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Shareholders' Equity (Changes in Shareholders' Equity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 Class A Common Stock [Member] | Jun. 28, 2014 Class B Common Stock [Member] | Jun. 28, 2014 Common Stock [Member] | Sep. 28, 2013 Common Stock [Member] | Jun. 28, 2014 Additional Paid-In Capital [Member] | Jun. 28, 2014 Retained Earnings [Member] | Jun. 28, 2014 Treasury Stock [Member] | Jun. 28, 2014 Stock Employee Compensation Trust (Sect) [Member] | Jun. 28, 2014 Accumulated Other Comprehensive (Loss) Income [Member]
Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of Period |  |  | $ 1,535,765 |  |  |  | $ 51,280 | $ 51,280 | $ 447,478 | $ 1,289,713 | $ (83,003) | $ (35,545) | $ (134,158)
Equity-based compensation expense |  |  |  |  |  |  |  |  | 6,545 |  |  |  |
Issuance of treasury shares at more than cost |  |  |  |  |  |  |  |  | 550 |  |  |  |
Adjustment To Marker Sect And Other |  |  |  |  |  |  |  |  | 12,057 |  |  |  |
Net earnings | 48,122 | 34,227 | 117,944 | 104,872 |  |  |  |  |  | 117,944 |  |  |
Issuance of treasury shares |  |  |  |  |  |  |  |  |  |  | 1,862 |  |
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  | (149,530) |  |
Issuance of stock held by Stock Employee Compensation Trust |  |  |  |  |  |  |  |  |  |  |  | 1,144 |
Purchase of stock held by Stock Employee Compensation Trust |  |  |  |  |  |  |  |  |  |  |  | (5,206) |
Adjustment to market - SECT |  |  |  |  |  |  |  |  |  |  |  | (9,363) |
Other Comprehensive Income (Loss), Net of Tax | 9,496 | 2,417 | 18,607 | (4,484) |  |  |  |  |  |  |  |  | 18,607
End of Period | $ 1,530,375 |  | $ 1,530,375 |  |  |  | $ 51,280 | $ 51,280 | $ 466,630 | $ 1,407,657 | $ (230,671) | $ (48,970) | $ (115,551)
Common Stock, Beginning of Period |  |  |  |  | 43,613,060 | 7,666,653 |  |  |  |  |  |  |
Conversion of Class B to Class A, Shares |  |  |  |  | 11,371 | (11,371) |  |  |  |  |  |  |
Common Stock, End of Period |  |  |  |  | 43,624,431 | 7,655,282 |  |  |  |  |  |  |
Treasury Stock, Beginning of Period |  |  |  |  | (2,004,262) | (3,305,971) |  |  |  |  |  |  |
Issuance of treasury shares, Shares |  |  |  |  | 274,159 | 0 |  |  |  |  |  |  |
Purchase of treasury shares, Shares |  |  |  |  | (2,217,579) | (10,686) |  |  |  |  |  |  |
Treasury Stock, End of Period |  |  |  |  | (3,947,682) | (3,316,657) |  |  |  |  |  |  |
SECT, Beginning of Period |  |  |  |  |  | (610,223) |  |  |  |  |  |  |
Issuances of stock held by Stock Employee Compensation Trust, Shares |  |  |  |  |  | 18,444 |  |  |  |  |  |  |
Purchase of stock held by Stock Employee Compensation Trust, Shares |  |  |  |  |  | (80,153) |  |  |  |  |  |  |
SECT, End of Period |  |  |  |  |  | (671,932) |  |  |  |  |  |  |
TOTAL SHAREHOLDERS' EQUITY, Shares |  |  |  |  | 39,676,749 | 3,666,693 |  |  |  |  |  |  |

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