2.2.0.25falsefalse0204 - Disclosure - Earnings Per Sharetruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $Jan-01-2011_Mar-31-2011http://www.sec.gov/CIK0000929008duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_EarningsPerShareAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEarnings Per Share [Abstract]3false0us-gaap_EarningsPerShareTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10pt; margin-top: 12pt"><b>4. EARNINGS PER SHARE</b> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     Basic earnings per share are computed by dividing net income by the weighted average common shares outstanding during the periods. Diluted earnings per share are computed by dividing net income by the weighted average common shares and common share equivalents outstanding during the periods. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method, which includes consideration of stock-based compensation and convertible debt. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The following table sets forth the details of basic and diluted earnings per share: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="76%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> <td width="5%"> </td> <td width="1%"> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6"><b>Three Months Ended</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: px solid #000000"><b>March 31,</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td><i>Amounts in thousands, except share and per share data</i></td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>2011</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>2010</b></td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Net income </div></td> <td> </td> <td align="left">$</td> <td align="right">37,305</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">19,200</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Weighted average common shares outstanding used in computing basic earnings per share </div></td> <td> </td> <td> </td> <td align="right">43,060,351</td> <td> </td> <td> </td> <td> </td> <td align="right">42,443,117</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Common shares issuable upon exercise of dilutive stock options </div></td> <td> </td> <td> </td> <td align="right">1,417,346</td> <td> </td> <td> </td> <td> </td> <td align="right">522,876</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Common shares issuable from contingently convertible debentures (see note below for basis of calculation) </div></td> <td> </td> <td> </td> <td align="right">5,955,068</td> <td> </td> <td> </td> <td> </td> <td align="right">687,990</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share </div></td> <td> </td> <td> </td> <td align="right">50,432,765</td> <td> </td> <td> </td> <td> </td> <td align="right">43,653,983</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Earnings per share: </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px">Basic </div></td> <td> </td> <td align="left">$</td> <td align="right">0.87</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.45</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px">Diluted </div></td> <td> </td> <td align="left">$</td> <td align="right">0.74</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.44</td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     For the three months ended March 31, 2011 and 2010, the computation of diluted earnings per share excluded 1.2 million and 3.2 million, respectively, of stock-settled stock appreciation rights at weighted average exercise prices of $62.84 per share and $41.62 per share, respectively. These amounts were excluded because their effect would have been antidilutive. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     Because of WESCO’s obligation to settle the par value of the 1.75% Convertible Senior Debentures due 2026 (the “2026 Debentures”) and the 6.0% Convertible Senior Debentures due 2029 (the “2029 Debentures” and together with the 2026 Debentures, the “Debentures”) in cash, WESCO is not required to include any shares underlying the Debentures in its diluted weighted average shares outstanding until the average stock price per share for the period exceeds the conversion price of the respective Debentures. At such time, only the number of shares that would be issuable (under the treasury stock method of accounting for share dilution) would be included, which is based upon the amount by which the average stock price exceeds the conversion price. The conversion prices of the 2029 Debentures and 2026 Debentures are $28.87 and $88.15, respectively. Share dilution is limited to a maximum of 11,951,939 shares for the 2029 Debentures and 2,507 shares for the 2026 Debentures. For the period ended March 31, 2011 and 2010, the effect of the Debentures on diluted earnings per share was a decrease of $0.10 and less than $0.01, respectively. </div>   </div>  <div style="font-family: 'Times New Roman',Times,serif"> </div>  <!-- Begin Block Tagged NotefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis element may be used to capture the complete disclosure pertaining to an entity's earnings per share.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 falsefalseEARNINGS PER SHARE12Earnings Per ShareUnKnownUnKnownUnKnownUnKnownfalsetrue