Balance Sheet Details (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011 months	Jan. 01, 2011	Oct. 01, 2011	Oct. 02, 2010
Inventory, Net [Abstract]
Purchased parts and assemblies	$ 41,844		$ 44,824
Work-in-process	54,582		52,457
Finished goods	51,621		55,104
Total inventories	148,047		152,385
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid and refundable income taxes	9,517		9,193
Prepaid expenses and other	42,797		35,771
Total prepaid expenses and other assets	52,314		44,964
Other Assets, Noncurrent Disclosure [Abstract]
Assets related to deferred compensation arrangements (see Note 14)	23,133		22,737
Deferred tax assets	36,136		37,156
Other assets	4,381		4,289
Total other assets	63,650		64,182
Other Liabilities, Current [Abstract]
Accrued payroll and benefits	26,703		39,639
Deferred income	15,318		14,893
Reserve for warranty	16,035		16,704
Accrued expenses and other	13,590		12,473
Other taxes payable	18,343		11,067
Accrued restructuring charges	615	1,801	634	2,232
Customer deposits	3,969		3,210
Total other current liabilities	94,573		98,620
Product Warranties Disclosures [Abstract]
Weighted average warranty period (months)	15
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Reserve for warranty costs, beginning balance	16,704	13,499
Additions related to current period sales	6,374	5,876
Warranty costs incurred in the current period	(7,249)	(5,297)
Adjustment to accruals related to prior period sales	206	(178)
Reserve for warranty costs, ending balance	16,035	13,900
Other Liabilities, Noncurrent [Abstract]
Long-term taxes payable	28,195		27,775
Deferred compensation	23,274		22,685
Deferred tax liabilities	1,953		2,194
Deferred income	2,483		2,636
Asset retirement obligations	1,888		1,878
Other long-term liabilities	5,772		5,673
Total other long-term liabilities	$ 63,565		$ 62,841