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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share from Continuing Operations | 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, 2018, 2017 and 2016 (in thousands, except per share data):
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 61,573 |  |  | $ | 51,032 |  |  | $ | 40,607 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 54,561 |  |  |  | 53,862 |  |  |  | 52,321 |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Stock options (1) |  |  | 1,542 |  |  |  | 1,499 |  |  |  | 870 |
Restricted stock awards |  |  | 302 |  |  |  | 328 |  |  |  | 261 |
Contingent shares (2) |  |  | 82 |  |  |  | — |  |  |  | 61 |
Diluted weighted average common shares outstanding |  |  | 56,487 |  |  |  | 55,689 |  |  |  | 53,513 |
Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share from continuing operations |  | $ | 1.13 |  |  | $ | 0.95 |  |  | $ | 0.78 |
Diluted earnings per share from continuing operations |  | $ | 1.09 |  |  | $ | 0.92 |  |  | $ | 0.76 |
(1) | For the years ended December 31, 2018, 2017 and 2016, a total of 0.4 million, 0.5 million and 0.8 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 19, Acquisitions.

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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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