Note 2 - Securities (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2018
U.S. Government agency debt obligations	$	194,900,000	$	0	$	(14,086,000	)	$	180,814,000
Mortgage-backed securities		42,719,000		189,000		(1,271,000	)		41,637,000
Municipal general obligation bonds		101,514,000		272,000		(1,921,000	)		99,865,000
Municipal revenue bonds		3,801,000		1,000		(87,000	)		3,715,000
Other investments		500,000		0		0			500,000
	$	343,434,000	$	462,000	$	(17,365,000	)	$	326,531,000
December 31, 201 7
U.S. Government agency debt obligations	$	175,953,000	$	99,000	$	(6,352,000	)	$	169,700,000
Mortgage-backed securities		38,967,000		335,000		(510,000	)		38,792,000
Municipal general obligation bonds		121,040,000		891,000		(638,000	)		121,293,000
Municipal revenue bonds		3,978,000		30,000		(30,000	)		3,978,000
Other investments		2,010,000		0		(29,000	)		1,981,000
	$	341,948,000	$	1,355,000	$	(7,559,000	)	$	335,744,000

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, 2018
U.S. Government agency debt obligations	$	60,017,000	$	2,623,000	$	120,797,000	$	11,463,000	$	180,814,000	$	14,086,000
Mortgage-backed securities		15,460,000		484,000		22,444,000		787,000		37,904,000		1,271,000
Municipal general obligation bonds		70,463,000		1,117,000		14,328,000		804,000		84,791,000		1,921,000
Municipal revenue bonds		2,324,000		24,000		1,051,000		63,000		3,375,000		87,000
Other investments		0		0		0		0		0		0
	$	148,264,000	$	4,248,000	$	158,620,000	$	13,117,000	$	306,884,000	$	17,365,000

	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 31, 2017
U.S. Government agency debt obligations	$	35,677,000	$	434,000	$	115,374,000	$	5,918,000	$	151,051,000	$	6,352,000
Mortgage-backed securities		10,179,000		156,000		21,084,000		354,000		31,263,000		510,000
Municipal general obligation bonds		12,807,000		114,000		54,703,000		524,000		67,510,000		638,000
Municipal revenue bonds		0		0		1,187,000		30,000		1,187,000		30,000
Other investments		1,510,000		29,000		0		0		1,510,000		29,000
	$	60,173,000	$	733,000	$	192,348,000	$	6,826,000	$	252,521,000	$	7,559,000

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted Average Yield	Amortized Cost		Fair Value
Due in 2018	1.69%	$	6,400,000	$	6,397,000
Due in 2019 through 2023	2.17		77,542,000		76,463,000
Due in 2024 through 2028	2.60		106,528,000		100,317,000
Due in 2029 and beyond	3.07		109,745,000		101,217,000
Mortgage-backed securities	2.60		42,719,000		41,637,000
Other investments	3.94		500,000		500,000
Total available for sale securities	2.64%	$	343,434,000	$	326,531,000