Members' Equity/Partners' Capital (EPU) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	2 Months Ended		3 Months Ended		4 Months Ended	6 Months Ended	7 Months Ended	9 Months Ended
	Mar. 05, 2015	Mar. 31, 2015	Mar. 05, 2015	Feb. 28, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Weighted average units outstanding, basic			2,927,613		3,998,209	3,124,004	3,103,608			3,556,675
Weighted average units outstanding, diluted			2,927,613		23,771,370	14,074,856	3,103,608			3,556,675
Assumed net income (loss)		$ (92,578)	$ (923)		$ 9,949	$ 7,350		$ (92,578)	$ (92,578)	$ (17,997)	$ (93,501)
Assumed net income (loss)					$ 28,809
Asset impairments	$ 0			$ 0		$ 937				$ 1,309	$ 84,664
Class A Units
Weighted Average Units Outstanding - Basic and diluted											48,451
Weighted average units outstanding, basic			48,451
Weighted average units outstanding, diluted			48,451
Assumed net income (loss)			$ (18)
Net income (loss) per unit - Basic and diluted			$ (0.38)								$ (0.38)
Class B Units
Weighted Average Units Outstanding - Basic and diluted											2,879,163
Weighted average units outstanding, basic			2,879,163
Weighted average units outstanding, diluted			2,879,163
Assumed net income (loss)			$ (905)
Net income (loss) per unit - Basic and diluted			$ (0.31)								$ (0.31)
Common Units
Weighted average units outstanding, basic					3,998,209	3,124,004	3,103,608			3,556,675	3,103,608
Weighted average units outstanding, diluted					23,771,370	14,074,856	3,103,608			3,556,675	3,103,608
Assumed net income (loss)					$ 9,949					$ (17,997)
Assumed net income (loss)					$ 28,809
Net income (loss) per unit - Basic and diluted									$ (2.98)	$ (5.06)
Basic earnings per unit					$ 2.49	$ 2.33				(5.06)	$ (29.83)
Diluted earnings per unit					$ 1.21	$ 0.55				$ (5.06)	$ (29.83)