Note 8 - Acquisition of Community National Bancorporation and Community National Bank (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets	$ 2,143,990,652	$ 2,093,730,492
Loans Receivable, Net	1,271,026,049	1,267,462,435
Deposits	1,420,493,258	1,374,114,100
Subsequent Event [Member] \| Community National Bancorporation and Community National Bank [Member]
Assets		287,700,000
Loans Receivable, Net		205,200,000
Deposits		247,800,000
Stockholders' Equity Attributable to Parent		$ 19,300,000
Subsequent Event [Member] \| Paid in Stock [Member] \| Community National Bancorporation and Community National Bank [Member]
Business Acquisition Percentage of Consideration		70.00%
Subsequent Event [Member] \| Paid in Cash [Member] \| Community National Bancorporation and Community National Bank [Member]
Business Acquisition Percentage of Consideration		30.00%
Subsequent Event [Member] \| Community National Bancorporation and Community National Bank [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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