Note 11 - Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss), before Tax [Abstract] [Abstract]
Accumulated Other Comprehensive Income, Before Tax	$ 24,904		$ 12,039
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(29)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, before Tax	0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(29)		0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	11,515		26,483
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	67	[1]	14,785	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	11,448		11,698
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	11,419		11,698
Accumulated Other Comprehensive Income, Before Tax	36,323		23,737
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated Other Comprehensive Income, Tax	8,809		639
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	(10)		0
Other Comprehensive Income (Loss), Foreign Currency Translation Reclassification Adjustment Realized upon Sale or Liquidation, Tax	0		0
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(10)		0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	4,030		9,269
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	46	[1]	5,175	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	3,984		4,094
Other Comprehensive Income (Loss), Tax	3,974		4,094
Accumulated Other Comprehensive Income, Tax	12,783		4,733
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax	16,095		11,400
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(19)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(19)		0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	7,485		17,214
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	21	[1]	9,610	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	7,464		7,604
Other Comprehensive Income (Loss), Net of Tax	7,445		7,604
Accumulated other comprehensive income, net of tax	$ 23,540		$ 19,004

[1] Included in net (losses) gains on investments on our condensed consolidated statements of operations.