Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company is required to estimate its income taxes in each of the jurisdictions in which it operates as part of the process of preparing its condensed consolidated financial statements. The Company maintains certain strategic management and operational activities in overseas subsidiaries and its foreign earnings are taxed at rates that are generally lower than in the United States. The Company does not expect to remit earnings from its foreign subsidiaries. In March 2016, the Financial Accounting Standards Board issued an accounting standard update on the accounting of stock-based compensation to provide guidance that changes the accounting for certain aspects of share-based payments to employees. The guidance requires, among other things, the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, thus eliminating additional paid-in capital pools. The Company adopted this standard in the first quarter of 2017. There was no material impact upon adoption of this guidance since the recognition of income tax effects of awards was not materially different from amounts previously recorded in the Company's financial statements. The Company’s continuing operations effective tax rate was 5.3% and 8.5% for the three months ended September 30, 2017 and 2016, respectively. The decrease in the effective tax rate when comparing the three months ended September 30, 2017 to the three months ended September 30, 2016 was generally due to the recognition of a $7.9 million benefit from the release of uncertain tax positions due to the expiration of statute of limitations in certain jurisdictions. The Company’s effective tax rate for continuing operations was 16.9% and 13.2% for the nine months ended September 30, 2017 and September 30, 2016, respectively. The increase in the effective tax rate when comparing the nine months ended September 30, 2017 to the nine months ended September 30, 2016 was primarily due to certain transactions executed during the nine months ended September 30, 2017. These amounts include a $46.1 million income tax charge to establish a valuation allowance due to a change in expectation of realizability of state R&D credits arising from the separation of the GoTo Business. This charge was partially offset by a $20.9 million benefit due to the adoption of the accounting standard update requiring recognition of income tax effects related to stock-based compensation when the awards vest or settle. This charge was also partially offset by a $9.8 million net tax benefit related to an international statutory tax transaction and a $7.9 million benefit from the release of uncertain tax positions due to the expiration of statute of limitations in certain jurisdictions. The Company’s net unrecognized tax benefits totaled $69.2 million and $69.8 million as of September 30, 2017 and December 31, 2016, respectively. All amounts included in the balance at September 30, 2017 for tax positions would affect the annual effective tax rate if recognized. The Company has $2.4 million accrued for the payment of interest and penalties as of September 30, 2017. The Company and one or more of its subsidiaries are subject to U.S. federal income taxes in the United States, as well as income taxes of multiple state and foreign jurisdictions. The Company is currently no longer subject to U.S. federal income tax examination. With few exceptions, the Company is generally not under examination for state and local income tax, or non-U.S. jurisdictions by tax authorities for years prior to 2013. In the ordinary course of global business, there are transactions for which the ultimate tax outcome is uncertain; thus, judgment is required in determining the worldwide provision for income taxes. The Company provides for income taxes on transactions based on its estimate of the probable liability. The Company adjusts its provision as appropriate for changes that impact its underlying judgments. Changes that impact provision estimates include such items as jurisdictional interpretations on tax filing positions based on the results of tax audits and general tax authority rulings. Due to the evolving nature of tax rules combined with the large number of jurisdictions in which the Company operates, it is possible that the Company’s estimates of its tax liability and the realizability of its deferred tax assets could change in the future, which may result in additional tax liabilities and adversely affect the Company’s results of operations, financial condition or cash flows. At September 30, 2017, the Company had $194.5 million in net deferred tax assets from continuing operations. The authoritative guidance requires a valuation allowance to reduce the deferred tax assets reported if, based on the weight of the evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company reviews deferred tax assets periodically for recoverability and makes estimates and judgments regarding the expected geographic sources of taxable income and gains from investments, as well as tax planning strategies in assessing the need for a valuation allowance. If the estimates and assumptions used in the Company's determination change in the future, the Company could be required to revise its estimates of the valuation allowances against its deferred tax assets and adjust its provisions for additional income taxes. The Company’s effective tax rate generally differs from the U.S. federal statutory rate of 35% due primarily to lower tax rates on earnings generated by the Company’s foreign operations that are taxed primarily in Switzerland. The Company has not provided for U.S. taxes for those earnings because it plans to reinvest all of those earnings indefinitely outside the United States. From time to time, there may be other items that impact the Company's effective tax rate, such as the items specific to the current period discussed above.

INCOME TAXES

The Company is required to estimate its income taxes in each of the jurisdictions in which it operates as part of the process of preparing its condensed consolidated financial statements. The Company maintains certain strategic management and operational activities in overseas subsidiaries and its foreign earnings are taxed at rates that are generally lower than in the United States. The Company does not expect to remit earnings from its foreign subsidiaries.

In March 2016, the Financial Accounting Standards Board issued an accounting standard update on the accounting of stock-based compensation to provide guidance that changes the accounting for certain aspects of share-based payments to employees. The guidance requires, among other things, the recognition of the income tax effects of awards in the income statement when the awards vest or are settled, thus eliminating additional paid-in capital pools. The Company adopted this standard in the first quarter of 2017. There was no material impact upon adoption of this guidance since the recognition of income tax effects of awards was not materially different from amounts previously recorded in the Company's financial statements.

The Company’s continuing operations effective tax rate was 5.3% and 8.5% for the three months ended September 30, 2017 and 2016, respectively. The decrease in the effective tax rate when comparing the three months ended September 30, 2017 to the three months ended September 30, 2016 was generally due to the recognition of a $7.9 million benefit from the release of uncertain tax positions due to the expiration of statute of limitations in certain jurisdictions. The Company’s effective tax rate for continuing operations was 16.9% and 13.2% for the nine months ended September 30, 2017 and September 30, 2016, respectively. The increase in the effective tax rate when comparing the nine months ended September 30, 2017 to the nine months ended September 30, 2016 was primarily due to certain transactions executed during the nine months ended September 30, 2017. These amounts include a $46.1 million income tax charge to establish a valuation allowance due to a change in expectation of realizability of state R&D credits arising from the separation of the GoTo Business. This charge was partially offset by a $20.9 million benefit due to the adoption of the accounting standard update requiring recognition of income tax effects related to stock-based compensation when the awards vest or settle. This charge was also partially offset by a $9.8 million net tax benefit related to an international statutory tax transaction and a $7.9 million benefit from the release of uncertain tax positions due to the expiration of statute of limitations in certain jurisdictions.

The Company’s net unrecognized tax benefits totaled $69.2 million and $69.8 million as of September 30, 2017 and December 31, 2016, respectively. All amounts included in the balance at September 30, 2017 for tax positions would affect the annual effective tax rate if recognized. The Company has $2.4 million accrued for the payment of interest and penalties as of September 30, 2017.

The Company and one or more of its subsidiaries are subject to U.S. federal income taxes in the United States, as well as income taxes of multiple state and foreign jurisdictions. The Company is currently no longer subject to U.S. federal income tax examination. With few exceptions, the Company is generally not under examination for state and local income tax, or non-U.S. jurisdictions by tax authorities for years prior to 2013.

In the ordinary course of global business, there are transactions for which the ultimate tax outcome is uncertain; thus, judgment is required in determining the worldwide provision for income taxes. The Company provides for income taxes on transactions based on its estimate of the probable liability. The Company adjusts its provision as appropriate for changes that impact its underlying judgments. Changes that impact provision estimates include such items as jurisdictional interpretations on tax filing positions based on the results of tax audits and general tax authority rulings. Due to the evolving nature of tax rules combined with the large number of jurisdictions in which the Company operates, it is possible that the Company’s estimates of its tax liability and the realizability of its deferred tax assets could change in the future, which may result in additional tax liabilities and adversely affect the Company’s results of operations, financial condition or cash flows.

At September 30, 2017, the Company had $194.5 million in net deferred tax assets from continuing operations. The authoritative guidance requires a valuation allowance to reduce the deferred tax assets reported if, based on the weight of the evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company reviews deferred tax assets periodically for recoverability and makes estimates and judgments regarding the expected geographic sources of taxable income and gains from investments, as well as tax planning strategies in assessing the need for a valuation allowance. If the estimates and assumptions used in the Company's determination change in the future, the Company could be required to revise its estimates of the valuation allowances against its deferred tax assets and adjust its provisions for additional income taxes.

The Company’s effective tax rate generally differs from the U.S. federal statutory rate of 35% due primarily to lower tax rates on earnings generated by the Company’s foreign operations that are taxed primarily in Switzerland. The Company has not provided for U.S. taxes for those earnings because it plans to reinvest all of those earnings indefinitely outside the United States. From time to time, there may be other items that impact the Company's effective tax rate, such as the items specific to the current period discussed above.