Distributions To Unitholders (Details)							3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	60 Months Ended
	Oct. 31, 2016 $ / shares	Aug. 10, 2016 $ / shares	May 10, 2016 $ / shares	Feb. 29, 2016 $ / shares	Feb. 09, 2016 $ / shares	Nov. 30, 2015 $ / shares	Sep. 30, 2016 shares	Jun. 30, 2015 $ / shares	Dec. 31, 2009 $ / shares	Dec. 31, 2015 shares	Dec. 31, 2014 $ / shares	Mar. 31, 2016
Paid-in-kind units distributed | shares										549,756
Class A preferred units converted to common shares, conversion ratio							1					1
Common Units
Distribution paid per unit				$ 0.406		$ 0.400		$ 0	$ 0		$ 0
Distribution declared per unit		$ 0.4183	$ 0.4121		$ 0.406
Common Units | Subsequent Event
Distribution declared per unit	$ 0.4246
Class A Preferred
Paid-in-kind units distributed | shares							0
Distributions declared as a percentage					2.50%
Distributions paid as a percentage				2.50%
Class B Preferred
Distribution paid per unit				$ 0.3815
Distribution declared per unit		$ 0.450	$ 0.450		$ 0.3815
Class B Preferred | Subsequent Event
Distribution declared per unit	$ 0.45