Consolidated Statements Of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Sep. 29, 2012	$ 3,910	$ 652	$ 211,256	$ 10,901	$ 226,719
Balance, Shares at Sep. 29, 2012	15,640
Total comprehensive income			57,806	1,436	59,242
Exercise of stock options	$ 61	7,833			$ 7,894
Exercise of stock options, Shares	243				243
Stock-based compensation	$ 10	3,653			$ 3,663
Stock-based compensation, Shares	40
Tax benefit from equity compensation		1,835			1,835
Issuance for employee stock purchase plan	$ 5	746			751
Issuance for employee stock purchase plan, Shares	20
Common stock purchased and retired	$ (134)	(14,719)	(9,914)		(24,767)
Common stock purchased and retired, Shares	(535)
Dividends			(18,800)		(18,800)
Balance at Sep. 28, 2013	$ 3,852		240,348	12,337	256,537
Balance, Shares at Sep. 28, 2013	15,408
Total comprehensive income			42,009	(6,513)	35,496
Exercise of stock options	$ 46	6,680			$ 6,726
Exercise of stock options, Shares	182				182
Stock-based compensation	$ 7	6,045			$ 6,052
Stock-based compensation, Shares	31
Tax benefit from equity compensation		1,727			1,727
Issuance for employee stock purchase plan	$ 4	860			864
Issuance for employee stock purchase plan, Shares	16
Common stock purchased and retired	$ (114)	(9,200)	(21,699)		(31,013)
Common stock purchased and retired, Shares	(457)
Dividends			(18,262)		(18,262)
Balance at Sep. 27, 2014	$ 3,795	6,112	242,396	5,824	258,127
Balance, Shares at Sep. 27, 2014	15,180
Total comprehensive income			45,462	(11,401)	34,061
Exercise of stock options	$ 23	3,904			$ 3,927
Exercise of stock options, Shares	92				92
Stock-based compensation	$ 14	7,443			$ 7,457
Stock-based compensation, Shares	57
Tax benefit from equity compensation		734			734
Issuance for employee stock purchase plan	$ 4	916			920
Issuance for employee stock purchase plan, Shares	16
Common stock purchased and retired	$ (103)	(14,834)	(14,178)		(29,115)
Common stock purchased and retired, Shares	(413)
Dividends			(17,969)		(17,969)
Balance at Oct. 03, 2015	$ 3,733	$ 4,275	$ 255,711	$ (5,577)	$ 258,142
Balance, Shares at Oct. 03, 2015	14,932