Summary of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Schedule of Accrued Liabilities [Line Items]
Payroll and benefits	$ 52,484	$ 55,595
Accrued selling expenses	28,896	26,269
Warranty	20,079	19,274
Income taxes payable	19,273	16,979
Freight	11,768	12,314
VAT and other non-income taxes	10,438	10,966
Deferred income	7,789	12,057
Lead forward contracts	2,832
Interest	2,171	2,040
Pension and social security	1,787	1,696
Restructuring	1,959	1,186
Interest rate swaps	654	3,628
Other	31,534	26,399
Total	$ 191,664	$ 188,403