Note 2 - Securities (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
June 30, 2018
U.S. Government agency debt obligations	$	193,956,000	$	29,000	$	(11,805,000	)	$	182,180,000
Mortgage-backed securities		45,397,000		224,000		(1,064,000	)		44,557,000
Municipal general obligation bonds		101,252,000		381,000		(1,481,000	)		100,152,000
Municipal revenue bonds		3,816,000		5,000		(68,000	)		3,753,000
Other investments		500,000		0		0			500,000
	$	344,921,000	$	639,000	$	(14,418,000	)	$	331,142,000
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
June 30, 2018
U.S. Government agency debt obligations	$	74,410,000	$	2,780,000	$	103,448,000	$	9,025,000	$	177,858,000	$	11,805,000
Mortgage-backed securities		19,792,000		603,000		15,028,000		461,000		34,820,000		1,064,000
Municipal general obligation bonds		64,436,000		847,000		13,321,000		634,000		77,757,000		1,481,000
Municipal revenue bonds		1,597,000		14,000		1,061,000		54,000		2,658,000		68,000
Other investments		0		0		0		0		0		0
	$	160,235,000	$	4,244,000	$	132,858,000	$	10,174,000	$	293,093,000	$	14,418,000

	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		1.68	%	$	9,296,000	$	9,289,000
Due in 2019 through 2023		2.18			77,853,000		76,964,000
Due in 2024 through 2028		2.61			106,754,000		101,512,000
Due in 2029 and beyond		3.04			105,121,000		98,320,000
Mortgage-backed securities		2.59			45,397,000		44,557,000
Other investments		2.56			500,000		500,000
Total available for sale securities		2.62	%	$	344,921,000	$	331,142,000