Short-Term Borrowing Arrangements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Short-term Debt [Line Items]
Short-term debt	$ 356,836	$ 374,532
Unsued lines of credit	462,780
Compensating balance	511	302
Line of Credit [Member]
Short-term Debt [Line Items]
Short-term debt, maximum outstanding amount	647,806	655,154
Short-term debt, weighted average interest rate	4.30%	2.90%
Short-term debt	356,836	374,532
Unsued lines of credit	276,275	266,641
Inventory pledged as collateral	46,246	13,906
Compensating balance	511	302
Letter of Credit [Member]
Short-term Debt [Line Items]
Unsued lines of credit	14,695
Non-US Based [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term debt	$ 81,903	$ 12,938