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Employee Benefits (Tables) | 6 Months Ended
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Jun. 29, 2013
Employee Benefits [Abstract] |
Schedule of net periodic pension cost |
|  | Second Quarter
|  | Period from March 31, 2013 to June 29, 2013 |  | Period from April 1, 2012 to June 30, 2012
Service cost |  | $ | 548 |  |  | $ | 469 |
Interest cost on projected benefit obligation |  |  | 1,188 |  |  |  | 1,221 |
Expected return on plan assets |  |  | (1,306 | ) |  |  | (1,224 | )
Amortization of unrecognized loss |  |  | 718 |  |  |  | 519 |
Net periodic pension cost |  | $ | 1,148 |  |  | $ | 985 |
|  | Six Months Ended
|  | Period from December 30, 2012 to June 29, 2013 |  | Period from January 1, 2012 to June 30, 2012
Service cost |  | $ | 1,096 |  |  | $ | 938 |
Interest cost on projected benefit obligation |  |  | 2,375 |  |  |  | 2,442 |
Expected return on plan assets |  |  | (2,612 | ) |  |  | (2,448 | )
Amortization of unrecognized loss |  |  | 1,436 |  |  |  | 1,038 |
Net periodic pension cost |  | $ | 2,295 |  |  | $ | 1,970 |

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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=28361610&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=28361610&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=32704760&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=28361610&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=28361610&loc=d3e2410-114920 + Details
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