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Income Taxes | 9 Months Ended
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Sep. 28, 2014
Income Taxes | P. Income Taxes The effective tax rate for the three months ended September 28, 2014 and September 29, 2013 was 18% and 21%, respectively. The decrease in the tax rate was primarily due to a more favorable geographic mix of income partially offset by an increase in reserves for uncertain tax positions. The effective tax rate for the nine months ended September 28, 2014 and September 29, 2013 was 16% and 14%, respectively. The increase in the tax rate was primarily due to income tax expense for the nine months ended September 29, 2013 being reduced for a discrete tax benefit from the January 2013 reinstatement of the U.S. research and development credit for fiscal year 2012 and an increase in reserves for uncertain tax positions in fiscal year 2014, partially offset by a more favorable geographic mix of income in fiscal year 2014. The effective tax rate for each of these periods is lower than the 35% U.S. statutory federal tax rate primarily due to the geographic mix of income and profits earned by Teradyne’s international subsidiaries being taxed at rates lower than the U.S. statutory rate. As of September 28, 2014, Teradyne had $31.6 million of reserves for uncertain tax positions. As of December 31, 2013, Teradyne had $21.2 million of reserves for uncertain tax positions. The $10.4 million net increase in reserves for uncertain tax positions primarily relates to the allocation of income among jurisdictions. As of September 28, 2014, Teradyne anticipates the liability for uncertain tax positions could decrease by approximately $2.8 million over the next twelve months, primarily as a result of the expiration of statutes of limitations and clarification of tax laws. The potential decrease is primarily related to equity compensation. Teradyne qualifies for a tax holiday in Singapore by fulfilling the requirements of an agreement with the Singapore Economic Development Board under which certain headcount and spending requirements must be met. The tax savings due to the tax holiday for the nine months ended September 28, 2014 were $12.3 million or $0.05 per diluted share. The tax holiday is currently expected to expire on December 31, 2015.

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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 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 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=6907707&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=6907707&loc=d3e32537-109319 Reference 6: 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=6907707&loc=d3e32559-109319 + Details
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