Related Party Transactions (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended							0 Months Ended	1 Months Ended		1 Months Ended				0 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010	Jul. 15, 2010 Verint System [Member]	May 25, 2007 Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 31, 2012 Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 31, 2011 Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 31, 2009 Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 31, 2010 Verint's Series A Convertible Perpetual Preferred Stock [Member]	May 31, 2007 Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 31, 2012 Verint's Series A Convertible Perpetual Preferred Stock [Member] Minimum [Member]	Jan. 31, 2012 Verint's Series A Convertible Perpetual Preferred Stock [Member] Maximum [Member]	Jan. 14, 2011 Verint's Series A Convertible Perpetual Preferred Stock [Member] Verint System [Member]	Apr. 30, 2009 Ulticom Shareholders [Member]	Apr. 21, 2009 Ulticom Shareholders [Member]	Dec. 31, 2010 Ulticom Minority Shareholders [Member]	Apr. 30, 2009 Ulticom Minority Shareholders [Member]	Apr. 30, 2009 Ulticom Holders of Deferred Stock Units [Member]	Jan. 31, 2008 Prior Facility [Member] Verint's Series A Convertible Perpetual Preferred Stock [Member]	Jan. 14, 2011 Parent Company [Member] Verint System [Member]	Jan. 31, 2012 Parent Company [Member] Verint System [Member]	Jan. 31, 2011 Parent Company [Member] Verint System [Member]	May 25, 2007 Parent Company [Member] Verint's Series A Convertible Perpetual Preferred Stock [Member]	Dec. 31, 2010 Parent Company [Member] Ulticom Shareholders [Member]	Apr. 30, 2009 Parent Company [Member] Ulticom Shareholders [Member]
Related Party Transaction [Line Items]
Aggregate number of shares purchased for cash																							293,000
Aggregate purchase price of preferred stock																							$ 293,000,000
Par value of purchased preferred stock					$ 1,000
Liquidation price per share of purchased preferred stock					$ 1,000
Liquidation preference of the preferred stock						352,000,000
Preferred stock redemption percentage						100.00%
Additional board of directors of subsidiary						2
Additional board of directors of subsidiary elected by parent						2
Reduction in board of directors of subsidiary						2
Conversion of preferred stock into common shares											0	3.7
Preferred stock dividend rate					4.25%			3.875%
Preferred stock dividend payment using volume weighted-average percentage of price of common stock						95.00%
Basis points spread for term loan																			0.50%
Consecutive trading days for common stock valuation	5 days
Preferred stock dividends declared or paid						$ 0
Preferred stock cumulative, undeclared dividends						59,000,000
Initial conversion rate for each share of preferred stock to common stock										30.6185
Initial convertible preferred stock conversion price						$ 32.66
Preferred stock potentially convertible to common stock						10,800,000	10,400,000
Preferred stock conversion price specified percentage						135.00%
Demands to require subsidiary to register preferred stock for resale						2
Right to demand registration statement						1
Shares of common stock in secondary public offerring													2,300,000							2,300,000
Shares of common stock in agreement to be registered in a registration statement				2,800,000
Aggregate proceeds net of underwriting discounts and commissions	(1,655,000)	36,641,000	(106,000)																	76,500,000
Adjustments to additional paid-in capital related to completion of offerring																						52,200,000
Adjustments to noncontrolling interest related to completion of offerring																						4,500,000
Adjustments to accumulated other comprehensive income related to completion of offerring		0																			2,600,000
Aggregate amount of special cash dividend														199,600,000		21,700,000	64,300,000							64,100,000	199,600,000
Dividends payable to shareholders							$ 0		$ 0									$ 200,000
Outstanding options to purchase shares of common stock															2,982,104
Special cash dividend per share														$ 4.58