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EMPLOYEE BENEFIT PLANS
6 Months Ended
Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]  
EMPLOYEE BENEFIT PLANS

NOTE 5 - EMPLOYEE BENEFIT PLANS

The Company has a defined benefit pension plan covering substantially all full-time and eligible part-time associates and a Supplemental Executive Retirement Plan (“SERP”) covering its executive officers.

The components of the net periodic benefit cost for the Company's qualified benefit pension plan were as follows:

Three Months Ended June 30,Six Months Ended June 30,
(Dollars in Thousands)2017201620172016
Service Cost$1,688$1,613$3,376$3,226
Interest Cost1,4371,3972,8742,794
Expected Return on Plan Assets(2,006)(1,934)(4,012)(3,870)
Prior Service Cost Amortization5669112139
Net Loss Amortization9538011,9061,602
Net Periodic Benefit Cost$2,128$1,946$4,256$3,891
Discount Rate4.21%4.52%4.21%4.52%
Long-term Rate of Return on Assets7.25%7.50%7.25%7.50%

The components of the net periodic benefit cost for the Company's SERP were as follows:
Three Months Ended June 30,Six Months Ended June 30,
(Dollars in Thousands)2017201620172016
Interest Cost$48$40$96$80
Net Loss Amortization149190298380
Net Periodic Benefit Cost$197$230$394$460
Discount Rate3.92%4.13%3.92%4.13%