Securities Available for Sale (Tables)

12 Months Ended

Dec. 31, 2018

Investments Debt And Equity Securities [Abstract]

Summary of the Amortized Cost and Fair Value of Available-for-Sale Investment Securities Corresponding Amounts of Unrealized Gains and Losses

The following table summarizes the amortized cost and fair value of the available-for-sale securities portfolio at December 31, 2018 and 2017 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:

				Gross		Gross
		Amortized		Unrealized		Unrealized
	2018	Cost		Gains		Losses			Fair Value
U.S. Treasury and U.S. government sponsored entities		$	6,111	$	0	$	(102	)	$	6,009
State and political subdivisions			211,762		2,075		(1,893	)		211,944
Corporate bonds			1,206		0		(18	)		1,188
Mortgage-backed securities - residential			154,130		84		(4,167	)		150,047
Collateralized mortgage obligations			21,775		72		(775	)		21,072
Small Business Administration			12,292		0		(362	)		11,930
Totals		$	407,276	$	2,231	$	(7,317	)	$	402,190

				Gross		Gross
		Amortized		Unrealized		Unrealized
	2017	Cost		Gains		Losses			Fair Value
U.S. Treasury and U.S. government sponsored entities		$	8,986	$	0	$	(69	)	$	8,917
State and political subdivisions			188,032		3,614		(643	)		191,003
Corporate bonds			1,238		4		(8	)		1,234
Mortgage-backed securities - residential			161,635		419		(1,604	)		160,450
Collateralized mortgage obligations			17,898		0		(777	)		17,121
Small Business Administration			14,608		0		(396	)		14,212
Totals		$	392,397	$	4,037	$	(3,497	)	$	392,937

Proceeds from Sales of Available-for-Sale Securities and the Associated Gains and Losses

The proceeds from sales of available-for-sale securities and the associated gains and losses were as follows:

		2018			2017			2016
Proceeds	$	16,162		$	54,497		$	11,493
Gross gains		408			727			389
Gross losses		(125	)		(723	)		(316	)

Amortized Cost and Fair Value of the Debt Securities Maturity

The amortized cost and fair value of the debt securities portfolio are shown by expected maturity. Expected maturities may differ from contractual maturities if issuers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

Available for sale		December 31, 2018
		Amortized
Maturity		Cost		Fair Value
Within one year		$	5,611	$	5,601
One to five years			41,647		41,682
Five to ten years			146,439		146,769
Beyond ten years			25,382		25,089
Mortgage-backed securities, collateralized mortgage obligations and Small Business Administration			188,197		183,049
	Totals	$	407,276	$	402,190

Investment Securities with Unrealized Losses

The following table summarizes the investment securities with unrealized losses at December 31, 2018 and 2017 aggregated by major security type and length of time in a continuous unrealized loss position.

2018
	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Description of Securities	Value		Loss			Value		Loss			Value		Loss
U.S. Treasury and U.S. government
sponsored entities	$	648	$	(2	)	$	5,065	$	(100	)	$	5,713	$	(102	)
State and political subdivisions		23,569		(201	)		64,174		(1,692	)		87,743		(1,893	)
Corporate bonds		516		(4	)		672		(14	)		1,188		(18	)
Mortgage-backed securities - residential		13,002		(114	)		126,200		(4,053	)		139,202		(4,167	)
Collateralized mortgage obligations		20		(1	)		14,003		(774	)		14,023		(775	)
Small Business Administration		11		0			11,919		(362	)		11,930		(362	)
Total temporarily impaired	$	37,766	$	(322	)	$	222,033	$	(6,995	)	$	259,799	$	(7,317	)

2017
	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
Description of Securities	Value		Loss			Value		Loss			Value		Loss
U.S. Treasury and U.S. government
sponsored entities	$	3,970	$	(34	)	$	1,912	$	(35	)	$	5,882	$	(69	)
State and political subdivisions		33,188		(220	)		25,721		(423	)		58,909		(643	)
Corporate bonds		397		(3	)		383		(5	)		780		(8	)
Mortgage-backed securities - residential		40,072		(400	)		53,760		(1,204	)		93,832		(1,604	)
Collateralized mortgage obligations		1,701		(22	)		15,420		(755	)		17,121		(777	)
Small Business Administration		0		0			14,182		(396	)		14,182		(396	)
Total temporarily impaired	$	79,328	$	(679	)	$	111,378	$	(2,818	)	$	190,706	$	(3,497	)