Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	8. INCOME TAXES The Company’s provision for income taxes was $28.7 million and $30.4 million for the three months ended March 31, 2017 and 2016, respectively. These amounts reflect effective tax rates of 28.2% and 33.5% for the three months ended March 31, 2017 and 2016, respectively. The decrease in the effective tax rate was primarily driven by the impact of discrete items, including the excess tax benefits related to the adoption of ASU 2016-09 during the three months ended March 31, 2017, in addition to the impact of the ongoing efforts to better align the Company’s tax profile with its global operating footprint. See Note 2, “Recent Accounting Standards Updates,” for more information regarding the adoption of ASU 2016-09. The effective tax rate of 28.2% for the three months ended March 31, 2017 reflects the Company’s estimate of the effective tax rate for the period and was impacted by certain discrete items totaling $3.5 million, primarily related to the excess tax benefits on share-based compensation recognized during the period, which decreased the Company’s effective tax rate by 3.5 percentage points. The effective tax rate of 33.5% for the three months ended March 31, 2016 reflected the Company’s estimate of the effective tax rate for the period and was impacted by a change in the mix of profits between tax jurisdictions. The Company is under examination by the IRS and other tax authorities in certain jurisdictions, including foreign jurisdictions, such as India, and states in which the Company has significant operations, such as New York. The tax years currently under examination vary by jurisdiction but include years ranging from 2005 through 2016. As a result of having previously been a member of the Morgan Stanley consolidated group, the Company may have future settlements with Morgan Stanley related to the ultimate disposition of their New York State and New York City examination relating to the tax years 2007 and 2008 and their IRS examination relating to the tax years 2006 through 2008. The Company does not believe it has any material exposure to the New York State and New York City examinations. Additionally, the Company believes it has adequate reserves for any tax issues that may arise out of the IRS examination relating to the tax years 2006 through 2008 and therefore does not believe any related settlement with Morgan Stanley will have a material impact. The Company regularly assesses the likelihood of additional assessments in each of the taxing jurisdictions in which it files income tax returns. The Company has established unrecognized tax benefits that the Company believes are adequate in relation to the potential for additional assessments. Once established, the Company adjusts unrecognized tax benefits only when more information is available or when an event occurs necessitating a change. As part of the Company’s periodic review of unrecognized tax benefits and based on new information regarding the status of federal and state examinations, the Company’s unrecognized tax benefits were remeasured. It is reasonably possible that significant changes in the balance of unrecognized tax benefits may occur within the next 12 months. At this time, however, it is not possible to reasonably estimate the expected change to the total amount of unrecognized tax benefits and the impact on the effective tax rate over the next 12 months.

8. INCOME TAXES

The Company’s provision for income taxes was $28.7 million and $30.4 million for the three months ended March 31, 2017 and 2016, respectively. These amounts reflect effective tax rates of 28.2% and 33.5% for the three months ended March 31, 2017 and 2016, respectively. The decrease in the effective tax rate was primarily driven by the impact of discrete items, including the excess tax benefits related to the adoption of ASU 2016-09 during the three months ended March 31, 2017, in addition to the impact of the ongoing efforts to better align the Company’s tax profile with its global operating footprint. See Note 2, “Recent Accounting Standards Updates,” for more information regarding the adoption of ASU 2016-09.

The effective tax rate of 28.2% for the three months ended March 31, 2017 reflects the Company’s estimate of the effective tax rate for the period and was impacted by certain discrete items totaling $3.5 million, primarily related to the excess tax benefits on share-based compensation recognized during the period, which decreased the Company’s effective tax rate by 3.5 percentage points.

The effective tax rate of 33.5% for the three months ended March 31, 2016 reflected the Company’s estimate of the effective tax rate for the period and was impacted by a change in the mix of profits between tax jurisdictions.

The Company is under examination by the IRS and other tax authorities in certain jurisdictions, including foreign jurisdictions, such as India, and states in which the Company has significant operations, such as New York. The tax years currently under examination vary by jurisdiction but include years ranging from 2005 through 2016. As a result of having previously been a member of the Morgan Stanley consolidated group, the Company may have future settlements with Morgan Stanley related to the ultimate disposition of their New York State and New York City examination relating to the tax years 2007 and 2008 and their IRS examination relating to the tax years 2006 through 2008. The Company does not believe it has any material exposure to the New York State and New York City examinations. Additionally, the Company believes it has adequate reserves for any tax issues that may arise out of the IRS examination relating to the tax years 2006 through 2008 and therefore does not believe any related settlement with Morgan Stanley will have a material impact.

The Company regularly assesses the likelihood of additional assessments in each of the taxing jurisdictions in which it files income tax returns. The Company has established unrecognized tax benefits that the Company believes are adequate in relation to the potential for additional assessments. Once established, the Company adjusts unrecognized tax benefits only when more information is available or when an event occurs necessitating a change. As part of the Company’s periodic review of unrecognized tax benefits and based on new information regarding the status of federal and state examinations, the Company’s unrecognized tax benefits were remeasured. It is reasonably possible that significant changes in the balance of unrecognized tax benefits may occur within the next 12 months. At this time, however, it is not possible to reasonably estimate the expected change to the total amount of unrecognized tax benefits and the impact on the effective tax rate over the next 12 months.