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Net Periodic Pension Cost | 6 Months Ended
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Jun. 29, 2019
Retirement Benefits [Abstract] |
Net Periodic Pension Cost | Net Periodic Pension Cost The following table shows the components of our net periodic pension cost:
| Three Months Ended |  | Six Months Ended
(In thousands) | June 29, 2019 |  | June 30, 2018 |  | June 29, 2019 |  | June 30, 2018
Service cost | $ | 48 |  |  | $ | 133 |  |  | $ | 161 |  |  | $ | 266 |
Interest cost on projected benefit obligation | 973 |  |  | 963 |  |  | 2,018 |  |  | 1,926 |
Expected return on plan assets | (1,295 | ) |  | (1,327 | ) |  | (2,489 | ) |  | (2,654 | )
Amortization of unrecognized loss | 279 |  |  | 271 |  |  | 580 |  |  | 542 |
Net periodic pension cost | $ | 5 |  |  | $ | 40 |  |  | $ | 270 |  |  | $ | 80 |
During the first six months of fiscal 2019, we renegotiated our collective bargaining agreement with 3 unionized locations. This collective bargaining agreement covers a number of specific items such as wages, medical coverage, and certain other benefit programs, including pension plan participation. As a result of these renegotiations, 38 of the participants in the plan are no longer accruing future years of service under the applicable pension plan, which triggered a curtailment. As a result of the curtailment, we performed a revaluation of plan assets and liabilities. The related pension benefit obligation decreased $0.3 million for the six months ended June 29, 2019, as a result of changes in valuation assumptions. An overall increase in plan asset valuation was accompanied by a decrease to accumulated other comprehensive income of $0.2 million, which was recorded in other comprehensive loss on the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). No intraperiod income tax effect was required to be recorded as a result of the curtailment.

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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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