Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Retained Earnings
Balance at the beginning of the year (in shares) at Sep. 29, 2018		17,856
Balance at the beginning of the year at Sep. 29, 2018	$ 477,932	$ 4,464	$ 171,407	$ 300,585	$ 1,476	$ (6,227)	$ (6,227)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	31,361			38,246	(6,885)
Conversion of tangible equity units (in shares)		781
Conversion of tangible equity units	0	$ 195	(195)
Exercise of stock options (in shares)		23
Exercise of stock options	1,140	$ 6	1,134
Stock-based compensation (in shares)		88
Stock-based compensation	7,515	$ 22	7,493
Issuance for employee stock purchase plan (in shares)		16
Issuance for employee stock purchase plan	557	$ 4	553
Common stock purchased and retired (in shares)		(28)
Common stock purchased and retired	(1,384)	$ (7)	(1,377)
Dividends	(16,355)			(16,355)
Balance at the end of the year (in shares) at Jun. 29, 2019		18,736
Balance at the end of the year at Jun. 29, 2019	494,539	$ 4,684	179,015	316,249	(5,409)
Balance at the beginning of the year (in shares) at Mar. 30, 2019		17,900
Balance at the beginning of the year at Mar. 30, 2019	485,054	$ 4,475	176,918	308,279	(4,618)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	12,794			13,585	(791)
Conversion of tangible equity units (in shares)		781
Conversion of tangible equity units	0	$ 195	(195)
Exercise of stock options (in shares)		20
Exercise of stock options	996	$ 5	991
Stock-based compensation (in shares)		55
Stock-based compensation	2,296	$ 14	2,282
Common stock purchased and retired (in shares)		(20)
Common stock purchased and retired	(986)	$ (5)	(981)
Dividends	(5,615)			(5,615)
Balance at the end of the year (in shares) at Jun. 29, 2019		18,736
Balance at the end of the year at Jun. 29, 2019	494,539	$ 4,684	179,015	316,249	(5,409)
Balance at the beginning of the year (in shares) at Sep. 28, 2019		19,124
Balance at the beginning of the year at Sep. 28, 2019	484,059	$ 4,781	182,422	315,329	(18,473)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	11,576			8,624	2,952
Exercise of stock options (in shares)		1
Exercise of stock options	41		41
Stock-based compensation (in shares)		117
Stock-based compensation	5,276	$ 29	5,247
Issuance for employee stock purchase plan (in shares)		15
Issuance for employee stock purchase plan	589	$ 4	585
Common stock purchased and retired (in shares)		(37)
Common stock purchased and retired	(1,176)	$ (9)	(1,167)
Dividends	(11,509)			(11,509)
Balance at the end of the year (in shares) at Jun. 27, 2020		19,220
Balance at the end of the year at Jun. 27, 2020	488,856	$ 4,805	187,128	312,444	(15,521)
Balance at the beginning of the year (in shares) at Mar. 28, 2020		19,188
Balance at the beginning of the year at Mar. 28, 2020	481,678	$ 4,797	187,551	308,055	(18,725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	7,593			4,389	3,204
Stock-based compensation (in shares)		50
Stock-based compensation	(111)	$ 12	(123)
Issuance for employee stock purchase plan	(1)		(1)
Common stock purchased and retired (in shares)		(18)
Common stock purchased and retired	(303)	$ (4)	(299)
Balance at the end of the year (in shares) at Jun. 27, 2020		19,220
Balance at the end of the year at Jun. 27, 2020	$ 488,856	$ 4,805	$ 187,128	$ 312,444	$ (15,521)