Income Taxes	3 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate The effective income tax rate was 21.4% and 37.5% during the quarters ended December 31, 2014 and 2013, respectively. The provision for income taxes during interim quarterly reporting periods is based on our estimates of the effective tax rates for the respective 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 decrease in our effective tax rate year over year was primarily due to the retroactive extension of the U.S. Federal Research and Development Credit through 2014, which was enacted during the quarter ended December 31, 2014. The total unrecognized tax benefit for uncertain tax positions is estimated to be approximately $5.3 million and $4.6 million at December 31, 2014 and September 30, 2014, 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 have accrued interest of $0.6 million and $0.5 million, related to unrecognized tax benefits as of December 31, 2014 and September 30, 2014, respectively.

Income Taxes

3 Months Ended

Dec. 31, 2014

Effective Tax Rate

The effective income tax rate was 21.4% and 37.5% during the quarters ended December 31, 2014 and 2013, respectively. The provision for income taxes during interim quarterly reporting periods is based on our estimates of the effective tax rates for the respective 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 decrease in our effective tax rate year over year was primarily due to the retroactive extension of the U.S. Federal Research and Development Credit through 2014, which was enacted during the quarter ended December 31, 2014.

The total unrecognized tax benefit for uncertain tax positions is estimated to be approximately $5.3 million and $4.6 million at December 31, 2014 and September 30, 2014, 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 have accrued interest of $0.6 million and $0.5 million, related to unrecognized tax benefits as of December 31, 2014 and September 30, 2014, respectively.