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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2022
Basic and Diluted Weighted Average Shares Outstanding | A reconciliation of basic and diluted weighted average shares outstanding is as follows:
|  | Three Months Ended March 31, |
|  | 2022 |  |  | 2021 |
|  | (Amounts in thousands, except per share data) |
Numerator: |  |  |  |  |  |
Net income |  | $ | 46,964 |  |  | $ | 29,450 |
Effect of dilutive securities: |  |  |  |  |  |
Charges associated with convertible debt instruments, net of tax |  |  | 387 |  |  |  | — |
Numerator for diluted earnings per share - net income available to common stockholders after the effect of dilutive securities |  | $ | 47,351 |  |  | $ | 29,450 |
Denominator: |  |  |  |  |  |
Weighted average shares used in computing net income per share - basic |  |  | 55,353 |  |  |  | 54,805 |
Effect of dilutive shares: |  |  |  |  |  |
Options and stock units |  |  | 726 |  |  |  | 964 |
Convertible Senior Notes |  |  | 2,726 |  |  |  | 1,092 |
Dilutive effect of unvested performance stock units |  |  | 11 |  |  |  | 8 |
Dilutive potential common shares |  |  | 3,463 |  |  |  | 2,064 |
Denominator for diluted earnings per share - adjusted weighted average shares used in computing net income per share - diluted |  |  | 58,816 |  |  |  | 56,869 |
Earnings per share: |  |  |  |  |  |
Basic |  | $ | 0.85 |  |  | $ | 0.54 |
Diluted |  | $ | 0.81 |  |  | $ | 0.52 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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=124432515&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration