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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2017
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, 2017 and 2016:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(000's omitted, except per share data) |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net income |  | $ | 17,191 |  |  | $ | 25,857 |  |  | $ | 43,448 |  |  | $ | 50,260 |
Income attributable to unvested stock-based compensation awards |  |  | (83 | ) |  |  | (151 | ) |  |  | (219 | ) |  |  | (242 | )
Income available to common shareholders |  | $ | 17,108 |  |  | $ | 25,706 |  |  | $ | 43,229 |  |  | $ | 50,018 |
Weighted-average common shares outstanding – basic |  |  | 48,525 |  |  |  | 44,021 |  |  |  | 46,913 |  |  |  | 43,942 |
Basic earnings per share |  | $ | 0.35 |  |  | $ | 0.58 |  |  | $ | 0.92 |  |  | $ | 1.14 |
Net income |  | $ | 17,191 |  |  | $ | 25,857 |  |  | $ | 43,448 |  |  | $ | 50,260 |
Income attributable to unvested stock-based compensation awards |  |  | (83 | ) |  |  | (151 | ) |  |  | (219 | ) |  |  | (242 | )
Income available to common shareholders |  | $ | 17,108 |  |  | $ | 25,706 |  |  | $ | 43,229 |  |  | $ | 50,018 |
Weighted-average common shares outstanding – basic |  |  | 48,525 |  |  |  | 44,021 |  |  |  | 46,913 |  |  |  | 43,942 |
Assumed exercise of stock options |  |  | 626 |  |  |  | 357 |  |  |  | 665 |  |  |  | 347 |
Weighted-average common shares outstanding – diluted |  |  | 49,151 |  |  |  | 44,378 |  |  |  | 47,578 |  |  |  | 44,289 |
Diluted earnings per share |  | $ | 0.35 |  |  | $ | 0.58 |  |  | $ | 0.91 |  |  | $ | 1.13 |

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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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