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
Excess and obsolete inventory reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning	$ 18,040	$ 18,900	$ 19,859
Additions Charged to Expense	2,522	3,586	1,648
Additions from Acquisitions	0	0	32
Reductions from Reserves	(3,176)	(4,392)	(2,639)
Other	(2)	(54)	0
Balance, ending	17,384	18,040	18,900
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for doubtful accounts expense	4,324	3,556	3,006
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning	6,300	6,273	7,121
Additions from Acquisitions	0	0	12
Reductions from Reserves	(4,674)	(3,531)	(3,866)
Other	(1)	2	0
Balance, ending	$ 5,949	$ 6,300	$ 6,273