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Component: (Network and Table)
Network
100420 - Disclosure - Nature of Business and Summary of Significant Accounting Policies - Summary of Warranty Expense and Write-Off Activity (Detail)
(http://www.adtran.com/20161231/taxonomy/role/DisclosureNatureOfBusinessAndSummaryOfSignificantAccountingPoliciesSummaryOfWarrantyExpenseAndWriteOffActivityDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000926282 (http://www.sec.gov/CIK)
Accounting Policies [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Accounting Policies [Abstract]
 
 
 
Balance at beginning of period
8,739,000  
8,415,000  
8,977,000  
Plus: Amounts charged to cost and expenses
8,561,000  
2,998,000  
3,103,000  
Less: Deductions
(8,752,000) 
(2,674,000) 
(3,665,000) 
Balance at end of period
8,548,000  
 
8,739,000  
 
8,415,000