Indebtedness (Other Long-Term Debt Narrative) (Details) (USD $) In Thousands, unless otherwise specified					9 Months Ended
	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2013 Other long-term debt [Member]	Mar. 31, 2013 Other long-term debt [Member]	Dec. 31, 2013 Weighted Average [Member] Other long-term debt [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 2,105,120	$ 2,607,818	$ 1,175	$ 2,475
Other long-term debt, average interest rate			6.50%
Debt Instrument, Maturity Period					1 year 11 months