Restructuring Plans (Acquisition And Non-Acquisition Related Restructuring Reserve) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Acquisition Related Restructuring Reserve [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 403	$ 1,292
Accrued	711	2,546	1,269
Costs incurred	(1,114)	(3,420)
Foreign currency impact and other		(15)	23
Ending Balance		403	1,292
Non-Acquisition Related Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4,920	7,482	10,289
Accrual adjustment	(681)
Accrued	4,958	4,267	12,370
Costs incurred	(7,966)	(6,945)	(15,539)
Foreign currency impact and other	(45)	116	362
Ending Balance	1,186	4,920	7,482
Employee Severance [Member] | Acquisition Related Restructuring Reserve [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	257	1,292
Accrued	81	108	1,269
Costs incurred	(338)	(1,107)
Foreign currency impact and other		(36)	23
Ending Balance		257	1,292
Employee Severance [Member] | Non-Acquisition Related Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4,920	7,482	10,289
Accrual adjustment	(681)
Accrued	4,958	4,267	10,107
Costs incurred	(7,966)	(6,945)	(13,276)
Foreign currency impact and other	(45)	116	362
Ending Balance	1,186	4,920	7,482
Plant Closure And Other [Member] | Acquisition Related Restructuring Reserve [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	146
Accrued	630	2,438
Costs incurred	(776)	(2,313)
Foreign currency impact and other		21
Ending Balance		146
Plant Closure And Other [Member] | Non-Acquisition Related Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Accrued			2,263
Costs incurred			$ (2,263)