Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company records income tax expense during interim periods based on its best estimate of the full year’s tax rate. Certain items are given discrete period treatment and, as a result, the tax effects of such items are reported in full in the relevant interim period. The Company’s tax rate was 35.2% for the three months ended March 31, 2013 compared to 33.7% for the three months ended March 31, 2012. The Company had previously filed federal income tax refund claims for research and experimentation credits. The Company recorded an income tax benefit of $2.0 million during the three months ended March 31, 2013 resulting from a resolution reached with the IRS in regards to the 2008 and 2009 refund claims. This income tax benefit relates to the resolved claim years and certain post-audit periods that are still subject to examination. The full year 2013 tax rate can be affected as a result of variances among the estimates and amounts of full year sources of taxable income (e.g., domestic consolidated, joint venture and/or international), the realization of tax credits (e.g., historic rehabilitation, research and experimentation, foreign tax and state incentive), adjustments which may arise from the resolution of tax matters under review and the Company’s assessment of its liability for uncertain tax positions.

Income Taxes

3 Months Ended

Mar. 31, 2013

The Company records income tax expense during interim periods based on its best estimate of the full year’s tax rate. Certain items are given discrete period treatment and, as a result, the tax effects of such items are reported in full in the relevant interim period. The Company’s tax rate was 35.2% for the three months ended March 31, 2013 compared to 33.7% for the three months ended March 31, 2012.

The Company had previously filed federal income tax refund claims for research and experimentation credits. The Company recorded an income tax benefit of $2.0 million during the three months ended March 31, 2013 resulting from a resolution reached with the IRS in regards to the 2008 and 2009 refund claims. This income tax benefit relates to the resolved claim years and certain post-audit periods that are still subject to examination.

The full year 2013 tax rate can be affected as a result of variances among the estimates and amounts of full year sources of taxable income (e.g., domestic consolidated, joint venture and/or international), the realization of tax credits (e.g., historic rehabilitation, research and experimentation, foreign tax and state incentive), adjustments which may arise from the resolution of tax matters under review and the Company’s assessment of its liability for uncertain tax positions.