Supplemental Equity Information - Summary of Changes in Carrying Amounts of Equity Attributable to Controlling Interest and Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 26, 2016	Mar. 28, 2015	Mar. 26, 2016	Mar. 28, 2015
Class of Stock [Line Items]
Beginning balance			$ 506,380	$ 486,453
Comprehensive loss	$ 32,976	$ 23,354	24,120	17,119
Amortization of share-based awards			2,986	2,771
Restricted share activity			(578)	(640)
Issuance of common stock			(552)	732
Repurchase of common stock				(15,123)
Tax benefit on stock option exercise, net of tax deficiency			1,177	351
Distribution to Noncontrolling interest			(592)	(1,680)
Other			1
Ending balance	532,942	489,983	532,942	489,983
Additional Paid In Capital
Class of Stock [Line Items]
Beginning balance			388,636	396,586
Amortization of share-based awards			2,986	2,771
Restricted share activity			(580)	(638)
Issuance of common stock			(554)	730
Repurchase of common stock				(12,726)
Tax benefit on stock option exercise, net of tax deficiency			1,177	351
Ending balance	391,665	387,074	391,665	387,074
Retained Earnings
Class of Stock [Line Items]
Beginning balance			115,987	86,396
Comprehensive loss			24,095	17,540
Repurchase of common stock				(2,380)
Ending balance	140,082	101,556	140,082	101,556
Accumulated Other Comprehensive Income
Class of Stock [Line Items]
Beginning balance			164	1,232
Comprehensive loss			(692)	(1,168)
Ending balance	(528)	64	(528)	64
Total
Class of Stock [Line Items]
Beginning balance			505,286	484,723
Comprehensive loss			23,403	16,372
Amortization of share-based awards			2,986	2,771
Restricted share activity			(578)	(640)
Issuance of common stock			(552)	732
Repurchase of common stock				(15,123)
Tax benefit on stock option exercise, net of tax deficiency			1,177	351
Ending balance	531,722	489,186	531,722	489,186
Noncontrolling Interest
Class of Stock [Line Items]
Beginning balance			1,094	1,730
Comprehensive loss			717	747
Distribution to Noncontrolling interest			(592)	(1,680)
Other			1
Ending balance	1,220	797	1,220	797
Common Stock
Class of Stock [Line Items]
Beginning balance			119	124
Repurchase of common stock				(5)
Ending balance	119	119	119	119
Class A Common Stock
Class of Stock [Line Items]
Beginning balance			364	369
Restricted share activity			2	(2)
Issuance of common stock			2	2
Repurchase of common stock				(12)
Ending balance	368	357	368	357
Class B Stock
Class of Stock [Line Items]
Beginning balance			16	16
Ending balance	$ 16	$ 16	$ 16	$ 16