Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 92,446	$ 90,983
Short-term investments	85,355	70,854
Accounts receivable, net	102,748	109,886
Inventories	68,007	70,649
Deferred income taxes	29,897	28,032
Prepaid expenses and other current assets	24,050	21,474
Total current assets	402,503	391,878
Property and equipment, net	39,568	40,469
Goodwill	212,440	212,417
Intangibles, net	72,874	87,651
Other assets	2,352	1,751
Total assets	729,737	734,166
Current liabilities:
Accounts payable	29,857	30,537
Income taxes payable	527	2,290
Deferred revenue	37,140	33,095
Accrued liabilities	40,254	46,896
Total current liabilities	107,778	112,818
Income taxes payable, long-term	46,492	47,307
Deferred income taxes, long-term	3,850	655
Other non-current liabilities	10,576	9,070
Total liabilities	168,696	169,850
Commitments and contingencies (Note 13)
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; 116,203 and 116,257 shares issued and outstanding at June 29, 2012 and December 31, 2011, respectively	116	116
Capital in excess of par value	2,437,447	2,433,164
Accumulated deficit	(1,875,600)	(1,868,089)
Accumulated other comprehensive loss	(922)	(875)
Total stockholders' equity	561,041	564,316
Total liabilities and stockholders' equity	$ 729,737	$ 734,166