Related Party Transactions (Details) (USD $)	1 Months Ended	0 Months Ended	6 Months Ended	12 Months Ended		6 Months Ended	12 Months Ended
	May 31, 2012 CTI director	May 25, 2007 CTI Verint's Series A Convertible Perpetual Preferred Stock	Jul. 31, 2012 CTI Verint's Series A Convertible Perpetual Preferred Stock	Jan. 31, 2012 CTI Verint's Series A Convertible Perpetual Preferred Stock	May 30, 2012 Verint nominee	Jul. 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
Related Party Transaction [Line Items]
Number of nominees designated by Cadian Capital					3
Number of CTI board directors who also serve on Verint Board	3
Reimbursements of documented expenses	$ 300,000
Minimum required shares owned by outside party in settlement agreement (in shares)	1,000,000
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			65,900,000	59,000,000
Liquidation preference of the preferred stock			$ 358,900,000	$ 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)						11,000,000	10,800,000
Conversion price per share (in dollars per share)								$ 32.66