Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Jun. 01, 2015
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 204,114	$ 198,565
Capitalized intangible assets	29,200	10,400	$ 19,000
Amortization expense	$ 41,000	$ 49,500	$ 51,800
STG
Goodwill And Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 14,500