2.2.0.25falsefalse2108100 - Disclosure - Income Tax Expense (Benefit)truefalsefalse1falsefalseUSDfalsefalse4/1/2010 - 12/31/2010 USD ($) USD ($) / shares $D2011Q3YTDhttp://www.sec.gov/CIK0000815065duration2010-04-01T00:00:002010-12-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170usdPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0ste_NotesToFinancialStatementsAbstractstefalsenadurationNotes to Financial Statements [Abstract]falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNotes to Financial Statements [Abstract]falsefalseNotes To Financial Statements [Abstract]3false0us-gaap_IncomeTaxDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Income Tax Expense </font></div><div style="line-height:120%;text-indent:20px;"><font style="font-family:inherit;font-size:10pt;">&nbsp;</font></div><div style="line-height:120%;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Income tax expense includes United States federal, state and local, and foreign income taxes, and is based on reported pre-tax income. The effective income tax rates for the three-month periods ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2009</font><font style="font-family:inherit;font-size:10pt;"> were </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">34.3%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">27.6%</font><font style="font-family:inherit;font-size:10pt;">. The effective income tax rates for the </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">nine</font><font style="font-family:inherit;font-size:10pt;">-month periods ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2009</font><font style="font-family:inherit;font-size:10pt;"> were </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">36.6%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">31.4%</font><font style="font-family:inherit;font-size:10pt;">, respectively. The lower effective income tax rates for the three-month and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">nine</font><font style="font-family:inherit;font-size:10pt;">-month periods ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2009</font><font style="font-family:inherit;font-size:10pt;"> were the result of favorable discrete item adjustments and tax planning initiatives.</font></div><div style="line-height:120%;text-indent:20px;"><font style="font-family:inherit;font-size:10pt;">&nbsp;</font></div><div style="line-height:120%;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Income tax expense is provided on an interim basis based upon our estimate of the annual effective income tax rate, adjusted each quarter for discrete items. In determining the estimated annual effective income tax rate, we analyze various factors, including projections of our annual earnings and taxing jurisdictions in which the earnings will be generated, the impact of state and local income taxes, our ability to use tax credits and net operating loss carry forwards, and available tax planning alternatives.</font></div><div style="line-height:120%;text-indent:20px;"><font style="font-family:inherit;font-size:10pt;">&nbsp;</font></div><div style="line-height:120%;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">March 31, 2010</font><font style="font-family:inherit;font-size:10pt;">, we had $11,788 in unrecognized tax benefits, of which $2,740 would favorably impact the effective tax rate if recognized. As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;">, we had $12,059 in unrecognized tax benefits, of which $3,869 would favorably impact the effective tax rate if recognized. The increase in unrecognized tax benefits for the </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">nine</font><font style="font-family:inherit;font-size:10pt;"> months ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;"> is primarily due to a increase in unrecognized tax benefits relating to prior years. We believe that it is reasonably possible that unrecognized tax benefits could decrease by up to $2,893 within 12 months of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;">, primarily as a result of settlements with tax authorities. As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;">, we have recognized a liability for interest of $1,485 and penalties of $81.</font></div><div style="line-height:120%;text-indent:20px;"><font style="font-family:inherit;font-size:10pt;">&nbsp;</font></div><div style="line-height:120%;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We operate in numerous taxing jurisdictions and are subject to regular examinations by various United States federal, state, and local, as well as foreign, jurisdictions. We are no longer subject to United States federal examinations for years before fiscal 2008 and, with limited exceptions, we are no longer subject to United States state and local, or non-United States, income tax examinations by tax authorities for years before fiscal 2006. We remain subject to tax authority audits in various jurisdictions wherever we do business. We do not expect the results of these examinations to have a material adverse affect on our consolidated financial statements.</font></div><div style="line-height:120%;text-indent:20px;"><font style="font-family:inherit;font-size:10pt;">&nbsp;</font></div></div>Income Tax Expense &nbsp;Income tax expense includes United States federal, state and local, and foreign income taxes, and is based on reported pre-tax income.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire income tax disclosure. Examples 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. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 136, 172 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 44, 45, 46, 47, 48, 49 falsefalseIncome Tax Expense (Benefit)12Income Tax Expense (Benefit)UnKnownUnKnownUnKnownUnKnownfalsetrue