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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share from Continuing Operations | EARNINGS PER SHARE The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share from continuing operations for the years ended December 31, 2020, 2019 and 2018 (in thousands, except per share data):
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Numerator: |  |  |  |  |
Income from continuing operations | $ | 78,347 |  |  | $ | 71,049 |  |  | $ | 61,573 |
Denominator: |  |  |  |  |
Basic |  |  |  |  |
Weighted average common shares outstanding | 54,288 |  |  | 54,299 |  |  | 54,561 |
Diluted |  |  |  |  |
Stock options (1) | 802 |  |  | 1,288 |  |  | 1,542 |
Restricted stock awards | 195 |  |  | 234 |  |  | 302 |
Contingent shares (2) | 74 |  |  | 74 |  |  | 82 |
Diluted weighted average common shares outstanding (3) | 55,359 |  |  | 55,895 |  |  | 56,487 |
Earnings Per Share: |  |  |  |  |
Basic earnings per share from continuing operations | $ | 1.44 |  |  | $ | 1.31 |  |  | $ | 1.13 |
Diluted earnings per share from continuing operations | $ | 1.42 |  |  | $ | 1.27 |  |  | $ | 1.09 |
(1)For the years ended December 31, 2020, 2019 and 2018, a total of 0.3 million, 0.5 million and 0.4 million stock based awards, respectively, were excluded from the calculation of diluted earnings per share as their exercise prices would render them 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 conditions have been met. For further details, refer to Note 18, Business Combinations. (3)The denominator used in calculating diluted earnings per share did not include 0.3 million and 0.2 million performance share units for the twelve months ended December 31, 2020 and 2019, respectively. 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 years ended December 31, 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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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