Condensed Consolidating Financial Information (Details)	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Senior Secured Notes7.625 Percent Due April2019 [Member]	Sep. 30, 2013 Senior Secured Notes7.625 Percent Due April2019 [Member]	Sep. 30, 2011 Senior Secured Notes7.625 Percent Due April2019 [Member]	Jun. 30, 2014 Senior Notes7.25 Percent Due January2019 [Member]	Dec. 31, 2013 Senior Notes7.25 Percent Due January2019 [Member]	Sep. 30, 2013 Senior Notes7.25 Percent Due January2019 [Member]
Long-term debt
Interest rate on secured notes (as a percent)		7.625%	7.625%	7.625%	7.25%	7.25%	7.25%
Ownership percentage	100.00%
Non-guarantor subsidiaries ownership percentage	100.00%
Non-guarantor entities consolidated percentage	3.00%