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Income Taxes | 3 Months Ended
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Mar. 31, 2017
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes The Company provides for income taxes for each interim period based on the estimated annual effective tax rate for the year, adjusting for discrete items in the quarter in which they arise. The annual effective tax rate before discrete items was 39.1% and 37.0% for the three months ended March 31, 2017 and 2016, respectively. The 2017 annual effective tax rate differed from the statutory rate of 35% primarily due to the unfavorable impact of state income taxes, foreign rate differential, and non-deductible equity charges, which were partially offset by the domestic production activities deduction and the Federal Research & Development credit. Additionally, the Company adopted ASU 2019-16 effective January 1, 2017, as described in Note 1. The 2016 annual effective tax rate differed from the statutory rate of 35% primarily due to the favorable impact of the IRS settlement and release of tax reserves, the domestic production activities deduction, and a calculated benefit in state income taxes, offset by unfavorable items such as non-deductible transaction costs related to the Aesynt transaction, and non-deductible equity charges under ASC 740-718. As of March 31, 2017 and December 31, 2016 , the Company had gross unrecognized tax benefits of $6.9 million and $6.5 million, respectively. It is the Company’s policy to classify accrued interest and penalties as part of the unrecognized tax benefits, but to record interest and penalties in operating expense. As of March 31, 2017 and December 31, 2016, the amount of accrued interest and penalties was $1.0 million and $0.7 million, respectively. As of March 31, 2017, calendar years 2011 and thereafter are open and subject to potential examination in one or more jurisdictions. However, our research credit carryforwards that may be used in future years are subject to adjustment, if and when utilized. As such our federal and California tax years remain open from 2015 and 1992, respectively. During fiscal 2016, the Internal Revenue Service and the Company settled all outstanding items related to the audit of the Company's federal income tax returns for the fiscal years ended December 31, 2014. Although the Company believes it has adequately provided for uncertain tax positions, the provisions on these positions may change as revised estimates are made or the underlying matters are settled or otherwise resolved. It is not possible at this time to reasonably estimate changes in the unrecognized tax benefits within the next twelve months.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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