Restructuring (Roll Forward Of Workforce Reduction And Restructuring Activities Under Various Plans) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 5,814	$ 5,302
Charges	15,040	28,886
Change in assumptions	(152)	(110)
Translation adjustments	265
Paid or utilized	(15,828)	(13,506)
Ending Balance	5,139	20,572
Netcentrex 2010 Initiative [Member] | Severance Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2,910
Charges	7,117	10,098
Change in assumptions	(12)
Translation adjustments	265
Paid or utilized	(6,245)	29
Ending Balance	4,035	10,127
Netcentrex 2010 Initiative [Member] | Facilities Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Charges
Change in assumptions
Paid or utilized
Ending Balance
Comverse Third Quarter 2010 Initiative [Member] | Severance Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2,462
Charges	7,359	11,323
Change in assumptions	(140)
Paid or utilized	(8,602)	(2,532)
Ending Balance	1,079	8,791
Comverse Third Quarter 2010 Initiative [Member] | Facilities Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	86
Charges	179	191
Paid or utilized	(240)
Ending Balance	25	191
Comverse First Quarter 2010 Initiative [Member] | Severance Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	6
Charges	16	6,004
Change in assumptions	(3)
Paid or utilized	(19)	(5,897)
Ending Balance		107
Comverse First Quarter 2010 Initiative [Member] | Facilities Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	94
Charges	13	1,007
Paid or utilized	(107)	(804)
Ending Balance		203
Pre 2010 Initiatives [Member] | Severance Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	227	699
Charges	274	17
Change in assumptions	1	(110)
Paid or utilized	(502)	(366)
Ending Balance		240
Pre 2010 Initiatives [Member] | Facilities Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	29	4,487
Charges	82	246
Change in assumptions	2
Paid or utilized	(113)	(3,820)
Ending Balance		913
Verint Initiatives [Member] | Severance Related [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		116
Paid or utilized		$ (116)