Property, Plant and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment consisted of the following at December 31, 2016 and 2015:

	Estimated Useful Lives	2016		2015
		(in thousands)
Land		$	13,057	$	4,181
Buildings and structures	10 – 40 years	115,960		108,341
Cable and wire	4 – 40 years	235,471		214,721
Equipment and software	2 – 16.7 years	720,830		391,260
Plant in service		1,085,318		718,503
Plant under construction		73,759		36,600
Total property, plant and equipment		1,159,077		755,103
Less accumulated amortization and depreciation		460,955		345,085
Property, plant and equipment, net		$	698,122	$	410,018