Goodwill and Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Goodwill and Intangible Assets
Aggregate amortization expense of definite lived intangible assets	$ 46,027	$ 45,753	$ 43,960
Estimated amortization expense
2015	46,000
2016	46,000
2017	46,000
2018	46,000
2019	$ 46,000