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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2019
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):
|  | Years Ended December 31, |  |  |  |
|  | 2019 |  | 2018 |  | 2017
Basic weighted average number of shares outstanding |  | 38,100 |  |  | 40,107 |  |  | 40,287 |
Effect of dilutive securities: |  |  |  |  |  |
Convertible debt (1) |  | — |  |  | — |  |  | 1,311 |
Stock options and unvested restricted stock |  | 791 |  |  | 621 |  |  | 630 |
Diluted average shares outstanding |  | 38,891 |  |  | 40,728 |  |  | 42,228 |
Net earnings as reported |  | $ | 249,663 |  |  | $ | 227,332 |  |  | $ | 143,255 |
Interest attributable to convertible senior notes, net of income taxes |  | — |  |  | — |  |  | 941 |
Net earnings for diluted earnings per share |  | $ | 249,663 |  |  | $ | 227,332 |  |  | $ | 144,196 |
Basic earnings per share |  | $ | 6.55 |  |  | $ | 5.67 |  |  | $ | 3.56 |
Diluted earnings per share (1) |  | $ | 6.42 |  |  | $ | 5.58 |  |  | $ | 3.41 |
(1)In accordance with ASC 260-10, Earnings Per Share, we calculated the dilutive effect of convertible securities using the "if-converted" method based on the number of days the Convertible Notes were outstanding during the 2018 period. All of the Convertible Notes were retired in 2017.

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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://fasb.org/us-gaap/role/ref/legacyRef -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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