Income Taxes (Schedule Of Significant Components Of The Provision For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Current:
Federal	$ 42,040	$ 25,230	$ 65,508
State	2,799	2,622	1,692
Foreign	33,022	41,333	37,861
Total current	77,861	69,185	105,061
Deferred:
Federal	(785)	11,329	(22,624)
State	(79)	1,103	(422)
Foreign	(52,620)	(35,191)	(10,906)
Total deferred	(53,484)	(22,759)	(33,952)
Provision for income taxes	$ 24,377	$ 46,426	$ 71,109