Property, Plant and Equipment Phantom (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Asset Retirement Obligation, Accretion Expense	$ 0
Asset Retirement Obligation, Revision of Estimate	0
Asset Retirement Obligation, Liabilities Settled	$ 0
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated life	40 years
Central office equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated life	7 years
Central office equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated life	10 years
Outside communications plant | Minimum
Property, Plant and Equipment [Line Items]
Estimated life	15 years
Outside communications plant | Maximum
Property, Plant and Equipment [Line Items]
Estimated life	35 years
Furniture, vehicles and other work equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated life	5 years
Furniture, vehicles and other work equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated life	15 years