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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) | Note 21. Quarterly Financial Data (Unaudited) The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2018 and 2017 (in thousands, except per share amounts).
|  | 2018 |
|  | March 31, |  |  | June 30, |  |  | September 30, |  |  | December 31, |
Revenue |  | $ | 266,090 |  |  | $ | 232,641 |  |  | $ | 224,249 |  |  | $ | 199,023 |
Operating expenses |  |  | 204,750 |  |  |  | 205,102 |  |  |  | 198,607 |  |  |  | 181,824 |
Gross margin |  |  | 61,340 |  |  |  | 27,539 |  |  |  | 25,642 |  |  |  | 17,199 |
Corporate general and administrative expenses |  |  | 10,028 |  |  |  | 9,993 |  |  |  | 10,279 |  |  |  | 8,873 |
Operating income |  |  | 51,312 |  |  |  | 17,546 |  |  |  | 15,363 |  |  |  | 8,326 |
Other (expense) income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  | (1,780 | ) |  |  | (1,817 | ) |  |  | (1,614 | ) |  |  | (1,434 | )
Gain on sale of operations, net |  |  | 663 |  |  |  | — |  |  |  | — |  |  |  | 362 |
Other (expense) income, net |  |  | (1,229 | ) |  |  | 630 |  |  |  | 3,143 |  |  |  | (9,631 | )
Total other (expense) income, net |  |  | (2,346 | ) |  |  | (1,187 | ) |  |  | 1,529 |  |  |  | (10,703 | )
Income (loss) from continuing operations before income tax expense |  |  | 48,966 |  |  |  | 16,359 |  |  |  | 16,892 |  |  |  | (2,377 | )
Income tax expense (benefit) |  |  | 13,156 |  |  |  | 3,238 |  |  |  | 3,297 |  |  |  | (1,424 | )
Income (loss) from continuing operations |  |  | 35,810 |  |  |  | 13,121 |  |  |  | 13,595 |  |  |  | (953 | )
Gain (loss) from operations of discontinued operations, net of tax |  |  | 41 |  |  |  | (15 | ) |  |  | (9 | ) |  |  | (20 | )
Net income (loss) |  | $ | 35,851 |  |  | $ | 13,106 |  |  | $ | 13,586 |  |  | $ | (973 | )
Earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.66 |  |  | $ | 0.24 |  |  | $ | 0.25 |  |  | $ | (0.02 | )
Discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net income (loss) |  | $ | 0.66 |  |  | $ | 0.24 |  |  | $ | 0.25 |  |  | $ | (0.02 | )
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.64 |  |  | $ | 0.23 |  |  | $ | 0.24 |  |  | $ | (0.02 | )
Discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net income (loss) |  | $ | 0.64 |  |  | $ | 0.23 |  |  | $ | 0.24 |  |  | $ | (0.02 | )
Basic weighted average common shares |  |  | 54,071 |  |  |  | 54,594 |  |  |  | 54,794 |  |  |  | 54,775 |
Diluted weighted average common shares |  |  | 55,924 |  |  |  | 56,437 |  |  |  | 56,740 |  |  |  | 56,580 |
|  | 2017 |
|  | March 31, |  |  | June 30, |  |  | September 30, |  |  | December 31, |
Revenue |  | $ | 241,459 |  |  | $ | 211,016 |  |  | $ | 207,723 |  |  | $ | 195,142 |
Operating expenses |  |  | 192,766 |  |  |  | 188,120 |  |  |  | 184,723 |  |  |  | 189,975 |
Gross margin |  |  | 48,693 |  |  |  | 22,896 |  |  |  | 23,000 |  |  |  | 5,167 |
Corporate general and administrative expenses |  |  | 8,768 |  |  |  | 9,232 |  |  |  | 7,979 |  |  |  | 7,316 |
Operating income (loss) |  |  | 39,925 |  |  |  | 13,664 |  |  |  | 15,021 |  |  |  | (2,149 | )
Other income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  | (1,517 | ) |  |  | (1,692 | ) |  |  | (1,777 | ) |  |  | (1,689 | )
Gain on sale of operations, net |  |  | 22 |  |  |  | 23 |  |  |  | — |  |  |  | — |
Other income, net |  |  | 2,737 |  |  |  | 3,764 |  |  |  | 2,792 |  |  |  | 5,196 |
Total other income, net |  |  | 1,242 |  |  |  | 2,095 |  |  |  | 1,015 |  |  |  | 3,507 |
Income from continuing operations before income tax expense |  |  | 41,167 |  |  |  | 15,759 |  |  |  | 16,036 |  |  |  | 1,358 |
Income tax expense (benefit) |  |  | 16,141 |  |  |  | 4,343 |  |  |  | 6,172 |  |  |  | (3,368 | )
Income from continuing operations |  |  | 25,026 |  |  |  | 11,416 |  |  |  | 9,864 |  |  |  | 4,726 |
(Loss) gain from operations of discontinued operations, net of tax |  |  | (152 | ) |  |  | (418 | ) |  |  | (206 | ) |  |  | 121 |
Net income |  | $ | 24,874 |  |  | $ | 10,998 |  |  | $ | 9,658 |  |  | $ | 4,847 |
Earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.47 |  |  | $ | 0.21 |  |  | $ | 0.18 |  |  | $ | 0.09 |
Discontinued operations |  |  | — |  |  |  | (0.01 | ) |  |  | — |  |  |  | — |
Net income |  | $ | 0.47 |  |  | $ | 0.20 |  |  | $ | 0.18 |  |  | $ | 0.09 |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.45 |  |  | $ | 0.20 |  |  | $ | 0.18 |  |  | $ | 0.08 |
Discontinued operations |  |  | — |  |  |  | (0.01 | ) |  |  | — |  |  |  | — |
Net income |  | $ | 0.45 |  |  | $ | 0.19 |  |  | $ | 0.18 |  |  | $ | 0.08 |
Basic weighted average common shares |  |  | 53,293 |  |  |  | 53,968 |  |  |  | 54,142 |  |  |  | 54,034 |
Diluted weighted average common shares |  |  | 55,214 |  |  |  | 55,831 |  |  |  | 55,827 |  |  |  | 55,822 |

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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