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Earnings per Share Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The table below presents a reconciliation between basic and diluted weighted average shares outstanding, net income, and basic and diluted income per share for the three and six months ended June 30, 2021 and 2020:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
(In thousands, except per share amounts) | 2021 |  | 2020 |  | 2021 |  | 2020
NUMERATOR |  |  |  |  |  |  |
Net income | $ | 107,607 |  |  | $ | 54,508 |  |  | $ | 192,473 |  |  | $ | 86,254 |
DENOMINATOR |  |  |  |  |  |  |
Basic weighted average shares outstanding | 29,271 |  |  | 28,531 |  |  | 29,144 |  |  | 28,504 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock option awards | 512 |  |  | 115 |  |  | 487 |  |  | 210 |
Deferred compensation awards | 310 |  |  | 190 |  |  | 304 |  |  | 206 |
Diluted weighted average shares outstanding | $ | 30,093 |  |  | $ | 28,836 |  |  | $ | 29,935 |  |  | $ | 28,920 |
Earnings per common share: |  |  |  |  |  |  |
Basic | $ | 3.68 |  |  | $ | 1.91 |  |  | $ | 6.60 |  |  | $ | 3.03 |
Diluted | $ | 3.58 |  |  | $ | 1.89 |  |  | $ | 6.43 |  |  | $ | 2.98 |
Anti-dilutive equity awards not included in the calculation of diluted earnings per common share | 6 |  |  | 1,178 |  |  | 3 |  |  | 676 |

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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=124432515&loc=d3e3550-109257 + Details
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