Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive loss
Cumulative effect adjustment for adoption of new accounting pronouncement (1)	[1]						$ (1,077)
Beginning of period (in shares) at Sep. 28, 2019			29,004,000
Exercise of stock options and vesting of other share-based awards			498,000
Treasury shares purchased (in shares)			(316,000)
End of period (in shares) at Apr. 04, 2020			29,186,000
Beginning of period at Sep. 28, 2019		$ 865,576	$ 529	$ 597,401	$ (893,247)	$ 1,178,677		$ (17,784)
Exercise of stock options and vesting of other share-based awards			5
Share-based compensation expense				10,825
Exercise of stock options and vesting of other share-based awards, including tax withholding				(780)
Treasury shares purchased					(19,484)
Net income		43,932				43,932
Other comprehensive (loss) income		(6,439)						(6,439)
End of period at Apr. 04, 2020		892,558	$ 534	607,446	(912,731)	1,221,532		(24,223)
Beginning of period (in shares) at Jan. 04, 2020			29,222,000
Exercise of stock options and vesting of other share-based awards			189,000
Treasury shares purchased (in shares)			(225,000)
End of period (in shares) at Apr. 04, 2020			29,186,000
Beginning of period at Jan. 04, 2020		908,372	$ 532	609,168	(899,577)	1,208,606		(10,357)
Exercise of stock options and vesting of other share-based awards			2
Share-based compensation expense				5,779
Exercise of stock options and vesting of other share-based awards, including tax withholding				(7,501)
Treasury shares purchased					(13,154)
Net income		12,926				12,926
Other comprehensive (loss) income		(13,866)						(13,866)
End of period at Apr. 04, 2020		$ 892,558	$ 534	607,446	(912,731)	1,221,532		(24,223)
Beginning of period (in shares) at Oct. 03, 2020		29,002,000	29,002,000
Exercise of stock options and vesting of other share-based awards			313,000
Treasury shares purchased (in shares)			(656,000)
End of period (in shares) at Apr. 03, 2021		28,659,000	28,659,000
Beginning of period at Oct. 03, 2020		$ 977,480	$ 535	621,564	(934,639)	1,295,079		(5,059)
Exercise of stock options and vesting of other share-based awards			3
Share-based compensation expense				11,822
Exercise of stock options and vesting of other share-based awards, including tax withholding				(6,210)
Treasury shares purchased					(51,900)
Net income		77,962				77,962
Other comprehensive (loss) income		4,795						4,795
End of period at Apr. 03, 2021		$ 1,013,952	$ 538	627,176	(986,539)	1,373,041		(264)
Beginning of period (in shares) at Jan. 02, 2021			28,766,000
Exercise of stock options and vesting of other share-based awards			242,000
Treasury shares purchased (in shares)			(349,000)
End of period (in shares) at Apr. 03, 2021		28,659,000	28,659,000
Beginning of period at Jan. 02, 2021		$ 1,006,959	$ 536	624,859	(957,410)	1,331,278		7,696
Exercise of stock options and vesting of other share-based awards			2
Share-based compensation expense				6,473
Exercise of stock options and vesting of other share-based awards, including tax withholding				(4,156)
Treasury shares purchased					(29,129)
Net income		41,763				41,763
Other comprehensive (loss) income		(7,960)						(7,960)
End of period at Apr. 03, 2021		$ 1,013,952	$ 538	$ 627,176	$ (986,539)	$ 1,373,041		$ (264)

[1] See Note 1, "Basis of Presentation," for a discussion of recently adopted accounting pronouncements.