Indebtedness (Schedule Of Long-Term Debt Maturities) (Details) (USD $)	Mar. 31, 2014
Years Ending March 31, [Abstract]
2015	$ 400,370,000	[1]
2016	250,350,000	[1]
2017	607,507,000	[1]
2018	325,095,000	[1]
2019	0	[1]
Thereafter	525,000,000	[1]
Total maturities of long-term debt	2,108,322,000	[1]
Senior Notes, Net [Member]
Years Ending March 31, [Abstract]
Unamortized discounts	$ 1,200,000

[1] Outstanding borrowings under the Securitization Agreement at March 31, 2014 are reflected as maturing at the agreement’s expiration in December 2016.The 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 $1.2 million at March 31, 2014.