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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

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

Changes in restricted shares outstanding for the year ended December 31, 2012 were as follows:

	Shares			Fair Value
Balance at December 31, 2011	57,717			$	27.15
Granted	28,370				34.03
Vested	(30,944	)			25.48
Forfeited	(268	)			33.56
Balance at December 31, 2012	54,875			$	31.61

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

Changes in options outstanding for the year ended December 31, 2012 were as follows:

			Weighted Average
	Shares		Exercise Price
Balance at December 31, 2011	33,691		$	16.17
Exercised	33,691		$	16.17
Balance at December 31, 2012	0			—

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

A summary of the activity of the non-vested options during 2012 is shown below.

				Weighted Average
	Shares			Grant Date Fair Value
Non-vested at December 31, 2011	4,041			$	2.45
Vested	(4,041	)		$	2.45
Non-vested at December 31, 2012	0				—

Schedule Of Per Share Fair Value Of Stock Appreciation Rights [Table Text Block]

The Company uses the Black-Scholes option-pricing model to determine the fair value of the SARs at the date of grant. Following are the assumptions used to estimate the $8.60 per share fair value.

	Year Ended December 31, 2012
Risk-free interest rate	1.38%
Expected life	7 years
Expected volatility	29.39%
Expected dividend yield	1.84%

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

Changes in SARs outstanding for the year ended December 31, 2012 were as follows:

	Shares			Weighted Average Exercise Price
Balance at December 31, 2011	365,845			$	24.43
Granted	92,352			$	33.56
Forfeited	(1,005	)		$	33.56
Exercised	(105,311	)		$	21.87
Balance at December 31, 2012	351,881			$	27.52
Exercisable at December 31, 2012	190,587			$	23.98

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Tabular disclosure of schedule of per share fair value of stock appreciation rights.

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

+ 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 (c)(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 (c)(1)

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+ References

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-Name Accounting Standards Codification

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