Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense) (Details) (USD $)	12 Months Ended
	Jan. 31, 2012		Jan. 31, 2011		Jan. 31, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 37,033,000		$ 57,398,000		$ 57,665,000
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	3,934,000		22,414,000		24,404,000
Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	33,099,000		34,984,000		33,261,000
Product Costs [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	138,000		796,000		928,000
Product Costs [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	760,000		850,000		759,000
Service Costs [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	342,000		2,499,000		3,591,000
Service Costs [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	2,601,000		2,350,000		1,510,000
Selling, General And Administrative [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	2,915,000		14,709,000		14,306,000
Selling, General And Administrative [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	26,820,000		28,555,000		27,358,000
Research And Development [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	539,000		4,410,000		5,579,000
Research And Development [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	2,918,000		3,229,000		3,634,000
CTI [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	302,000	[1]	16,000	[1]	2,610,000	[1]
CTI [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	8,444,000	[1]	9,402,000	[1]	9,344,000	[1]
Verint [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	3,256,000	[2]	21,237,000	[2]	20,320,000	[2]
Verint [Member] | Restricted/Deferred Stock Awards [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	24,655,000	[2]	25,582,000	[2]	23,917,000	[2]
Starhome [Member] | Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 376,000		$ 1,161,000		$ 1,474,000

[1] Stock options to purchase CTI’s common stock, deferred stock unit awards and restricted stock unit awards were awarded to employees and directors of CTI’s subsidiaries, including employees of Verint and Starhome. Accordingly, the related stock-based compensation expense has been recognized in the respective subsidiary statements of operations.

[2] Verint’s stock-based compensation expense consists of stock options to purchase Verint common stock, Verint phantom stock units, Verint stock bonus program and Verint restricted stock awards and restricted stock units.