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
	Dec. 30, 2017	Dec. 24, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 637,142	$ 554,587
Comprehensive income	26,494	7,281
Amortization of share-based awards	2,143	2,118
Restricted share activity, including net share settlement	(2,397)	(3,313)
Issuance of common stock, including net share settlement of stock options	166	(4,031)
Tax benefit on stock option exercise, net of tax deficiency		4,332
Distribution to Noncontrolling interest	(1,597)	(1,018)
Ending balance	661,951	559,956
Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	635,686	553,014
Comprehensive income	26,291	7,129
Amortization of share-based awards	2,143	2,118
Restricted share activity, including net share settlement	(2,397)	(3,313)
Issuance of common stock, including net share settlement of stock options	166	(4,031)
Tax benefit on stock option exercise, net of tax deficiency		4,332
Ending balance	661,889	559,249
Additional Paid In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	396,790	393,297
Amortization of share-based awards	2,143	2,118
Restricted share activity, including net share settlement	(2,397)	(3,312)
Issuance of common stock, including net share settlement of stock options	166	(4,033)
Tax benefit on stock option exercise, net of tax deficiency		4,332
Ending balance	396,702	392,402
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	239,329	160,501
Comprehensive income	26,247	7,637
Ending balance	265,576	168,138
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(951)	(1,294)
Comprehensive income	44	(508)
Ending balance	(907)	(1,802)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,456	1,573
Comprehensive income	203	152
Distribution to Noncontrolling interest	(1,597)	(1,018)
Ending balance	62	707
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	122	120
Issuance of common stock, including net share settlement of stock options
Ending balance	122	120
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	380	374
Restricted share activity, including net share settlement		(1)
Issuance of common stock, including net share settlement of stock options		2
Ending balance	380	375
Class B Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	16	16
Ending balance	$ 16	$ 16