Leases (Details) (USD $)	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense, Gross	$ 39,700,000	$ 44,700,000	$ 49,500,000
Operating Leases, Rent Expense, Sublease Rentals	2,700,000	4,600,000	4,400,000
Minimum Lease Commitments [Abstract]
Operating Leases, Future Minimum Payments Due, Current	34,476,000
Operating Leases, Future Minimum Payments, Due in Two Years	24,883,000
Operating Leases, Future Minimum Payments, Due in Three Years	20,123,000
Operating Leases, Future Minimum Payments, Due in Four Years	14,704,000
Operating Leases, Future Minimum Payments, Due in Five Years	9,870,000
Operating Leases, Future Minimum Payments, Due Thereafter	36,803,000
Operating Leases, Future Minimum Payments Due	140,859,000
Operating Leases, Income Statement, Future Sublease Revenue	(8,724,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	132,135,000
2013 [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(2,687,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	31,789,000
2014 [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(2,387,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	22,496,000
2015 [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(2,363,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	17,760,000
2016 [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(688,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	14,016,000
2017 [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(553,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	9,317,000
2018 and Thereafter [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Income Statement, Future Sublease Revenue	(46,000)
Operating Lease, Future Minimum Payments Due, Net of Sublease	36,757,000
Building [Member] | Verint [Member]
Minimum Lease Commitments [Abstract]
Operating Leases, Future Minimum Payments Due	$ 36,100,000