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Note 6 - Investment Securities Available For Sale (Detail) - Amortized Cost and Fair Values of Securities Available for Sale (USD $)	Mar. 31, 2013	Dec. 31, 2012
Available for Sale Securities Amortized Cost	$ 184,224,000	$ 186,305,000
Available for Sale Securities Gross Unrealized Gains	7,100,000	8,427,000
Available for Sale Securities Gross Unrealized Losses	(637,000)	(260,000)
Available for Sale Securities Fair Value	190,687,000	194,472,000
Taxable [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for Sale Securities Amortized Cost	5,892,000	6,888,000
Available for Sale Securities Gross Unrealized Gains	597,000	738,000
Available for Sale Securities Gross Unrealized Losses	0	0
Available for Sale Securities Fair Value	6,489,000	7,626,000
Tax-exempt [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for Sale Securities Amortized Cost	84,379,000	80,391,000
Available for Sale Securities Gross Unrealized Gains	3,985,000	4,683,000
Available for Sale Securities Gross Unrealized Losses	(391,000)	(104,000)
Available for Sale Securities Fair Value	87,973,000	84,970,000
US Government Agencies Debt Securities [Member]
Available for Sale Securities Amortized Cost	25,277,000	24,485,000
Available for Sale Securities Gross Unrealized Gains	556,000	566,000
Available for Sale Securities Gross Unrealized Losses	(81,000)	(91,000)
Available for Sale Securities Fair Value	25,752,000	24,960,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available for Sale Securities Amortized Cost	63,710,000	69,238,000
Available for Sale Securities Gross Unrealized Gains	1,481,000	1,929,000
Available for Sale Securities Gross Unrealized Losses	(165,000)	(65,000)
Available for Sale Securities Fair Value	65,026,000	71,102,000
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Available for Sale Securities Amortized Cost	4,216,000	4,553,000
Available for Sale Securities Gross Unrealized Gains	481,000	511,000
Available for Sale Securities Gross Unrealized Losses	0	0
Available for Sale Securities Fair Value	4,697,000	5,064,000
Debt Securities [Member]
Available for Sale Securities Amortized Cost	183,474,000	185,555,000
Available for Sale Securities Gross Unrealized Gains	7,100,000	8,427,000
Available for Sale Securities Gross Unrealized Losses	(637,000)	(260,000)
Available for Sale Securities Fair Value	189,937,000	193,722,000
Equity Securities in Financial Institutions [Member]
Available for Sale Securities Amortized Cost	750,000	750,000
Available for Sale Securities Gross Unrealized Gains	0	0
Available for Sale Securities Gross Unrealized Losses	0	0
Available for Sale Securities Fair Value	$ 750,000	$ 750,000

X

- Definition

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

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X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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- Definition

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+ References

No definition available.

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