Note 12 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 37,383
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net foreign currency translation adjustments	(226)		0		(7)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	13,650		19,149		12,266
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	(1,039)		656		6,918
Net unrealized gains on investments	14,689		18,493		5,348
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	(302)		2,597		(488)
Other comprehensive income	14,161		21,090		4,853
Accumulated Other Comprehensive Income (Loss), Net of Tax	51,485		37,383
Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax	57,345		24,904		12,039
Accumulated Other Comprehensive Income, Tax (Benefit)	19,962		8,809		639
Accumulated Other Comprehensive Income (Loss), Net of Tax	37,383		16,095		11,400
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(326)				(11)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	21,204		29,460		18,870
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	(1,599)	[1]	1,285	[1]	7,796	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	22,803		28,175		11,074
Other Comprehensive Income (Loss), Before Tax, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	(329)		3,961		2,045
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	22,148		32,136		13,108
Net actuarial gain (loss), before Tax	(285)		305		(243)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(100)				(4)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	7,554		10,311		6,604
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	(560)	[1]	629	[1]	878	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	8,114		9,682		5,726
Other Comprehensive Income (Loss), Tax Effect, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	(27)		1,364		2,533
Other Comprehensive Income (Loss), Tax	7,987		11,046		8,255
Net actuarial gain (loss), Tax	(226)		107		(85)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net foreign currency translation adjustments	(226)				(7)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	13,650		19,149		12,266
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	(1,039)	[1]	656	[1]	6,918	[1]
Net unrealized gains on investments	14,689		18,493		5,348
Other Comprehensive Income (Loss), Net of Tax, Unrealized Gains (Losses) on Investments Recorded as Assets Held for Sale	(302)		2,597		(488)
Other comprehensive income	14,161		21,090		4,853
Net actuarial gain (loss)	(59)		198		(158)
Accumulated Other Comprehensive Income (Loss), before Tax	79,208		57,345		24,904
Accumulated Other Comprehensive Income, Tax (Benefit)	27,723		19,962		8,809
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 51,485		$ 37,383		$ 16,095

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