Note 11 Employee Equity Incentive Plans (Option Outstanding) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2012		Mar. 31, 2012
Options Exercised Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Exercised	$ 155	[1]
Share-based Compensation Arrangement by Share-based Payment Award Options Outstanding Weighted Average Exercise Price Per Share [Abstract]
Options Outstanding	$ 9.87		$ 9.75
Options Granted	$ 9.85
Options Exercised	$ 6.77
Options Cancelled	$ 7.29
Options Expired	$ 5.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of Shares, Exercisable	4,076,385		3,833,879
Weighted Average Exercise Price Per Share, Exercisable	$ 9.74		$ 9.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance at March 31, 2012	5,472,004
Options Granted	205,000
Options Exercised	(39,469)
Options Cancelled	(39,925)
Options Expired	(98,975)
Balance at September 30, 2012	5,498,635

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