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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share for Continuing Operations | The following table sets forth the computation of basic and diluted earnings per share from continuing operations for the three months ended March 31, 2015 and 2014 (in thousands, except per share data).
|  | Three Months Ended March 31, |
|  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |
Income from continuing operations after income tax expense |  | $ | 19,503 |  |  | $ | 18,026 |
Denominator: |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 48,146 |  |  |  | 48,182 |
Diluted |  |  |  |  |  |  |  |
Stock options (1) |  |  | 778 |  |  |  | 865 |
Restricted stock awards (1) |  |  | 358 |  |  |  | 414 |
Contingent shares (2) |  |  | 95 |  |  |  | 100 |
Convertible senior subordinated notes (3) |  |  | 2,008 |  |  |  | 3,057 |
Diluted weighted average common shares outstanding |  |  | 51,385 |  |  |  | 52,618 |
Basic earnings per share from continuing operations |  | $ | 0.41 |  |  | $ | 0.37 |
Diluted earnings per share from continuing operations |  | $ | 0.38 |  |  | $ | 0.34 |
(1) | A total of 1.0 million and 0.3 million stock-based awards were excluded from the calculation of diluted earnings per share for the three months ended March 31, 2015 and 2014, respectively, as their effect would be anti-dilutive.
(2) | Contingent shares represent additional shares to be issued for purchase price earned by former owners of businesses acquired by CBIZ.
(3) | The dilutive impact of potential shares to be issued upon conversion of the 2010 Notes is based on the average share price of $8.74 and $8.98 for the three months ended March 31, 2015 and 2014, respectively, which exceeded the conversion price of $7.41.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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