Supplemental Cash Flow Information (Cash Paid For Interest And Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 86,479	$ 66,569	$ 67,756
Income taxes (net of refunds)	$ 164,482	$ 133,951	$ 94,976