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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2016
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 nine months ended September 30, 2016 and 2015:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(000's omitted, except per share data) |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Net income |  | $ | 27,160 |  |  | $ | 25,022 |  |  | $ | 77,420 |  |  | $ | 71,159 |
Income attributable to unvested stock-based compensation awards |  |  | (157 | ) |  |  | (129 | ) |  |  | (398 | ) |  |  | (352 | )
Income available to common shareholders |  | $ | 27,003 |  |  | $ | 24,893 |  |  | $ | 77,022 |  |  | $ | 70,807 |
Weighted-average common shares outstanding – basic |  |  | 44,184 |  |  |  | 40,873 |  |  |  | 44,023 |  |  |  | 40,741 |
Basic earnings per share |  | $ | 0.61 |  |  | $ | 0.61 |  |  | $ | 1.75 |  |  | $ | 1.74 |
Net income |  | $ | 27,160 |  |  | $ | 25,022 |  |  | $ | 77,420 |  |  | $ | 71,159 |
Income attributable to unvested stock-based compensation awards |  |  | (157 | ) |  |  | (129 | ) |  |  | (398 | ) |  |  | (352 | )
Income available to common shareholders |  | $ | 27,003 |  |  | $ | 24,893 |  |  | $ | 77,022 |  |  | $ | 70,807 |
Weighted-average common shares outstanding – basic |  |  | 44,184 |  |  |  | 40,873 |  |  |  | 44,023 |  |  |  | 40,741 |
Assumed exercise of stock options |  |  | 394 |  |  |  | 386 |  |  |  | 359 |  |  |  | 400 |
Weighted-average common shares outstanding – diluted |  |  | 44,578 |  |  |  | 41,259 |  |  |  | 44,382 |  |  |  | 41,141 |
Diluted earnings per share |  | $ | 0.61 |  |  | $ | 0.60 |  |  | $ | 1.74 |  |  | $ | 1.72 |

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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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