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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2015
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, 2015 and 2014:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
(000's omitted, except per share data) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Net income |  | $ | 25,022 |  |  | $ | 22,371 |  |  | $ | 71,159 |  |  | $ | 68,220 |
Income attributable to unvested stock-based compensation awards |  |  | (129 | ) |  |  | (115 | ) |  |  | (352 | ) |  |  | (337 | )
Income available to common shareholders |  |  | 24,893 |  |  |  | 22,256 |  |  |  | 70,807 |  |  |  | 67,883 |
Weighted-average common shares outstanding – basic |  |  | 40,873 |  |  |  | 40,596 |  |  |  | 40,741 |  |  |  | 40,543 |
Basic earnings per share |  | $ | 0.61 |  |  | $ | 0.55 |  |  | $ | 1.74 |  |  | $ | 1.67 |
Net income |  | $ | 25,022 |  |  | $ | 22,371 |  |  | $ | 71,159 |  |  | $ | 68,220 |
Income attributable to unvested stock-based compensation awards |  |  | (129 | ) |  |  | (115 | ) |  |  | (352 | ) |  |  | (337 | )
Income available to common shareholders |  |  | 24,893 |  |  |  | 22,256 |  |  |  | 70,807 |  |  |  | 67,883 |
Weighted-average common shares outstanding – basic |  |  | 40,873 |  |  |  | 40,596 |  |  |  | 40,741 |  |  |  | 40,543 |
Assumed exercise of stock options |  |  | 386 |  |  |  | 453 |  |  |  | 400 |  |  |  | 482 |
Weighted-average common shares outstanding – diluted |  |  | 41,259 |  |  |  | 41,049 |  |  |  | 41,141 |  |  |  | 41,025 |
Diluted earnings per share |  | $ | 0.60 |  |  | $ | 0.54 |  |  | $ | 1.72 |  |  | $ | 1.65 |

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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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