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Earnings Per Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share is computed in accordance with ASC 260, Earnings per Share, based on weighted average outstanding common shares. Diluted earnings per share is computed based on basic weighted average outstanding common shares adjusted for the dilutive effect of stock options, RSUs, and certain contingently issuable shares for which performance targets have been achieved. The following table reconciles the weighted average share amounts used to compute both basic and diluted earnings per share (in thousands):
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Weighted average shares outstanding: |  |  |  |  |
Basic weighted average shares outstanding | 116,175 |  |  | 116,057 |  |  | 118,059 |
Add: Dilutive effect of stock options, RSUs, and contingently issuable shares | 2,396 |  |  | 1,575 |  |  | 1,385 |
Diluted weighted average shares outstanding | 118,571 |  |  | 117,632 |  |  | 119,444 |
The diluted earnings per share computation excludes 1.8 million, 2.2 million, and 3.9 million options to purchase shares, RSUs, and contingently issuable shares during the years ended December 31, 2019, 2018, and 2017, respectively, as their effect would be anti-dilutive. Common stock outstanding as of December 31, 2019 and 2018, was 115,986,352 and 116,123,361, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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