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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Roll-forward of outstanding restricted stock grants issued

						Weighted-Average
						Grant Date Price
		Shares				per Share
Outstanding restricted stock grants as of December 31, 2010			164,832			$	69.72
Grants issued			109,333				79.45
Grants vested			(5,176	)			78.85
Grants forfeited			(8,368	)			64.74
Outstanding restricted stock grants as of December 31, 2011			260,621			$	73.78
Grants issued			83,100				77.25
Grants vested			(12,156	)			77.06
Grants forfeited			(944	)			68.04
Total outstanding restricted stock grants as of June 30, 2012			330,621			$	74.55

Expense recognition of deferred compensation

2012				2013				2014				2015				2016				2017				Total
$	2,506,528			$	4,368,970			$	4,034,636			$	3,122,752			$	1,261,206			$	444,734			$	15,738,826

Summary of Company expenses attributable to the 401(k) Plan

		2012				2011
Three Months Ended		$	264,802			$	238,597
Six Months Ended			517,721				479,442

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Schedule of expense recognition of deferred compensation arrangement.

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- Definition

Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ 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 (h)(1)

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

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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

-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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