| EMPLOYEE BENEFIT PLANS | 3 Months Ended | 
|---|---|
| Mar. 31, 2021 | |
| Compensation and Retirement Disclosure [Abstract] | |
| Employee benefit plans | NOTE 7 - EMPLOYEE BENEFIT PLANS The Company has a defined benefit pension plan covering Supplemental Executive Retirement Plan (“SERP”) and executive officers. December 31, 2019. were not covered by the SERP. The components of the net periodic benefit cost for Three Months Ended March 31,  (Dollars in Thousands)  2021  2020  Service Cost  $  1,743 $  1,457 Interest Cost  1,221 1,411 Expected Return on Plan Assets  (2,787) (2,748) Prior Service Cost Amortization  4 4 Net Loss Amortization  1,691 1,011 Special Termination - 61 Net Periodic Benefit Cost  $  1,872 $  1,196 Discount Rate Used for Benefit Cost  2.88% 3.53% Long-term Rate of Return on Assets  6.75% 7.00% The components of the net periodic benefit cost for the Company's Three Months Ended March 31,  (Dollars in Thousands)  2021  2020  Service Cost  $  9 $  - Interest Cost  $  59 $  72 Prior Service Cost Amortization  19 - Net Loss Amortization  198 247 Net Periodic Benefit Cost  $  285 $  319 Discount Rate Used for Benefit Cost  2.38% 3.16% The service cost component of net periodic benefit cost is reflected income. of income. |