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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Financial Information | The following is a summary of certain items in the consolidated statements of operations by quarter:
Fiscal Year 2018 | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Revenues | $ | 147,455 |  |  | $ | 165,649 |  |  | $ | 172,832 |  |  | $ | 174,724 |
Operating income (loss) | $ | 838 |  |  | $ | 15,149 |  |  | $ | 28,884 |  |  | $ | (5,138 | )
Net (loss) income | $ | (3,910 | ) |  | $ | 1,704 |  |  | $ | 22,302 |  |  | $ | (13,676 | )
Earnings per common share: |  |  |  |  |  |  | — |
Basic weighted average common shares outstanding | 42,370 |  |  | 42,661 |  |  | 42,779 |  |  | 42,936 |
Basic earnings per share | $ | (0.09 | ) |  | $ | 0.04 |  |  | $ | 0.52 |  |  | $ | (0.32 | )
Diluted weighted average common shares outstanding | 42,370 |  |  | 43,916 |  |  | 44,175 |  |  | 42,936 |
Diluted earnings per share | $ | (0.09 | ) |  | $ | 0.04 |  |  | $ | 0.50 |  |  | $ | (0.32 | )
Fiscal Year 2017 | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Revenues | $ | 133,802 |  |  | $ | 154,016 |  |  | $ | 160,269 |  |  | $ | 151,222 |
Operating income (loss) | $ | 6,564 |  |  | $ | (47,279 | ) |  | $ | 18,277 |  |  | $ | 9,855 |
Net (loss) income | $ | (224 | ) |  | $ | (53,675 | ) |  | $ | 12,080 |  |  | $ | 20,020 |
Earnings per common share: |  |  |  |  |  |  |
Basic weighted average common shares outstanding | 41,584 |  |  | 41,811 |  |  | 41,951 |  |  | 42,033 |
Basic earnings per share | $ | (0.01 | ) |  | $ | (1.28 | ) |  | $ | 0.29 |  |  | $ | 0.48 |
Diluted weighted average common shares outstanding | 41,584 |  |  | 41,811 |  |  | 43,295 |  |  | 43,394 |
Diluted earnings per share | $ | (0.01 | ) |  | $ | (1.28 | ) |  | $ | 0.28 |  |  | $ | 0.46 |

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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