Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Balance at Sep. 29, 2011	$ 322,320	$ 229	$ 212,551	$ (837)	$ 110,377
Balance, Shares at Sep. 29, 2011		22,924
Comprehensive income, net of tax:
Net income (loss)	(2,547)				(2,547)
Unrealized gains on qualifying cash flow hedges	178			178
Sock-based compensation expense	2,823		2,823
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		336
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Value		4
Stock Issued During Period, Value, Stock Options Exercised	4		0
Tax withholdings paid by the Company on behalf of employees in settlement of share-based awards	(290)		(290)
Tax effect from stock- based compensation, net	(371)		(371)
Income tax benefit of note hedge	2,434		2,434
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(110)
Balance at Sep. 27, 2012	324,551	233	217,147	(659)	107,830
Balance, Shares at Sep. 27, 2012		23,260
Comprehensive income, net of tax:
Net income (loss)	(3,012)				(3,012)
Unrealized gains on qualifying cash flow hedges	393			393
Sock-based compensation expense	2,738		2,738
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		296
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Value		3
Stock Issued During Period, Value, Stock Options Exercised	69		66
Tax withholdings paid by the Company on behalf of employees in settlement of share-based awards	(498)		(498)
Tax effect from stock- based compensation, net	(703)		(703)
Income tax benefit of note hedge	161		161
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	0
Balance at Sep. 26, 2013	323,699	236	218,911	(266)	104,818
Balance, Shares at Sep. 26, 2013		23,556
Comprehensive income, net of tax:
Net income (loss)	13,224				13,224
Unrealized gains on qualifying cash flow hedges	266			266
Sock-based compensation expense	3,322		3,322
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		(110)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Value		(2)
Stock Issued During Period, Value, Stock Options Exercised	273		275
Tax withholdings paid by the Company on behalf of employees in settlement of share-based awards	(819)		(819)
Tax effect from stock- based compensation, net	(508)		(508)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	0
Balance at Sep. 25, 2014	$ 339,457	$ 234	$ 221,181	$ 0	$ 118,042
Balance, Shares at Sep. 25, 2014		23,446