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Pension And Other Postretirement Benefit Plans (Funded Status In Consolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Non-current liability (reported as pensions and other postretirement benefits) $ (64,843) $ (80,689)
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Non-current asset (included in other noncurrent assets) 2,308 1,710
Current liability (included in accounts payable and accrued expenses) (8,599) (1,106)
Non-current liability (reported as pensions and other postretirement benefits) (37,796) (49,703)
Amounts recognized in the consolidated balance sheets (44,087) (49,099)
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) (2,431) (2,746)
Non-current liability (reported as pensions and other postretirement benefits) (27,047) (30,986)
Amounts recognized in the consolidated balance sheets $ (29,478) $ (33,732)