9.	Income Taxes

The Company files income tax returns in the United States Federal jurisdiction, in a limited number of foreign jurisdictions, and in many state jurisdictions. The Company is currently under examination by the Internal Revenue Service for years 2009, 2010 and 2011. With few exceptions, the Company is no longer subject to U.S. Federal, state or foreign income tax examinations for years before 2009.

The Company had $5.6 million and $5.2 million of unrecognized tax benefits at September 30, 2013 and December 31, 2012, respectively. The Company believes it is reasonably possible that the total amounts of unrecognized tax benefits will change in the following twelve months; however, actual results could differ from those currently expected. Of the balance of unrecognized tax benefits, $2.2 million would affect the Company’s effective tax rate if recognized at some point in the future.

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. The Company provided for income taxes at estimated effective tax rates of 42.3% and 33.4%, respectively, for the three and nine month periods ended September 30, 2013. The Company’s effective rate for the three months ended September 30, 2013 was greater than our federal statutory rate of 35% primarily due to an increase in the valuation allowance related to an investment in which the Company is anticipating a future capital loss. The Company’s effective tax rate was less than our federal statutory rate for the first nine months of 2013 primarily due to the favorable impact of the research and development tax credit. The Company provided for income taxes at an estimated effective tax benefit rate of 25.3% and an estimated effective tax rate of 26.5%, respectively, for the three and nine month periods ended September 30, 2012. During the third quarter of 2012, the Company performed a research and development tax credit study for fiscal years 2010 through 2011. The Company recorded a net tax benefit of $1.8 million resulting from this study in the third quarter of 2012. Combined with the operating results for the quarter, the Company’s effective rates for the three and nine months ended September 30, 2012 were therefore less than our federal statutory rate of 35%.