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Note 2 - Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
September 30, 2015
U.S. Government agency debt obligations	$	159,411,000	$	1,939,000	$	(1,957,000	)	$	159,393,000
Mortgage-backed securities		72,211,000		904,000		(151,000	)		72,964,000
Municipal general obligation bonds		122,724,000		1,118,000		(234,000	)		123,608,000
Municipal revenue bonds		9,163,000		88,000		(1,000	)		9,250,000
Other investments		1,947,000		11,000		0			1,958,000

	$	365,456,000	$	4,060,000	$	(2,343,000	)	$	367,173,000

December 31, 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
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
September 30, 2015
U.S. Government agency debt obligations	$	0	$	0	$	70,896,000	$	1,957,000	$	70,896,000	$	1,957,000
Mortgage-backed securities		6,831,000		37,000		19,943,000		114,000		26,774,000		151,000
Municipal general obligation bonds		10,994,000		90,000		5,064,000		144,000		16,058,000		234,000
Municipal revenue bonds		0		0		807,000		1,000		807,000		1,000
Other investments		0		0		0		0		0		0

	$	17,825,000	$	127,000	$	96,710,000	$	2,216,000	$	114,535,000	$	2,343,000

	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
December 31, 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			Amortized		Fair
	Yield			Cost		Value

Due in 2015		2.12	%	$	8,409,000	$	8,471,000
Due in 2016 through 2020		1.42			150,774,000		151,190,000
Due in 2021 through 2025		3.09			57,813,000		58,359,000
Due in 2026 and beyond		3.56			74,302,000		74,231,000
Mortgage-backed securities		1.69			72,211,000		72,964,000
Other investments		2.53			1,947,000		1,958,000

		2.21	%	$	365,456,000	$	367,173,000

- 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