Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2012

Balance Sheet Related Disclosures [Abstract]

Schedule Of Available-For-Sale Short-Term

Short-Term Investments

	As of
	September 30, 2012									December 31, 2011
	Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value		Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
U.S. Treasuries	$	225,019	$	17	$	(1	)	$	225,035	$	144,673	$	34	$	(4	)	$	144,703
Certificates of Deposits	2,784		—		—			2,784		94		—		—			94
Total	$	227,803	$	17	$	(1	)	$	227,819	$	144,767	$	34	$	(4	)	$	144,797

Schedule Of Accounts Receivable And Related Allowances

Accounts receivable, net

	As of
	September 30, 2012			December 31, 2011
Gross accounts receivable	$	268,819		$	279,932
Allowance for doubtful accounts	(1,256		)	(1,335		)
Allowance for sales returns	(15,465		)	(13,360		)
Allowance for price protection	(3,236		)	(3,930		)
Total allowances	(19,957		)	(18,625		)
Total accounts receivable, net	$	248,862		$	261,307

Schedule Of Inventories

Inventories

	As of
	September 30, 2012		December 31, 2011
Raw materials	$	4,352	$	4,676
Finished goods	174,564		159,048
Total inventories	$	178,916	$	163,724

Schedule Of Property And Equipment, Net

Property and equipment, net

	As of
	September 30, 2012			December 31, 2011
Computer equipment	$	7,154		$	7,109
Furniture, fixtures and leasehold improvements	12,415			9,757
Software	21,326			19,974
Machinery and equipment	28,533			21,797
Construction in progress	952			662
Total property and equipment, gross	70,380			59,299
Accumulated depreciation and amortization	(51,453		)	(43,415		)
Total property and equipment, net	$	18,927		$	15,884

Schedule Of Intangibles, Net

Intangibles, net

The following tables present details of the Company’s purchased intangible assets:

	Gross		Accumulated Amortization			Net
September 30, 2012
Technology	$	32,059	$	(21,340	)	$	10,719
Customer contracts and relationships	16,000		(2,795		)	13,205
Other	5,470		(2,893		)	2,577
Finite-lived intangibles, net	53,529		(27,028		)	26,501
Indefinite-lived intangible assets	1,200		—			1,200
Total purchased intangible assets, net	54,729		(27,028		)	27,701

	Gross		Accumulated Amortization			Net
December 31, 2011
Technology	$	24,800	$	(19,905	)	$	4,895
Customer contracts and relationships	15,700		(1,308		)	14,392
Other	4,070		(2,401		)	1,669
Total purchased intangible assets, net	$	44,570	$	(23,614	)	$	20,956

Schedule Of Estimated Amortization Expense Related To Intangibles

Estimated amortization expense related to intangibles for each of the next five years and thereafter is as follows:

Year Ending December 31	Amount
2012 (remaining three months)	$	1,437
2013	5,458
2014	5,133
2015	4,517
2016	4,158
Thereafter	5,798
Total expected amortization expense	$	26,501

Schedule Of Activity Related To Goodwill

Goodwill

The changes in the carrying amount of goodwill during the nine months ended September 30, 2012 are as follows:

	Retail		Commercial		Service Provider		Total
Goodwill at December 31, 2011	$	33,546	$	32,043	$	20,355	$	85,944
Goodwill acquired during the period	11,895		3,041		—		14,936
Goodwill at September 30, 2012	$	45,441	$	35,084	$	20,355	$	100,880

Schedule Of Other Accrued Liabilities

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Other accrued liabilities

	As of
	September 30, 2012		December 31, 2011
Sales and marketing programs	$	39,973	$	44,394
Warranty obligation	44,393		44,846
Freight	5,733		7,940
Other	30,730		23,300
Total other accrued liabilities	$	120,829	$	120,480