Pension And Other Postretirement Benefit Plans (Benefit Obligations, Plan Assets, And Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, beginning of year	$ 270,349
Plan assets at fair value, end of year	256,013	$ 270,349
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	269,758	289,901
Projected benefit obligation	277,050	297,090	$ 287,082
Projected benefit obligation, beginning of year	297,090	287,082
Service cost	6,674	6,618	5,990
Interest cost	8,754	9,571	10,747
Effect of discount rate change	(18,010)	12,990
Foreign currency exchange rate changes	(1,160)	776
Other	1,736	(3,626)
Benefit payments	(18,034)	(16,321)
Projected benefit obligation, end of year	277,050	297,090	287,082
Plan assets at fair value, beginning of year	270,349	238,450
Actual return on plan assets	864	39,757
Employer contributions	6,147	8,472
Foreign currency exchange rate changes	(3,313)	(9)
Plan assets at fair value, end of year	256,013	270,349	238,450
Funded status of the plans, end of year	(21,037)	(26,741)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	24,957	28,926	30,282
Projected benefit obligation, beginning of year	28,926	30,282
Service cost	170	172	199
Interest cost	950	1,141	1,306
Effect of discount rate change	(1,549)	1,126
Foreign currency exchange rate changes	566	(283)
Other	(1,245)	167
Benefit payments	(2,861)	(3,679)
Projected benefit obligation, end of year	24,957	28,926	30,282
Plan assets at fair value, beginning of year	3,033	3,369
Actual return on plan assets	86	114
Employer contributions	2,448	3,229
Foreign currency exchange rate changes	0	0
Plan assets at fair value, end of year	2,706	3,033	$ 3,369
Funded status of the plans, end of year	$ (22,251)	$ (25,893)