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Post-Retirement Health Care | 6 Months Ended
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Jun. 30, 2018
Retirement Benefits [Abstract] |
Post-Retirement Health Care | Post-Retirement Health Care The following table sets forth the components of net periodic benefit costs included in the Condensed Consolidated Statements of Comprehensive Income (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Service cost | $ | 213 |  |  | $ | 186 |  |  | $ | 426 |  |  | $ | 371 |
Interest cost | 197 |  |  | 206 |  |  | 394 |  |  | 412 |
Amortization of net (gain) loss | 26 |  |  | 6 |  |  | 63 |  |  | 13 |
Net periodic post-retirement benefit cost | $ | 436 |  |  | $ | 398 |  |  | $ | 883 |  |  | $ | 796 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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