Summary Financial Information (Statement of Financial Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Stated interest rate percentage	3.00%	3.00%
Current assets:
Cash and cash equivalents	$ 63,021	$ 77,591	$ 51,603	$ 63,056
Trade accounts receivable, less allowance for doubtful accounts	127,806	111,569
Inventories	152,886	130,643
Prepaid expenses and other	16,582	21,147
Total current assets	360,295	340,950
Net property, plant, and equipment	113,079	113,028
Goodwill	347,434	319,299
Other intangibles, net	263,764	256,183
Marketable securities	7,673	7,686
Deferred taxes on income	32,442	61,857
Other assets	17,759	14,840
Total assets	1,142,446	1,113,843	772,851
Trade accounts payable	46,970	40,994
Accrued liabilities	99,963	97,397
Current portion of long-term debt	60,064	52,568
Total current liabilities	206,997	190,959
Senior debt, less current portion	33	41
Other non-current liabilities	223,966	212,783
Total liabilities	734,217	772,493
Total shareholders’ equity	408,229	341,350	$ 286,309	$ 268,719
Total liabilities and shareholders’ equity	$ 1,142,446	$ 1,113,843