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Pension Plans and Other Postretirement Benefits (Tables) | 3 Months Ended
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Dec. 27, 2014
Pension Plans and Other Postretirement Benefits [Abstract] |
Components of net periodic benefit costs | The following table provides the components of net periodic benefit costs:
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | Three Months Ended |  |  | Three Months Ended |
|  | December 27, |  |  | December 28, |  |  | December 27, |  |  | December 28, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Interest cost |  | $ | 1,282 |  |  | $ | 1,443 |  |  | $ | 144 |  |  | $ | 161 |
Expected return on plan assets |  |  | (1,228 | ) |  |  | (1,275 | ) |  |  | — |  |  |  | — |
Amortization of prior service costs |  |  | — |  |  |  | — |  |  |  | (122 | ) |  |  | (122 | )
Amortization of net loss (gain) |  |  | 1,130 |  |  |  | 1,123 |  |  |  | (49 | ) |  |  | (46 | )
Net periodic benefit cost |  | $ | 1,184 |  |  | $ | 1,291 |  |  | $ | (27 | ) |  | $ | (7 | )

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=34716465&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2439-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2410-114920 + Details
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