Related Party Transactions (Details) (USD $)	0 Months Ended		9 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended	9 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended
	May 30, 2012 Verint nominee	Oct. 31, 2012 Verint	Oct. 31, 2012 Verint Verint's Series A Convertible Perpetual Preferred Stock	Jan. 31, 2012 Verint Verint's Series A Convertible Perpetual Preferred Stock	May 25, 2007 Verint Verint's Series A Convertible Perpetual Preferred Stock	May 30, 2012 CTI director	May 31, 2012 CTI	May 25, 2007 CTI Verint's Series A Convertible Perpetual Preferred Stock	Oct. 31, 2012 CTI Verint's Series A Convertible Perpetual Preferred Stock	Jan. 31, 2012 CTI Verint's Series A Convertible Perpetual Preferred Stock	Aug. 12, 2012 Verint Merger Agreement nominee director	Oct. 31, 2012 Verint Merger Agreement	Oct. 31, 2012 Verint Merger Agreement	Aug. 12, 2012 Verint Merger Agreement Common Stock	Aug. 12, 2012 Verint Merger Agreement Verint Verint's Series A Convertible Perpetual Preferred Stock	Aug. 12, 2012 Minimum Verint Merger Agreement nominee	Aug. 12, 2012 Maximum Verint Merger Agreement nominee
Related Party Transaction [Line Items]
Number of nominees designated by Cadian Capital	3										2
Number of CTI board directors who also serve on Verint Board						3
Reimbursements of documented expenses							$ 300,000
Payments for reimbursement of document expenses							263,000
Minimum required shares owned by outside party in settlement agreement (in shares)							1,000,000
Equity method investment, ownership percentage		40.60%
Estimated ownership percent upon conversion of all preferred stock												53.50%	53.50%
Conversion price per share (in dollars per share)					$ 32.66										$ 32.66
Consecutive trading days after conversion of preferred stock											20 days
Maximum additional value of shares upon conversion based on net worth														10,000,000
Value of share distribution											25,000,000
Contingent value of share distribution upon completion of merger											0
Minimum ownership percentage of outstanding shares (percent)											50.00%
Minimum liability for indemnification obligations											10,000,000
Potential termination fee											10,000,000
Transaction and related costs to acquisitions												10,400,000	14,200,000
Maximum cure period for breach of obligations											30 days
Period after termination for breach of obligations											18 months
Number of directors with Cadian Agreement											9
Number of directors without Cadian Agreement											7
Number of nominees designated by Cadian Capital											3
Number of nominees designated by CTI																1,000	0
Minimum ownership percentage of outstanding shares											50.00%					30.00%	50.00%
Ownership percentage of outstanding voting securities without Cadian Agreement																15.00%	30.00%
Minimum ownership percentage of outstanding voting securities by holders											9.00%
Minimum direct or indirect ownership by person or group after certain transactions											50.00%
Beneficial ownership percentage by CTI											50.00%					49.50%
Additional purchase price of Option Shares upon exercise of Put Option																	5,000,000
Ownership percentage resulting in termination											50.00%
Aggregate number of shares purchased for cash (in shares)								293,000
Aggregate purchase price of preferred stock								293,000,000
Preferred stock cumulative, undeclared dividends									69,400,000	59,000,000
Liquidation preference of the preferred stock									$ 362,400,000	$ 352,000,000
Initial conversion rate for each share of preferred stock to common stock (in shares)			30.6185
Preferred stock potentially convertible to common stock (in shares)			11,100,000	10,800,000