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Summarized Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Summarized Quarterly Financial Data (Unaudited) | Summarized Quarterly Financial Data (Unaudited) Quarterly financial information for 2019 and 2020 is as follows (in thousands except per share data):
| Quarter
2019 | First |  | Second |  | Third |  | Fourth
Revenues | $ | 246,508 |  |  | $ | 245,110 |  |  | $ | 241,747 |  |  | $ | 263,772 |
Income from operations | 25,723 |  |  | 27,596 |  |  | 20,000 |  |  | 37,213 |
Net income (loss) | 11,500 |  |  | 24,409 |  |  | 16,692 |  |  | 28,537 |
Net income (loss) per share: |  |  |  |  |  |  |
Basic | $ | 0.53 |  |  | $ | 1.12 |  |  | $ | 0.77 |  |  | $ | 1.31 |
Diluted | $ | 0.52 |  |  | $ | 1.10 |  |  | $ | 0.75 |  |  | $ | 1.29 |
| Quarter
2020 | First |  | Second |  | Third |  | Fourth
Revenues | $ | 265,302 |  |  | $ | 255,831 |  |  | $ | 239,026 |  |  | $ | 267,494 |
Income from operations | 43,959 |  |  | 46,395 |  |  | 15,422 |  |  | 3,608 |
Net income | 35,239 |  |  | 34,152 |  |  | 10,960 |  |  | 5,917 |
Net income per share: |  |  |  |  |  |  |
Basic | $ | 1.62 |  |  | $ | 1.57 |  |  | $ | 0.48 |  |  | $ | 0.25 |
Diluted | $ | 1.60 |  |  | $ | 1.55 |  |  | $ | 0.47 |  |  | $ | 0.25 |

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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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