Note 4 - Debt and Equity Securities (Details) - Credit Loss Component Recognized in Earnings on Debt Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Credit Loss Component Recognized in Earnings on Debt Securities [Abstract]
Beginning balance	$ 6,193	$ 6,178	$ 3,738	$ 3,738	$ 3,738
Recognition of actual losses	(186)	(674)
OTTI charges due to credit loss recorded in earnings	916	1,419
Ending balance	$ 6,923	$ 6,923	$ 3,738	$ 3,738	$ 3,738

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Other Than Temporary Impairment Credit Losses Recognized In Earnings, Reductions, Recognition Of Actual Losses

+ References

No definition available.

+ Details

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- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563

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- Definition

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8B

-URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563

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