Income Taxes	6 Months Ended
Jun. 30, 2011
Income Taxes
Income Taxes	Footnote 8 — Income Taxes The Company's income tax expense and resulting effective tax rate are based upon the respective estimated annual effective tax rates applicable for the respective periods adjusted for the effect of items required to be treated as discrete to the period, including adjustments to write down deferred tax assets determined not to be realizable due to the vesting or cancellation of equity-based compensation awards, changes in tax laws, changes in estimated exposures for uncertain tax positions, and other items. The Company's effective tax rate for the three and six months ended June 30, 2011 was favorably impacted by a benefit of $20.8 million associated with the realization of unrecognized tax benefits, including interest and penalties, due to the expiration of various worldwide statutes of limitation. The effective tax rate for the six months ended June 30, 2011 was also favorably impacted by a change in the geographical mix in earnings. The Company's effective tax rate for the six months ended June 30, 2010 was favorably impacted by a benefit of $8.2 million due to the reversal of certain tax reserves upon resolution of a tax examination offset by $6.7 million of income tax expense due to the write-off of deferred tax assets determined not to be realizable upon the vesting of restricted stock. In addition, the tax rate for the six months ended June 30, 2010 was adversely impacted by the expiration of certain U.S. tax incentives, including credits for certain research and development activities.

Income Taxes

6 Months Ended

Jun. 30, 2011

Footnote 8 — Income Taxes

The Company's income tax expense and resulting effective tax rate are based upon the respective estimated annual effective tax rates applicable for the respective periods adjusted for the effect of items required to be treated as discrete to the period, including adjustments to write down deferred tax assets determined not to be realizable due to the vesting or cancellation of equity-based compensation awards, changes in tax laws, changes in estimated exposures for uncertain tax positions, and other items. The Company's effective tax rate for the three and six months ended June 30, 2011 was favorably impacted by a benefit of $20.8 million associated with the realization of unrecognized tax benefits, including interest and penalties, due to the expiration of various worldwide statutes of limitation. The effective tax rate for the six months ended June 30, 2011 was also favorably impacted by a change in the geographical mix in earnings.

The Company's effective tax rate for the six months ended June 30, 2010 was favorably impacted by a benefit of $8.2 million due to the reversal of certain tax reserves upon resolution of a tax examination offset by $6.7 million of income tax expense due to the write-off of deferred tax assets determined not to be realizable upon the vesting of restricted stock. In addition, the tax rate for the six months ended June 30, 2010 was adversely impacted by the expiration of certain U.S. tax incentives, including credits for certain research and development activities.