Goodwill and Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010 Predecessor
Aggregate amortization expense of other definite lived intangible assets
Aggregate amortization expense of other definite lived intangible assets	$ 43,960	$ 44,086	$ 15,841
Estimated amortization expense
2013	45,000
2014	45,000
2015	45,000
2016	45,000
2017	$ 45,000