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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2019
Income Tax Disclosure [Abstract] |
Schedule of Provision (Benefit) for Income Taxes | The provision (benefit) for income taxes consists of the following:
|  | Years Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Current |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | (138 | ) |  | $ | — |  |  | $ | — |
State |  |  | 341 |  |  |  | 465 |  |  |  | 359 |
|  | $ | 203 |  |  | $ | 465 |  |  | $ | 359 |
Deferred |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 13,238 |  |  |  | (17,308 | ) |  |  | 17,713 |
State |  |  | 2,265 |  |  |  | (583 | ) |  |  | 2,802 |
|  | $ | 15,503 |  |  | $ | (17,891 | ) |  | $ | 20,515 |
Provision (Benefit) for income taxes |  | $ | 15,706 |  |  | $ | (17,426 | ) |  | $ | 20,874 |
Schedule of Reconciliation between Effective Tax Rate Income from Continuing Operations and Statutory Rate | Reconciliation between the effective tax rate on income from continuing operations and the statutory tax rate is as follows:
|  | Years Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Income tax expense at federal statutory rate |  | $ | 13,290 |  |  | $ | 3,878 |  |  | $ | 18,796 |
Increase (reduction) in income taxes resulting from: |  |  |  |  |  |  |  |  |  |  |  |
State taxes, net of federal tax benefit |  |  | 1,785 |  |  |  | 660 |  |  |  | 1,397 |
Nondeductible stock compensation expenses |  |  | (21 | ) |  |  | — |  |  |  | — |
Permanent items |  |  | 261 |  |  |  | 63 |  |  |  | 92 |
Change in valuation allowances |  |  | (50 | ) |  |  | (646 | ) |  |  | 531 |
US Tax Cuts and Jobs Act Impact |  |  | — |  |  |  | (22,015 | ) |  |  | — |
162(m) Limitation |  |  | 119 |  |  |  |  |  |  |  |  |
Impact of changing rates on deferred tax assets |  |  | 484 |  |  |  | (773 | ) |  |  | (353 | )
Expired tax attributes |  |  | 111 |  |  |  | 1,088 |  |  |  | 409 |
Other |  |  | (273 | ) |  |  | 319 |  |  |  | 2 |
Income tax expense (benefit) |  | $ | 15,706 |  |  | $ | (17,426 | ) |  | $ | 20,874 |
Schedule of Deferred Tax Assets | The Company's deferred tax assets as of September 30, 2019 and 2018 are as follows:
|  | Years Ended September 30, |
|  | 2019 |  |  | 2018 |
|  | (in thousands) |
Net operating carry forwards |  | $ | 106,645 |  |  | $ | 91,981 |
Deferred credits |  |  | 1,882 |  |  |  | 2,443 |
Other accrued expenses |  |  | 2,329 |  |  |  | 1,871 |
Prepaids and other |  |  | 2,576 |  |  |  | 3,530 |
State alternative minimum tax |  |  | 1 |  |  |  | 1 |
Other reserves and estimated losses |  |  | 947 |  |  |  | 836 |
Operating lease |  |  | 4,928 |  |  |  | 6,399 |
Allowance for doubtful receivables |  |  | — |  |  |  | 905 |
Subtotal |  | $ | 119,308 |  |  | $ | 107,966 |
Less: valuation allowance |  |  | (1,890 | ) |  |  | (1,940 | )
Total net deferred tax assets |  | $ | 117,418 |  |  | $ | 106,026 |
Intangibles |  |  | (2,204 | ) |  |  | (2,613 | )
Property and equipment |  |  | (170,517 | ) |  |  | (143,210 | )
Total deferred tax liabilities |  | $ | (172,721 | ) |  | $ | (145,823 | )
Net deferred tax liability |  | $ | (55,303 | ) |  | $ | (39,797 | )
Schedule of Reconciliation of Total Amounts of Unrecognized Tax Benefits | The following is a tabular reconciliation of the total amounts of unrecognized tax benefits:
|  | Years Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Unrecognized tax benefits — October 1 |  | $ | 4,688 |  |  | $ | 7,547 |  |  | $ | 7,547 |
Gross decreases — tax positions in prior period |  |  | — |  |  |  | (2,859 | ) |  |  | — |
Unrecognized tax benefits — September 30 |  | $ | 4,688 |  |  | $ | 4,688 |  |  | $ | 7,547 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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