Partnership Organization (Details Textual 1) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Senior Notes [Member]	Sep. 30, 2010 Senior Notes [Member]	Sep. 30, 2012 8.875% Senior Notes [Member]	Sep. 30, 2011 8.875% Senior Notes [Member]
Partnership Organization (Textual) [Abstract]
Outstanding senior notes	$ 124,357	$ 124,263	$ 125,000
Interest on senior notes				10.25%	8.875%	8.875%
Maturity of senior notes			2017