Note 6 - Investments Gain (Loss) on Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Gain (Loss) on Investments [Line Items]
Fixed-maturities held to maturity																	$ (9)		$ 2		$ 37
Fixed-maturities available for sale																	(1,599)		937		2,726
Equities available for sale																	0		349		5,070
Trading securities																	(6,996)		7,997		142,502
Short-term investments																	1		1		7
Other invested assets																	0		8,841		375
Gain (Loss) on Disposition of Other Assets																	246		126		0
Net realized gains (losses) on investments																	(8,357)		18,253		150,717
Unrealized gains (losses) on trading securities																	92,226		(117,198)		(36,435)
Net gains (losses) on investments	$ 18,658	[1]	$ (6,308)	[1]	$ 28,233	[1]	$ 43,286	[1]	$ (2,631)	[1]	$ (6,366)	[1]	$ (86,808)	[1]	$ (3,140)	[1]	$ 83,869	[1]	$ (98,945)	[1]	$ 114,282

[1] The 2014 and 2013 amounts reflect unrealized gains (losses), respectively, on our trading securities.