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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2018
EARNINGS PER SHARE |
Reconciliation of Basic and Diluted Earnings Per Share |
|  | Three Months Ended |
|  | June 30, 2018 |  | June 30, 2017 |
|  | Diluted |  | Basic |  | Diluted |  | Basic |
Consolidated operations |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 55,775 |  | $ | 55,775 |  | $ | 65,174 |  | $ | 65,174 |
Average equivalent shares |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock |  |  | 62,402 |  |  | 62,402 |  |  | 62,631 |  |  | 62,631 |
Effect of dilutive stock based compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 2,358 |  |  | — |  |  | 2,144 |  |  | — |
Restricted stock |  |  | 90 |  |  | — |  |  | 53 |  |  | — |
Total average equivalent shares |  |  | 64,850 |  |  | 62,402 |  |  | 64,828 |  |  | 62,631 |
Net income per share |  | $ | 0.86 |  | $ | 0.89 |  | $ | 1.01 |  | $ | 1.04 |
|  | Six Months Ended |
|  | June 30, 2018 |  | June 30, 2017 |
|  | Diluted |  | Basic |  | Diluted |  | Basic |
Consolidated operations |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 115,075 |  | $ | 115,075 |  | $ | 116,994 |  | $ | 116,994 |
Average equivalent shares |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock |  |  | 62,266 |  |  | 62,266 |  |  | 62,494 |  |  | 62,494 |
Effect of dilutive stock-based compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 2,293 |  |  | — |  |  | 1,973 |  |  | — |
Restricted stock |  |  | 81 |  |  | — |  |  | 52 |  |  | — |
Total average equivalent shares |  |  | 64,640 |  |  | 62,266 |  |  | 64,519 |  |  | 62,494 |
Net income per share |  | $ | 1.78 |  | $ | 1.85 |  | $ | 1.81 |  | $ | 1.87 |

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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