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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-Based Compensation [Abstract]

Summary of Stock Option Activity [Table Text Block]

	2013								2012								2011
			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	225,670		$	26.27					229,836		$	25.85					207,534		$	25.93		$
Granted	28,600			27.07					30,250			27.05					31,900			24.94
Exercised	(24,127)			23.83					(20,435)			22.19					(2,833)			17.90
Forfeited	(10,603)			28.92					(13,981)			26.88					(6,765)			27.50
Outstanding, end of year	219,540		$	26.64		$	146,970		225,670		$	26.27		$	256,499		229,836		$	25.85		$	113,352
Exercisable, end of year	190,940		$	26.58		$	146,900		196,489		$	26.15		$	256,499		199,005		$	25.99		$	112,152

Schedule of Fair Value Assumptions [Table Text Block]

	Years Ended December 31,
	2013			2012			2011
Dividend yield		3.49%			3.27%			3.30%
Expected life		10 years			10 years			7 years
Expected volatility		25.91%			25.37%			25.35%
Risk-free interest rate		3.01%			1.76%			1.39%
Weighted average fair value of options granted	$	5.72		$	5.61		$	4.70

Schedule of Outstanding Stock Options [Table Text Block]

			Average							Average
	Options		Exercise			Remaining		Options		Exercise
	Outstanding		Price			Life, Years		Exercisable		Price
	15,594		$	27.27		1.0		15,594		$	27.27
	20,796			27.62		2.3		20,796			27.62
	18,700			28.64		3.0		18,700			28.64
	18,700			28.41		4.0		18,700			28.41
	19,800			25.00		5.0		19,800			25.00
	1,100			26.27		5.3		1,100			26.27
	18,700			25.99		6.0		18,700			25.99
	1,100			24.44		6.2		1,100			24.44
	23,650			25.25		7.0		23,650			25.25
	25,850			24.97		8.0		25,850			24.97
	26,950			27.05		9.0		26,950			27.05
	1,100			27.55		9.0		-			-
	2,000			28.95		9.7		-			-
	25,500			26.90		10.0		-			-
Total	219,540							190,940

X

- Definition

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

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

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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

-Publisher FASB

-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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