Pension And Other Postretirement Benefit Plans (Funded Status In Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Non-current liability (reported as pensions and other postretirement benefits)	$ (59,257)	$ (64,843)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset (included in other noncurrent assets)	1,837	2,308
Current liability (included in accounts payable and accrued expenses)	(1,490)	(8,602)
Non-current liability (reported as pensions and other postretirement benefits)	(33,567)	(37,796)
Amounts recognized in the consolidated balance sheets	(33,220)	(44,090)
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)	(2,228)	(2,431)
Non-current liability (reported as pensions and other postretirement benefits)	(25,690)	(27,047)
Amounts recognized in the consolidated balance sheets	$ (27,918)	$ (29,478)