Consolidated Statements of Changes in Members' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Units	Subordinated Units	Managing Member Interest
Balance at Mar. 31, 2012	$ 690,390	$ 391,585	$ 287,105	$ 11,700
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(52,742)	(26,109)	(25,589)	(1,044)
Distributions to unitholders	(23,865)	(23,762)	370	(473)
Balance at Sep. 30, 2012	613,783	341,714	261,886	10,183
Balance at Mar. 31, 2013	597,377	321,642	265,877	9,858
Increase (Decrease) in Stockholders' Equity
Cancellation of subordinated units			(265,877)	265,877
Net income (loss)	123	119		4
Distributions to unitholders	(27,261)	(26,721)		(540)
Issuance of common units	5,947	5,947
Balance at Sep. 30, 2013	$ 576,186	$ 300,987		$ 275,199