Consolidated Statement of Stockholders Equity - USD ($)	Total	Directors	Common Stock ($0.01 par value)	Common Stock ($0.01 par value) Directors	Additional  Paid-in Capital	Additional  Paid-in Capital Directors	Retained Earnings	Retained Earnings Directors	Accumulated Other  Comprehensive  Loss	Accumulated Other  Comprehensive  Loss Directors
Opening Balance at Mar. 31, 2019	$ 431,159,000		$ 234,000		$ 277,518,000		$ 236,459,000		$ (83,052,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	59,672,000		0		0		59,672,000		0
Payments of Dividends	(5,690,000)		0		0		5,690,000		0
Change in foreign currency translation adjustment	(9,004,000)		0		0		0		(9,004,000)
Change in derivatives qualifying as hedges, net of tax	1,602,000		0		0		0		1,602,000
Change in pension liability and postretirement obligations, net of tax	(23,896,000)		0		0		0		(23,896,000)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	4,047,000	$ 460,000	0	$ 0	4,047,000	$ 460,000	0	$ 0	0	$ 0
Stock Issued During Period, Value, Stock Options Exercised	6,000,000		3,000		5,997,000		0		0
Restricted stock units released, shares, net of shares withheld for minimum statutory tax obligation	(765,000)		1,000		(766,000)		0		0
closing balance at Mar. 31, 2020	463,585,000		238,000		287,256,000		290,441,000		(114,350,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in derivatives qualifying as hedges, tax	(565,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ 8,010,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	296,027
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	82,861
Net income	$ 9,106,000		0		0		9,106,000		0
Payments of Dividends	(5,745,000)		0		0		5,745,000		0
Change in foreign currency translation adjustment	12,583,000		0		0		0		12,583,000
Change in derivatives qualifying as hedges, net of tax	96,000		0		0		0		96,000
Change in pension liability and postretirement obligations, net of tax	41,685,000		0		0		0		41,685,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	7,482,000	540,000	0	0	7,482,000	540,000	0	0	0	0
Stock Issued During Period, Value, Stock Options Exercised	1,973,000		2,000		1,971,000		0		0
Restricted stock units released, shares, net of shares withheld for minimum statutory tax obligation	(1,156,000)		0		(1,156,000)		0		0
closing balance at Mar. 31, 2021	530,149,000		240,000		296,093,000		293,802,000		(59,986,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in derivatives qualifying as hedges, tax	(8,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ (13,297,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	97,398
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	115,281
Comprehensive Income Loss Reclassification	$ (25,334,000)
Net income	29,660,000		0		0		29,660,000		0
Payments of Dividends	(7,119,000)
Dividends declared			0		0		(7,119,000)		0
Change in foreign currency translation adjustment	(6,302,000)		0		0		0		(6,302,000)
Change in derivatives qualifying as hedges, net of tax	77,000		0		0		0		77,000
Change in pension liability and postretirement obligations, net of tax	16,312,000		0		0		0		16,312,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	10,287,000	$ 959,000	0	$ 0	10,287,000	$ 959,000	0	$ 0	0	$ 0
Stock Issued During Period, Value, Stock Options Exercised	2,655,000		1,000		2,654,000		0		0
Restricted stock units released, shares, net of shares withheld for minimum statutory tax obligation	(2,580,000)		1,000		(2,581,000)		0		0
closing balance at Mar. 31, 2022	772,803,000		285,000		506,074,000		316,343,000		(49,899,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in derivatives qualifying as hedges, tax	(39,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(5,279,000)
Payments of Stock Issuance Costs	8,340
Proceeds from Other Equity	$ 198,705,000		$ 43,000		$ 198,662,000		$ 0		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	105,132
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	115,402
Comprehensive Income Loss Reclassification	$ 4,930,000