Stock-Based Compensation (Tables)

9 Months Ended

Oct. 31, 2011

Stock-Based Compensation [Abstract]

Schedule Of Stock-Based Compensation Expense

	Three Months Ended October 31,				Nine Months Ended October 31,
	2011		2010		2011		2010
	(In thousands)
Stock options:
Product costs	$	6	$	271	$	133	$	698
Service costs		41		742		268		2,265
Selling, general and administrative		376		4,743		2,443		12,960
Research and development		51		1,241		434		3,904
		474		6,997		3,278		19,827
Restricted/Deferred stock awards:
Product costs		242		234		564		694
Service costs		582		550		1,817		1,864
Selling, general and administrative		6,689		7,389		20,286		22,647
Research and development		673		664		2,136		2,555
		8,186		8,837		24,803		27,760
Total	$	8,660	$	15,834	$	28,081	$	47,587

Schedule Of Fair Values Of The Options With The Weighted-Average Assumptions Using A Black-Scholes Option Pricing Model

	As of August 4, 2011
Expected life (in years)		5.43
Risk-free interest rate		1.26	%
Expected volatility		50.40	%
Dividend yield		0	%