Note 11 - Accumulated Other Comprehensive Income Rollforward of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 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	4,485		7,466
Less: Reclassification adjustment for net gains included in net income	524		21
Net unrealized gains on investments	3,961		7,445
Other comprehensive income	3,961		7,445
Accumulated Other Comprehensive Income, Net of Tax, ending balance	41,344
Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income, before Tax, beginning balance	57,345		24,904
Accumulated Other Comprehensive Income, Tax, beginning balance	19,962		8,809
Accumulated Other Comprehensive Income, Net of Tax, beginning balance	37,383		16,095
Other Comprehensive Income, before Tax [Abstract]
Unrealized holding gains arising during the period, before tax	4,649		11,486
Less: Reclassification adjustment for net gains included in net income, before tax	809	[1]	67	[1]
Net unrealized gains on investments, before tax	3,840		11,419
Other comprehensive income, before tax	3,840		11,419
Other Comprehensive Income, Tax [Abstract]
Unrealized holding gains arising during the period, tax	164		4,020
Less: Reclassification adjustment for net gains included in net income, tax	285	[1]	46	[1]
Net unrealized gains on investments, tax	(121)		3,974
Other Comprehensive Income, Tax	(121)		3,974
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding gains arising during the period	4,485		7,466
Less: Reclassification adjustment for net gains included in net income	524	[1]	21	[1]
Net unrealized gains on investments	3,961		7,445
Other comprehensive income	3,961		7,445
Accumulated Other Comprehensive Income, before Tax, ending balance	61,185		36,323
Accumulated Other Comprehensive Income, Tax, ending balance	19,841		12,783
Accumulated Other Comprehensive Income, Net of Tax, ending balance	$ 41,344		$ 23,540

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