Short-Term Borrowing Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Short-term Debt [Line Items]
Short-term debt	$ 330,254	$ 212,669
Unused lines of credit	669,428
Compensating balance	2,122	444
Line of Credit [Member]
Short-term Debt [Line Items]
Short-term debt, maximum outstanding amount	$ 795,746	$ 773,471
Short-term debt, weighted average interest rate	5.10%	4.30%
Short-term debt	$ 330,254	$ 212,669
Unused lines of credit	448,265	544,869
Inventory pledged as collateral	56,210	17,415
Compensating balance	2,122	444
Letter of Credit [Member]
Short-term Debt [Line Items]
Unused lines of credit	17,227
Non-US Based [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term debt	$ 61,820	$ 18,598