Note 12 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, Net of Tax, beginning balance					$ 37,383
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains arising during the period	9,281		1,480		13,766		8,946
Less: Reclassification adjustment for net gains included in net income	(392)		554		132		575
Net unrealized gains on investments	9,673		926		13,634		8,371
Other comprehensive income	9,673		926		13,634		8,371
Accumulated Other Comprehensive Income, Net of Tax, ending balance	51,017				51,017
Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, before Tax, beginning balance	61,185		36,323		57,345		24,904
Accumulated Other Comprehensive Income, Tax, beginning balance	19,841		12,783		19,962		8,809
Accumulated Other Comprehensive Income, Net of Tax, beginning balance	41,344		23,540		37,383		16,095
Other Comprehensive Income, before Tax [Abstract]
Unrealized holding gains arising during the period, before tax	9,069		2,277		13,718		13,763
Less: Reclassification adjustment for net gains included in net income, before tax	(603)	[1]	1,150	[1]	206	[1]	1,217	[1]
Net unrealized gains on investments, before tax	9,672		1,127		13,512		12,546
Other comprehensive income, before tax	9,672		1,127		13,512		12,546
Other Comprehensive Income, Tax [Abstract]
Unrealized holding gains arising during the period, tax	(212)		797		(48)		4,817
Less: Reclassification adjustment for net gains included in net income, tax	(211)	[1]	596	[1]	74	[1]	642	[1]
Net unrealized gains on investments, tax	(1)		201		(122)		4,175
Other Comprehensive Income, Tax	(1)		201		(122)		4,175
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains arising during the period	9,281		1,480		13,766		8,946
Less: Reclassification adjustment for net gains included in net income	(392)	[1]	554	[1]	132	[1]	575	[1]
Net unrealized gains on investments	9,673		926		13,634		8,371
Other comprehensive income	9,673		926		13,634		8,371
Accumulated Other Comprehensive Income, before Tax, ending balance	70,857		37,450		70,857		37,450
Accumulated Other Comprehensive Income, Tax, ending balance	19,840		12,984		19,840		12,984
Accumulated Other Comprehensive Income, Net of Tax, ending balance	$ 51,017		$ 24,466		$ 51,017		$ 24,466

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