Rendering

Component: (Network and Table)
Network
100830 - Disclosure - Income Taxes - Change in Unrecognized Income Tax Benefits (Detail)
(http://www.adtran.com/20161231/taxonomy/role/DisclosureIncomeTaxesChangeInUnrecognizedIncomeTaxBenefitsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000926282 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Balance at beginning of period
2,537,000  
3,334,000  
3,240,000  
Increases for tax position related to, Prior years
95,000  
  
Increases for tax position related to, Current year
428,000  
280,000  
522,000  
Decreases for tax positions related to, Prior years
 
(29,000) 
 
Settlements with taxing authorities
 
(103,000) 
 
Expiration of applicable statute of limitations
(834,000) 
(945,000) 
(428,000) 
Balance at end of period
2,226,000  
 
2,537,000  
 
3,334,000