Goodwill and Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets
Aggregate amortization expense of definite lived intangible assets	$ 11,644	$ 11,358
Estimated amortization expense
2016	49,000
2017	49,000
2018	49,000
2019	49,000
2020	49,000
Selling, General and Administrative Expenses
Intangible Assets
Aggregate amortization expense of definite lived intangible assets	$ 11,644	$ 11,358