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Network
1080 - Disclosure - Income Taxes - Additional Information (Detail)
(http://www.adtran.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation)
TableComponents Of Income Before Taxes [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000926282 (http://www.sec.gov/CIK)
Components Of Income Before Taxes [Line Items]Period [Axis]
2013-01-01 - 2013-12-31
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
2010-12-31
Range [Axis]Range [Axis]Range [Axis]Range [Axis]
Minimum [Member]Maximum [Member]Range [Member]Range [Member]Range [Member]Range [Member]
Deferred tax expense (benefit) provision recorded as an adjustment to other comprehensive income
 
 
400,000  
33,000  
 
 
Foreign and domestic loss, unamortized research and development cost and state credit carry-forwards
 
 
19,000,000  
 
 
 
Operating loss carry forwards expiration year
2014  
2030  
 
 
 
 
Income tax benefit from exercise of stock options
 
 
169,000  
1,905,000  
10,525,000  
 
Unrecognized tax benefits
 
 
3,240,000  
2,926,000  
2,970,000  
2,593,000  
Unrecognized tax benefits, effective tax rate
 
 
2,500,000  
2,200,000  
2,400,000  
 
Accrued interest and penalties
 
 
1,000,000  
800,000  
1,200,000