Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2017		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 7,261		$ 6,308	$ 4,132	$ 4,684
Charged to Costs and Expenses		(345)		2,847	857
Charged to Other Accounts		1,915		(305)	(365)
Deductions		1,353		366	1,044
Balance at End of Period		7,261		6,308	4,132
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		2,676		2,177	2,155	2,323
Charged to Costs and Expenses		484		(13)	876
Charged to Other Accounts		1,368		401	0
Valuation Allowances and Reserves, Reserves of Businesses Acquired		0
Deductions	[1]	1,353		366	1,044
Balance at End of Period		2,676		2,177	2,155
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		4,585		4,131	1,977	2,361
Charged to Costs and Expenses		(829)		2,860	(19)
Charged to Other Accounts		547	[2]	(706)	(365)
Valuation Allowances and Reserves, Reserves of Businesses Acquired	[2]	736
Deductions		0		0	0
Balance at End of Period		4,585		4,131	1,977
Accrued general and product liability costs
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		13,335		14,535	12,530	$ 14,480
Charged to Costs and Expenses		7,223		5,277	3,726
Charged to Other Accounts		0		0	0
Valuation Allowances and Reserves, Reserves of Businesses Acquired		0		1,523
Deductions	[3]	8,423		4,795	5,676
Balance at End of Period		$ 13,335		$ 14,535	$ 12,530

[1] Uncollectible accounts written off, net of recoveries

[2] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmU4OWQ3NTE0MWI4NDQ4MmE5MjA5MjJlNDMzOWM3MGU5fFRleHRTZWxlY3Rpb246OThCMzA2MkRDREI3QkJERDhGQkYzOTk0ODZBM0U2RjYM}

[3] Insurance claims and expenses paid