Goodwill (Changes In Carrying Amount Of Goodwill) (Details) (USD $)			9 Months Ended						3 Months Ended	12 Months Ended
	Oct. 31, 2012	Jan. 31, 2012	Oct. 31, 2012 Verint		Oct. 31, 2012 Verint		Jan. 31, 2012 Verint		Apr. 30, 2012 Other Acquisitions Verint	Jan. 31, 2012 Other Acquisitions Verint
Goodwill [Roll Forward]
Goodwill, gross, at beginning of period			$ 896,968,000	[1]			$ 894,155,000	[1]
Accumulated impairment losses			0	[1]	0	[1]
Effect of changes in foreign currencies and other			2,813,000	[1]
Goodwill, net	896,968,000	894,155,000	896,968,000	[1]			894,155,000	[1]
Reduction in goodwill due to identified adjustments									$ 2,900,000	$ 100,000

[1] Goodwill balances as of January 31, 2012 have been retrospectively adjusted to reflect measurement period adjustments to the purchase price allocations for several business combinations completed during the fiscal year ended January 31, 2012. These adjustments were identified during the three months ended April 30, 2012, and resulted from new information obtained about facts and circumstances that existed as of the respective acquisition dates. These adjustments reduced goodwill by $2.9 million in the Verint segment (see Note 5, Business Combinations).