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Quarterly Financial Summary (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Summary | Summary financial information by quarter is as follows (dollars in thousands, except per share data):
|  | Quarter |  |  | Total |
2020 |  | First (2) |  |  | Second (2) |  |  | Third (2) |  |  | Fourth (2) |  |  | Year |
Revenue |  | $ | 170,994 |  |  | $ | 176,035 |  |  | $ | 169,126 |  |  | $ | 171,159 |  |  | $ | 687,314 |
Operating income |  |  | 37,303 |  |  |  | 37,368 |  |  |  | 32,074 |  |  |  | 36,189 |  |  | $ | 142,934 |
Net income |  |  | 29,106 |  |  |  | 28,167 |  |  |  | 39,940 |  |  |  | 27,051 |  |  | $ | 124,264 |
Net income per share (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.42 |  |  | $ | 0.41 |  |  | $ | 0.58 |  |  | $ | 0.39 |  |  | $ | 1.79 |
Diluted |  | $ | 0.41 |  |  | $ | 0.40 |  |  | $ | 0.56 |  |  | $ | 0.38 |  |  | $ | 1.74 |
|  | Quarter |  |  | Total |
2019 |  | First |  |  | Second (3) |  |  | Third (4) |  |  | Fourth |  |  | Year |
Revenue |  | $ | 157,853 |  |  | $ | 156,441 |  |  | $ | 154,959 |  |  | $ | 158,451 |  |  | $ | 627,704 |
Operating income |  |  | 29,971 |  |  |  | 184 |  |  |  | 24,294 |  |  |  | 32,013 |  |  | $ | 86,462 |
Net income (loss) |  |  | 24,791 |  |  |  | (559 | ) |  |  | 18,234 |  |  |  | 27,516 |  |  | $ | 69,982 |
Net income (loss) per share (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.35 |  |  | $ | (0.01 | ) |  | $ | 0.26 |  |  | $ | 0.39 |  |  | $ | 1.00 |
Diluted |  | $ | 0.35 |  |  | $ | (0.01 | ) |  | $ | 0.25 |  |  | $ | 0.38 |  |  | $ | 0.97 |
(1) | Basic and diluted earnings per share are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly earnings per share amounts may not agree with the annual earnings per share amount for the corresponding year.
For the year ended December 31, 2020, quarterly results included: (2) 2020 results include the Trident acquisition commencing on the March 2, 2020 date of acquisition. For the year ended December 31, 2019, quarterly results included:
(3) | Second quarter of 2019 net income included a $30.0 million significant legal settlement for the FTC matter, of which $23.3 million was non-deductible for income tax purposes during the second quarter of 2019.
(4) | Third quarter of 2019 net income included a $7.1 million significant legal settlement for the Oregon arbitration matter.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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