Note 11 Employee Equity Incentive Plans (Share-based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2012		Dec. 31, 2011		Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Selling, General and Administrative Expenses	$ 726		$ 1,131		$ 2,857		$ 2,713
Stock-based Compensation Effect on Income Before Taxes	726		1,131		2,857		2,713
Provision for Income Taxes	254	[1]	339	[1]	1,000	[1]	814	[1]
Net Stock-based Compensation Effects on Net Income	$ 472		$ 792		$ 1,857		$ 1,899
Estimated Statutory Income Tax Rate									35.00%	30.00%

[1] Estimated at a statutory income tax rate of 35% in fiscal year 2013 and 30% in fiscal year 2012.