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Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015
Class of Stock |  |  |
Number of common shares issued reflects conversion of Class B to Class A | 37,485 | 28,183 | 11,087
Class A Common Stock |  |  |
Class of Stock |  |  |
Common stock voting rights | one-tenth |  |
Minimum percentage of the board of directors to be elected by class of shares | 25.00% |  |
Class B Common Stock |  |  |
Class of Stock |  |  |
Common stock voting rights | one |  |
Preferred Stock |  |  |
Class of Stock |  |  |
Preferred stock, shares authorized | 10,000,000 |  |
2014 Long Term Incentive Plan |  |  |
Class of Stock |  |  |
Number of shares authorized for awards available for grant | 1,568,220 |  |
Share Repurchase Program |  |  |
Class of Stock |  |  |
Stock repurchase program, remaining number of shares authorized to be repurchased | 3,349,819 |  |
Share Repurchase Program | Class B Common Stock |  |  |
Class of Stock |  |  |
Stock repurchased during period, shares | 2,190 |  |
Stock repurchased during period, value | $ 147 |  |
Share Repurchase Program | Class A and Class B Common Stock |  |  |
Class of Stock |  |  |
Stock repurchased during period, shares |  | 850,546 | 4,795,568
Stock repurchased during period, value |  | $ 39,103 | $ 337,739

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- Definition Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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