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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) | QUARTERLY FINANCIAL DATA (UNAUDITED) The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2020 and 2019 (in thousands, except per share amounts).
| 2020
| March 31, |  | June 30, |  | September 30, |  | December 31,
Revenue | $ | 277,455 |  |  | $ | 236,943 |  |  | $ | 238,389 |  |  | $ | 211,110 |
Operating expenses | 199,827 |  |  | 209,016 |  |  | 204,760 |  |  | 211,748 |
Gross margin | 77,628 |  |  | 27,927 |  |  | 33,629 |  |  | (638) |
Corporate general and administrative expenses | 10,489 |  |  | 11,160 |  |  | 11,339 |  |  | 13,078 |
Operating income (loss) | 67,139 |  |  | 16,767 |  |  | 22,290 |  |  | (13,716) |
Other (expense) income: |  |  |  |  |  |  |
Interest expense | (1,119) |  |  | (2,074) |  |  | (974) |  |  | (816) |
Gain (loss) on sale of operations, net | 95 |  |  | 57 |  |  | (74) |  |  | (587) |
Other (expense) income, net | (15,800) |  |  | 13,336 |  |  | 5,914 |  |  | 13,050 |
Total other (expense) income, net | (16,824) |  |  | 11,319 |  |  | 4,866 |  |  | 11,647 |
Income (loss) from continuing operations before income tax expense | 50,315 |  |  | 28,086 |  |  | 27,156 |  |  | (2,069) |
Income tax expense (benefit) | 13,453 |  |  | 6,607 |  |  | 7,060 |  |  | (1,979) |
Income (loss) from continuing operations | 36,862 |  |  | 21,479 |  |  | 20,096 |  |  | (90) |
Loss from operations of discontinued operations, net of tax | (14) |  |  | (11) |  |  | (19) |  |  | (4) |
Net income (loss) | $ | 36,848 |  |  | $ | 21,468 |  |  | $ | 20,077 |  |  | $ | (94) |
Earnings (loss) per share: |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |
Continuing operations | $ | 0.68 |  |  | $ | 0.40 |  |  | $ | 0.37 |  |  | $ | — |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |
Net income (loss) | $ | 0.68 |  |  | $ | 0.40 |  |  | $ | 0.37 |  |  | $ | — |
Diluted: |  |  |  |  |  |  |
Continuing operations | $ | 0.66 |  |  | $ | 0.39 |  |  | $ | 0.36 |  |  | $ | — |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |
Net income (loss) | $ | 0.66 |  |  | $ | 0.39 |  |  | $ | 0.36 |  |  | $ | — |
Basic weighted average common shares | 54,571 |  |  | 54,142 |  |  | 54,403 |  |  | 54,039 |
Diluted weighted average common shares | 55,945 |  |  | 55,116 |  |  | 55,360 |  |  | 54,039 |
| 2019
| March 31, |  | June 30, |  | September 30, |  | December 31,
Revenue | $ | 269,998 |  |  | $ | 235,498 |  |  | $ | 239,790 |  |  | $ | 203,138 |
Operating expenses | 215,496 |  |  | 198,148 |  |  | 209,146 |  |  | 200,706 |
Gross margin | 54,502 |  |  | 37,350 |  |  | 30,644 |  |  | 2,432 |
Corporate general and administrative expenses | 11,680 |  |  | 10,566 |  |  | 11,670 |  |  | 10,490 |
Operating income (loss) | 42,822 |  |  | 26,784 |  |  | 18,974 |  |  | (8,058) |
Other income (expense): |  |  |  |  |  |  |
Interest expense | (1,401) |  |  | (1,587) |  |  | (1,521) |  |  | (1,256) |
Gain (loss) on sale of operations, net | 497 |  |  | 50 |  |  | (145) |  |  | 15 |
Other income (expense), net | 9,260 |  |  | (3,311) |  |  | 6,767 |  |  | 4,999 |
Total other income (expense), net | 8,356 |  |  | (4,848) |  |  | 5,101 |  |  | 3,758 |
Income (loss) from continuing operations before income tax expense | 51,178 |  |  | 21,936 |  |  | 24,075 |  |  | (4,300) |
Income tax expense (benefit) | 13,613 |  |  | 5,322 |  |  | 6,069 |  |  | (3,164) |
Income (loss) from continuing operations | 37,565 |  |  | 16,614 |  |  | 18,006 |  |  | (1,136) |
Loss from operations of discontinued operations, net of tax | (96) |  |  | (22) |  |  | (200) |  |  | (17) |
Net income (loss) | $ | 37,469 |  |  | $ | 16,592 |  |  | $ | 17,806 |  |  | $ | (1,153) |
Earnings (loss) per share: |  |  |  |  |  |  |
Basic: |  |  |  |  |  |  |
Continuing operations | $ | 0.69 |  |  | $ | 0.31 |  |  | $ | 0.33 |  |  | $ | (0.02) |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |
Net income (loss) | $ | 0.69 |  |  | $ | 0.31 |  |  | $ | 0.33 |  |  | $ | (0.02) |
Diluted: |  |  |  |  |  |  |
Continuing operations | $ | 0.67 |  |  | $ | 0.30 |  |  | $ | 0.32 |  |  | $ | (0.02) |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |
Net income (loss) | $ | 0.67 |  |  | $ | 0.30 |  |  | $ | 0.32 |  |  | $ | (0.02) |
Basic weighted average common shares | 54,287 |  |  | 54,090 |  |  | 54,268 |  |  | 54,547 |
Diluted weighted average common shares | 55,915 |  |  | 55,495 |  |  | 55,816 |  |  | 54,547 |
Quarterly earnings per share amounts do not always add to the full-year amounts due to the averaging of common shares outstanding.

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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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