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Retirement Plans - Asset Allocation (Details) - USD ($)
$ in Thousands
May 06, 2016
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]    
Fair Value   $ 0
Ntelos Holding, Corp [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual Allocation 100.00%  
Target allocations 100.00%  
Ntelos Holding, Corp [Member] | Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual Allocation 76.00%  
Target allocations, minimum 65.00%  
Target allocations, maximum 75.00%  
Ntelos Holding, Corp [Member] | Bond securities and cash equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Actual Allocation 24.00%  
Target allocations, minimum 25.00%  
Target allocations, maximum 35.00%