Property, Plant and Equipment

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Plant in service	$	1,020,014	$	718,503
Plant under construction	75,976		36,600
	1,095,990		755,103
Less accumulated amortization and depreciation	428,249		345,085
Net property, plant and equipment	$	667,741	$	410,018