Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended												3 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012 CTI [Member]	Apr. 30, 2012 Verint [Member]	Apr. 30, 2011 Verint [Member]	Apr. 30, 2012 Restricted Stock Awards [Member] CTI [Member] Y	Apr. 30, 2011 Restricted Stock Awards [Member] CTI [Member]	Apr. 30, 2012 Restricted Stock Awards [Member] Verint [Member] Y	Apr. 30, 2011 Restricted Stock Awards [Member] Verint [Member]	Apr. 30, 2011 Phantom Stock Units (RSUs) [Member] Verint [Member]	Apr. 30, 2012 Phantom Stock Units (RSUs) [Member] Verint [Member]	Jan. 31, 2012 Phantom Stock Units (RSUs) [Member] Verint [Member]	Apr. 30, 2011 DSU Awards [Member] CTI [Member]	Apr. 30, 2012 Stock Options [Member] CTI [Member] Y	Apr. 30, 2011 Stock Options [Member] CTI [Member]	Apr. 30, 2012 Stock Bonus Program [Member] Verint [Member]	Jan. 31, 2012 Stock Bonus Program [Member] Verint [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Filing period for periodic reports (in months)			12 months
Number of deferred stock units granted (in shares)						3,337,270		1,100,000	900,000				984,719
Shares issued upon exercise of stock options (in shares)														3,377
Value of shares issued upon exercise of stock options	$ 18,000	$ 0
Outstanding stock options (in shares)				42,000		4,649,297		2,400,000	1,800,000					2,695,883
Shares available for future grants (in shares)			18,572,600
Total fair value of vested restricted awards						4,500,000	8,300,000
Unrecognized compensation expense for nonvested awards						28,200,000		44,600,000
Weighted-average period of remaining nonvested awards (in years)						2.6		2.1
Shares of common stock available to purchase related to unvested stock options (in shares)														133,134
Weighted-average grant date fair value of unvested stock options (per share)														$ 2.34
Expected term of unvested stock options (in years)														4
Fair value of unvested stock options														300,000
Fair value of stock options vested during period														0	0
Converted into stock options to purchase of common stock (in shares)				3,100,000
Shares of common stock issued pursuant to stock option exercises (in shares)				37,000	258,000
Total proceeds received upon exercise of stock options				700,000	5,200,000
Stock options exercisable				1,000,000
Options outstanding but not exercisable				27,000
Weighted-average grant date fair value (per share)								$ 30.44	$ 29.17
Total cash payments upon vesting of phantom stock units										7,000,000
Accrued liabilities for stock bonus program											$ 2,300,000	$ 1,900,000				$ 3,500,000	$ 3,200,000
Authorized shares under plan (in shares)	150,000
Discount when awards are calculated (percent)	20.00%