Note 9 - Goodwill and Core Deposit Intangible - Net (Details) (USD $)	12 Months Ended
Dec. 31, 2014
Note 9 - Goodwill and Core Deposit Intangible - Net (Details) [Line Items]
Goodwill	25,717,000us-gaap_Goodwill
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	625,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	625,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	625,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	625,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	625,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4,200,000
Core Deposits [Member] \| Minimum [Member]
Note 9 - Goodwill and Core Deposit Intangible - Net (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years
Core Deposits [Member] \| Maximum [Member]
Note 9 - Goodwill and Core Deposit Intangible - Net (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	13 years
First National Security Company [Member]
Note 9 - Goodwill and Core Deposit Intangible - Net (Details) [Line Items]
Goodwill	25,700,000

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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