Income Taxes (Details) (USD $)	3 Months Ended			9 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Reconciliation of income tax expense
Tax at federal statutory rate				$ (9,009,000)	$ 39,800,000
State taxes, net of federal benefit				210,000	3,848,000
R&E credits				(2,243,000)	(253,000)
Domestic production deduction				(889,000)	(543,000)
Tax differential on foreign earnings				(1,790,000)	(3,240,000)
Valuation allowance				3,832,000
Goodwill				12,139,000
Other				(1,142,000)	(90,000)
Total income tax expense	(23,779,000)		15,674,000	1,108,000	39,522,000
Reconciliation of effective income tax rate
Tax at federal statutory rate (as a percent)				35.00%	35.00%
State taxes, net of federal benefit (as a percent)				(0.80%)	3.40%
R&E credits (as a percent)				8.70%	(0.20%)
Domestic production deduction (as a percent)				3.50%	(0.50%)
Tax differential on foreign earnings (as a percent)				7.00%	(2.80%)
Valuation allowance (as a percent)				(14.90%)
Goodwill (as a percent)				(47.20%)
Other (as a percent)				4.40%	(0.10%)
Total income tax expense (as a percent)				(4.30%)	34.80%
Goodwill impairment charge, not deductible for tax purposes	35,000,000
Effective tax rate excluding the impact of goodwill (as a percent)	33.70%			31.20%
Undistributed earnings of foreign subsidiaries	22,000,000			22,000,000
Provision for U.S. income taxes or foreign withholding taxes	0			0
Tax benefit from research and experimentation credits, as a result of the retroactive extension		$ 1,100,000