Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]		Total
Balance (in shares) at Sep. 28, 2013		18,185
Balance at Sep. 28, 2013		$ 18,185,000	$ 55,452,000	$ 88,981,000	$ (1,562,000)	[1]	$ 161,056,000
Net earnings				16,641,000			16,641,000
Other comprehensive loss(1)					(228,000)	[1]	$ (228,000)
Stock options exercised (in shares)		129					183
Stock options exercised		$ 129,000	1,000,000				$ 1,129,000
Vesting of restricted stock units (in shares)		63
Vesting of restricted stock units		$ 63,000	(63,000)
Compensation expense associated with stock-based plans			2,661,000				2,661,000
Excess tax benefits from stock-based compensation			575,000				575,000
Restricted stock units and stock options surrendered for withholding taxes payable			(758,000)				(758,000)
Cash dividends declared				(2,193,000)			(2,193,000)
Balance (in shares) at Sep. 27, 2014		18,377
Balance at Sep. 27, 2014		$ 18,377,000	58,867,000	103,429,000	(1,790,000)	[1]	178,883,000
Net earnings				21,710,000			21,710,000
Other comprehensive loss(1)	[1]				(356,000)		$ (356,000)
Stock options exercised (in shares)		24					27
Stock options exercised		$ 24,000	176,000				$ 200,000
Vesting of restricted stock units (in shares)		65
Vesting of restricted stock units		$ 65,000	(65,000)
Compensation expense associated with stock-based plans			2,298,000				2,298,000
Excess tax benefits from stock-based compensation			169,000				169,000
Restricted stock units and stock options surrendered for withholding taxes payable			(478,000)				(478,000)
Cash dividends declared				(2,211,000)			(2,211,000)
Balance (in shares) at Oct. 03, 2015		18,466
Balance at Oct. 03, 2015		$ 18,466,000	60,967,000	122,928,000	(2,146,000)	[1]	200,215,000
Net earnings							37,245,000
Other comprehensive loss(1)	[1]				605,000		$ 605,000
Stock options exercised (in shares)		463					651
Stock options exercised		$ 463,000	4,602,000				$ 5,065,000
Vesting of restricted stock units (in shares)		47
Vesting of restricted stock units		$ 47,000	(47,000)
Compensation expense associated with stock-based plans			2,439,000				2,439,000
Excess tax benefits from stock-based compensation			1,717,000				1,717,000
Restricted stock units and stock options surrendered for withholding taxes payable			(1,861,000)				(1,861,000)
Cash dividends declared				(20,859,000)			(20,859,000)
Balance (in shares) at Oct. 01, 2016		18,976
Balance at Oct. 01, 2016		$ 18,976,000	$ 67,817,000	$ 139,314,000	$ (1,541,000)	[1]	$ 224,566,000

[1] Activity within accumulated other comprehensive income (loss) is reported net of related income taxes: 2014 $140, 2015 $218 and 2016 $.