Pension Plan and Other Postretirement Benefits - Narrative (Details) - NTELOS Holdings Corp. [Member] $ in Thousands		9 Months Ended	12 Months Ended
	May 06, 2016 USD ($) bond_fund	Sep. 30, 2016 USD ($)	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Assumed annual rate increase in per capita cost of covered health care benefits			8.00%
Assumed annual rate decrease in per capita cost of covered health care benefits for the next five years		0.50%
Assumed annual rate per capita cost of covered health care benefits, for year 2022 and thereafter			5.00%
Effect of one percentage point increase on service and interest cost components		$ 100
Effect of one percentage point increase on accumulated postretirement benefit obligation		600
Effect of one percentage point decrease on service and interest cost components		100
Effect of one percentage point decrease on accumulated postretirement benefit obligation		500
Number of bond funds | bond_fund	2
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Holding percentage of one asset in bond fund	4.00%
Holding percentage of one asset in total portfolio	1.00%
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations, at acquisition	$ 37,443
Expected net periodic benefit cost (income)		(100)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations, at acquisition	$ 4,568
Expected net periodic benefit cost (income)		$ 100