Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Revenues | $ 217,371 | $ 205,375 | $ 196,982 | $ 167,410 | $ 211,133 | $ 204,744 | $ 166,665 | $ 134,610 | $ 787,138 | $ 717,152 | $ 651,227 |
| Gross profit | 49,201 | 46,162 | 42,776 | 35,473 | 41,459 | 41,367 | 35,408 | 25,924 | 173,612 | 144,158 | 134,344 |
| Net income attributable to common shareholders | $ 11,593 | $ 10,701 | $ 8,702 | $ 6,988 | $ 23,811 | $ 8,493 | $ 5,831 | $ (644) | $ 37,984 | $ 37,491 | $ 12,032 |
| Net income (loss) per share attributable to common shareholders: | |||||||||||
| Basic (in usd per share) | $ 0.25 | $ 0.23 | $ 0.19 | $ 0.15 | $ 0.52 | $ 0.19 | $ 0.13 | $ (0.01) | $ 0.83 | $ 0.82 | $ 0.26 |
| Diluted (in usd per share) | $ 0.24 | $ 0.23 | $ 0.19 | $ 0.15 | $ 0.52 | $ 0.19 | $ 0.13 | $ (0.01) | $ 0.81 | $ 0.82 | $ 0.26 |
| Weighted average common shares outstanding: | |||||||||||
| Basic (in shares) | 46,114 | 45,854 | 45,470 | 45,373 | 45,537 | 45,524 | 45,463 | 45,514 | 45,729 | 45,509 | 46,409 |
| Diluted (in shares) | 47,327 | 46,944 | 46,406 | 45,994 | 45,957 | 45,771 | 45,675 | 45,514 | 46,831 | 45,748 | 46,493 |
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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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- 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 Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. 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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- References No definition available.
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. 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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- References No definition available.
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