Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In calculating the provision for income taxes, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances at each interim period. On a quarterly basis, the estimated annual effective tax rate is adjusted, as appropriate, based upon changes in facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter. The provision for income taxes reflected U.S. federal, state and local taxes at an estimated effective tax rate of 24.4% and 38.9% for the three months ended March 31, 2017 and 2016, respectively. The decrease in the estimated effective tax rate was primarily due to changes in the valuation allowances related to market adjustments on the Company’s marketable securities and the impact of recording excess tax benefits as a result of stock option exercises and RSU vestings.

Income Taxes

3 Months Ended

Mar. 31, 2017

In calculating the provision for income taxes, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances at each interim period. On a quarterly basis, the estimated annual effective tax rate is adjusted, as appropriate, based upon changes in facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter.

The provision for income taxes reflected U.S. federal, state and local taxes at an estimated effective tax rate of 24.4% and 38.9% for the three months ended March 31, 2017 and 2016, respectively. The decrease in the estimated effective tax rate was primarily due to changes in the valuation allowances related to market adjustments on the Company’s marketable securities and the impact of recording excess tax benefits as a result of stock option exercises and RSU vestings.