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Income Taxes, Expense (Benefit) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income tax expense (benefit)      
Current federal income tax expense (benefit) $ (87,736)us-gaap_CurrentFederalTaxExpenseBenefit $ 181,579us-gaap_CurrentFederalTaxExpenseBenefit $ 9,705us-gaap_CurrentFederalTaxExpenseBenefit
Current state income tax expense 11,091us-gaap_CurrentStateAndLocalTaxExpenseBenefit 11,614us-gaap_CurrentStateAndLocalTaxExpenseBenefit 5,092us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Deferred federal income tax expense (benefit) 41,851us-gaap_DeferredFederalIncomeTaxExpenseBenefit (65,970)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 61,113us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal - valuation allowance adjustment (10,816)tds_FederalValuationAllowanceDeferredTaxAssetChangeInAmount    
Deferred state income tax expense (benefit) 2,208us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (1,180)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (2,328)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State - valuation allowance adjustment 38,470tds_Statevaluationallowancedeferredtaxassetchangeinamount    
Total income tax expense $ (4,932)us-gaap_IncomeTaxExpenseBenefit $ 126,043us-gaap_IncomeTaxExpenseBenefit $ 73,582us-gaap_IncomeTaxExpenseBenefit