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Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of restricted share awards

		Restricted Share Awards
		Performance and Service Required				Service Required				Total Restricted Awards				Weighted-Average Grant-Date Fair Value
Nonvested as of January 1, 2013			103,221				11,363				114,584			$	48.33
Granted			47,832				5,614				53,446				70.27
Vested			0				0				0				0
Forfeited			0				0				0				0
Nonvested as of March 31, 2013			151,053				16,977				168,030			$	55.31

The 1999 Stock Option Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Activity in company's plan

		Number of Shares				Weighted Average Exercise Price per Share				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value
Outstanding at January 1, 2013			32,150			$	40.93
Granted			0			$	0.00
Exercised			0			$	0.00
Forfeited			0			$	0.00
Outstanding (vested and expected to vest) at March 31, 2013			32,150			$	40.93				4.1			$	934
Exercisable at March 31, 2013			32,150			$	40.93				4.1			$	934

Long Term Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Activity in company's plan

		Number of Shares				Weighted Average Exercise Price per Share				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value
Outstanding at January 1, 2013			33,750			$	50.21
Granted			0				0
Exercised			0				0
Forfeited			0				0
Outstanding (vested and expected to vest) at March 31, 2013			33,750			$	50.21				8.6			$	667
Exercisable at March 31, 2013			17,375			$	46.00				8.1			$	416

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

-Paragraph 2

-Subparagraph (c)(1)

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

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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

-Subparagraph (c)(1)

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

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