Pension And Other Postretirement Benefit Plans (Additional Information On Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]
For Plans With A Projected Benefit Obligation In Excess Of Plan Assets:
Aggregate projected benefit obligation	$ 254,117	$ 290,142
Aggregate fair value of plan assets	204,995	195,642
For Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets:
Aggregate accumulated benefit obligation	243,496	272,148
Aggregate fair value of plan assets	195,627	195,642
Other Postretirement Benefits [Member]
For Plans With A Projected Benefit Obligation In Excess Of Plan Assets:
Aggregate projected benefit obligation	41,846	48,970
Aggregate fair value of plan assets	$ 2,535	$ 2,932