Benefit Plans Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 40	$ 37	$ 120	$ 112
Defined Benefit Plan, Interest Cost	450	523	1,349	1,569
Defined Benefit Plan, Expected Return on Plan Assets	(861)	(834)	(2,582)	(2,503)
Defined Benefit Plan, Amortization of Gains (Losses)	365	333	1,094	1,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	(6)	59	(19)	178
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0	0	0
Defined Benefit Plan, Interest Cost	171	217	512	650
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	223	181	668	544
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(816)	(816)	(2,447)	(2,447)
Defined Benefit Plan, Net Periodic Benefit Cost	$ (422)	$ (418)	$ (1,267)	$ (1,253)