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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 | 9 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 24, 2017 | Jun. 30, 2018 | Jun. 24, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 637,142 | $ 554,587
Comprehensive income | $ 41,057 | $ 33,061 | 113,551 | 75,734
Amortization of share-based awards |  |  | 6,865 | 6,377
Restricted share activity, including net share settlement |  |  | (7,135) | (7,492)
Issuance of common stock, including net share settlement of stock options |  |  | (4,105) | (16,350)
Tax benefit on stock option exercise, net of tax deficiency |  |  |  | 17,170
Distribution to Noncontrolling interest |  |  | (1,597) | (1,019)
Ending balance | 744,721 | 629,007 | 744,721 | 629,007
Total |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 635,686 | 553,014
Comprehensive income |  |  | 112,824 | 74,376
Amortization of share-based awards |  |  | 6,865 | 6,377
Restricted share activity, including net share settlement |  |  | (7,135) | (7,492)
Issuance of common stock, including net share settlement of stock options |  |  | (4,105) | (16,350)
Tax benefit on stock option exercise, net of tax deficiency |  |  |  | 17,170
Ending balance | 744,135 | 627,095 | 744,135 | 627,095
Additional Paid In Capital |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 396,790 | 393,297
Amortization of share-based awards |  |  | 6,865 | 6,377
Restricted share activity, including net share settlement |  |  | (7,135) | (7,491)
Issuance of common stock, including net share settlement of stock options |  |  | (4,108) | (16,358)
Tax benefit on stock option exercise, net of tax deficiency |  |  |  | 17,170
Ending balance | 392,412 | 392,995 | 392,412 | 392,995
Retained Earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 239,329 | 160,501
Comprehensive income |  |  | 113,026 | 74,569
Ending balance | 352,355 | 235,070 | 352,355 | 235,070
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | (951) | (1,294)
Comprehensive income |  |  | (202) | (193)
Ending balance | (1,153) | (1,487) | (1,153) | (1,487)
Noncontrolling Interest |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 1,456 | 1,573
Comprehensive income |  |  | 727 | 1,358
Distribution to Noncontrolling interest |  |  | (1,597) | (1,019)
Ending balance | 586 | 1,912 | 586 | 1,912
Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 122 | 120
Restricted share activity, including net share settlement |  |  | (1) |
Issuance of common stock, including net share settlement of stock options |  |  |  | 2
Ending balance | 121 | 122 | 121 | 122
Class A Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 380 | 374
Restricted share activity, including net share settlement |  |  | 1 | (1)
Issuance of common stock, including net share settlement of stock options |  |  | 3 | 6
Ending balance | 384 | 379 | 384 | 379
Class B Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 16 | 16
Ending balance | $ 16 | $ 16 | $ 16 | $ 16

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