Benefit Plans Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 51	$ 47	$ 154	$ 142
Defined Benefit Plan, Interest Cost	609	654	1,828	1,963
Defined Benefit Plan, Expected Return on Plan Assets	(821)	(758)	(2,463)	(2,275)
Defined Benefit Plan, Amortization of Gains (Losses)	267	267	799	801
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	106	210	318	631
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	114	135	341	406
Defined Benefit Plan, Interest Cost	66	88	198	262
Defined Benefit Plan, Expected Return on Plan Assets	(67)	(95)	(201)	(285)
Defined Benefit Plan, Amortization of Gains (Losses)	0	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	113	128	338	383
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	248	292	743	876
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	106	97	319	291
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(816)	(816)	(2,447)	(2,447)
Defined Benefit Plan, Net Periodic Benefit Cost	$ (462)	$ (427)	$ (1,385)	$ (1,280)