XML 137 R118.htm IDEA: XBRL DOCUMENT v3.3.1.900
Income Taxes - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Oct. 04, 2015
 [3]
Jul. 05, 2015
 [4]
Apr. 05, 2015
Dec. 31, 2014
Sep. 28, 2014
 [5],[8]
Jun. 29, 2014
 [5]
Mar. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]                        
Income tax expense (benefit) from operations, total $ (8,216,000) [1],[2] $ 15,955,000 $ 29,257,000 $ 9,651,000 $ (21,002,000) [5],[6],[7] $ 17,721,000 $ 20,187,000 $ (2,802,000) $ 46,647,000 $ 14,104,000 $ 36,975,000  
Effective tax rate                 18.40% 14.80% 18.30%  
Tax savings due to the tax holiday                 $ 11,500,000 $ 13,200,000 $ 4,700,000  
Tax savings due to the tax holiday, per share                 $ 0.05 $ 0.06 $ 0.02  
Tax holiday expiration date                 December 31, 2015      
Accrued interest and penalties 500,000       600,000       $ 500,000 $ 600,000    
Interest and penalties related to income tax                 200,000 200,000 $ 200,000  
Valuation allowance amount decrease/increase                 1,300,000      
Valuation allowance includes net deferred tax assets 43,039,000       41,737,000       43,039,000 41,737,000    
U.S. Federal operating loss carryforwards 4,870,000               4,870,000      
Net operating loss carryforward excess tax deductions related to stock based compensation 0               0      
Tax credit carryforwards, approximately 121,200,000               121,200,000      
Tax credits carryforwards 44,684,000       50,554,000       44,684,000 50,554,000    
Unrecognized tax benefits 36,792,000       $ 30,418,000       36,792,000 $ 30,418,000 $ 21,203,000 $ 18,666,000
Unrecognized tax benefits, if recognized would impact effective tax rate 29,200,000               29,200,000      
Unrecognized tax benefits, if recognized would impact valuation allowance 7,600,000               7,600,000      
Decrease in unrecognized tax benefits                 (7,600,000)      
Deferred tax liability not been established 783,000,000               783,000,000      
United States                        
Income Taxes [Line Items]                        
Tax credits carryforwards, business 43,200,000               43,200,000      
Tax credits carryforwards 42,900,000               42,900,000      
State and Local Jurisdiction                        
Income Taxes [Line Items]                        
Tax credits carryforwards 71,400,000               $ 71,400,000      
Earliest Tax Year | United States                        
Income Taxes [Line Items]                        
Tax credit carryforward, expiration date                 2017      
Earliest Tax Year | State and Local Jurisdiction                        
Income Taxes [Line Items]                        
Tax credit carryforward, expiration date                 2016      
Latest Tax Year | United States                        
Income Taxes [Line Items]                        
Tax credit carryforward, expiration date                 2035      
Latest Tax Year | State and Local Jurisdiction                        
Income Taxes [Line Items]                        
Tax credit carryforward, expiration date                 2030      
Do Not Expire                        
Income Taxes [Line Items]                        
Alternative minimum tax credits carryforwards 6,600,000               $ 6,600,000      
Do Not Expire | State and Local Jurisdiction                        
Income Taxes [Line Items]                        
Tax credits carryforwards 42,400,000               42,400,000      
GenRad, Inc.                        
Income Taxes [Line Items]                        
U.S. Federal operating loss carryforwards $ 4,900,000               $ 4,900,000      
[1] In the fourth quarter ended December 31, 2015, Teradyne recorded pension and post retirement net actuarial losses of $17.7 million. See Note B: "Accounting Policies" for a discussion of our accounting policy.
[2] Restructuring and other includes a $5.3 million fair value adjustment to increase the Universal Robots acquisition contingent consideration, and a $(0.3) million fair value adjustment to decrease the AIT acquisition contingent consideration.
[3] Restructuring and other includes a $(1.0) million fair value adjustment to decrease the AIT acquisition contingent consideration.
[4] Restructuring and other includes a $(1.6) million fair value adjustment to decrease the ZTEC acquisition contingent consideration.
[5] Dividends declared by Teradyne's Board of Directors were paid in the second, third and fourth quarters of 2014.
[6] In the fourth quarter ended December 31, 2014, Teradyne recorded a goodwill impairment charge of $98.9 million in its Wireless Test segment.
[7] In the fourth quarter ended December 31, 2014, Teradyne recorded pension and post retirement net actuarial losses of $46.6 million. See Note B: "Accounting Policies" for a discussion of our accounting policy.
[8] Restructuring and other includes a $(0.6) million fair value adjustment to decrease the ZTEC acquisition contingent consideration.