794		86	1,828
Gains (Losses) Reclassified From OCI into Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains on available-for-sale marketable securities	(5,000)				(65,000)
Net of income taxes	(5,000)				(65,000)
Gains (Losses) Reclassified From OCI into Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net of income taxes					(2,000)
Research and development					(2,000)
Total, before income taxes					(2,000)
Gains (Losses) Reclassified From OCI into Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net of income taxes	2,000				5,000
Research and development	2,000				3,000
Sales and marketing					2,000
Total, before income taxes	2,000				5,000
Gains (Losses) Reclassified From OCI into Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net of income taxes	$ (3,000)				$ (62,000)

[1] Includes equity-based compensation expense in the amount of $657 and $470 for the three months ended June 30, 2014 and 2013, respectively and $1,301 and $938 for the six months ended June 30, 2014 and 2013, respectively.

[2] Includes equity-based compensation expense in the amount of $169 and $133 for the three months ended June 30, 2014 and 2013, respectively and $331 and $268 for the six months ended June 30, 2014 and 2013, respectively.