Note 12 Employee Equity Incentive Plans (Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2013		Mar. 31, 2013
Options Outstanding Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Exercised	$ 836	[1]
Share-based Compensation Arrangement by Share-based Payment Award Options Weighted Average Exercise Price Per Share [Abstract]
Options Outstanding	$ 10.10		$ 10.04
Options Granted	$ 9.27
Options Exercised	$ 7.69
Options Cancelled	$ 10.77
Options Expired	$ 12.13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of Shares, Exercisable	4,114,423		4,065,473
Weighted Average Exercise Price Per Share, Exercisable	$ 9.93		$ 9.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares Outstanding, Beginning Balance	5,327,473
Options Granted	239,000
Options Exercised	(226,050)
Options Cancelled	(19,000)
Options Expired	(2,500)
Number of Shares Outstanding, Ending Balance	5,318,923

[1] Represents the difference between the exercise price and the value of our common stock at the time of exercise.