Consolidated Statements of Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Class A Common Stock [Member]	Class B Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance, Beginning balance at Sep. 25, 2010	$ 532,143	$ 163	$ 437	$ 16	$ 483,817	$ 45,319	$ 944	$ 530,696	$ 1,447
Shares, Issued, Beginning Balance at Sep. 25, 2010		16,258,704	43,696,426	1,652,262
Other comprehensive income (loss)	75	0	0	0	0	0	75	75	0
Stock-based compensation	5,545	0	0	0	5,545	0	0	5,545	0
Tax benefit/deficiency on exercise of stock options, net of tax benefit	(501)	0	0	0	(501)	0	0	(501)	0
Restricted share activity	(264)	(1)	4		(267)			(264)
Restricted share activity, shares		(5,867)	470,009	0
Issuance of common stock	1,574	0	4	0	1,570	0	0	1,574	0
Issuance of common stock, shares		14,401	421,183	0
Repurchase of common stock	(108,672)	(33)	(86)	0	(93,956)	(14,597)	0	(108,672)	0
Repurchase of common stock, shares		(3,317,645)	(8,646,258)	0
Distribution to noncontrolling interest	(1,500)								(1,500)
Net income (loss)	28,382	0	0	0	0	28,323	0	28,323	59
Balance, Ending balance at Sep. 24, 2011	456,782	129	359	16	396,208	59,045	1,019	456,776	6
Shares, Issued, Ending Balance at Sep. 24, 2011		12,949,593	35,941,360	1,652,262
Other comprehensive income (loss)	520	0	0	0	0	0	520	520	0
Stock-based compensation	5,449	0	0	0	5,449	0	0	5,449	0
Tax benefit/deficiency on exercise of stock options, net of tax benefit	56	0	0	0	56	0	0	56	0
Restricted share activity	370	0	1		369			370
Restricted share activity, shares		(9,722)	90,540
Issuance of common stock	477	0	6	0	471	0	0	477	0
Issuance of common stock, shares		0	579,702	0
Repurchase of common stock	(20,884)	(7)	(19)	0	(20,358)	(500)	0	(20,884)	0
Repurchase of common stock, shares		(692,300)	(1,904,700)	0
Net income (loss)	22,113	0	0	0	0	21,173	0	21,173	940
Balance, Ending balance at Sep. 29, 2012	464,883	122	347	16	382,195	79,718	1,539	463,937	946
Shares, Issued, Ending Balance at Sep. 29, 2012		12,247,571	34,706,902	1,652,262
Other comprehensive income (loss)	(97)	0	0	0	0	0	(97)	(97)	0
Stock-based compensation	4,210	0	0	0	4,210	0	0	4,210	0
Tax benefit/deficiency on exercise of stock options, net of tax benefit	(90)	0	0	0	(90)	0	0	(90)	0
Restricted share activity	2,464	0	4		2,460			2,464
Restricted share activity, shares		(820)	442,238
Issuance of common stock	1,686	0	3	0	1,683	0	0	1,686	0
Issuance of common stock, shares		0	307,761	0
Repurchase of common stock	(1,503)	0	(1)	0	(1,305)	(197)	0	(1,503)	0
Repurchase of common stock, shares		0	(165,900)	0
Distribution to noncontrolling interest	(629)								(629)
Net income (loss)	(900)	0	0	0	0	(1,929)	0	(1,929)	1,029
Balance, Ending balance at Sep. 28, 2013	$ 470,024	$ 122	$ 353	$ 16	$ 389,153	$ 77,592	$ 1,442	$ 468,678	$ 1,346
Shares, Issued, Ending Balance at Sep. 28, 2013		12,246,751	35,291,001	1,652,262