Goodwill and Intangible Assets (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets
Aggregate amortization expense of definite lived intangible assets	$ 45,556	$ 46,027	$ 45,753
Estimated amortization expense
2015	46,000
2016	46,000
2017	46,000
2018	46,000
2019	$ 46,000