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The difference between the consolidated effective income tax rate and the U.S. federal statutory rate is primarily attributable to state income taxes, foreign income taxes and the effect of certain permanent differences.&lt;/div&gt;&lt;div style="text-align: justify; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"&gt;&amp;#160;&lt;/div&gt;&lt;div style="text-align: left; text-indent: 27pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;The Company's effective tax rate for the three and six months ended June 30, 2013 was 10.4% and 11.4%, respectively, compared to 13.3% and 14.0&amp;#160;% for the three and six months ended June 30, 2012, respectively. The lower effective tax rate for the three and six months ended June 30, 2013 was due primarily to higher pretax income from foreign operations where statutory rates are lower than the U.S. income tax rates.&lt;/div&gt;&lt;div style="text-align: justify; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"&gt;&amp;#160;&lt;/div&gt;&lt;div style="text-align: left; text-indent: 36pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;The Company recognizes in the financial statements a liability for tax uncertainty if it is more likely than not that the position will be sustained on audit, based on the technical merits of the position. As of June 30, 2013, the Company had unrecognized tax benefits of $0.2 million, which if recognized, would reduce the Company's effective tax rate. Total accrued interest relating to unrecognized tax benefits was less than &lt;font style="display: inline; font-size: 10pt;"&gt;$0.1 million &lt;/font&gt;as of June 30, 2013. The Company does not believe the total amount of unrecognized tax benefits as of June 30, 2013 will increase or decrease for the remainder of 2013.&lt;/div&gt;&lt;div style="text-align: left; text-indent: 36pt; display: block; margin-left: 0pt; margin-right: 0pt;"&gt;&amp;#160;&lt;/div&gt;&lt;div style="text-align: left; text-indent: 36pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;In June 2012, the Company received notification from the Internal Revenue Service (IRS) that the Company's 2008 and 2009 U.S. federal income tax returns had been selected for examination.&amp;#160; In June 2013, the Company received notification from the IRS that they had completed their examination for both 2008 and 2009, making changes to taxable income for those years.&amp;#160; The changes did not&amp;#160;materially alter the Company's income tax for those years.&lt;/div&gt;&lt;/div&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

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