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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2012
Income Tax Disclosure [Abstract]  
Income taxes receivable (payable)
December 31,2012 2011
(Dollars in thousands)     
Federal income taxes receivable (payable)$ (5,455) $ 77,238
State income taxes receivable  9,625   8,398
Income tax expense (benefit)
Year Ended December 31, 2012 2011 2010
(Dollars in thousands)        
Current        
 Federal$ 9,705 $ (94,627) $ 24,329
 State  5,092   5,583   (5,532)
Deferred        
 Federal  61,113   214,722   67,466
 State  (2,328)   (12,175)   8,925
   $ 73,582 $ 113,503 $ 95,188
Income tax reconciliation
Year Ended December 31,2012  2011  2010 
  Amount Rate  Amount Rate  Amount Rate 
(Dollars in millions)                 
Statutory federal income tax expense and rate$ 68.7  35.0% $ 127.3  35.0% $ 100.0  35.0%
State income taxes, net of federal benefit (1)  8.4  4.2    (20.9)  (5.7)    2.7  1.0 
Effect of noncontrolling interests  -   -     (3.0)  (0.8)    (4.0)  (1.4) 
Correction of deferred taxes (2)  (6.1)  (3.1)    6.0  1.6    -   -  
Other differences, net  2.6  1.4    4.1  1.1    (3.5)  (1.3) 
Total income tax expense and rate$ 73.6  37.5% $ 113.5  31.2% $ 95.2  33.3%
                   
(1)Net state income taxes include changes in the valuation allowance. The 2011 benefit primarily relates to the ability to utilize net operating losses as a result of state income tax law changes. In addition, state tax benefits related to the settlement of state tax audits and the expiration of statutes of limitations are included in 2012, 2011 and 2010.
                   
(2)TDS recorded immaterial adjustments to correct deferred tax balances in 2012 and 2011 related to tax basis adjustments and law changes that related to periods prior to 2012 and 2011, respectively.
Temporary income tax differences
December 31,2012 2011
(Dollars in thousands)     
Noncurrent deferred tax assets     
 Net operating loss (NOL) carryforwards $ 121,111 $ 103,709
 Stock-based compensation  53,330   46,410
 Compensation and benefits - other  32,484   17,314
 Deferred rent  16,862   13,897
 Other  32,654   20,246
     256,441   201,576
 Less valuation allowance  (69,108)   (48,714)
 Total noncurrent deferred tax assets  187,333   152,862
Noncurrent deferred tax liabilities     
 Property, plant and equipment  666,201   608,669
 Licenses/intangibles  250,860   224,817
 Partnership investments  127,331   123,898
 Other  5,521   4,191
 Total noncurrent deferred tax liabilities  1,049,913   961,575
Net noncurrent deferred income tax liability$ 862,580 $ 808,713
Deferred tax valuation allowance
A summary of TDS' deferred tax asset valuation allowance is as follows:
           
   2012 2011 2010
(Dollars in thousands)        
Balance at January 1,$ 49,686 $ 71,014 $ 63,870
 Charged to income tax expense  5,268   (28,511)   (293)
 Charged to other accounts  15,548   7,183   7,437
Balance at December 31,$ 70,502 $ 49,686 $ 71,014
           
As of December 31, 2012, the valuation allowance reduced current deferred tax assets by $1.4 million and noncurrent deferred tax assets by $69.1 million.
Income tax unrecognized benefits summary
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
           
   2012 2011 2010
(Dollars in thousands)        
Unrecognized tax benefits balance at January 1,$ 28,841 $ 34,002 $ 45,034
 Additions for tax positions of current year  7,027   4,369   5,271
 Additions for tax positions of prior years  1,673   171   179
 Reductions for tax positions of prior years  (7)   (1,973)   (3,517)
 Reductions for settlements of tax positions  (21)   (976)   (12,549)
 Reductions for lapses in statutes of limitations  (9,093)   (6,752)   (416)
Unrecognized tax benefits balance at December 31,$ 28,420 $ 28,841 $ 34,002