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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) | The following tables summarize the unaudited quarterly financial data for the last two fiscal years.
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (in thousands, except per share amounts) |  |  |  |  |  |
2018 |  |  |  |  |  |  |
Revenues | $ | 501,810 |  | $ | 503,732 |  | $ | 506,871 |  | $ | 496,408
Operating costs and expenses | $ | 503,681 |  | $ | 471,736 |  | $ | 475,916 |  | $ | 457,251
(Loss) income before income taxes | $ | (1,395) |  | $ | 33,316 |  | $ | 32,982 |  | $ | 35,007
Net income | $ | 72 |  | $ | 25,814 |  | $ | 26,086 |  | $ | 31,552
Basic earnings per common share | $ | 0.00 |  | $ | 0.35 |  | $ | 0.35 |  | $ | 0.43
Diluted earnings per common share | $ | 0.00 |  | $ | 0.35 |  | $ | 0.35 |  | $ | 0.42
Cash dividends declared per common share | $ | 0.19250 |  | $ | 0.19375 |  | $ | 0.19500 |  | $ | 0.19625
2017 |  |  |  |  |  |  |
Revenues | $ | 404,490 |  | $ | 470,876 |  | $ | 491,355 |  | $ | 499,410
Operating costs and expenses | $ | 373,780 |  | $ | 439,313 |  | $ | 459,864 |  | $ | 466,285
Income before income taxes | $ | 32,279 |  | $ | 33,078 |  | $ | 32,930 |  | $ | 34,678
Net income | $ | 22,017 |  | $ | 22,551 |  | $ | 23,472 |  | $ | 20,186
Basic earnings per common share | $ | 0.30 |  | $ | 0.31 |  | $ | 0.32 |  | $ | 0.27
Diluted earnings per common share | $ | 0.30 |  | $ | 0.30 |  | $ | 0.31 |  | $ | 0.27
Cash dividends declared per common share | $ | 0.18750 |  | $ | 0.18875 |  | $ | 0.19000 |  | $ | 0.19125

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- References No definition available. + Details
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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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