Earnings per Share - Summary of Calculation of the Weighted Average Number of Diluted Common Shares Outstanding and the Calculation of Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Numerator | ||||
| Net income attributable to common stockholders | $ 11,248 | $ 2,800 | $ 22,244 | $ 7,361 |
| Denominator | ||||
| Weighted average number of basic common shares outstanding | 41,717,024 | 41,502,490 | 41,704,071 | 41,502,490 |
| Effect of dilutive securities: | ||||
| Weighted average number of diluted common shares outstanding: | 41,910,122 | 41,505,180 | 41,874,442 | 41,502,490 |
| Net income per diluted common share attributable to common stockholders | $ 0.27 | $ 0.07 | $ 0.53 | $ 0.18 |
| 2016 Equity Incentive Plan Options [Member] | ||||
| Effect of dilutive securities: | ||||
| Dilutive options | 2,690 | |||
| 2010 Non-Plan Stock Options Agreement Options [Member] | ||||
| Effect of dilutive securities: | ||||
| Dilutive options | 193,098 | 170,371 | ||
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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 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://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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- References No definition available.
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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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