Note 11 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Other Comprehensive Income, Net of Tax [Abstract]
Accumulated Other Comprehensive Income, Net of Tax, beginning balance		$ (18,477)
Unrealized holding gains arising during the period		39,374	$ 6,454
Less: Reclassification adjustment for net losses included in net income		(2,157)	(33)
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Continuing Operations		41,531	6,487
Net foreign currency translation adjustments		(85)	(126)
Activity related to investments recorded as assets held for sale		0	1,828
Net actuarial loss		(178)	0
Other comprehensive income		41,268	8,189
Accumulated Other Comprehensive Income, Net of Tax, ending balance		22,791
Other Comprehensive Income
Other Comprehensive Income, before Tax [Abstract]
Accumulated Other Comprehensive Income, before Tax, beginning balance		(28,425)	79,208
Unrealized holding (losses) gains arising during the period, before tax		60,575	9,929
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	[1]	(3,318)	(51)
Other Comprehensive Income (Loss), Before Tax, Unrealized Gains Losses on Investments Continuing Operations		63,893	9,980
Net foreign currency translation adjustments, before tax		(130)	(194)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax		(274)
Other Comprehensive Income (Loss), Before Tax, Unrealized Holding Gains (Losses) Arising During the Period on Investments Recorded as Assets Held for Sale, Net of Reclassification Adjustments	[2]		2,812
Other comprehensive income, before tax		63,489	12,598
Accumulated Other Comprehensive Income, before Tax, ending balance		35,064	91,806
Other Comprehensive Income, Tax [Abstract]
Accumulated Other Comprehensive Income, Tax, beginning balance		(9,948)	27,723
Unrealized holding (losses) gains arising during the period, tax		21,201	3,475
Less: Reclassification adjustment for net (losses) gains included in net income, tax	[1]	(1,161)	(18)
Other Comprehensive Income (Loss), Tax Effect, Unrealized Gains (Losses) on Investments Continuing Operations		22,362	3,493
Net foreign currency translation adjustments, tax		(45)	(68)
Other Comprehensive Income (Loss), Tax Effect, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	[2]		984
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax		(96)
Other Comprehensive Income, Tax		22,221	4,409
Accumulated Other Comprehensive Income, Tax, ending balance		12,273	32,132
Other Comprehensive Income, Net of Tax [Abstract]
Accumulated Other Comprehensive Income, Net of Tax, beginning balance		(18,477)	51,485
Unrealized holding gains arising during the period		39,374	6,454
Less: Reclassification adjustment for net losses included in net income	[1]	(2,157)	(33)
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Continuing Operations		41,531	6,487
Net foreign currency translation adjustments		(85)	(126)
Activity related to investments recorded as assets held for sale	[2]		1,828
Net actuarial loss		(178)
Other comprehensive income		41,268	8,189
Accumulated Other Comprehensive Income, Net of Tax, ending balance		$ 22,791	$ 59,674

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

[2] Represents the unrealized holding gains (losses) arising during the period on investments recorded as assets held for sale, net of reclassification adjustments for net gains (losses) included in net income from discontinued operations.