Goodwill And Intangible Assets (Schedule Of Estimated Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
2014	$ 48,700
2015	39,300
2016	34,700
2017	29,900
2018	21,100
Capitalized software and development costs
Finite-Lived Intangible Assets [Line Items]
2014	19,800
2015	14,300
2016	10,700
2017	7,800
2018	5,200
Acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
2014	28,900
2015	25,000
2016	24,000
2017	22,100
2018	$ 15,900