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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2017
Income Tax Disclosure [Abstract] |
Schedule of components of income tax expense (benefit) | Our expense (benefit) from income taxes from continuing operations consists of the following for the periods presented:
| Fiscal Year Ended September 30,
(In thousands) | 2017 |  | 2016 |  | 2015
Current federal | $ | — |  |  | $ | — |  |  | $ | (64 | )
Current state | 859 |  |  | 595 |  |  | 520 |
Deferred federal (a) | 1,625 |  |  | 5,574 |  |  | (314,651 | )
Deferred state (a) (b) | 212 |  |  | 10,329 |  |  | (10,374 | )
Total | $ | 2,696 |  |  | $ | 16,498 |  |  | $ | (324,569 | )
(a) Fiscal 2015 benefit is due to release of a substantial portion of the valuation allowance on our deferred tax assets; refer to discussion below titled “Valuation Allowance.” (b) Fiscal 2016 expense includes $8.6 million of additional valuation allowance on our state deferred tax assets due to a number of changes to the legal forms of our operating entities; refer to discussion below titled “Valuation Allowance.”
Schedule of effective income tax rate reconciliation | The expense (benefit) from income taxes from continuing operations differs from the amount computed by applying the federal income tax statutory rate as follows for the periods presented:
| Fiscal Year Ended September 30,
(In thousands) | 2017 |  | 2016 |  | 2015
Income tax computed at statutory rate | $ | 12,052 |  |  | $ | 7,596 |  |  | $ | 7,711 |
State income taxes, net of federal benefit | 1,287 |  |  | 4,974 |  |  | 2,485 |
(Decrease) increase in valuation allowance - other (a) (b) (c) | (3,482 | ) |  | 6,457 |  |  | (334,605 | )
Changes for uncertain tax positions | (685 | ) |  | (40 | ) |  | 42 |
Stock based compensation | 741 |  |  | — |  |  | — |
State rate change | — |  |  | (678 | ) |  | — |
Tax credits | (7,460 | ) |  | (2,134 | ) |  | — |
Other, net | 243 |  |  | 323 |  |  | (202 | )
Total | $ | 2,696 |  |  | $ | 16,498 |  |  | $ | (324,569 | )
(a) For fiscal 2015, amount includes $335.2 million release of a substantial portion of the valuation allowance on our deferred tax assets; refer to discussion below titled “Valuation Allowance.” (b) For fiscal 2016, amount includes $8.6 million of additional valuation allowance on our state deferred tax assets due to a number of changes to the legal forms of our operating entities; refer to discussion below titled “Valuation Allowance.”
Schedule of deferred tax assets and liabilities | The tax effects of significant temporary differences that give rise to the net deferred tax assets are as follows as of September 30, 2017 and September 30, 2016:
(In thousands) | September 30, 2017 |  | September 30, 2016
Deferred tax assets: |  |  |
Federal and state tax carryforwards | $ | 293,298 |  |  | $ | 298,426 |
Inventory adjustments | 59,507 |  |  | 62,985 |
Incentive compensation | 19,043 |  |  | 15,390 |
Warranty and other reserves | 6,140 |  |  | 16,943 |
Property, equipment and other assets | 3,247 |  |  | 2,896 |
Other | 1,785 |  |  | 809 |
Uncertain tax positions | 1,332 |  |  | 1,721 |
Total deferred tax assets | 384,352 |  |  | 399,170 |
Deferred tax liabilities: |  |  |
Deferred revenues | (11,297 | ) |  | (22,950 | )
Total deferred tax liabilities | (11,297 | ) |  | (22,950 | )
Net deferred tax assets before valuation allowance | 373,055 |  |  | 376,220 |
Valuation allowance (a) | (65,159 | ) |  | (66,265 | )
Net deferred tax assets | $ | 307,896 |  |  | $ | 309,955 |
(a) For fiscal 2016, amount includes $8.6 million of additional valuation allowance on our state deferred tax assets due to a number of changes to the legal forms of our operating entities; refer to discussion below titled “Valuation Allowance.”
Schedule of unrecognized tax benefits roll forward | A reconciliation of our unrecognized tax benefits is as follows for the beginning and end of each period presented:
| Fiscal Year Ended September 30,
(In thousands) | 2017 |  | 2016 |  | 2015
Balance at beginning of year | $ | 4,541 |  |  | $ | 4,721 |  |  | $ | 4,615 |
Additions for (reductions in) tax positions related to current year | 61 |  |  | (180 | ) |  | 252 |
Additions for tax positions related to prior years | 2,611 |  |  | — |  |  | — |
Reductions in tax positions of prior years | (2,273 | ) |  | — |  |  | (10 | )
Lapse of statute of limitations | (1,136 | ) |  | — |  |  | (136 | )
Balance at end of year | $ | 3,804 |  |  | $ | 4,541 |  |  | $ | 4,721 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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