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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
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, 2022 and 2021 (in thousands, except per share data):
| Three Months Ended June 30, |  | Six Months Ended June 30, |
| 2022 |  | 2021 |  | 2022 |  | 2021 |
Numerator: |  |  |  |  |  |  |  |
Income from continuing operations | $ | 31,260 |  |  | $ | 8,613 |  |  | $ | 89,391 |  |  | $ | 58,829 |  |
Denominator: |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Weighted average common shares outstanding | 51,911 |  |  | 52,874 |  |  | 52,015 |  |  | 53,119 |  |
Diluted |  |  |  |  |  |  |  |
Stock options (1) | 508 |  |  | 676 |  |  | 564 |  |  | 733 |  |
Restricted stock units and awards (1) | 112 |  |  | 182 |  |  | 157 |  |  | 220 |  |
Contingent shares (2) | — |  |  | 37 |  |  | — |  |  | 37 |  |
Diluted weighted average common shares outstanding (3) | 52,531 |  |  | 53,769 |  |  | 52,736 |  |  | 54,109 |  |
Basic earnings per share from continuing operations | $ | 0.60 |  |  | $ | 0.16 |  |  | $ | 1.72 |  |  | $ | 1.11 |  |
Diluted earnings per share from continuing operations | $ | 0.60 |  |  | $ | 0.16 |  |  | $ | 1.70 |  |  | $ | 1.09 |  |
(1)A total of 17 thousand and 86 thousand shares of stock-based awards were excluded from the calculation of diluted earnings per share for the three and six months ended June 30, 2022, respectively, as their effect would be anti-dilutive. A total of 5 thousand stock-based awards were excluded from the calculation of diluted earnings per share for the six months ended June 30, 2021. We did not exclude any stock-based awards from the calculation of diluted earnings per share for the three months ended June 30, 2021, as their effect was 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 did not include 360 thousand performance share units for both the three and six months ended June 30, 2022, and the denominator used in calculating diluted earnings per share did not include 447 thousand performance share units for both the three and six months ended June 30, 2021. 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, 2022 and 2021.

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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