Property, Plant and Equipment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jan. 24, 2011
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 2,299,144,000	$ 2,187,529,000
Less: Accumulated depreciation	(1,085,415,000)	(886,237,000)	0
Net property, plant and equipment	1,213,729,000	1,301,292,000
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	34,932,000	35,585,000
Buildings
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	199,159,000	191,348,000
Central office equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	604,621,000	559,304,000
Outside communications plant
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	1,124,865,000	1,091,238,000
Furniture, vehicles and other work equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	224,728,000	197,439,000
Plant under construction
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	90,979,000	93,734,000
Other
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 19,860,000	$ 18,881,000