Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property Plant And Equipment [Abstract]

Schedule of Carrying Value of Property, Plant and Equipment

The carrying value of property, plant and equipment is as follows:

(Thousands)	Depreciable Lives			March 31, 2018			December 31, 2017
Land	Indefinite			$	27,332		$	27,110
Building and improvements	3 - 40 years				333,945			333,121
Real property interests		(1	)		34,580			34,580
Poles	30 years				244,766			243,710
Fiber	30 years				2,723,670			2,671,216
Equipment	5 - 7 years				208,355			201,490
Copper	20 years				3,677,480			3,656,384
Conduit	30 years				91,210			91,210
Tower assets	20 years				68,155			59,610
Capital lease assets		(1	)		92,974			93,465
Other assets	15 - 20 years				10,381			10,232
Corporate assets	3 - 7 years				8,262			7,970
Construction in progress		(1	)		124,611			112,489
					7,645,721			7,542,587
Less accumulated depreciation					(4,596,007	)		(4,488,698	)
Net property, plant and equipment				$	3,049,714		$	3,053,889
(1) See our Annual Report for property, plant and equipment accounting policies.