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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2019
EARNINGS PER SHARE [Abstract] |
Reconciliation of Basic to Diluted Earnings per Share | The following is a reconciliation of basic to diluted earnings per share for the three and six months ended June 30, 2019 and 2018:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(000's omitted, except per share data) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Net income |  | $ | 45,015 |  |  | $ | 44,606 |  |  | $ | 86,961 |  |  | $ | 84,712 |
Income attributable to unvested stock-based compensation awards |  |  | (146 | ) |  |  | (188 | ) |  |  | (255 | ) |  |  | (353 | )
Income available to common shareholders |  | $ | 44,869 |  |  | $ | 44,418 |  |  | $ | 86,706 |  |  | $ | 84,359 |
Weighted-average common shares outstanding – basic |  |  | 51,659 |  |  |  | 51,140 |  |  |  | 51,590 |  |  |  | 51,037 |
Basic earnings per share |  | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 1.68 |  |  | $ | 1.65 |
Net income |  | $ | 45,015 |  |  | $ | 44,606 |  |  | $ | 86,961 |  |  | $ | 84,712 |
Income attributable to unvested stock-based compensation awards |  |  | (146 | ) |  |  | (188 | ) |  |  | (255 | ) |  |  | (353 | )
Income available to common shareholders |  | $ | 44,869 |  |  | $ | 44,418 |  |  | $ | 86,706 |  |  | $ | 84,359 |
Weighted-average common shares outstanding – basic |  |  | 51,659 |  |  |  | 51,140 |  |  |  | 51,590 |  |  |  | 51,037 |
Assumed exercise of stock options |  |  | 529 |  |  |  | 583 |  |  |  | 535 |  |  |  | 576 |
Weighted-average common shares outstanding – diluted |  |  | 52,188 |  |  |  | 51,723 |  |  |  | 52,125 |  |  |  | 51,613 |
Diluted earnings per share |  | $ | 0.86 |  |  | $ | 0.86 |  |  | $ | 1.66 |  |  | $ | 1.63 |

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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://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=6371337&loc=d3e3550-109257 + Details
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