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Selected Consolidated Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Sep. 30, 2020
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Selected Consolidated Financial Information | The following table sets forth certain unaudited selected consolidated financial information for each of the four quarters in the years ended September 30, 2020, 2019 and 2018. In management's opinion, this unaudited consolidated quarterly selected information has been prepared on the same basis as the audited consolidated financial statements and includes all necessary adjustments, consisting only of normal recurring adjustments, which management considers necessary for a fair presentation when read in conjunction with the Consolidated Financial Statements and notes. We believe these comparisons of consolidated quarterly selected financial data are not necessarily indicative of future performance. Quarterly EPS may not total to the fiscal year EPS due to the weighted average number of shares outstanding at the end of each period reported and rounding.
|  | 12/31/2019 |  |  | 3/31/2020 |  |  | 6/30/2020 |  |  | 9/30/2020 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
|  | (in thousands, except per share data) |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  | $ | 171,800 |  |  | $ | 165,781 |  |  | $ | 71,648 |  |  | $ | 97,361 |
Total operating revenues |  |  | 184,036 |  |  |  | 179,896 |  |  |  | 73,099 |  |  |  | 108,039 |
Operating income |  |  | 27,187 |  |  |  | 13,892 |  |  |  | 15,224 |  |  |  | 23,864 |
Net income |  |  | 10,785 |  |  |  | 1,885 |  |  |  | 3,419 |  |  |  | 11,375 |
Net income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.31 |  |  |  | 0.05 |  |  |  | 0.10 |  |  |  | 0.32 |
Diluted |  |  | 0.31 |  |  |  | 0.05 |  |  |  | 0.10 |  |  |  | 0.32 |
|  | 12/31/2018 |  |  | 3/31/2019 |  |  | 6/30/2019 |  |  | 9/30/2019 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
|  | (in thousands, except per share data) |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  | $ | 170,449 |  |  | $ | 169,771 |  |  | $ | 170,366 |  |  | $ | 172,248 |
Total operating revenues |  |  | 178,156 |  |  |  | 177,147 |  |  |  | 180,224 |  |  |  | 187,830 |
Operating income |  |  | 39,230 |  |  |  | 34,377 |  |  |  | 17,077 |  |  |  | 30,453 |
Net income |  |  | 19,081 |  |  |  | 13,249 |  |  |  | 3,007 |  |  |  | 12,243 |
Net income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.55 |  |  |  | 0.38 |  |  |  | 0.09 |  |  |  | 0.35 |
Diluted |  |  | 0.54 |  |  |  | 0.38 |  |  |  | 0.09 |  |  |  | 0.35 |
|  | 12/31/2017 |  |  | 3/31/2018 |  |  | 6/30/2018 |  |  | 9/30/2018 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
|  | (in thousands, except per share data) |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  | $ | 154,389 |  |  | $ | 156,515 |  |  | $ | 159,916 |  |  | $ | 168,444 |
Total operating revenues |  |  | 164,684 |  |  |  | 167,640 |  |  |  | 171,739 |  |  |  | 177,532 |
Operating income |  |  | 15,023 |  |  |  | 16,349 |  |  |  | (508 | ) |  |  | 41,784 |
Net income |  |  | 22,624 |  |  |  | 2,372 |  |  |  | (11,135 | ) |  |  | 19,394 |
Net income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.97 |  |  |  | 0.10 |  |  |  | (0.48 | ) |  |  | 0.66 |
Diluted |  |  | 0.96 |  |  |  | 0.10 |  |  |  | (0.48 | ) |  |  | 0.65 |

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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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