Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 317,666	$ 384,170
Short-term investments in marketable securities	120,832	108,191
Short-term restricted cash	14,926	18,798
Receivables, net of allowances for doubtful accounts of $3,070 and $2,969	206,906	194,418
Inventories	192,551	181,725
Deferred tax assets	9,884	15,114
Other current assets	30,089	28,324
Total current assets	892,854	930,740
Non-current investments in marketable securities	60,740	47,278
Long-term restricted cash	34,589	32,718
Property, plant and equipment, net of accumulated depreciation of $130,790 and $125,405	163,447	157,829
Intangible assets, net of accumulated amortization of $19,479 and $16,941	67,637	47,197
Goodwill	184,260	136,152
Deferred tax assets	4,261	1,751
Non-current inventories	59,295	62,104
Other assets, net	10,517	10,315
Total Assets	1,477,600	1,426,084
Current Liabilities:
Accounts payable	94,311	73,247
Accrued payroll liabilities	34,538	45,146
Accrued warranty reserves	13,264	12,705
Short-term deferred revenue	93,098	91,563
Income taxes payable	3,135	4,579
Other current liabilities	52,105	46,374
Total current liabilities	290,451	273,614
Long-term deferred revenue	32,603	30,744
Deferred tax liabilities	11,465	8,931
Other liabilities	36,580	35,227
Commitments and contingencies
Shareholders’ Equity:
Preferred stock - 500 shares authorized; none issued and outstanding	0	0
Common stock - 70,000 shares authorized; 42,255 and 42,136 shares issued and outstanding, no par value	646,531	637,482
Retained earnings	412,938	392,958
Accumulated other comprehensive income	47,032	47,128
Total Shareholders’ Equity	1,106,501	1,077,568
Total Liabilities and Shareholders’ Equity	$ 1,477,600	$ 1,426,084