Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income (loss)	$ (5,138)	$ 46,625	$ 48,429
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	48,187	45,945	41,947
Deferred income taxes and related valuation allowance	(20,256)	(15,285)	(300)
Net loss (gain) on sale of real estate, investments and other	(972)	(1,431)	(54)
Stock-based compensation	6,256	12,039	10,425
Amortization of deferred financing costs	2,487	2,349	1,721
Loss (gain) on hedging instruments	(382)	(1,366)	(438)
Cost of debt repricing	0	958	0
Impairment of operating lease	3,911	0	0
Loss on disposals and impairments of fixed assets	2,533	0	175
Non-cash pension settlement expense (See Note 13)	23,634	4,984	0
Gain on sale of building (See Note 3)	0	0	(232)
Non-cash lease expense	10,105	9,735	7,867
Changes in operating assets and liabilities, net of effects of business acquisitions and divestitures:
Trade accounts receivable	4,482	(14,428)	(4,858)
Inventories	(13,042)	(1,314)	(9,087)
Prepaid expenses and other	(20,998)	(8,555)	6,667
Other assets	3,498	537	(123)
Trade accounts payable	11,144	4,748	(13,964)
Accrued liabilities	(250)	(9,583)	9,150
Non-current liabilities	(9,587)	(8,760)	(13,689)
Net cash provided by (used for) operating activities	45,612	67,198	83,636
Investing activities:
Proceeds from sales of marketable securities	5,057	3,526	3,651
Purchases of marketable securities	(3,676)	(4,076)	(4,021)
Capital expenditures	(21,411)	(24,813)	(12,632)
Proceeds from sale of building, net of transaction costs	0	0	373
Dividend received from equity method investment	0	144	313
Proceeds from sale of fixed assets	139	0	0
Purchase of businesses, net of cash acquired (See Note 3)	0	(108,145)	(1,616)
Net cash provided by (used for) investing activities	(19,891)	(133,364)	(13,932)
Financing activities:
Proceeds from issuance of common stock	371	1,600	713
Fees paid for debt repricing	(169)	(958)	0
Purchases of treasury stock	(10,000)	0	(1,001)
Repayment of debt	(60,670)	(60,604)	(40,550)
Payment to former owners of montratec (see Note 3)	(6,711)	0	0
Fees paid for borrowing on long-term debt	0	(2,859)	0
Proceeds from issuance of long-term debt	0	120,000	0
Cash inflows from hedging activities	23,608	24,057	24,495
Cash outflows from hedging activities	(23,134)	(22,687)	(24,221)
Payment of dividends	(8,042)	(8,044)	(8,008)
Other	(2,000)	(2,304)	(1,415)
Net cash provided by (used for) financing activities	(86,747)	48,201	(49,987)
Effect of exchange rate changes on cash	583	(1,085)	(1,931)
Net change in cash and cash equivalents	(60,443)	(19,050)	17,786
Cash, cash equivalents, and restricted cash at beginning of year	114,376	133,426	115,640
Cash, cash equivalents, and restricted cash at end of year	53,933	114,376	133,426
Supplementary cash flows data:
Interest paid	30,054	34,983	26,089
Income taxes paid, net of refunds	20,520	28,369	22,032
Property, plant and equipment purchases included in trade accounts payable	318	690	624
Restricted cash presented in Other assets	$ 250	$ 250	$ 250