Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 4,684		$ 6,180		$ 56,070		$ 49,002
Charged to Costs and Expenses	986		(48,727)		(3,471)
Charged to Other Accounts	(2,230)		(416)		11,804
Deductions	252		747		1,265
Balance at End of Period	4,684		6,180		56,070		49,002
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	2,323		2,256		2,745		3,166
Charged to Costs and Expenses	319		258		844
Charged to Other Accounts	0		0		0
Deductions	252	[1]	747	[1]	1,265	[1]
Balance at End of Period	2,323		2,256		2,745		3,166
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	2,361		3,924		53,325		45,836
Charged to Costs and Expenses	667		(48,985)		(4,315)
Charged to Other Accounts	(2,230)	[2]	(416)		11,804
Deductions	0		0		0
Balance at End of Period	2,361		3,924		53,325		45,836
Accrued general and product liability costs
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	14,480		17,119		20,536		20,576
Charged to Costs and Expenses	3,292		2,185		4,151
Charged to Other Accounts	0		0		0
Deductions	5,931	[3]	5,602	[3]	4,191	[3]
Balance at End of Period	$ 14,480		$ 17,119		$ 20,536		$ 20,576

[1] Uncollectible accounts written off, net of recoveries

[2] Charged against accumulated other comprehensive loss

[3] Insurance claims and expenses paid