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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data |
|  | Three Months Ended |
|  | Dec. 31 |  |  | Sep. 30 |  |  | Jun. 30 |  |  | Mar. 31 |  |  | Dec. 31 |  |  | Sep. 30 |  |  | Jun. 30 |  |  | Mar. 31 |
|  | 2019 |  |  | 2019 |  |  | 2019 |  |  | 2019 |  |  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |
Consolidated Financial Statement Data: |  | (in thousands, except per share data) |
Total revenues |  | $ | 237,908 |  |  | $ | 198,220 |  |  | $ | 209,593 |  |  | $ | 160,707 |  |  | $ | 230,283 |  |  | $ | 210,590 |  |  | $ | 199,402 |  |  | $ | 174,541 |
Cost of services |  |  | 155,196 |  |  |  | 124,147 |  |  |  | 127,847 |  |  |  | 91,688 |  |  |  | 148,469 |  |  |  | 132,896 |  |  |  | 119,869 |  |  |  | 101,649 |
Operating income |  |  | 27,104 |  |  |  | 24,072 |  |  |  | 26,978 |  |  |  | 18,269 |  |  |  | 32,489 |  |  |  | 27,384 |  |  |  | 28,950 |  |  |  | 23,464 |
Net income |  |  | 20,721 |  |  |  | 19,292 |  |  |  | 21,279 |  |  |  | 15,638 |  |  |  | 26,225 |  |  |  | 20,854 |  |  |  | 22,167 |  |  |  | 18,011 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.53 |  |  | $ | 0.49 |  |  | $ | 0.54 |  |  | $ | 0.40 |  |  | $ | 0.67 |  |  | $ | 0.53 |  |  | $ | 0.57 |  |  | $ | 0.46 |
Diluted |  | $ | 0.52 |  |  | $ | 0.49 |  |  | $ | 0.54 |  |  | $ | 0.40 |  |  | $ | 0.66 |  |  | $ | 0.53 |  |  | $ | 0.56 |  |  | $ | 0.46 |

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- References No definition available. + Details
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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=118952077&loc=d3e1280-108306 + Details
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