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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE Basic and diluted earnings per common share were calculated as follows (in thousands, except per share amounts):
|  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Basic weighted average number of shares outstanding |  | 40,107 |  |  | 40,287 |  |  | 39,976 |
Effect of dilutive securities: |  |  |  |  |  |
Convertible debt (1) |  | — |  |  | 1,311 |  |  | 2,176 |
Stock options and unvested restricted stock |  | 621 |  |  | 630 |  |  | 433 |
Diluted average shares outstanding |  | 40,728 |  |  | 42,228 |  |  | 42,585 |
Net earnings as reported |  | $ | 227,332 |  |  | $ | 143,255 |  |  | $ | 149,541 |
Interest attributable to convertible senior notes, net of income taxes |  | — |  |  | 941 |  |  | 1,615 |
Net earnings for diluted earnings per share |  | $ | 227,332 |  |  | $ | 144,196 |  |  | $ | 151,156 |
Basic earnings per share |  | $ | 5.67 |  |  | $ | 3.56 |  |  | $ | 3.74 |
Diluted earnings per share (1) |  | $ | 5.58 |  |  | $ | 3.41 |  |  | $ | 3.55 |
Antidilutive securities not included in the calculation of diluted earnings per share |  | 8 |  |  | 2 |  |  | 4 |
(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 based on the number of days the Convertible Notes were outstanding during the period. All of the Convertible Notes were retired in 2017.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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