Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2015

Related Party Transactions [Abstract]

Schedule of Related Party Transactions [Table Text Block]

	Year Ended
	December 31, 2015		December 31, 2014		December 31, 2013
	(In thousands)
Indirect charges:
Operating and maintenance expenses	$	38,363	$	32,452	$	11,912
Selling, general and administrative expenses	8,496		7,684		17,661
Total indirect charges	$	46,859	$	40,136	$	29,573