CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $) In Thousands	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010
CONSOLIDATED STATEMENTS OF EQUITY
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, tax benefit	$ 1,017	$ 613

Tax benefit associated with any share-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 62

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