Income Per Share - Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2015 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Income from continuing operations | $ 104,991 | $ 31,393 | $ 23,460 | $ (1,710) | $ 21,307 | $ 24,566 | $ 15,615 | $ 11,116 | $ 158,133 | $ 72,606 | $ 79,123 | |
| Loss from discontinued operations, net | (152) | |||||||||||
| Net income | $ 104,991 | $ 31,393 | $ 23,460 | $ (1,710) | $ 21,307 | $ 24,566 | $ 15,615 | $ 11,116 | $ 158,133 | $ 72,606 | $ 78,971 | |
| Weighted average number of common shares outstanding - basic | 35,897,641 | 37,585,777 | 37,674,913 | |||||||||
| Dilutive effect of common stock equivalents: | ||||||||||||
| Stock options | 267,939 | 60,423 | 12,274 | |||||||||
| Weighted average number of common shares outstanding - diluted | 36,572,146 | 37,867,212 | 37,780,875 | |||||||||
| Basic income per common share: | ||||||||||||
| Income from continuing operations | $ 3.00 | $ 0.90 | $ 0.64 | $ (0.05) | $ 0.57 | $ 0.65 | $ 0.41 | $ 0.29 | $ 4.41 | $ 1.93 | $ 2.10 | |
| Net income | 3.00 | 0.90 | 0.64 | (0.05) | 0.57 | 0.65 | 0.41 | 0.29 | 4.41 | 1.93 | 2.10 | |
| Diluted income per common share: | ||||||||||||
| Income from continuing operations | 2.93 | 0.88 | 0.63 | (0.05) | 0.57 | 0.65 | 0.41 | 0.29 | 4.32 | 1.92 | 2.09 | |
| Net income | $ 2.93 | $ 0.88 | $ 0.63 | $ (0.05) | $ 0.57 | $ 0.65 | $ 0.41 | $ 0.29 | $ 4.32 | $ 1.92 | $ 2.09 | |
| Other disclosures | ||||||||||||
| Issuance of common stock in conjunction with the Separation (in shares) | 37,700,000 | |||||||||||
| Service-based conditions | ||||||||||||
| Dilutive effect of common stock equivalents: | ||||||||||||
| Restricted stock awards | 221,497 | 192,705 | 93,688 | |||||||||
| Market-based conditions | ||||||||||||
| Dilutive effect of common stock equivalents: | ||||||||||||
| Restricted stock awards | 185,069 | 28,307 | ||||||||||
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of restricted stock awards using the treasury stock method. No definition available.
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of stock options using the treasury stock method. 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/presentationRef
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- References No definition available.
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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/presentationRef
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- References No definition available.
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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of net income (loss) derived from continuing operations during 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/presentationRef
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- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/presentationRef
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- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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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://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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