Interest Expense, Net (Schedule of Interest Expense, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Interest Expense [Abstract]
Interest expense	$ 75,361	$ 70,077	$ 68,846
Interest and finance charge income	(1,663)	(2,583)	(2,509)
Interest expense, net	$ 73,698	$ 67,494	$ 66,337