Goodwill (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill [Abstract]

Schedule of Goodwill [Table Text Block]

Goodwill by segment is as follows for both September 30, 2016 and December 31, 2015 (in thousands):

Electric	$	243,558
Natural gas	114,028
Total	$	357,586