Note 6 - Investments Gain (Loss) on Investments (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
Gain (Loss) on Investments [Line Items]
Gain (Loss) on Disposition of Other Assets	$ 531	$ 70	$ 478	$ 93
Realized Gain (Loss) on Marketable Securities and Cost Method Investments, Excluding Other than Temporary Impairments, and Other Investments	109	3,194	(4,199)	25,811
Unrealized (losses) gains on trading securities	(7,663)	(12,666)	107,865	(169,107)
Unrealized (losses) gains on other invested assets	(285)	2,340	165	405
Total (losses) gains on investments	(7,839)	(7,132)	103,831	(142,891)
Fixed Maturities [Member]
Gain (Loss) on Investments [Line Items]
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments	0	0	(9)	2
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	(541)	443	(335)	1,312
Equity securities
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	0	0	0	349
Trading Securities [Member]
Gain (Loss) on Investments [Line Items]
Trading Securities, Realized Gain (Loss)	119	2,196	(4,333)	15,212
Short-term Investments [Member]
Gain (Loss) on Investments [Line Items]
Gain (Loss) on Sale of Securities, Net	0	0	0	2
Other investments
Gain (Loss) on Investments [Line Items]
Cost-method Investments, Realized Gain (Loss), Excluding Other than Temporary Impairments	$ 0	$ 485	$ 0	$ 8,841