Balance Sheet Details (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Sep. 28, 2013
Inventory, Net [Abstract]
Purchased parts and assemblies	$ 54,054		$ 50,275
Work-in-process	70,568		60,089
Finished goods	55,145		57,703
Total inventories	179,767		168,067
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid and refundable income taxes	27,090		23,939
Other Taxes Receivable	28,693		16,225
Prepaid expenses and other	11,861		12,413
Total prepaid expenses and other assets	67,644		52,577
Other Assets, Noncurrent Disclosure [Abstract]
Assets related to deferred compensation arrangements	25,731		23,446
Deferred tax assets	37,439		37,637
Other assets	5,816		5,457
Total other assets	68,986		66,540
Other Liabilities, Current [Abstract]
Accrued payroll and benefits	30,736		29,723
Deferred income	16,631		16,994
Reserve for warranty	17,875		18,508
Accrued expenses and other	9,735		11,552
Other taxes payable	27,666		6,147
Customer deposits	2,687		1,642
Total other current liabilities	105,330		84,566
Product Warranties Disclosures [Abstract]
Weighted average warranty period (months)		15 months
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	18,508	17,442
Additions related to current period sales	17,990	18,739
Warranty costs incurred in the current period	(18,320)	(19,681)
Accruals resulting from acquisition	0	1,728
Product Warranty Accrual, Currency Translation, Increase (Decrease)	(303)	(154)
Ending balance	17,875	18,074
Other Liabilities, Noncurrent [Abstract]
Long-term taxes payable	15,786		15,715
Deferred compensation	27,042		24,723
Deferred tax liabilities	10,565		10,487
Deferred income	3,896		2,734
Asset retirement obligations	2,276		2,247
Other long-term liabilities	6,335		6,226
Total other long-term liabilities	$ 65,900		$ 62,132