Debt (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended				6 Months Ended	12 Months Ended	0 Months Ended			0 Months Ended	6 Months Ended		6 Months Ended									0 Months Ended	3 Months Ended	6 Months Ended				0 Months Ended	6 Months Ended			6 Months Ended	12 Months Ended	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jan. 31, 2012	Jul. 31, 2012 Verint	Jul. 31, 2011 Verint	Jul. 31, 2012 Verint	Jul. 31, 2011 Verint	Oct. 31, 2011 Verint	Apr. 29, 2011 Verint Maximum	Jul. 31, 2012 Comverse Ltd.	Jan. 31, 2012 Comverse Ltd.	Apr. 30, 2011 Prior Facility Verint	Apr. 29, 2011 Prior Facility Verint	May 25, 2007 Prior Facility Verint	Apr. 30, 2011 New Credit Agreement Verint	Jul. 31, 2012 New Credit Agreement Verint	Apr. 29, 2011 New Credit Agreement Verint	Jul. 31, 2012 New Credit Agreement Verint Leverage Ratio Until July 31, 2013	Jul. 31, 2012 New Credit Agreement Verint Leverage Ratio Thereafter	Jul. 31, 2012 New Credit Agreement Verint Eurodollar Loans	Jul. 31, 2012 New Credit Agreement Verint Eurodollar Loans Corporate Ratings of less than BB- or Ba3	Jul. 31, 2012 New Credit Agreement Verint Eurodollar Loans Corporate Ratings of at least BB- or Ba3 or better	Jul. 31, 2012 New Credit Agreement Verint Base Rate Loans Corporate Ratings of less than BB- or Ba3	Jul. 31, 2012 New Credit Agreement Verint Base Rate Loans Corporate Ratings of at least BB- or Ba3 or better	Jul. 31, 2012 New Credit Agreement Verint Base Rate Loans Federal Funds Effective Rate	Jul. 31, 2012 New Credit Agreement Verint Base Rate Loans Adjusted LIBO Rate for One-Month Interest Period	Apr. 30, 2011 Term Loan Facility Verint	Jul. 31, 2012 Term Loan Facility Verint	Jul. 31, 2012 Term Loan Facility Verint	Jan. 31, 2012 Term Loan Facility Verint	Apr. 29, 2011 Term Loan Facility Verint	May 25, 2007 Term Loan Facility Verint	Apr. 30, 2011 Revolving Credit Facility Verint	Jul. 31, 2012 Revolving Credit Facility Verint	Jul. 31, 2010 Revolving Credit Facility Verint	May 25, 2007 Revolving Credit Facility Verint	Jul. 31, 2012 Comverse Ltd. Lines Of Credit Comverse Ltd.	Jan. 31, 2012 Comverse Ltd. Lines Of Credit Comverse Ltd.	Jul. 31, 2012 Convertible Debt Obligations
Debt [Line Items]
Aggregate principal amount of outstanding Convertible Debt	$ 2,195,000		$ 2,195,000		$ 2,195,000
Principal amount of the convertible debt obligations																																									1,000
Redemption price of convertible debt, percent of principal	100.00%		100.00%
Conversion price of convertible debt obligations																																									$ 17.9744
Conversion rate of convertible debt obligations																																									55.6347
Prior facility																675,000,000																		650,000,000			75,000,000	25,000,000
Line of credit facility term, years																															7 years					6 years
Secured senior credit facilities																			770,000,000
Amount available under the Term Loan Facility																																	600,000,000
Amount available under revolving credit facility																																	170,000,000
Credit facility maximum increase											300,000,000
Outstanding term loan borrowings repayment																														594,000,000	594,000,000		583,200,000
Loan facility discount rate																													0.50%	0.50%
Loan facility discount amount																													3,000,000
Proceeds received on issuance of term loan facility net of discount																													597,000,000
Interest rate basis spread																						1.25%	3.25%	3.00%	2.25%	2.00%
Variable rate base rate spread																											0.50%	1.00%
Debt issuance costs			159,000	15,034,000													14,800,000
Deferred costs associated with the credit facility																													10,200,000						4,600,000
Unamortized deferred costs															9,000,000
Loss on extinguishment of debt	0	0	0	8,136,000										8,100,000
Fees associated with lenders that provided commitments under both the new and the prior revolving credit facilitiesFees associated with lenders that provided commitments under both the new and the prior revolving credit facilities														900,000
Credit facility interest rate																														4.50%	4.50%	4.50%
Credit facility effective interest rate																														4.91%	4.91%
Interest expense on borrowings						6,900,000	6,900,000	13,500,000	14,400,000
Amortization of deferred debt issuance costs						700,000			1,400,000
Amortization of term loan discount						100,000	100,000	200,000
Percentage of commitment fee under revolving credit facility																																				0.50%
Credit facilities principal payments																		1,500,000
Credit facilities leverage ratio																				5	4.5
Development bank and government debt in the Americas region										3,300,000
Annual interest rate						7.00%		7.00%
Carrying value of the debt						2,400,000		2,400,000
Amount available line of credit for various performance guarantees												20,000,000	20,000,000
Credit facility, used for guarantees and foreign currency transactions												17,500,000	17,800,000																										7,000,000	3,300,000
Additional line of credit																																							$ 8,000,000	$ 8,000,000