Income Taxes (Schedule Of Significant Components Of The Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Current:
Federal	$ (9,564)	$ 131,107	$ 37,724
State	5,846	6,515	4,030
Foreign	48,905	49,082	30,914
Total current	45,187	186,704	72,668
Deferred:
Federal	(3,272)	(1,129)	(8,380)
State	64	363	(799)
Foreign	(9,274)	(3,495)	(1,823)
Total deferred	(12,482)	(4,261)	(11,002)
Provision for income taxes	$ 32,705	$ 182,443	$ 61,666