Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017		Mar. 31, 2016
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for Doubtful Accounts Receivable, Current		$ 9,645	$ 12,472	[1]	$ 10,357	[1]	$ 11,185	[1]
Provision for Doubtful Accounts	[1]	356	2,183		1,248
Allowance for trade accounts receivable charges to other accounts	[1],[2]	(327)	1,925		11
Allowance for trade accounts receivable deductions	[1],[3]	(2,856)	(1,993)		(2,087)
Inventory Valuation Reserves		19,754	19,639		17,854		18,707
Inventory Write-down	[4]	(673)	2,446		(171)
Foreign currency translation and other adjustments	[2]	788	(661)		(682)
Deferred Tax Assets, Valuation Allowance		13,478	13,596		16,366		16,435
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment		(1,653)	209		(214)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(2,520)	(6,514)		(3,869)
Liability for Claims and Claims Adjustment Expense, Property Casualty Liability		19,742	20,949		22,718		$ 20,222
Supplemental Information for Property, Casualty Insurance Underwriters, Paid Claims and Claims Adjustment Expense		4,456	5,713		5,000
Incurred Claims, Property, Casualty and Liability		(1,158)	(2,563)		(768)
Incurred Claims, Property, Casualty and Liability		(4,505)	(4,919)		(3,272)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense		$ 4,055	$ 3,535		$ 4,014

[1] Net allowance for doubtful accounts and allowance for sales and returns.

[2] Change in foreign currency exchange rates and acquired reserves.

[3] Uncollectible accounts written off, net of recoveries.

[4] Provision for excess and obsolete inventory, net of inventory written off.