Note 2 - Investments (Detail) - Unrealized Gains and Losses in Investments (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Amortized Cost	$ 320,962	$ 337,779
Unrealized Gains	5,760	4,555
Unrealized Losses	(49)	(150)
Carrying Value	326,673	342,184
US Government Agencies Debt Securities [Member]
Amortized Cost	117,782	132,534
Unrealized Gains	1,347	1,325
Unrealized Losses	0	(25)
Carrying Value	119,129	133,834
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	81,060	76,574
Unrealized Gains	1,679	1,238
Unrealized Losses	(30)	(23)
Carrying Value	82,709	77,789
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Amortized Cost	65,957	70,059
Unrealized Gains	1,735	1,080
Unrealized Losses	(1)	(87)
Carrying Value	67,691	71,052
Collateralized Mortgage Obligations [Member]
Amortized Cost	54,572	57,006
Unrealized Gains	933	854
Unrealized Losses	(18)	(15)
Carrying Value	55,487	57,845
Equity Securities, Other [Member]
Amortized Cost	1,591	1,606
Unrealized Gains	66	58
Unrealized Losses	0	0
Carrying Value	$ 1,657	$ 1,664

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

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+ Details

- 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.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details