Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 324,245	$ 320,361
Short-term investments in marketable securities	35,990	16,213
Short-term restricted cash	10,672	22,564
Receivables, net of allowances for doubtful accounts of $5,315 and $5,553	212,261	185,955
Inventories	193,297	182,010
Deferred tax assets	19,965	18,899
Other current assets	39,797	27,964
Total current assets	836,227	773,966
Non-current investments in marketable securities	24,059	53,341
Long-term restricted cash	24,876	43,669
Property, plant and equipment, net of accumulated depreciation of $108,872 and $106,760	97,367	85,082
Goodwill	79,743	58,053
Deferred tax assets	658	934
Non-current inventories	64,029	57,575
Other assets, net	25,389	17,289
Total Assets	1,152,348	1,089,909
Current liabilities:
Accounts payable	61,553	52,470
Accrued payroll liabilities	28,552	46,698
Accrued warranty reserves	11,479	11,683
Accrued agent commissions	13,938	9,005
Short-term deferred revenue	73,042	72,730
Income taxes payable	17,756	11,260
Accrued restructuring, reorganization, relocation and severance	0	2,213
Convertible debt	89,011	0
Other current liabilities	57,787	48,623
Total current liabilities	353,118	254,682
Long-term convertible debt	0	89,011
Long-term deferred revenue	23,533	23,423
Deferred tax liabilities	10,621	6,607
Other liabilities	14,489	19,372
Commitments and contingencies
Shareholders' Equity:
Preferred stock - 500 shares authorized; none issued and outstanding	0	0
Common stock - 70,000 shares authorized; 38,075 and 37,866 shares issued and outstanding, no par value	503,799	493,698
Retained earnings	231,575	178,661
Accumulated other comprehensive income	15,213	24,455
Total Shareholders' Equity	750,587	696,814
Total Liabilities and Shareholders' Equity	$ 1,152,348	$ 1,089,909