Note 2 - Securities (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2016
U.S. Government agency debt obligations	$	138,133,000	$	391,000	$	(641,000	)	$	137,883,000
Mortgage-backed securities		51,671,000		956,000		(58,000	)		52,569,000
Municipal general obligation bonds		122,293,000		2,357,000		(164,000	)		124,486,000
Municipal revenue bonds		8,458,000		70,000		(10,000	)		8,518,000
Other investments		1,970,000		17,000		0			1,987,000
	$	322,525,000	$	3,791,000	$	(873,000	)	$	325,443,000
December 31, 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

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

	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
September 30, 2016
U.S. Government agency debt obligations	$	52,728,000	$	633,000	$	1,992,000	$	8,000	$	54,720,000	$	641,000
Mortgage-backed securities		787,000		3,000		15,064,000		55,000		15,851,000		58,000
Municipal general obligation bonds		14,524,000		86,000		6,644,000		78,000		21,168,000		164,000
Municipal revenue bonds		1,502,000		10,000		0		0		1,502,000		10,000
Other investments		0		0		0		0		0		0
	$	69,541,000	$	732,000	$	23,700,000	$	141,000	$	93,241,000	$	873,000

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

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted Average Yield			Amortized Cost		Fair Value
Due in 2016		2.07	%	$	14,095,000	$	14,030,000
Due in 2017 through 2021		1.83			116,939,000		117,856,000
Due in 2022 through 2026		2.78			69,857,000		70,885,000
Due in 2027 and beyond		2.86			67,993,000		68,116,000
Mortgage-backed securities		1.77			51,671,000		52,569,000
Other investments		4.60			1,970,000		1,987,000
		2.27	%	$	322,525,000	$	325,443,000