Income Taxes	3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We utilize our estimated annual effective tax rate to determine our provision for income taxes for interim periods. The income tax provision is computed by taking the estimated annual effective tax rate and multiplying it by the year-to-date pre-tax book income. We recorded income tax expense of $0.8 million and $1.3 million for the three months ended March 31, 2016 and 2015, respectively. Our effective tax rate was 21.5% and 19.5% during the three months ended March 31, 2016 and 2015, respectively. Our effective tax rate was lower in the prior year primarily due to the recording of a $0.3 million tax refund in China during the three months ended March 31, 2015 related to certain deductible research and development expenses incurred in 2013. At March 31, 2016, we had gross unrecognized tax benefits of $3.7 million, including interest and penalties, of which $3.3 million would affect the annual effective tax rate if these tax benefits are realized. Further, we are unaware of any positions for which it is reasonably possible that the total amount of unrecognized tax benefits will significantly change within the next twelve months. However, based on federal, state and foreign statute expirations in various jurisdictions, we anticipate a decrease in unrecognized tax benefits of approximately $0.1 million within the next twelve months. We have classified uncertain tax positions as non-current income tax liabilities unless expected to be paid within one year. We have elected to classify interest and penalties as a component of tax expense. Accrued interest and penalties of $0.2 million and $0.2 million at March 31, 2016 and December 31, 2015, respectively, are included in our unrecognized tax benefits. We file income tax returns in the U.S. federal jurisdiction, and in various state and foreign jurisdictions. On March 31, 2016, the open statutes of limitations in our significant tax jurisdictions were as follows: federal 2012 through 2014, state 2011 through 2014, and foreign 2009 through 2014.

Income Taxes

3 Months Ended

Mar. 31, 2016

We utilize our estimated annual effective tax rate to determine our provision for income taxes for interim periods. The income tax provision is computed by taking the estimated annual effective tax rate and multiplying it by the year-to-date pre-tax book income.

We recorded income tax expense of $0.8 million and $1.3 million for the three months ended March 31, 2016 and 2015, respectively. Our effective tax rate was 21.5% and 19.5% during the three months ended March 31, 2016 and 2015, respectively. Our effective tax rate was lower in the prior year primarily due to the recording of a $0.3 million tax refund in China during the three months ended March 31, 2015 related to certain deductible research and development expenses incurred in 2013.

At March 31, 2016, we had gross unrecognized tax benefits of $3.7 million, including interest and penalties, of which $3.3 million would affect the annual effective tax rate if these tax benefits are realized. Further, we are unaware of any positions for which it is reasonably possible that the total amount of unrecognized tax benefits will significantly change within the next twelve months. However, based on federal, state and foreign statute expirations in various jurisdictions, we anticipate a decrease in unrecognized tax benefits of approximately $0.1 million within the next twelve months. We have classified uncertain tax positions as non-current income tax liabilities unless expected to be paid within one year.

We have elected to classify interest and penalties as a component of tax expense. Accrued interest and penalties of $0.2 million and $0.2 million at March 31, 2016 and December 31, 2015, respectively, are included in our unrecognized tax benefits.

We file income tax returns in the U.S. federal jurisdiction, and in various state and foreign jurisdictions. On March 31, 2016, the open statutes of limitations in our significant tax jurisdictions were as follows: federal 2012 through 2014, state 2011 through 2014, and foreign 2009 through 2014.