Note 2 - Securities (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
June 30, 2016
U.S. Government agency debt obligations	$	132,085,000	$	895,000	$	(38,000	)	$	132,942,000
Mortgage-backed securities		56,616,000		979,000		(50,000	)		57,545,000
Municipal general obligation bonds		119,878,000		2,602,000		(94,000	)		122,386,000
Municipal revenue bonds		8,498,000		95,000		0			8,593,000
Other investments		1,962,000		24,000		0			1,986,000
	$	319,039,000	$	4,595,000	$	(182,000	)	$	323,452,000
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 Vaule		Unrealized Loss
June 30, 2016
U.S. Government agency debt obligations	$	3,991,000	$	9,000	$	2,958,000	$	29,000	$	6,949,000	$	38,000
Mortgage-backed securities		3,212,000		16,000		9,899,000		34,000		13,111,000		50,000
Municipal general obligation bonds		850,000		5,000		9,042,000		89,000		9,892,000		94,000
Municipal revenue bonds		557,000		0		0		0		557,000		0
Other investments		0		0		0		0		0		0
	$	8,610,000	$	30,000	$	21,899,000	$	152,000	$	30,509,000	$	182,000

	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		1.44	%	$	32,582,000	$	32,601,000
Due in 2017 through 2021		1.83			119,275,000		120,413,000
Due in 2022 through 2026		3.10			55,510,000		56,994,000
Due in 2027 and beyond		3.27			53,094,000		53,913,000
Mortgage-backed securities		1.76			56,616,000		57,545,000
Other investments		3.06			1,962,000		1,986,000
		2.24	%	$	319,039,000	$	323,452,000