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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share from Continuing Operations | The following table sets forth the computation of basic and diluted earnings per share from continuing operations for the three and six months ended June 30, 2020 and 2019 (in thousands, except per share data).
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 21,479 |  |  | $ | 16,614 |  |  | $ | 58,341 |  |  | $ | 54,179 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 54,142 |  |  |  | 54,090 |  |  |  | 54,356 |  |  |  | 54,188 |
Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options (1) |  |  | 760 |  |  |  | 1,188 |  |  |  | 869 |  |  |  | 1,247 |
Restricted stock units and awards (1) |  |  | 146 |  |  |  | 176 |  |  |  | 222 |  |  |  | 225 |
Contingent shares (2) |  |  | 68 |  |  |  | 41 |  |  |  | 68 |  |  |  | 41 |
Diluted weighted average common shares outstanding (3) |  |  | 55,116 |  |  |  | 55,495 |  |  |  | 55,515 |  |  |  | 55,701 |
Basic earnings per share from continuing operations |  | $ | 0.40 |  |  | $ | 0.31 |  |  | $ | 1.07 |  |  | $ | 1.00 |
Diluted earnings per share from continuing operations |  | $ | 0.39 |  |  | $ | 0.30 |  |  | $ | 1.05 |  |  | $ | 0.97 |
| (1) | A total of 0.4 million and 0.4 million share based awards were excluded from the calculation of diluted earnings per share for the three and six months ended June 30, 2020, respectively, and a total of 0.5 million and 0.5 million share based awards were excluded from the calculation of diluted earnings per share for the three and six months ended June 30, 2019, 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 us once future considerations have been met. Refer to Note 11, Business Combinations, for further details.
| (3) | The denominator used in calculating diluted earnings per share d id not include 0.3 million performance share units for both the three and six months ended June 30, 2020, and th e denominator used in calculating diluted earnings per share did not include 0.2 million performance share units for both the three and six months ended June 30, 2019. The performance conditions associated with these performance share units were not met and consequently none of these performance share units were considered as issuable for the three and six months ended June 30, 2020 and 2019.

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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://fasb.org/us-gaap/role/ref/legacyRef -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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