Stock-Based Compensation (Narrative) (Details) (USD $)	6 Months Ended		3 Months Ended	0 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended			6 Months Ended				3 Months Ended	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012 CTI	May 25, 2007 Verint	Jul. 31, 2012 Verint	Jul. 31, 2011 Verint	Jul. 31, 2012 Verint	Jul. 31, 2011 Verint	Aug. 04, 2011 Verint	Jul. 31, 2012 Restricted Stock Awards CTI	Jul. 31, 2011 Restricted Stock Awards CTI	Jul. 31, 2012 Restricted Stock Awards CTI Y	Jul. 31, 2011 Restricted Stock Awards CTI	Jul. 31, 2012 Restricted Stock Awards Verint Y	Jul. 31, 2011 Restricted Stock Awards Verint	Jul. 31, 2011 Phantom Stock Units (RSUs) Verint	Jul. 31, 2012 Phantom Stock Units (RSUs) Verint	Jul. 31, 2011 Phantom Stock Units (RSUs) Verint	Jan. 31, 2012 Phantom Stock Units (RSUs) Verint	Jul. 31, 2012 DSU Awards CTI	Jul. 31, 2012 DSU Awards CTI	Jul. 31, 2012 Stock Options CTI Y	Apr. 30, 2012 Stock Options CTI	Jul. 31, 2011 Stock Options CTI	Jul. 31, 2012 Stock Options CTI Y	Jul. 31, 2011 Stock Options CTI	Jul. 31, 2012 Restricted Stock Awards Verint	Jul. 31, 2011 Restricted Stock Awards Verint	Jul. 31, 2012 Stock Bonus Program Verint	Jan. 31, 2012 Stock Bonus Program Verint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Filing period for periodic reports (in months)			12 months
Number of deferred stock units granted (in shares)										269,184		3,606,454								340,397	1,325,116	1,088,644	0
Shares issued upon exercise of stock options (in shares)																						1,125			4,502
Value of shares issued upon exercise of stock options	$ 24,000	$ 0
Outstanding stock options (in shares)									42,000	4,555,251		4,555,251		1,900,000	1,500,000							3,677,771			3,677,771		1,900,000	1,500,000
Shares available for future grants (in shares)			17,269,072
Total fair value of vested restricted awards										1,900,000	500,000	6,500,000	8,800,000
Unrecognized compensation expense for nonvested awards										26,100,000		26,100,000		39,600,000								2,100,000			2,100,000
Weighted-average period of remaining nonvested awards (in years)												2.23		2.3											2.85		2.3
Shares of common stock available to purchase related to unvested stock options (in shares)																						1,088,644			1,088,644
Weighted-average grant date fair value of unvested stock options (per share)																						$ 2.02			$ 2.02
Expected term of unvested stock options (in years)																						4
Fair value of unvested stock options																						2,200,000			2,200,000
Fair value of stock options vested during period																						300,000		400,000	300,000	400,000
Converted into stock options to purchase of common stock (in shares)				3,100,000
Shares of common stock issued pursuant to stock option exercises (in shares)					22,000	174,000	59,000	432,000
Total proceeds received upon exercise of stock options					300,000	3,500,000	1,000,000	8,700,000
Stock options exercisable					1,000,000		1,000,000
Options outstanding but not exercisable					22,000		22,000
Granted in period (shares)														1,200,000	900,000												0	0
Other than options outstanding (in shares)														0													0
Weighted-average grant date fair value (per share)														$ 30.72	$ 30.24
Total cash payments upon vesting of phantom stock units																3,400,000	2,300,000	10,300,000
Accrued liabilities for stock bonus program																	200,000		1,900,000
Authorized shares under plan (in shares)																														150,000
Discount when awards are calculated (percent)																														20.00%
Total accrued liability for stock compensation plan																														3,200,000
Shares of common stock earned during period (in shares)																														132,000
Cash payments to settle awards																													$ 100,000