Pension Plan and Other Postretirement Benefits - Assumptions (Details) - NTELOS Holdings Corp. [Member]	8 Months Ended
Dec. 31, 2016	May 06, 2016
Defined Benefit Pension Plan [Member]
Weighted average assumptions used in measurement of benefit obligations [Abstract]
Discount rate		3.85%
Defined Benefit Pension Plan [Member] \| Scenario, Forecast [Member]
Weighted average assumptions used in measurement of net cost [Abstract]
Discount rate	3.85%
Expected return on plan assets	6.75%
Other Postretirement Benefit Plans [Member]
Weighted average assumptions used in measurement of benefit obligations [Abstract]
Discount rate		3.85%
Other Postretirement Benefit Plans [Member] \| Scenario, Forecast [Member]
Weighted average assumptions used in measurement of net cost [Abstract]
Discount rate	3.85%
Expected return on plan assets	0.00%

The interest rate used to adjust for the time value of money for the plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

The interest rate used to adjust for the time value of money.

+ References

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- References

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