Quarterly report pursuant to Section 13 or 15(d)

Supplemental Equity Information - Summary of Changes in Carrying Amounts of Equity Attributable to Controlling Interest and Noncontrolling Interest (Details)

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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