Property, Plant and Equipment

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment consisted of the following:

(in thousands)	Estimated Useful Lives	March 31, 2019		December 31, 2018
Land		$	6,937	$	6,723
Buildings and structures	10 - 40 years	222,052		213,657
Cable and wire	4 - 40 years	322,403		309,928
Equipment and software	2 - 17 years	803,661		791,401
Plant in service		1,355,053		1,321,709
Plant under construction		74,675		81,409
Total property, plant and equipment		1,429,728		1,403,118
Less accumulated amortization and depreciation		727,748		701,759
Property, plant and equipment, net		$	701,980	$	701,359