Short-term Borrowings and Long-Term Debt - Details of Long-Term Debt Table - Total debt (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Short-term Borrowings and Long-Term Debt
Total	$ 1,800,000	$ 1,800,000
Plus: capital lease obligations	2,123	2,870
Less: unamortized debt issuance costs and premium, net	18,113	15,276
Total debt	$ 1,784,010	$ 1,787,594