Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Income (loss) before income taxes:
United States	$ 60,547	$ 141,035	$ 126,912
Foreign	(48,015)	19,761	13,580
Total income before income taxes	12,532	160,796	140,492
Current:
Federal	11,155	46,058	30,246
State	2,705	6,949	5,948
Foreign	11,646	8,569	9,596
Total current income tax expense	25,506	61,576	45,790
Deferred:
Federal	(2,965)	(200)	6,755
State	(637)	(622)	1,069
Foreign	(7,866)	(4,690)	(6,104)
Total deferred income tax expense (benefit)	(11,468)	(5,512)	1,720
Total income tax expense	14,038	56,064	47,510
Reconciliation of income tax expense
Tax at federal statutory rate	4,386	56,278	49,172
State taxes, net of federal benefit	1,316	4,932	4,376
R&E credits	(6,622)	(360)	(1,689)
Domestic production deduction	(828)	(774)	(770)
Tax differential on foreign earnings	(4,263)	(4,444)	(4,140)
Corrections of prior-year errors	3,255
Goodwill and contingent consideration	11,288	(1,552)
Stock compensation	443	80	301
Valuation allowance	4,947	2,512
Other	116	(608)	260
Total income tax expense	$ 14,038	$ 56,064	$ 47,510
Reconciliation of effective income tax rate
Tax at federal statutory rate (as a percent)	35.00%	35.00%	35.00%
State taxes, net of federal benefit (as a percent)	10.50%	3.10%	3.10%
R&E credits (as a percent)	(52.80%)	(0.20%)	(1.20%)
Domestic production deduction (as a percent)	(6.60%)	(0.50%)	(0.60%)
Tax differential on foreign earnings (as a percent)	(34.00%)	(2.80%)	(3.00%)
Corrections of prior-year errors (as a percent)	26.00%
Goodwill and contingent consideration (as a percent)	90.00%	(1.00%)
Stock compensation (as a percent)	3.50%	0.10%	0.20%
Valuation allowance (as a percent)	39.50%	1.60%
Other (as a percent)	0.90%	(0.40%)	0.30%
Total income tax expense (as a percent)	112.00%	34.90%	33.80%