Note 17 Commitments and Contingencies (Narratives) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	3 Months Ended
	Sep. 30, 2013 N	Sep. 30, 2013 Bank of West Original Arrangement November 13 2009 [Member]	Sep. 30, 2013 Bank of West Extended Arrangement December 29 2010 [Member]	Sep. 30, 2013 Bank of West Extended Arrangement October 29 2013 [Member]	Sep. 30, 2013 Bank of West [Member]
Acquisition Deferred Payments [Abstract]
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Total	$ 30.0
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Each Installment	15.0
Business Acquisition, Cost of Acquired Entity, Deferred Payments, Number of Installment Payments	2
Business Acquisition, Cost of Acquired Entity, Due Date of First Installment Payment	Jun. 27, 2014
Business Acquisition, Cost of Acquired Entity, Due Date of Second Installment Payment	Dec. 31, 2014
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date		Nov. 13, 2009	Dec. 29, 2010	Oct. 29, 2013	Dec. 29, 2010
Line of Credit Facility, Expiration Date		Oct. 31, 2011	Oct. 31, 2013	Nov. 30, 2013	Nov. 30, 2013
Line of Credit Facility, Amount Outstanding					15.0
Line of Credit Facility, Maximum Borrowing Capacity		15.0	20.0	20.0	20.0
Available Credit Line for Letter of Credit					$ 3.0