Unaudited Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 279,098	$ 149,032
Short-term investments	143,314	227,845
Accounts receivable, net	237,896	256,014
Inventories	158,555	174,903
Deferred income taxes	24,052	22,691
Prepaid expenses and other current assets	34,773	33,724
Total current assets	877,688	864,209
Property and equipment, net	18,387	19,025
Intangibles, net	26,079	27,621
Goodwill	100,880	100,880
Other non-current assets	22,282	22,834
Total assets	1,045,316	1,034,569
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	82,410	87,310
Accrued employee compensation	14,103	18,338
Other accrued liabilities	119,587	126,255
Deferred revenue	26,998	27,645
Income taxes payable	4,667	1,382
Total current liabilities	247,765	260,930
Non-current income taxes payable	13,187	13,735
Other non-current liabilities	6,987	5,293
Total liabilities	267,939	279,958
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock	39	38
Additional paid-in capital	402,050	394,427
Cumulative other comprehensive income	139	4
Retained earnings	375,149	360,142
Total stockholders’ equity	777,377	754,611
Total liabilities and stockholders’ equity	$ 1,045,316	$ 1,034,569