Note 11 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, Net of Tax, beginning balance	$ 51,485
Other Comprehensive Income, Net of Tax [Abstract]
Net foreign currency translation adjustments	(126)		0
Unrealized holding gains arising during the period	6,454		2,669
Less: Reclassification adjustment for net (losses) gains included in net income	(33)		4
Net unrealized gains on investments recorded as assets held for sale	1,828		1,296
Other comprehensive income	8,189		3,961
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Continuing Operations	6,487		2,665
Accumulated Other Comprehensive Income, Net of Tax, ending balance	59,674
Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, before Tax, beginning balance	79,208		57,345
Accumulated Other Comprehensive Income, Tax, beginning balance	27,723		19,962
Accumulated Other Comprehensive Income, Net of Tax, beginning balance	51,485		37,383
Other Comprehensive Income, before Tax [Abstract]
Net foreign currency translation adjustments, before tax	(194)
Unrealized holding (losses) gains arising during the period, before tax	9,929		2,670
Less: Reclassification adjustment for net (losses) gains included in net income, before tax	(51)	[1]	5	[1]
Other Comprehensive Income (Loss), Before Tax, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	2,812		1,175
Other comprehensive income, before tax	12,598		3,840
Other Comprehensive Income, Tax [Abstract]
Net foreign currency translation adjustments, tax	(68)
Unrealized holding (losses) gains arising during the period, tax	3,475		1
Less: Reclassification adjustment for net (losses) gains included in net income, tax	(18)	[1]	1	[1]
Other Comprehensive Income (Loss), Tax Effect, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	984		(121)
Other Comprehensive Income, Tax	4,409		(121)
Other Comprehensive Income, Net of Tax [Abstract]
Net foreign currency translation adjustments	(126)
Unrealized holding gains arising during the period	6,454		2,669
Less: Reclassification adjustment for net (losses) gains included in net income	(33)	[1]	4	[1]
Net unrealized gains on investments recorded as assets held for sale	1,828		1,296
Other comprehensive income	8,189		3,961
Other Comprehensive Income (Loss), Before Tax, Unrealized Gains Losses on Investments Continuing Operations	9,980		2,665
Other Comprehensive Income (Loss), Tax Effect, Unrealized Gains (Losses) on Investments Continuing Operations	3,493		0
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Continuing Operations	6,487		2,665
Accumulated Other Comprehensive Income, before Tax, ending balance	91,806		61,185
Accumulated Other Comprehensive Income, Tax, ending balance	32,132		19,841
Accumulated Other Comprehensive Income, Net of Tax, ending balance	$ 59,674		$ 41,344

[1] Included in net gains on investments and other financial instruments on our condensed consolidated statements of operations.