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Earnings per Share Earnings per Share (Tables) | 9 Months Ended
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Sep. 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 nine months ended September 30, 2021 and 2020:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
(In thousands, except per share amounts) | 2021 |  | 2020 |  | 2021 |  | 2020
NUMERATOR |  |  |  |  |  |  |
Net income | $ | 91,012 |  |  | $ | 73,537 |  |  | $ | 283,485 |  |  | $ | 159,791 |
DENOMINATOR |  |  |  |  |  |  |
Basic weighted average shares outstanding | 29,250 |  |  | 28,653 |  |  | 29,179 |  |  | 28,554 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock option awards | 447 |  |  | 376 |  |  | 474 |  |  | 253 |
Deferred compensation awards | 331 |  |  | 257 |  |  | 313 |  |  | 223 |
Diluted weighted average shares outstanding | $ | 30,028 |  |  | $ | 29,286 |  |  | $ | 29,966 |  |  | $ | 29,030 |
Earnings per common share: |  |  |  |  |  |  |
Basic | $ | 3.11 |  |  | $ | 2.57 |  |  | $ | 9.72 |  |  | $ | 5.60 |
Diluted | $ | 3.03 |  |  | $ | 2.51 |  |  | $ | 9.46 |  |  | $ | 5.50 |
Anti-dilutive equity awards not included in the calculation of diluted earnings per common share | 16 |  |  | 435 |  |  | 7 |  |  | 360 |

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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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