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EMPLOYEE BENEFIT PLANS (Tables) | 6 Months Ended
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Jun. 30, 2019
Retirement Benefits [Abstract] |
Components of Net Periodic Benefit Cost | Components of net periodic benefit cost:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30, | ​ | ​
​ | ​ | Pension Benefits | ​ | SERP Benefits | ​ | Pension Benefits | ​ | SERP Benefits | ​ | ​
(dollars in thousands) |  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0
Interest cost | ​ | ​ | 22 | ​ | ​ | 24 | ​ | ​ | 10 | ​ | ​ | 8 | ​ | ​ | 44 | ​ | ​ | 47 | ​ | ​ | 19 | ​ | ​ | 17
Expected return on plan assets | ​ | ​ | (35) | ​ | ​ | (35) | ​ | ​ | (15) | ​ | ​ | (16) | ​ | ​ | (69) | ​ | ​ | (69) | ​ | ​ | (28) | ​ | ​ | (31)
Recognized net actuarial (gain) loss | ​ | ​ | 34 | ​ | ​ | 48 | ​ | ​ | 19 | ​ | ​ | 19 | ​ | ​ | 66 | ​ | ​ | 96 | ​ | ​ | 37 | ​ | ​ | 37
Net pension expense (benefit) | ​ | $ | 21 | ​ | $ | 37 | ​ | $ | 14 | ​ | $ | 11 | ​ | $ | 41 | ​ | $ | 74 | ​ | $ | 28 | ​ | $ | 23
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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