Note 6 - Investment Securities (Details) (USD $)	6 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Note 6 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ 4,300,000	$ 12,900,000
Percentage Decrease in Securities With Gross Unrealized Losses	66.40%
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4,273,000	3,609,000
Available-for-sale Securities	616,256,000	612,820,000
AFS Gross Unrealized Losses [Member]
Note 6 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes	8,600,000
Single Issuer Corporate Debt Security [Member]
Note 6 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	478,000
Available-for-sale Securities	$ 5,400,000

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+ References

No definition available.

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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-Publisher FASB

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-Topic 320

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This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.

+ References

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

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