Distributions (Tables)

12 Months Ended

Dec. 31, 2015

Distributions Made to Members or Limited Partners [Abstract]

Schedule of Distributions Made to Members or Limited Partners, by Distribution [Table Text Block]

Distributions we paid during 2013, 2014 and 2015 were as follows (in thousands, except per unit amount):

Payment Date	Per Unit Cash Distribution Amount		Total Cash Distribution
2/14/2013	$	0.5000	$	113,340
5/15/2013	0.5075		115,040
8/14/2013	0.5325		120,707
11/14/2013	0.5575		126,374
Total	$	2.0975	$	475,461
2/14/2014	$	0.5850	$	132,835
5/15/2014	0.6125		139,079
8/14/2014	0.6400		145,324
11/14/2014	0.6675		151,568
Total	$	2.5050	$	568,806
2/13/2015	$	0.6950	$	158,061
5/15/2015	0.7175		163,178
8/14/2015	0.7400		168,296
11/13/2015	0.7625		173,413
Total	$	2.9150	$	662,948