Nature Of Operations And Significant Accounting Policies (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Accounting Policies [Abstract]
Foreign currency translation adjustments, before income taxes	$ (18,031)	$ (12,331)	$ (819)
Foreign currency translation adjustments, allocated income taxes	2,476	481	(2,792)
Foreign currency hedge adjustments, before income taxes	(1,316)	(1,449)	3,819
Foreign currency hedge adjustments, allocated income taxes	461	507	(1,337)
Interest rate hedge adjustments, before income taxes	(1,679)	(1,119)
Interest rate hedge adjustments, allocated income taxes	588	392
Pension and other postretirement benefit plan adjustments, before income taxes	(89,285)	(102,833)	(66,851)
Pension and other postretirement benefit plan adjustments, allocated income taxes	31,246	35,991	23,204
Total accumulated other comprehensive loss, net of income taxes	$ (75,540)	$ (80,361)	$ (44,776)