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BENEFIT PLANS: | 3 Months Ended
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Mar. 31, 2014
BENEFIT PLANS: |
BENEFIT PLANS: | NOTE 8 — BENEFIT PLANS: Post retirement defined benefit plans The Company has two noncontributory defined benefit pension plans covering former salaried employees in the United States and certain former expatriate employees in Peru. Effective October 31, 2000, the Board of Directors amended the qualified pension plan to suspend the accrual of benefits. In addition, the Company´s Mexican subsidiaries have a defined contribution pension plan for salaried employees and a non-contributory defined benefit pension plan for union employees. The components of the net periodic benefit costs for the three months ended March 31, 2014 and 2013 are as follows (in millions):
|  | 2014 |  | 2013 |
Service cost |  | $ | 0.3 |  | $ | 0.3 |
Interest cost |  | 0.3 |  | 0.3 |
Expected return on plan assets |  | (0.9 | ) | (0.9 | )
Amortization of net actuarial gain |  | (0.2 | ) | (0.2 | )
Amortization of net loss (gain) |  | (* | ) | (* | )
Net periodic benefit costs |  | $ | (0.5 | ) | $ | (0.5 | )
(*) amount is lower than $0.1 million Post-retirement Health care plan Peru: The Company adopted a post-retirement health care plan for retired salaried employees eligible for Medicare in 1996. The plan is unfunded. The Company manages the plan and is currently providing health benefits to retirees. The plan is accounted for in accordance with ASC 715 “Compensation retirement benefits.” Mexico: Through 2007, the Buenavista unit provided health care services free of charge to employees and retired unionized employees and their families through its own hospital at the Buenavista unit. In 2011, the Company signed an agreement with the Secretary of Health of the State of Sonora to provide these services to its retired workers and their families. The components of the net periodic benefit cost for the three months ended March 31, 2014 and 2013 are as follows (in millions):
|  | 2014 |  | 2013 |
Interest cost |  | $ | 0.3 |  | $ | 0.4 |
Amortization of net loss (gain) |  | (* | ) | (* | )
Amortization of prior service cost (credit) |  | (* | ) | (* | )
Net periodic benefit cost |  | $ | 0.3 |  | $ | 0.4 |
(*) amount is lower than $0.1 million

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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