Note 10 Pension Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	$ 25	$ 21	$ 49	$ 42
Interest Cost on Projected Benefit Obligation	468	515	939	1,037
Expected Return on Plan Assets	(379)	(432)	(758)	(869)
Recognized Actuarial Loss	42	19	84	38
Net Periodic Pension Expense	$ 156	$ 123	$ 314	$ 248