Indebtedness (Schedule of Long-Term Debt Maturities) (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Maturities of Long-term Debt [Abstract]
Remainder of fiscal 2016	$ 72	[1]
March 31, 2017	250,256	[1]
March 31, 2018	655,095	[1]
March 31, 2019	0	[1]
March 31, 2020	352,991	[1]
Thereafter	950,000	[1]
Total maturities of long-term debt	2,208,414	[1]
Senior notes, net [Member]
Maturities of Long-term Debt [Abstract]
Unamortized discounts	$ 1,900

[1] Outstanding borrowings under the Securitization Agreement at September 30, 2015 are reflected as maturing at the agreement’s expiration in December 2017. Outstanding borrowings under the Credit Facility at September 30, 2015 are reflected as maturing at the agreement’s expiration in November 2019. The Company’s senior notes are reflected in the debt maturity schedule at their maturity values rather than their carrying values, which are net of aggregate discounts of $1.9 million at September 30, 2015.