Pension And Other Postretirement Benefit Plans (Funded Status In Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Non-current liability (reported as pensions and other postretirement benefits)	$ (70,680)	$ (59,257)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset (included in other noncurrent assets)	346	1,837
Current liability (included in accounts payable and accrued expenses)	(2,978)	(1,490)
Non-current liability (reported as pensions and other postretirement benefits)	(46,000)	(33,567)
Amounts recognized in the consolidated balance sheets	(48,632)	(33,220)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset (included in other noncurrent assets)	0	0
Current liability (included in accounts payable and accrued expenses)	(2,233)	(2,228)
Non-current liability (reported as pensions and other postretirement benefits)	(24,680)	(25,690)
Amounts recognized in the consolidated balance sheets	$ (26,913)	$ (27,918)