Note 6 - Comprehensive Income (Details) - Components of Accumulated Other Comprehensive Income (USD $)	3 Months Ended		3 Months Ended	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized net holding losses on available-for-sale securities				$ (1,733,000)	$ (4,281,000)
Unrealized losses on available-for-sale securities for which a portion of an other-than-temporary impairment loss has been recognized in earnings				(762,000)	(889,000)
Accumulated other comprehensive loss	(2,495,000)		(5,170,000)
Tax effect	(697,000)	(733,000)		849,000	1,758,000
Accumulated other comprehensive loss, net of tax	$ (1,646,000)		$ (3,412,000)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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