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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Earnings per Common Share | Basic and diluted earnings per common share were calculated as follows (in thousands, except per share amounts):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Basic weighted average number of shares outstanding |  | 40,012 |  |  | 39,648 |  |  | 39,926 |  |  | 39,520 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Convertible senior notes (1) |  | 2,176 |  |  | 2,176 |  |  | 2,176 |  |  | 2,176 |
Stock options and unvested restricted stock |  | 345 |  |  | 321 |  |  | 375 |  |  | 383 |
Diluted average shares outstanding |  | 42,533 |  |  | 42,145 |  |  | 42,477 |  |  | 42,079 |
Net earnings as reported |  | $ | 39,878 |  |  | $ | 29,133 |  |  | $ | 60,847 |  |  | $ | 45,533 |
Interest attributable to convertible senior notes, net of income taxes |  | 400 |  |  | 386 |  |  | 801 |  |  | 771 |
Net earnings for diluted earnings per share |  | $ | 40,278 |  |  | $ | 29,519 |  |  | $ | 61,648 |  |  | $ | 46,304 |
Basic earnings per share |  | $ | 1.00 |  |  | $ | 0.73 |  |  | $ | 1.52 |  |  | $ | 1.15 |
Diluted earnings per share (1) |  | $ | 0.95 |  |  | $ | 0.70 |  |  | $ | 1.45 |  |  | $ | 1.10 |
Antidilutive stock options not included in the calculation of diluted earnings per share |  | 289 |  |  | 14 |  |  | 19 |  |  | 7 |
(1) | In accordance with ASC 260-10, Earnings Per Share, ("ASC 260-10") we calculate the dilutive effect of convertible securities using the "if-converted" method.

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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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