Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive (loss) income
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)			24,000
Treasury shares purchased (in shares)			(870,000)
End of period (in shares) at Dec. 29, 2018			30,992,000
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			0
Stock-based compensation expense				4,753
Exercise of stock options and vesting of other stock awards, including tax benefits				770
Treasury shares purchased					(50,051)
Net income		22,226				22,226
Other comprehensive income (loss)		(1,493)					(1,493)
End of period at Dec. 29, 2018		$ 905,163	$ 526	587,011	(761,189)	1,092,287	(13,472)
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)			309,000
Treasury shares purchased (in shares)			(91,000)
End of period (in shares) at Jan. 04, 2020		29,222,000	29,222,000
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			3
Stock-based compensation expense				5,046
Exercise of stock options and vesting of other stock awards, including tax benefits				6,721
Treasury shares purchased					(6,330)
Net income		31,006				31,006
Other comprehensive income (loss)		7,427					7,427
End of period at Jan. 04, 2020		$ 908,372	$ 532	$ 609,168	$ (899,577)	$ 1,208,606	$ (10,357)

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