EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||
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Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Basic and Diluted (Loss)/Earnings Per Common Share | ||||||||||||||||||||||||||
| Basic weighted average number of shares outstanding (in shares) | 40,107 | 40,287 | 39,976 | |||||||||||||||||||||||
| Effect of dilutive securities: | ||||||||||||||||||||||||||
| Convertible debt (in shares) | [1] | 0 | 1,311 | 2,176 | ||||||||||||||||||||||
| Stock options and unvested restricted stock (in shares) | 621 | 630 | 433 | |||||||||||||||||||||||
| Diluted average shares outstanding (in shares) | 40,728 | 42,228 | 42,585 | |||||||||||||||||||||||
| Net earnings as reported (in dollars) | $ 75,485 | $ 54,135 | $ 53,838 | $ 43,874 | $ 35,553 | $ 42,550 | $ 41,580 | $ 23,572 | $ 227,332 | $ 143,255 | $ 149,541 | |||||||||||||||
| Interest attributable to convertible senior notes, net of income taxes (in dollars) | 0 | 941 | 1,615 | |||||||||||||||||||||||
| Net earnings for diluted earnings per share (in dollars) | $ 227,332 | $ 144,196 | $ 151,156 | |||||||||||||||||||||||
| Basic earnings per share (in dollars per share) | $ 1.93 | [2] | $ 1.34 | [2] | $ 1.32 | [2] | $ 1.08 | [2] | $ 0.88 | [2] | $ 1.06 | [2] | $ 1.03 | [2] | $ 0.59 | [2] | $ 5.67 | $ 3.56 | $ 3.74 | |||||||
| Diluted earnings per share (in dollars per share) | $ 1.91 | [2] | $ 1.33 | [2] | $ 1.31 | [2] | $ 1.07 | [2] | $ 0.87 | [2] | $ 1.02 | [2] | $ 0.98 | [2] | $ 0.56 | [2] | $ 5.58 | [1] | $ 3.41 | [1] | $ 3.55 | [1] | ||||
| Antidilutive stock options not included in the calculation of diluted earnings per share (in shares) | 8 | 2 | 4 | |||||||||||||||||||||||
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The after-tax amount of interest recognized in the period associated with any convertible debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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