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Selected Consolidated Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Sep. 30, 2019
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, 2019, 2018 and 2017. 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.
|  | 12/31/2018 |  |  | 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 (loss) |  |  | 19,081 |  |  |  | 13,249 |  |  |  | 3,007 |  |  |  | 12,243 |
Net (loss) 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 (loss) |  |  | 22,624 |  |  |  | 2,372 |  |  |  | (11,135 | ) |  |  | 19,394 |
Net (loss) 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 |
|  | 12/31/2016 |  |  | 3/31/2017 |  |  | 6/30/2017 |  |  | 9/30/2017 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
|  | (in thousands, except per share data) |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  | $ | 155,502 |  |  | $ | 154,210 |  |  | $ | 157,411 |  |  | $ | 151,575 |
Total operating revenues |  |  | 160,235 |  |  |  | 159,096 |  |  |  | 166,952 |  |  |  | 157,293 |
Operating income |  |  | 20,838 |  |  |  | 20,405 |  |  |  | 36,360 |  |  |  | 22,691 |
Net income |  |  | 6,610 |  |  |  | 5,304 |  |  |  | 15,432 |  |  |  | 5,482 |
Net (loss) income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.28 |  |  |  | 0.23 |  |  |  | 0.67 |  |  |  | 0.24 |
Diluted |  |  | 0.28 |  |  |  | 0.23 |  |  |  | 0.66 |  |  |  | 0.24 |
Summary of Basic and Diluted Net Income per Common Share Available to Common Shareholders | The restatement adjustment did not impact our previously reported consolidated balance sheet, consolidated statements of stockholders' equity, consolidated statements of cash flows, or net income (in thousands, except per share data).
|  | Twelve Months Ended September 30, 2018 |
|  | As Previously Reported |  |  | As Restated |
Net income per common share available to common shareholders - Basic |  | $ | 2.46 |  |  | $ | 1.34 |
Shares used in computing net income per common share available to common shareholders - Basic |  |  | 13,516 |  |  |  | 24,826 |
Net income per common share available to common shareholders - Diluted |  | $ | 1.32 |  |  | $ | 1.32 |
Shares used in computing net income per common share available to common shareholders - Diluted |  |  | 25,171 |  |  |  | 25,257 |
|  | Twelve Months Ended September 30, 2017 |
|  | As Previously Reported |  |  | As Restated |
Net income per common share available to common shareholders - Basic |  | $ | 3.01 |  |  | $ | 1.41 |
Shares used in computing net income per common share available to common shareholders - Basic |  |  | 10,919 |  |  |  | 23,201 |
Net income per common share available to common shareholders - Diluted |  | $ | 1.40 |  |  | $ | 1.40 |
Shares used in computing net income per common share available to common shareholders - Diluted |  |  | 23,386 |  |  |  | 23,370 |
The restatement adjustment did not impact our previously reported consolidated balance sheet, consolidated statements of stockholders' equity, consolidated statements of cash flows, or net income (in thousands, except per share data).
|  | Three Months Ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | As Previously Reported |  |  | As Restated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.80 |  |  | $ | 0.55 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted |  | $ | 0.55 |  |  | $ | 0.54 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Three Months Ended December 31, 2017 |  |  | Three Months Ended March 31, 2018 |  |  | Three Months Ended June 30, 2018 |  |  | Three Months Ended September 30, 2018 |
|  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |
Net income (loss) per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 2.00 |  |  | $ | 0.97 |  |  | $ | 0.20 |  |  | $ | 0.10 |  |  | $ | (0.89 | ) |  | $ | (0.48 | ) |  | $ | 1.04 |  |  | $ | 0.66 |
Diluted |  | $ | 0.96 |  |  | $ | 0.96 |  |  | $ | 0.10 |  |  | $ | 0.10 |  |  | $ | (0.89 | ) |  | $ | (0.48 | ) |  | $ | 0.65 |  |  | $ | 0.65 |
|  | Three Months Ended December 31, 2016 |  |  | Three Months Ended March 31, 2017 |  |  | Three Months Ended June 30, 2017 |  |  | Three Months Ended September 30, 2017 |
|  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |  |  | As Previously Reported |  |  | As Restated |
Net income per share attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.62 |  |  | $ | 0.28 |  |  | $ | 0.48 |  |  | $ | 0.23 |  |  | $ | 1.40 |  |  | $ | 0.67 |  |  | $ | 0.49 |  |  | $ | 0.24 |
Diluted |  | $ | 0.28 |  |  | $ | 0.28 |  |  | $ | 0.23 |  |  | $ | 0.23 |  |  | $ | 0.66 |  |  | $ | 0.66 |  |  | $ | 0.23 |  |  | $ | 0.24 |

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