Accrued Liabilities and Other Non-current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Accrued Liabilities [Abstract]
Accrued payroll	$ 36,946	$ 37,391
Accrued income taxes payable	12,864	5,568
Accrued health insurance	2,806	1,606
Accrued general and product liability costs	3,500	3,500
Customer advances, deposits, and rebates	14,922	18,911
Other accrued liabilities	28,266	32,987
Accrued liabilities	99,304	99,963
Liability, Other Postretirement Defined Benefit Plan, Noncurrent	2,022	2,835
Standard Product Warranty Accrual, Noncurrent	9,186	10,082
Liability, Defined Benefit Pension Plan, Noncurrent	127,373	131,725
Investment Foreign Currency, Contract, Amount Purchased	15,410	38,209
Deferred income tax	20,082	30,262
Other Sundry Liabilities, Noncurrent	9,741	10,853
Other non-current liabilities	$ 183,814	$ 223,966