Note 11 Stock-Based Compensation (Tables)

3 Months Ended

Dec. 30, 2017

Share-based Compensation [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Three Months Ended
	December 30, 2017		December 31, 2016
	(In thousands)
Stock options	$	1,177	$	550
Restricted stock units, including performance based awards	7,465		11,427
Total	$	8,642	$	11,977

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended
	December 30, 2017		December 31, 2016
	(In thousands)
Cost of sales	$	2,448	$	2,864
Selling, general and administrative	6,164		8,840
Research and development	30		273
Total	$	8,642	$	11,977

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Shares		Weighted- Average Exercise Price ($)	Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value of In-The-Money Options ($)
	(In thousands)				(In thousands)
Outstanding as of September 30, 2017	3,568		11.83	3.82	90,327
Granted	200		38.45
Exercised/Cancelled/Forfeited/Expired	(234	)	12.43
Outstanding as of December 30, 2017	3,534		13.30	4.06	62,548
Vested and expected to vest as of December 30, 2017	3,530		13.29	4.06	62,519
Exercisable as of December 30, 2017	3,314		11.93	3.74	62,097

Schedule of Restricted Stock Units Award Activity [Table Text Block]

	Number of Shares		Weighted- Average Grant Date Fair Value ($)	Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value ($)
	(In thousands)				(In thousands)
Outstanding as of September 30, 2017	3,359		27.56	1.51	124,800
Granted	694		35.86
Vested/Forfeited/Cancelled	(699	)	25.76
Outstanding as of December 30, 2017	3,354		29.65	1.69	102,465
Expected to vest as of December 30, 2017	2,521		28.83	1.65	77,002