Note 5 - Fair Value (Detail) - Assets Measured at Fair Value on a Recurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Securities Available For Sale	$ 326,673	$ 342,184
Trading equity securities	7	2
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	0	0
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	119,129	133,834
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	0	0
US Government Agencies Debt Securities [Member]
Securities Available For Sale	119,129	133,834
Mortgage-backed Securities, Issued by Private Enterprises [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	0	0
Mortgage-backed Securities, Issued by Private Enterprises [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	67,691	71,052
Mortgage-backed Securities, Issued by Private Enterprises [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	0	0
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Securities Available For Sale	67,691	71,052
Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	0	0
Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	55,487	57,845
Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	0	0
Collateralized Mortgage Obligations [Member]
Securities Available For Sale	55,487	57,845
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	0	0
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	68,556	62,447
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	14,153	15,342
US States and Political Subdivisions Debt Securities [Member]
Securities Available For Sale	82,709	77,789
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	100	92
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	0	0
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	1,557	1,572
Equity Securities, Other [Member]
Securities Available For Sale	1,657	1,664
Fair Value, Inputs, Level 1 [Member]
Securities Available For Sale	100	92
Trading equity securities	7	2
Fair Value, Inputs, Level 2 [Member]
Securities Available For Sale	310,863	325,179
Trading equity securities	0	0
Fair Value, Inputs, Level 3 [Member]
Securities Available For Sale	15,710	16,914
Trading equity securities	$ 0	$ 0

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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