| Year ended September 30, | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| Current federal income tax expense (benefit) | $ | 2,837 | (853 | ) | 7,769 | |||||||
| Current state income tax expense (benefit) | 336 | (254 | ) | 1,033 | ||||||||
| Total current income tax expense (benefit) | 3,173 | (1,107 | ) | 8,802 | ||||||||
| Deferred federal income tax expense | 206 | 6,103 | 514 | |||||||||
| Deferred state income tax expense | 35 | 868 | 116 | |||||||||
| Total deferred income tax expens e | 241 | 6,971 | 630 | |||||||||
| Total provision for income taxes | $ | 3,414 | 5,864 | 9,432 | ||||||||
| Year ended September 30, | ||||||||||||
| 2017 | 2016 | 201 5 | ||||||||||
| Statutory tax rate | 34.0 | % | 34.0 | 35.0 | ||||||||
| State income taxes, net of federal income tax expense | 2.7 | 2.9 | 2.9 | |||||||||
| Enhanced food deduction | (2.7 | ) | (1.6 | ) | — | |||||||
| Other, net | (0.9 | ) | (1.4 | ) | (1.1 | ) | ||||||
| Effective tax rate | 33.1 | % | 33.9 | 36.8 | ||||||||
| As of September 30, | ||||||||
| 2017 | 2016 | |||||||
| Current assets | $ | — | — | |||||
| Long-term liabilities | (12,419 | ) | (12,178 | ) | ||||
| Net deferred tax liabilities | $ | (12,419 | ) | (12,178 | ) | |||
| As of September 30, | ||||||||
| 2017 | 2016 | |||||||
| Deferred tax assets | ||||||||
| Capital and financing lease obligations | $ | 12,670 | 12,091 | |||||
| Goodwill | 1,853 | 2,222 | ||||||
| Leasehold incentives | 3,484 | 3,187 | ||||||
| Deferred rent | 3,980 | 3,350 | ||||||
| Trademarks | 1,021 | 1,021 | ||||||
| Accrued employee benefits | 910 | 734 | ||||||
| Oth er | 907 | 597 | ||||||
| Gross deferred tax assets | 24,825 | 23,202 | ||||||
| Deferred tax liabilities | ||||||||
| Property and equipment | (33,127 | ) | (32,103 | ) | ||||
| Leasehold improvements | (3,774 | ) | (3,195 | ) | ||||
| Other | (343 | ) | (82 | ) | ||||
| Gross deferred tax liabilities | (37,244 | ) | (35,380 | ) | ||||
| Net deferred tax liabilities | $ | (12,419 | ) | (12,178 | ) | |||