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Shareholders' Equity (Changes in Shareholders' Equity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 29, 2014 | Mar. 30, 2013 | Mar. 29, 2014 | Mar. 30, 2013 | Mar. 29, 2014 Class A Common Stock [Member] | Mar. 29, 2014 Class B Common Stock [Member] | Mar. 29, 2014 Common Stock [Member] | Sep. 28, 2013 Common Stock [Member] | Mar. 29, 2014 Additional Paid-In Capital [Member] | Mar. 29, 2014 Retained Earnings [Member] | Mar. 29, 2014 Treasury Stock [Member] | Mar. 29, 2014 Stock Employee Compensation Trust (Sect) [Member] | Mar. 29, 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 |  |  |  |  |  |  |  |  | 4,992 |  |  |  |
Issuance of treasury shares at more than cost |  |  |  |  |  |  |  |  | 431 |  |  |  |
Adjustment To Marker Sect And Other |  |  |  |  |  |  |  |  | 3,936 |  |  |  |
Net earnings | 37,725 | 36,527 | 69,822 | 70,645 |  |  |  |  |  | 69,822 |  |  |
Issuance of treasury shares |  |  |  |  |  |  |  |  |  |  | 766 |  |
Purchase of treasury shares |  |  |  |  |  |  |  |  |  |  | (25,526) |  |
Issuance of stock held by Stock Employee Compensation Trust |  |  |  |  |  |  |  |  |  |  |  | 1,144 |
Purchase of stock held by Stock Employee Compensation Trust |  |  |  |  |  |  |  |  |  |  |  | (4,634) |
Adjustment to market - SECT |  |  |  |  |  |  |  |  |  |  |  | (2,591) |
Other Comprehensive Income (Loss), Net of Tax | 1,287 | (17,916) | 9,111 | (6,901) |  |  |  |  |  |  |  |  | 9,111
End of Period | $ 1,593,216 |  | $ 1,593,216 |  |  |  | $ 51,280 | $ 51,280 | $ 456,837 | $ 1,359,535 | $ (107,763) | $ (41,626) | $ (125,047)
Common Stock, Beginning of Period |  |  |  |  | 43,613,060 | 7,666,653 |  |  |  |  |  |  |
Conversion of Class B to Class A, Shares |  |  |  |  | 3,959 | (3,959) |  |  |  |  |  |  |
Common Stock, End of Period |  |  |  |  | 43,617,019 | 7,662,694 |  |  |  |  |  |  |
Treasury Stock, Beginning of Period |  |  |  |  | (2,004,262) | (3,305,971) |  |  |  |  |  |  |
Issuance of treasury shares, Shares |  |  |  |  | 151,155 | 0 |  |  |  |  |  |  |
Purchase of treasury shares, Shares |  |  |  |  | (396,520) | (3,640) |  |  |  |  |  |  |
Treasury Stock, End of Period |  |  |  |  | (2,249,627) | (3,309,611) |  |  |  |  |  |  |
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 |  |  |  |  |  | (71,905) |  |  |  |  |  |  |
SECT, End of Period |  |  |  |  |  | (663,684) |  |  |  |  |  |  |
TOTAL SHAREHOLDERS' EQUITY, Shares |  |  |  |  | 41,367,392 | 3,689,399 |  |  |  |  |  |  |

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