Goodwill (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill [Abstract]

Schedule of Goodwill

Goodwill by segment is as follows (in thousands):

	December 31,
	2016		2015
Electric	$	243,558	$	243,558
Natural gas	114,028		114,028
Total	$	357,586	$	357,586