Stockholders' Equity - Stock Options (Details) (USD $)	12 Months Ended						1 Months Ended
	Mar. 31, 2014 Approved_Plan		Mar. 31, 2013		Mar. 31, 2012		May 31, 2009 Chief Executive Officer	May 31, 2009 First Milestone - From Fiscal 2010 To 2013	May 31, 2009 Second Milestone - From Fiscal 2010 To 2013	May 31, 2009 Second Milestone - Fiscal 2014	May 31, 2009 Third Milestone - Fiscal 2013	May 31, 2009 Third Milestone - Fiscal 2010 To 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of annual operating margin required for vesting of shares under milestone											13.50%	15.00%
Annual target revenue								$ 270,000,000	$ 310,000,000	$ 350,000,000
Value of stock options awarded							1,100,000
Number of stockholder-approved plans	3
Number of plans unapproved by stockholders	4
Schedule of Option Activity Under Stock Incentive Plans
Number of Shares, Outstanding at the beginning of the year	3,492,000		4,164,000		5,390,000
Number of Shares, Granted	40,000		40,000		250,000		300,000
Number of Shares, Exercised	(662,000)		(161,000)		(156,000)
Number of Shares, Forfeited	(461,000)		(551,000)		(1,320,000)
Number of Shares, Outstanding at the end of the period	2,409,000		3,492,000		4,164,000
Number of Shares, Vested at the end of the period	2,409,000							75,000	75,000		150,000
Schedule of Weighted Average Exercise Price Per Share Under Stock Incentive Plans
Weighted Average Exercise Price Per Share, Outstanding at the beginning of the year (USD per share)	$ 10.26		$ 10.67		$ 11.91
Weighted Average Exercise Price Per Share, Granted (USD per share)	$ 7.35		$ 5.58		$ 10.10
Weighted Average Exercise Price Per Share, Exercised (USD per share)	$ 9.36		$ 5.31		$ 5.11
Weighted Average Exercise Price Per Share, Forfeited (USD per share)	$ 12.35		$ 14.49		$ 16.20
Weighted Average Exercise Price Per Share, Outstanding at the end of the period (USD per share)	$ 10.06		$ 10.26		$ 10.67
Weighted Average Exercise Price Per Share, Vested at the end of the period (USD per share)	$ 10.06
Weighted Average Remaining Contractual Life, Outstanding at Period End (in years)	2 years 8 months 12 days
Weighted Average Remaining Contractual Life, Vested and Exercisable at Period End (in years)	2 years 7 months 12 days
Aggregate Intrinsic Value, Exercises in Period	1,800,000	[1]	300,000	[1]	500,000	[1]
Aggregate Intrinsic Value, Outstanding at Period End	3.4	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	2,312,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 10.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	2 years 8 months 12 days
Aggregate Intrinsic Value, Vested and Exercisable at Period End	3.4	[2]
Common stock closing price per share	$ 9.90
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 3.2	[2]

[1] The aggregate pre-tax intrinsic value is calculated as the difference between the market value on the date of exercise and the exercise price of the shares.

[2] The aggregate pre-tax intrinsic value is calculated as the difference between the market value as of the end of the fiscal period and the exercise price of the shares. The closing price of the Company’s common stock was $9.90 on March 31, 2014.