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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Net income	$ 59,518	$ 50,679	$ 154,766	$ 145,996
Foreign currency translation	2,515	(1,405)	3,336	1,299
Change in unrealized gains/ (losses) on marketable securities, net of tax	44	(991)	1,320	907
Comprehensive income	$ 62,077	$ 48,283	$ 159,422	$ 148,202

X

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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