Accounting for Income Taxes	9 Months Ended
Accounting for Income Taxes	Sep. 30, 2019
Notes To Financial Statements [Abstract]
Accounting for Income Taxes	Accounting for Income Taxes Our provision for income taxes was $25.9 million and $24.6 million for the three months ended September 30, 2019 and 2018, respectively, representing effective tax rates of 20.2% and 19.4%, respectively. Our provision for income taxes was $77.8 million and $35.2 million for the nine months ended September 30, 2019 and 2018, respectively, representing effective tax rates of 19.1% and 10.2%, respectively. Our effective tax rate differs from the statutory federal income tax rate of 21% for the three and nine months ended September 30, 2019 mainly as a result of certain foreign earnings, primarily from the Netherlands and Costa Rica, being taxed at lower tax rates and the recognition of excess tax benefits related to stock-based compensation, partially offset by non-deductible officers’ compensation. Our effective tax rate differs from the statutory federal income tax rate of 21% for the three and nine months ended 2018 mainly as a result of the recognition of excess tax benefits related to stock-based compensation, tax benefits recognized related to a statute of limitations expiration, and certain foreign earnings, primarily from the Netherlands and Costa Rica, being taxed at lower tax rates, partially offset by unfavorable tax impact of the TCJA, including non-deductible officers’ compensation. The increase in our effective tax rate for the three and nine months ended September 30, 2019 compared to the same periods in 2018 is primarily attributable to reduced excess tax benefits from stock-based compensation mainly due to non-deductible officers’ compensation and tax benefits recorded last year as a result of expiration of statute limitations that did not recur in 2019. For the three and nine months ended September 30, 2019, we recognized excess tax benefits of $0.4 million and $13.5 million, respectively, in our provision for income taxes. We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes and for purposes of assessing our ability to utilize any future benefit from deferred tax assets. We file U.S. federal, U.S. state, and non-U.S. income tax returns. Our major tax jurisdictions include U.S. federal, the State of California and the Netherlands. For U.S. federal and state tax returns, we are no longer subject to tax examinations for years before 2015. We are currently under examination by the IRS for tax years 2015 and 2016. With few exceptions, we are no longer subject to examination by foreign tax authorities for years before 2012. Our total gross unrecognized tax benefits, excluding interest and penalties, was $46.0 million and $33.3 million as of September 30, 2019 and December 31, 2018, respectively, a material amount of which would impact our effective tax rate if recognized. Our total interest and penalties accrued as of September 30, 2019 was $1.6 million. We have elected to recognize interest and penalties related to unrecognized tax benefits as a component of income taxes. The timing and resolution of income tax examinations is uncertain, and the amounts ultimately paid, if any, upon resolution of issues raised by the taxing authorities may differ materially from the amounts accrued for each year. Although it is possible that our balance of gross unrecognized tax benefits could materially change in the next 12 months, given the uncertainty in the development of ongoing income tax examinations, we are unable to estimate the full range of possible adjustments to this balance. As of December 31, 2018, our undistributed earnings of our foreign subsidiaries totaled $533.5 million. As a result of the TCJA, during the year ended December 31, 2017, we provided for U.S. income taxes on undistributed foreign earnings through December 31, 2017, and we have reassessed our capital needs and investment strategy with regard to the indefinite reinvestment, determining that certain of those are no longer indefinitely reinvested. Of the total undistributed foreign earnings as of December 31, 2018, the amount that is not indefinitely reinvested is $239.2 million. The remaining amount of undistributed foreign earnings of approximately $294.3 million continues to be indefinitely reinvested in our international operations. Since U.S. income taxes have already been provided under the Global Intangible Low-Taxed Income (“GILTI”) provisions of the TCJA, the additional tax impact of the distribution of such foreign earnings to the U.S. parent company would be limited to withholding taxes and is not significant. In June 2017, the Costa Rica Ministry of Foreign Trade, an agency of the Government of Costa Rica, granted an extension of certain income tax incentives for an additional twelve year period. Under these incentives, all of the income in Costa Rica is subject to a reduced tax rate. In order to receive the benefit of these incentives, we must hire specified numbers of employees and maintain certain minimum levels of fixed asset investment in Costa Rica. If we do not fulfill these conditions for any reason, our incentive could lapse and our income in Costa Rica would be subject to taxation at higher rates which could have a negative impact on our operating results. The Costa Rica corporate income tax rate that would apply, absent the incentives, is 30% for 2019 and 2018. For the three and nine months ended September 30, 2019, the reduction in income taxes due to the reduced tax rate was minimal.