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EMPLOYEE BENEFIT PLANS | 9 Months Ended
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Sep. 30, 2018
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 September 30, |  | Nine Months Ended September 30,
(Dollars in Thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Service Cost | $ | 1,721 |  | $ | 1,688 |  | $ | 5,163 |  | $ | 5,064
Interest Cost |  | 1,415 |  |  | 1,437 |  |  | 4,246 |  |  | 4,312
Expected Return on Plan Assets |  | (2,391) |  |  | (2,006) |  |  | (7,173) |  |  | (6,019)
Prior Service Cost Amortization |  | 50 |  |  | 56 |  |  | 150 |  |  | 167
Net Loss Amortization |  | 918 |  |  | 953 |  |  | 2,754 |  |  | 2,859
Net Periodic Benefit Cost | $ | 1,713 |  | $ | 2,128 |  | $ | 5,140 |  | $ | 6,383
Discount Rate |  | 3.71% |  |  | 4.21% |  |  | 3.71% |  |  | 4.21%
Long-term Rate of Return on Assets |  | 7.25% |  |  | 7.25% |  |  | 7.25% |  |  | 7.25%
The components of the net periodic benefit cost for the Company's SERP were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(Dollars in Thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Interest Cost | $ | 57 |  | $ | 48 |  | $ | 170 |  | $ | 143
Net Loss Amortization |  | 406 |  |  | 149 |  |  | 1,220 |  |  | 448
Net Periodic Benefit Cost | $ | 463 |  | $ | 197 |  | $ | 1,390 |  | $ | 591
Discount Rate |  | 3.53% |  |  | 3.92% |  |  | 3.53% |  |  | 3.92%
The service cost component of net periodic benefit cost is reflected in compensation expense in the accompanying statements of income. The other components of net periodic cost are included in “other” within the n oninterest e xpense category in the statements of income. See Note 1 – Significant Accounting Policies for additional information. During the first nine months of 2018, the Company contributed $23 million (first quarter - $10 million, second quarter - $10 million, third quarter - $3 millio n) to its defined benefit pension plan for the 2017 plan year.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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