Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Weighted-average shares outstanding for basic and diluted net income per share

	Fiscal Year Ended March 31,
	2013		2012		2011
Net income	$	42,724	$	75,657	$	61,606
Basic net income per share:
Weighted-average shares outstanding — Basic	59,392		58,729		57,894
Basic net income per common share	$	0.72	$	1.29	$	1.06
Net income	$	42,724	$	75,657	$	61,606
Diluted net income per share:
Weighted-average shares outstanding — Basic	59,392		58,729		57,894
Effect of potentially dilutive securities	70		320		342
Weighted-average shares outstanding — Diluted	59,462		59,049		58,236
Diluted net income per common share	$	0.72	$	1.28	$	1.06

Stock-based compensation expense

	Fiscal Year Ended March 31,
	2013			2012			2011
Costs and expenses:
Cost of revenue	$	201		$	261		$	272
Research and development costs	230			184			152
Selling, general and administrative	1,896			2,876			3,324
Total share-based compensation	2,327			3,321			3,748
Amounts capitalized in software development costs	—			—			(2		)
Amounts charged against earnings, before income tax benefit	$	2,327		$	3,321		$	3,746
Income tax benefit	(726		)	(1,236		)	(1,343		)
Decrease in net income	$	1,601		$	2,085		$	2,403