Related Party Transactions (Details) (Verint's Series A Convertible Perpetual Preferred Stock [Member], USD $)	3 Months Ended	12 Months Ended	0 Months Ended
	Apr. 30, 2012	Jan. 31, 2012	May 25, 2007 CTI [Member]
Related Party Transaction [Line Items]
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	62,400,000	59,000,000
Liquidation preference of the preferred stock	$ 355,400,000	$ 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)	10,900,000	10,800,000