Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Other comprehensive income (loss)
Balance at the beginning of the year at Sep. 30, 2017	$ 428,777	$ 4,440	$ 163,632	$ 261,258	$ (553)
Balance at the beginning of the year ( in shares) at Sep. 30, 2017		17,760
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	37,157			33,151	4,006
Cumulative effect of accounting change	0		(33)	33	0
Exercise of stock options	212	$ 1	211
Exercise of stock options (in shares)		4
Stock-based compensation	1,515	$ 7	1,508
Stock-based compensation (in shares)		30
Common stock purchased and retired	(744)	$ (3)	(741)
Common stock purchased and retired (in shares)		(14)
Dividends	(5,337)			(5,337)
Balance at the end of the year at Dec. 30, 2017	461,580	$ 4,445	164,577	289,105	3,453
Balance at the end of the year (in shares) at Dec. 30, 2017		17,780
Balance at the beginning of the year at Sep. 29, 2018	477,932	$ 4,464	171,407	300,585	1,476
Balance at the beginning of the year ( in shares) at Sep. 29, 2018		17,856
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	5,334			10,501	(5,167)
Cumulative effect of accounting change	(6,227)		0	(6,227)	0
Exercise of stock options	38	$ 0	38
Exercise of stock options (in shares)		0
Stock-based compensation	1,980	$ 6	1,974
Stock-based compensation (in shares)		23
Common stock purchased and retired	(356)	$ (2)	(354)
Common stock purchased and retired (in shares)		(7)
Dividends	(5,366)			(5,366)
Balance at the end of the year at Dec. 29, 2018	$ 473,335	$ 4,468	$ 173,065	$ 299,493	$ (3,691)
Balance at the end of the year (in shares) at Dec. 29, 2018		17,872