Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 48,429,000	$ 29,660,000	$ 9,106,000
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	41,947,000	41,924,000	28,153,000
Deferred income taxes and related valuation allowance	(300,000)	(1,969,000)	(8,704,000)
Net loss (gain) on sale of real estate, investments and other	(54,000)	136,000	(1,594,000)
Stock-based compensation	10,425,000	11,246,000	8,022,000
Amortization of deferred financing costs	1,721,000	1,703,000	2,646,000
Unrealized Gain (Loss) on Derivatives	(438,000)	853,000	0
Payment for Debt Extinguishment or Debt Prepayment Cost	0	14,803,000	0
Pension Expense (Reversal of Expense), Noncash	0	0	19,038,000
Gain (Loss) on Disposition of Property Plant Equipment	(232,000)	(375,000)	(2,638,000)
Other Operating Activities, Cash Flow Statement	7,867,000	7,945,000	7,447,000
Changes in operating assets and liabilities, net of effects of business acquisitions and divestitures:
Trade accounts receivable	(4,858,000)	(18,988,000)	21,472,000
Inventories	(9,087,000)	(40,201,000)	20,659,000
Prepaid expenses and other	6,667,000	(47,000)	(5,128,000)
Increase (Decrease) in Other Operating Assets	123,000	(25,000)	(874,000)
Trade accounts payable	(13,964,000)	12,681,000	10,343,000
Accrued liabilities	9,150,000	696,000	(3,174,000)
Increase (Decrease) in Other Noncurrent Liabilities	(13,689,000)	(11,211,000)	(7,632,000)
Net cash provided by (used for) operating activities	83,636,000	48,881,000	98,890,000
Proceeds from Sale and Maturity of Marketable Securities	3,651,000	4,434,000	5,111,000
Investing activities:
Capital expenditures	(12,632,000)	(13,104,000)	(12,300,000)
Proceeds from Sales of Assets, Investing Activities	373,000	461,000	5,453,000
Proceeds from Insurance Settlement, Investing Activities	0	482,000	100,000
Proceeds from Equity Method Investment, Distribution, Return of Capital	313,000	324,000	587,000
Proceeds from Sale of Property, Plant, and Equipment	0	0	446,000
Payments to Acquire Restricted Investments	(1,616,000)	(539,778,000)	0
Net Cash Provided by (Used in) Investing Activities	(13,932,000)	(554,311,000)	(5,548,000)
Financing activities:
Proceeds from issuance of common stock	713,000	2,655,000	1,973,000
Proceeds from (Repayments of) Debt, Maturing in More than Three Months	0	0	25,000,000
Repayments of Lines of Credit	0	0	(25,000,000)
Payments for Repurchase of Common Stock	(1,001,000)	0	0
Payments of Dividends	(8,008,000)	(6,562,000)	(5,733,000)
Repayment of debt	(40,550,000)	(477,846,000)	(4,450,000)
Payments of Financing Costs	0	0	(826,000)
Proceeds from Issuance of Long-term Debt	0	725,000,000	0
Proceeds from Issuance or Sale of Equity	0	207,000,000	0
Debt Related Commitment Fees and Debt Issuance Costs	0	(26,184,000)	0
Proceeds from Derivative Instrument, Financing Activities	24,495,000	19,417,000	0
Payments for Derivative Instrument, Financing Activities	(24,221,000)	(20,206,000)	0
Other	(1,415,000)	(2,574,000)	(1,153,000)
Net cash provided by (used for) financing activities	(49,987,000)	420,700,000	(10,189,000)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations	(1,931,000)	(2,007,000)	4,524,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	17,786,000	(86,737,000)	87,677,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	133,426,000	115,640,000	202,377,000
Supplementary cash flows data:
Interest Paid, Excluding Capitalized Interest, Operating Activities	26,089,000	18,823,000	9,451,000
Income taxes paid, net of refunds	22,032,000	9,767,000	10,186,000
Property, plant and equipment purchases included in trade accounts payable	624,000	329,000	730,000
Restricted Cash	250,000	250,000	250,000
Payments to Acquire Marketable Securities	(4,021,000)	(7,130,000)	(4,945,000)
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ 175,000	$ 0	$ 0