Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 35,874	$ 19,352	$ (2,754)
Other comprehensive income (loss):
Cumulative translation adjustments	153	2,926	(1,644)
Recognition of actuarial net gains (losses) from pension and other post-retirement plans, net of tax (benefit) of $824, ($657), and $590	1,937	(1,548)	1,054
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) tax of ($9), ($41), and $39	(29)	(130)	126
Total net change in market value of investments	(29)	(130)	126
Changes in market value of derivatives:
Changes in market value of derivatives, net of tax (benefit) of $19, $66, and ($25)	63	208	(78)
Reclassification adjustment for net (loss) gain included in net income (loss), net of (benefit) tax of ($13), ($73), and $7	(43)	(236)	21
Total net change in market value of derivatives	20	(28)	(57)
Other comprehensive income (loss)	2,081	1,220	(521)
Total comprehensive income (loss)	$ 37,955	$ 20,572	$ (3,275)