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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Net income	$ 237,314	$ 185,251	$ 272,958
Foreign currency translation	1,455	(2,285)	(429)
Change in unrealized gains / (losses) on marketable securities, net of tax	1,275	1,035	(739)
Comprehensive income	$ 240,044	$ 184,001	$ 271,790

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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