Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	15. Income Taxes Income tax expense for the three months ended September 30, 2017 and 2016, was $4.8 million and $14.4 million, respectively, and for the nine months ended September 30, 2017 and 2016, was $65.2 million and $50.0 million, respectively, which resulted primarily from applying the federal statutory income tax rate to income before income taxes. The Company’s effective tax rates for the current period differs from the U.S. federal statutory rate of 35% due primarily to the effect of Subpart F income as result of the product acquisition triggering U.S. tax on the Company’s pro rata share of income earned by Noden as a controlled foreign corporation. The Company intends to indefinitely reinvest all of its undistributed foreign earnings outside of the United States. The uncertain tax positions increased during the three months ended September 30, 2017 and 2016, by zero and $0.6 million, respectively, and increased during the nine months ended September 30, 2017 and 2016, by $29.7 million and $2.4 million, respectively, resulting from an increase in tax uncertainties and estimated tax liabilities. The Company’s income tax returns are subject to examination by U.S. federal, state and local tax authorities for tax years 1996 forward. In May 2012, the Company received a “no-change” letter from the Internal Revenue Service (“IRS”) upon completion of an examination of the Company’s 2008 federal tax return. The Company is currently under income tax examination in the state of California for the tax years 2009 through 2015. Although the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year, the Company does not anticipate any material change to the amount of its unrecognized tax benefit over the next 12 months.

Income Taxes

9 Months Ended

Sep. 30, 2017

15. Income Taxes

Income tax expense for the three months ended September 30, 2017 and 2016, was $4.8 million and $14.4 million, respectively, and for the nine months ended September 30, 2017 and 2016, was $65.2 million and $50.0 million, respectively, which resulted primarily from applying the federal statutory income tax rate to income before income taxes. The Company’s effective tax rates for the current period differs from the U.S. federal statutory rate of 35% due primarily to the effect of Subpart F income as result of the product acquisition triggering U.S. tax on the Company’s pro rata share of income earned by Noden as a controlled foreign corporation. The Company intends to indefinitely reinvest all of its undistributed foreign earnings outside of the United States.

The uncertain tax positions increased during the three months ended September 30, 2017 and 2016, by zero and $0.6 million, respectively, and increased during the nine months ended September 30, 2017 and 2016, by $29.7 million and $2.4 million, respectively, resulting from an increase in tax uncertainties and estimated tax liabilities.

The Company’s income tax returns are subject to examination by U.S. federal, state and local tax authorities for tax years 1996 forward. In May 2012, the Company received a “no-change” letter from the Internal Revenue Service (“IRS”) upon completion of an examination of the Company’s 2008 federal tax return. The Company is currently under income tax examination in the state of California for the tax years 2009 through 2015. Although the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year, the Company does not anticipate any material change to the amount of its unrecognized tax benefit over the next 12 months.