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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Stock-Based Compensation [Abstract]

Summary of Stock Option Activity



	2017								2016								2015
			Weighted								Weighted								Weighted
			Average			Average					Average			Average					Average			Aggregate
			Exercise			Intrinsic					Exercise			Intrinsic					Exercise			Intrinsic
	Options		Price			Value			Options		Price			Value			Options		Price			Value

Outstanding, beginning of year	225,669		$	19.46					276,807		$	17.94					294,720		$	17.83
Granted	34,750			32.81					24,000			22.37					21,750			19.03
Exercised	(44,219)			23.53					(46,235)			18.23					(25,289)			17.46
Forfeited	(3,475)			21.71					(28,904)			18.57					(14,375)			18.01

Outstanding, end of year	212,725		$	20.76		$	2,604,097		225,669		$	19.46		$	931,963		276,807		$	17.94		$	362,754

Exercisable, end of year	177,975		$	18.41		$	2,597,494		216,644		$	17.59		$	931,963		270,032		$	17.85		$	359,854



Schedule of Fair Value Assumptions



	Years Ended December 31,
	2017			2016			2015
Dividend yield		3.89%			3.93%			3.77%
Expected life		10 years			10 years			10 years
Expected volatility		29.11%			24.84%			24.35%
Risk-free interest rate		2.41%			2.44%			2.28%
Weighted average fair value of options granted	$	6.83		$	5.79		$	4.89



Schedule of Outstanding Stock Options



			Average							Average
	Options		Exercise			Remaining		Options		Exercise
	Outstanding		Price			Life, Years		Exercisable		Price
	9,075		$	16.67		1.0		9,075		$	16.67
	17,325			17.33		2.0		17,325			17.33
	15,675			16.83		3.0		15,675			16.83
	20,625			16.65		4.0		20,625			16.65
	29,700			18.03		5.0		29,700			18.03
	1,650			18.36		5.0		1,650			18.36
	3,000			19.30		5.8		3,000			19.30
	26,925			17.93		6.0		26,925			17.93
	14,250			19.39		6.9		14,250			19.39
	16,500			19.03		7.9		16,500			19.03
	23,250			22.37		9.0		23,250			22.37
	34,750			32.81		10.0		-			-

Total	212,725							177,975



Summary of Restricted Stock Activity


		2017				2016
				Weighted-Average				Weighted-Average
		Number of		Grant Date		Number of		Grant Date
		Shares		Fair Value		Shares		Fair Value

Non-vested, beginning of year		28,035		$20.64		20,715		$19.21
Granted		9,400		32.81		12,675		22.37
Vested		(7,020)		20.37		(4,680)		19.23
Forfeited		-		-		(675)		19.20
Non-vested at December 31		30,415		$24.46		28,035		$20.64



X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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