Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2013

Accounting Policies [Abstract]

Schedule Of Finite Lived Intangible Asset Amortization Expense [Table Text Block]

Total purchased technology and other intangible asset amortization expenses were as follows:

Year ended January 31,	2013		2012		2011
Purchased technology and other intangible asset amortization expenses	$	13,716	$	15,701	$	21,118

Schedule of Intangible Assets and Goodwill [Table Text Block]

As of January 31, 2013, the carrying value of goodwill, intangible assets, and long-lived assets was as follows:

As of January 31,	2013		2012
Goodwill	$	535,932	$	527,102
Net purchased technology and in-process research and development(1)	$	8,019	$	14,023
Net other intangible assets(2)	$	13,819	$	14,546

Schedule of Goodwill [Table Text Block]

The following table summarizes goodwill activity:

Balance as of January 31, 2011	$	510,508
Acquisitions	16,107
Earnouts	642
Foreign exchange	(155		)
Balance as of January 31, 2012	$	527,102
Acquisitions	8,437
Earnouts	370
Foreign exchange	23
Balance as of January 31, 2013	$	535,932

Schedule of Expected Amortization Expense [Table Text Block]

We estimate the aggregate amortization expense related to purchased technology and other intangible assets will be as follows:

Fiscal years ending January 31,
2014	$	9,434
2015	7,233
2016	4,068
2017	859
2018	244
Thereafter	—
Aggregate amortization expense	$	21,838

Advertising Expense [Table Text Block]

Advertising expense is included in marketing and selling expense in the accompanying consolidated statement of income and was as follows:

Year ended January 31,	2013		2012		2011
Advertising expense	$	2,326	$	3,015	$	3,528

Sale Of Receivables [Table Text Block]

We sold the following receivables to financing institutions on a non-recourse basis and recognized the following gain on the sale of those receivables:

Year ended January 31,	2013			2012			2011
Trade receivables, short-term	$	9,617		$	13,645		$	27,011
Term receivables, long-term	11,094			16,662			26,554
Total receivables sold	20,711			30,307			53,565
Net proceeds	20,198			29,146			51,601
Discount on sold receivables	(513		)	(1,161		)	(1,964		)
Unaccreted interest on sold receivables	568			1,273			2,133
Gain on sale of receivables	$	55		$	112		$	169