Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive loss
Cumulative effect adjustment for adoption of new accounting pronouncement	[1]					$ 7,815
Beginning of period (in shares) at Sep. 29, 2018			31,838,000
Exercise of stock options and vesting of other stock awards (in shares)			295,000
Treasury shares purchased (in shares)			(2,646,000)
End of period (in shares) at Jun. 29, 2019			29,487,000
Beginning of period at Sep. 29, 2018		$ 921,143	$ 526	$ 581,488	$ (711,138)	1,062,246	$ (11,979)
Exercise of stock options and vesting of other stock awards			3
Stock-based compensation expense				15,355
Exercise of stock options and vesting of other stock awards, including tax benefits				(4,527)
Treasury shares purchased					(150,704)
Net income		71,785				71,785
Other comprehensive (loss) income		(79)					(79)
End of period at Jun. 29, 2019		860,791	$ 529	592,316	(861,842)	1,141,846	(12,058)
Beginning of period (in shares) at Mar. 30, 2019			30,241,000
Exercise of stock options and vesting of other stock awards (in shares)			30,000
Treasury shares purchased (in shares)			(784,000)
End of period (in shares) at Jun. 29, 2019			29,487,000
Beginning of period at Mar. 30, 2019		875,444	$ 528	586,279	(817,435)	1,117,045	(10,973)
Exercise of stock options and vesting of other stock awards			1
Stock-based compensation expense				5,426
Exercise of stock options and vesting of other stock awards, including tax benefits				611
Treasury shares purchased					(44,407)
Net income		24,801				24,801
Other comprehensive (loss) income		(1,085)					(1,085)
End of period at Jun. 29, 2019		$ 860,791	$ 529	592,316	(861,842)	1,141,846	(12,058)
Cumulative effect adjustment for adoption of new accounting pronouncement	[1]					(1,077)
Beginning of period (in shares) at Sep. 28, 2019		29,004,000	29,004,000
Exercise of stock options and vesting of other stock awards (in shares)			526,000
Treasury shares purchased (in shares)			(316,000)
End of period (in shares) at Jul. 04, 2020		29,214,000	29,214,000
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 stock awards			5
Stock-based compensation expense				17,367
Exercise of stock options and vesting of other stock awards, including tax benefits				335
Treasury shares purchased					(19,484)
Net income		79,774				79,774
Other comprehensive (loss) income		2,325					2,325
End of period at Jul. 04, 2020		$ 944,821	$ 534	615,103	(912,731)	1,257,374	(15,459)
Beginning of period (in shares) at Apr. 04, 2020			29,186,000
Exercise of stock options and vesting of other stock awards (in shares)			28,000
Treasury shares purchased (in shares)			0
End of period (in shares) at Jul. 04, 2020		29,214,000	29,214,000
Beginning of period at Apr. 04, 2020		$ 892,558	$ 534	607,446	(912,731)	1,221,532	(24,223)
Exercise of stock options and vesting of other stock awards			0
Stock-based compensation expense				6,542
Exercise of stock options and vesting of other stock awards, including tax benefits				1,115
Treasury shares purchased					0
Net income		35,842				35,842
Other comprehensive (loss) income		8,764					8,764
End of period at Jul. 04, 2020		$ 944,821	$ 534	$ 615,103	$ (912,731)	$ 1,257,374	$ (15,459)

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