Note 12 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, Net of Tax, beginning balance					$ 37,383
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized foreign currency translation adjustment, before reclassification	(186)		0		(186)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0		0		0		0
Net foreign currency translation adjustments	(186)		0		(186)		0
Unrealized holding (losses) gains arising during the period	(2,236)		4,978		11,530		13,924
Less: Reclassification adjustment for net (losses) gains included in net income	(419)		304		(287)		879
Net unrealized (losses) gains on investments	(1,817)		4,674		11,817		13,045
Other comprehensive income	(2,003)		4,674		11,631		13,045
Accumulated Other Comprehensive Income, Net of Tax, ending balance	49,014				49,014
Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, before Tax, beginning balance	70,857		37,450		57,345		24,904
Accumulated Other Comprehensive Income, Tax, beginning balance	19,840		12,984		19,962		8,809
Accumulated Other Comprehensive Income, Net of Tax, beginning balance	51,017		24,466		37,383		16,095
Other Comprehensive Income, before Tax [Abstract]
Unrealized foreign currency translation adjustment, before Reclassification and Tax	(186)				(186)
Less: Reclassification adjustment, foreign currency translation adjustments, before Tax	0				0
Net foreign currency translation adjustments, before tax	(186)				(186)
Unrealized holding (losses) gains arising during the period, before tax	(2,281)		7,659		11,437		21,422
Less: Reclassification adjustment for net (losses) gains included in net income, before tax	(541)	[1]	444	[1]	(335)	[1]	1,661	[1]
Net unrealized (losses) gains on investments, before tax	(1,740)		7,215		11,772		19,761
Other comprehensive income, before tax	(1,926)		7,215		11,586		19,761
Other Comprehensive Income, Tax [Abstract]
Unrealized foreign currency translation adjustment, before reclassification, tax	0				0
Less: Reclassification adjustment, foreign currency translation adjustments, tax	0				0
Net foreign currency translation adjustments, tax	0				0
Unrealized holding (losses) gains arising during the period, tax	(45)		2,681		(93)		7,498
Less: Reclassification adjustment for net (losses) gains included in net income, tax	(122)	[1]	140	[1]	(48)	[1]	782	[1]
Net unrealized gains (losses) on investments, tax	77		2,541		(45)		6,716
Other Comprehensive Income, Tax	77		2,541		(45)		6,716
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized foreign currency translation adjustment, before reclassification	(186)				(186)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0				0
Net foreign currency translation adjustments	(186)				(186)
Unrealized holding (losses) gains arising during the period	(2,236)		4,978		11,530		13,924
Less: Reclassification adjustment for net (losses) gains included in net income	(419)	[1]	304	[1]	(287)	[1]	879	[1]
Net unrealized (losses) gains on investments	(1,817)		4,674		11,817		13,045
Other comprehensive income	(2,003)		4,674		11,631		13,045
Accumulated Other Comprehensive Income, before Tax, ending balance	68,931		44,665		68,931		44,665
Accumulated Other Comprehensive Income, Tax, ending balance	19,917		15,525		19,917		15,525
Accumulated Other Comprehensive Income, Net of Tax, ending balance	$ 49,014		$ 29,140		$ 49,014		$ 29,140

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