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Note 3 - Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
2015
U.S. Government agency debt obligations	$	146,660,000	$	1,932,000	$	(1,552,000	)	$	147,040,000
Mortgage-backed securities		66,670,000		708,000		(304,000	)		67,074,000
Municipal general obligation bonds		120,679,000		1,549,000		(205,000	)		122,023,000
Municipal revenue bonds		8,841,000		76,000		(3,000	)		8,914,000
Other investments		1,946,000		0		(5,000	)		1,941,000
	$	344,796,000	$	4,265,000	$	(2,069,000	)	$	346,992,000
2014
U.S. Government agency debt obligations	$	194,894,000	$	1,612,000	$	(3,038,000	)	$	193,468,000
Mortgage-backed securities		92,656,000		1,123,000		(218,000	)		93,561,000
Municipal general obligation bonds		132,347,000		1,042,000		(307,000	)		133,082,000
Municipal revenue bonds		10,769,000		117,000		(13,000	)		10,873,000
Other investments		1,925,000		3,000		0			1,928,000
	$	432,591,000	$	3,897,000	$	(3,576,000	)	$	432,912,000

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 Months				12 Months or More				Total
Description of Securities	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
2015
U.S. Government agency debt obligations	$	0	$	0	$	76,496,000	$	1,552,000	$	76,496,000	$	1,552,000
Mortgage-backed securities		18,025,000		69,000		34,660,000		235,000		52,685,000		304,000
Municipal general obligation bonds		1,981,000		4,000		30,134,000		201,000		32,115,000		205,000
Municipal revenue bonds		0		0		1,134,000		3,000		1,134,000		3,000
Other investments		1,446,000		5,000		0		0		1,446,000		5,000
	$	21,452,000	$	78,000	$	142,424,000	$	1,991,000	$	163,876,000	$	2,069,000
2014
U.S. Government agency debt obligations	$	81,891,000	$	202,000	$	74,120,000	$	2,836,000	$	156,011,000	$	3,038,000
Mortgage-backed securities		49,940,000		218,000		0		0		49,940,000		218,000
Municipal general obligation bonds		54,104,000		307,000		0		0		54,104,000		307,000
Municipal revenue bonds		4,644,000		13,000		0		0		4,644,000		13,000
Other investments		0		0		0		0		0		0
	$	190,579,000	$	740,000	$	74,120,000	$	2,836,000	$	264,699,000	$	3,576,000

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted Average Yield		Amortized Cost		Fair Value
Due in one year or less		0.89%	$	40,382,000	$	40,399,000
Due from one to five years		1.67		110,364,000		110,552,000
Due from five to ten years		3.09		54,022,000		54,868,000
Due after ten years		3.55		71,412,000		72,158,000
Mortgage-backed securities		1.75		66,670,000		67,074,000
Other investments		2.51		1,946,000		1,941,000
		2.22%	$	344,796,000	$	346,992,000

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details