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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 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 six months ended June 30, 2015 and 2014:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(000's omitted, except per share data) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Net income |  | $ | 23,840 |  |  | $ | 23,676 |  |  | $ | 46,137 |  |  | $ | 45,850 |
Income attributable to unvested stock-based compensation awards |  |  | (99 | ) |  |  | (123 | ) |  |  | (177 | ) |  |  | (221 | )
Income available to common shareholders |  | $ | 23,741 |  |  | $ | 23,553 |  |  | $ | 45,960 |  |  | $ | 45,629 |
Weighted-average common shares outstanding – basic |  |  | 40,690 |  |  |  | 40,574 |  |  |  | 40,674 |  |  |  | 40,517 |
Basic earnings per share |  | $ | 0.58 |  |  | $ | 0.58 |  |  | $ | 1.13 |  |  | $ | 1.13 |
Net income |  | $ | 23,840 |  |  | $ | 23,676 |  |  | $ | 46,137 |  |  | $ | 45,850 |
Income attributable to unvested stock-based compensation awards |  |  | (99 | ) |  |  | (123 | ) |  |  | (177 | ) |  |  | (221 | )
Income available to common shareholders |  | $ | 23,741 |  |  | $ | 23,553 |  |  | $ | 45,960 |  |  | $ | 45,629 |
Weighted-average common shares outstanding – basic |  |  | 40,690 |  |  |  | 40,574 |  |  |  | 40,674 |  |  |  | 40,517 |
Assumed exercise of stock options |  |  | 404 |  |  |  | 484 |  |  |  | 405 |  |  |  | 497 |
Weighted-average common shares outstanding – diluted |  |  | 41,094 |  |  |  | 41,058 |  |  |  | 41,079 |  |  |  | 41,014 |
Diluted earnings per share |  | $ | 0.58 |  |  | $ | 0.57 |  |  | $ | 1.12 |  |  | $ | 1.11 |

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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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