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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Reconciliation of Basic and Diluted Earnings Per Share | The reconciliation of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 is as follows:
| Three Months Ended
| September 30, 2021 |  | September 30, 2020
| Diluted |  | Basic |  | Diluted |  | Basic
Consolidated operations |  |  |  |  |  |  |
Income available to common stockholders | $ | 47,260 |  |  | $ | 47,260 |  |  | $ | 63,716 |  |  | $ | 63,716 |
Average equivalent shares |  |  |  |  |  |  |
Shares of common stock | 65,900 |  |  | 65,900 |  |  | 64,562 |  |  | 64,562 |
Effect of dilutive stock-based compensation |  |  |  |  |  |  |
Stock options | 1,464 |  |  | — |  |  | 1,809 |  |  | — |
Restricted stock | 437 |  |  | — |  |  | 551 |  |  | — |
Total average equivalent shares | 67,801 |  |  | 65,900 |  |  | 66,922 |  |  | 64,562 |
Net income per share | $ | 0.70 |  |  | $ | 0.72 |  |  | $ | 0.95 |  |  | $ | 0.99 |
| Nine Months Ended
| September 30, 2021 |  | September 30, 2020
| Diluted |  | Basic |  | Diluted |  | Basic
Consolidated operations |  |  |  |  |  |  |
Income available to common stockholders | $ | 186,488 |  |  | $ | 186,488 |  |  | $ | 160,808 |  |  | $ | 160,808 |
Average equivalent shares |  |  |  |  |  |  |
Shares of common stock | 65,652 |  |  | 65,652 |  |  | 64,278 |  |  | 64,278 |
Effect of dilutive stock-based compensation |  |  |  |  |  |  |
Stock options | 1,688 |  |  | — |  | 1,770 |  |  | —
Restricted stock | 459 |  |  | — |  | 435 |  |  | —
Total average equivalent shares | 67,799 |  |  | 65,652 |  |  | 66,483 |  |  | 64,278 |
Net income per share | $ | 2.75 |  |  | $ | 2.84 |  |  | $ | 2.42 |  |  | $ | 2.50 |

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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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