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. 29, 2012		17,717
Balance at Sep. 29, 2012		$ 17,717,000	$ 50,379,000	$ 83,845,000	$ (2,441,000)		$ 149,500,000
Net earnings				11,735,000	0		11,735,000
Other comprehensive income(1)					879,000	[1]	$ 879,000
Stock options exercised (in shares)		371					373
Stock options exercised		$ 371,000	3,054,000				$ 3,425,000
Vesting of restricted stock units (in shares)		97
Vesting of restricted stock units		$ 97,000	(97,000)
Compensation expense associated with stock-based plans			2,161,000				2,161,000
Excess tax benefits from stock-based compensation			660,000				660,000
Restricted stock units and stock options surrendered for withholding taxes payable			(705,000)				(705,000)
Cash dividends declared				(6,599,000)			(6,599,000)
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)		161,056,000
Restricted stock units and stock options surrendered for withholding taxes payable			(705,000)				(705,000)
Cash dividends declared				(6,599,000)			(6,599,000)
Net earnings				16,641,000			16,641,000
Other comprehensive income(1)	[1]				(228,000)		$ (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)		178,883,000
Restricted stock units and stock options surrendered for withholding taxes payable			(758,000)				(758,000)
Cash dividends declared				(2,193,000)			(2,193,000)
Net earnings							21,710,000
Other comprehensive income(1)	[1]				(356,000)		$ (3,556,000)
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)		200,215,000
Restricted stock units and stock options surrendered for withholding taxes payable			$ (478,000)				(478,000)
Cash dividends declared				$ (2,211,000)			$ (2,211,000)

[1] Activity within accumulated other comprehensive income (loss) is reported net of related income taxes: 2013 ($539), 2014 $140 and 2015 $218.