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173 - Disclosure - Income Taxes - Principal Components of Current and Non-current Deferred Taxes (Detail)
(http://www.adtran.com/taxonomy/role/DisclosureIncomeTaxesPrincipalComponentsOfCurrentAndNoncurrentDeferredTaxes)
TableIncome Tax Expense Benefit [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000926282 (http://www.sec.gov/CIK)
Legal Entity [Axis]Entity [Domain]
Income Tax Expense Benefit [Line Items]Period [Axis]
2012-12-31
2011-12-31
Accounts receivable
2,000  
4,000  
Inventory
7,507,000  
6,709,000  
Accrued expenses
5,546,000  
5,412,000  
Total Current Deferred Tax Assets
13,055,000  
 
12,125,000  
 
Accrued expenses
116,000  
113,000  
Deferred compensation
4,456,000  
3,177,000  
Stock-based compensation
4,569,000  
3,808,000  
Uncertain tax positions related to state taxes and related interest
1,005,000  
947,000  
Pensions
605,000  
 
Foreign and state losses and state credit carry-forwards
11,327,000  
7,891,000  
Federal loss and research carry-forwards
12,210,000  
14,778,000  
Valuation allowance
(10,939,000) 
(7,585,000) 
Total Non-current Deferred Tax Assets
23,349,000  
 
23,129,000  
 
Total Deferred Tax Assets
36,404,000  
 
35,254,000  
 
Accumulated depreciation
(6,405,000) 
(7,081,000) 
Intellectual property
(1,839,000) 
(2,594,000) 
Investments
(4,844,000) 
(5,109,000) 
Total Non-current Deferred Tax Liabilities
(13,088,000) 
 
(14,784,000) 
 
Net Deferred Tax Assets
23,316,000  
 
20,470,000