Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Summary Of Activity In Corporation's Active Stock Plans


						Non-Vested Stock Awards/Stock Units Outstanding				Stock Options Outstanding
	Shares Available for Grant			Director Deferred Stock Units Outstanding		Number of Shares		Weighted- Average Grant-Date Fair Value		Number of Shares			Weighted- Average Exercise Price
Balance, January 1, 2012		1,963,455			22,092		169,530	$	50.33		4,968,822		$	51.49
Granted		—			—		—		—		—			—
Stock options exercised		—			—		—		—		(108,800	)		50.94
Stock awards vested		—			—		—		—		—			—
Forfeited		1,875			—		—		—		(1,875	)		51.81
Cancelled/expired		(125	)		—		—		—		—

Balance, March 31, 2012		1,965,205			22,092		169,530	$	50.33		4,858,147		$	51.50

Stock-Based Compensation Expense


	Three Months Ended March 31,
	2012		2011
Stock options	$	2,201	$	2,310
Non-vested stock awards/stock units		354		1,427

Total	$	2,555	$	3,737

Unrecognized Stock-Based Compensation Expense


Stock options	$	16,811
Non-vested stock awards/stock units		2,742

Total	$	19,553

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65, A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Section 50

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

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

+ Details