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EARNINGS PER SHARE (Tables) | 3 Months Ended
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Mar. 31, 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 months ended March 31, 2019 and 2018:
|  | Three Months Ended March 31, |
(000's omitted, except per share data) |  | 2019 |  |  | 2018 |
Net income |  | $ | 41,946 |  |  | $ | 40,106 |
Income attributable to unvested stock-based compensation awards |  |  | (109 | ) |  |  | (141 | )
Income available to common shareholders |  | $ | 41,837 |  |  | $ | 39,965 |
Weighted-average common shares outstanding – basic |  |  | 51,520 |  |  |  | 50,934 |
Basic earnings per share |  | $ | 0.81 |  |  | $ | 0.78 |
Net income |  | $ | 41,946 |  |  | $ | 40,106 |
Income attributable to unvested stock-based compensation awards |  |  | (109 | ) |  |  | (141 | )
Income available to common shareholders |  | $ | 41,837 |  |  | $ | 39,965 |
Weighted-average common shares outstanding |  |  | 51,520 |  |  |  | 50,934 |
Assumed exercise of stock options |  |  | 541 |  |  |  | 563 |
Weighted-average common shares outstanding – diluted |  |  | 52,061 |  |  |  | 51,497 |
Diluted earnings per share |  | $ | 0.80 |  |  | $ | 0.78 |

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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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