CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 29, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 118,464	$ 96,670
Short-term investments	109,790	104,506
Accounts receivable, net	95,692	85,920
Inventories	46,385	64,270
Deferred income taxes	20,145	21,870
Prepaid expenses and other current assets	28,977	23,636
Total current assets	419,453	396,872
Property and equipment, net	37,201	38,122
Goodwill	197,820	212,518
Intangibles, net	51,414	58,447
Other assets	9,256	11,572
Total assets	715,144	717,531
Current liabilities:
Accounts payable	22,815	25,447
Income taxes payable		1,797
Deferred revenue	31,575	33,235
Accrued liabilities	42,294	42,415
Total current liabilities	96,684	102,894
Income taxes payable, long-term	50,669	49,309
Other non-current liabilities	11,732	11,915
Total liabilities	159,085	164,118
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value, 150,000 shares authorized; 114,336 and 114,193 shares issued and outstanding at March 29, 2013 and December 31, 2012, respectively	114	114
Additional paid-in capital	2,429,631	2,432,790
Accumulated deficit	(1,872,605)	(1,879,026)
Accumulated other comprehensive loss	(1,081)	(465)
Total stockholders' equity	556,059	553,413
Total liabilities and stockholders' equity	$ 715,144	$ 717,531