Income Taxes	3 Months Ended
Income Taxes	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate The effective income tax rate was 1.7% and (31.1)% during the quarters ended December 31, 2020 and 2019, respectively. The provision for income taxes during interim quarterly reporting periods is based on our estimates of the effective tax rates for the full fiscal year. The effective tax rate in any quarter can also be affected positively or negatively by adjustments that are required to be reported in the specific quarter of resolution. The effective tax rates for the quarters ended December 31, 2020 and 2019 were both impacted by the recording of excess tax benefits relating to stock awards. The impact is dependent upon grants of stock-based compensation and the future stock price in relation to the fair value of awards on the grant date. The increase in stock price for awards that vested in December 2019 was significantly larger than the increase in stock price for the awards that vested in December 2020. The total unrecognized tax benefit for uncertain tax positions was estimated to be $9.0 million and $8.0 million at December 31, 2020 and September 30, 2020, respectively. We recognize interest expense related to unrecognized tax benefits and penalties as part of the provision for income taxes in our condensed consolidated statements of income and comprehensive income. We accrued interest of $0.5 million and $0.4 million related to unrecognized tax benefits as of December 31, 2020 and September 30, 2020, respectively.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.