Note 2 - Securities (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2017
U .S. Government agency debt obligations	$	165,551,000	$	208,000	$	(4,591,000	)	$	161,168,000
Mortgage-backed securities		39,304,000		405,000		(214,000	)		39,495,000
Municipal general obligation bonds		121,803,000		1,750,000		(243,000	)		123,310,000
Municipal revenue bonds		4,099,000		51,000		(16,000	)		4,134,000
Other investments		2,002,000		0		(19,000	)		1,983,000
	$	332,759,000	$	2,414,000	$	(5,083,000	)	$	330,090,000
December 31, 201 6
U .S. Government agency debt obligations	$	159,271,000	$	106,000	$	(7,337,000	)	$	152,040,000
Mortgage-backed securities		47,329,000		486,000		(423,000	)		47,392,000
Municipal general obligation bonds		120,284,000		312,000		(1,549,000	)		119,047,000
Municipal revenue bonds		7,699,000		23,000		(91,000	)		7,631,000
Other investments		1,979,000		0		(29,000	)		1,950,000
	$	336,562,000	$	927,000	$	(9,429,000	)	$	328,060,000

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, 2017
U.S. Government agency debt obligations	$	81,981,000	$	2,496,000	$	47,265,000	$	2,095,000	$	129,246,000	$	4,591,000
Mortgage-backed securities		21,482,000		121,000		9,416,000		93,000		30,898,000		214,000
Municipal general obligation bonds		10,280,000		90,000		8,436,000		153,000		18,716,000		243,000
Municipal revenue bonds		0		0		1,101,000		16,000		1,101,000		16,000
Other investments		1,502,000		19,000		0		0		1,502,000		19,000
	$	115,245,000	$	2,726,000	$	66,218,000	$	2,357,000	$	181,463,000	$	5,083,000

	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 31, 201 6
U.S. Government agency debt obligations	$	110,160,000	$	7,172,000	$	5,073,000	$	165,000	$	115,233,000	$	7,337,000
Mortgage-backed securities		3,670,000		4,000		37,072,000		419,000		40,742,000		423,000
Municipal general obligation bonds		65,895,000		1,360,000		27,734,000		189,000		93,629,000		1,549,000
Municipal revenue bonds		1,921,000		90,000		206,000		1,000		2,127,000		91,000
Other investments		1,479,000		29,000		0		0		1,479,000		29,000
	$	183,125,000	$	8,655,000	$	70,085,000	$	774,000	$	253,210,000	$	9,429,000

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted Average Yield			Amortized Cost		Fair Value
Due in 201 7		1.51	%	$	3,307,000	$	3,307,000
Due in 201 8 through 2022		2.20			95,857,000		96,451,000
Due in 202 3 through 2027		2.71			99,198,000		98,217,000
Due in 202 8 and beyond		2.94			93,091,000		90,637,000
Mortgage-backed securities		2.06			39,304,000		39,495,000
Other investments		2.03			2,002,000		1,983,000
Total available for sale securities		2.53	%	$	332,759,000	$	330,090,000