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Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Stock-Based Compensation [Abstract]

Summary of Stock Option Activity [Table Text Block]



	2016								2015								2014
			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	194,521		$	26.91					206,463		$	26.74					219,540		$	26.64
Granted	16,000			33.56					14,500			28.55					12,500			29.08
Exercised	(30,823)			27.34					(16,859)			26.19					(25,577)			27.05
Forfeited	(19,269)			27.86					(9,583)			27.02					-			-

Outstanding, end of year	160,429		$	27.37		$	931,963		194,521		$	26.91		$	362,754		206,463		$	26.74		$	477,640

Exercisable, end of year	144,429		$	26.39		$	931,963		180,021		$	26.78		$	359,854		193,963		$	26.59		$	477,640



Schedule of Fair Value Assumptions [Table Text Block]



	Years Ended December 31,
	2016			2015			2014
Dividend yield		3.93%			3.77%			3.57%
Expected life		10 years			10 years			10 years
Expected volatility		24.84%			24.35%			24.97%
Risk-free interest rate		2.44%			2.28%			2.17%
Weighted average fair value of options granted	$	5.79		$	4.89		$	5.30



Schedule of Outstanding Stock Options [Table Text Block]



			Average							Average
	Options		Exercise			Remaining		Options		Exercise
	Outstanding		Price			Life, Years		Exercisable		Price
	12,650		$	28.41		1.0		12,650		$	28.41
	13,200			25.00		2.0		13,200			25.00
	12,650			25.99		3.0		12,650			25.99
	1,100			24.44		3.2		1,100			24.44
	15,229			25.25		4.0		15,229			25.25
	19,800			24.97		5.0		19,800			24.97
	21,450			27.05		6.0		21,450			27.05
	1,100			27.55		6.0		1,100			27.55
	2,000			28.95		6.7		2,000			28.95
	21,250			26.90		7.0		21,250			26.90
	10,000			29.08		8.0		10,000			29.08
	14,000			28.55		9.0		14,000			28.55
	16,000			33.56		10.0		-			-

Total	160,429							144,429



Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]


		2016				2015
				Weighted-Average				Weighted-Average
		Number of		Grant Date		Number of		Grant Date
		Shares		Fair Value		Shares		Fair Value

Non-vested, beginning of year		13,810		$28.82		9,300		$29.08
Granted		8,450		33.56		6,650		28.55
Vested		(3,120)		28.85		(1,860)		29.08
Forfeited		(450)		28.80		(280)		29.08
Non-vested at December 31		18,690		$30.96		13,810		$28.82



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

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-Publisher FASB
-Name Accounting Standards Codification
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-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
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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.

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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
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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