Income Taxes	9 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate The effective income tax rate was 32.2% and 31.4% during the quarters ended June 30, 2014 and 2013, respectively, and 34.4% and 30.9% during the nine months ended June 30, 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 increase in our effective tax rate year over year was primarily due to the expiration of the U.S. Federal Research and Development credit and a higher percentage of revenue expected in higher taxing jurisdictions. The total unrecognized tax benefit for uncertain tax positions at June 30, 2014 and September 30, 2013 is estimated to be approximately $6.7 million and $9.0 million, 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. As of June 30, 2014 and September 30, 2013, we have accrued interest of $0.5 million and $0.9 million, respectively, related to unrecognized tax benefits.

Income Taxes

9 Months Ended

Jun. 30, 2014

Effective Tax Rate

The effective income tax rate was 32.2% and 31.4% during the quarters ended June 30, 2014 and 2013, respectively, and 34.4% and 30.9% during the nine months ended June 30, 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 increase in our effective tax rate year over year was primarily due to the expiration of the U.S. Federal Research and Development credit and a higher percentage of revenue expected in higher taxing jurisdictions.

The total unrecognized tax benefit for uncertain tax positions at June 30, 2014 and September 30, 2013 is estimated to be approximately $6.7 million and $9.0 million, 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. As of June 30, 2014 and September 30, 2013, we have accrued interest of $0.5 million and $0.9 million, respectively, related to unrecognized tax benefits.