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Benefit Plans | 9 Months Ended
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Sep. 30, 2019
Benefit Plans |
Benefit Plans | ​ 17. Benefit Plans ​ The Company sponsors an unfunded supplemental executive retirement plan (“SERP”) for certain key executives. In March 2019, the Company’s board of directors approved an amendment to the SERP to freeze the SERP, which became effective on July 1, 2019. As a result of the amendment, since the effective date, there have not been any, and there will be no, new accruals of benefits, including service accruals. Existing benefits under the SERP, as of the effective date of the amendment described above, will otherwise continue in accordance with the terms of the SERP. ​ The following table sets forth the components of net periodic benefit cost for the Company’s pension and postretirement benefit plans for the three and nine months ended September 30, 2019 and 2018: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Income line item where recognized in | ​ | Pension Benefits | ​ | Other Benefits
(dollars in thousands) | ​ | the consolidated statements of income |  | 2019 |  | 2018 |  | 2019 |  | 2018
Three Months Ended September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | Salaries and employee benefits | ​ | $ | 18 | ​ | $ | 174 | ​ | $ | 160 | ​ | $ | 80
Interest cost | ​ | Other noninterest expense | ​ | ​ | 2,044 | ​ | ​ | 1,840 | ​ | ​ | 203 | ​ | ​ | 293
Expected return on plan assets | ​ | Other noninterest expense | ​ | ​ | (1,195) | ​ | ​ | (1,318) | ​ | ​ | — | ​ | ​ | —
Prior service credit | ​ | Other noninterest expense | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (107) | ​ | ​ | (108)
Recognized net actuarial loss (gain) | ​ | Other noninterest expense | ​ | ​ | 1,564 | ​ | ​ | 1,829 | ​ | ​ | (76) | ​ | ​ | —
Total net periodic benefit cost | ​ | ​ | ​ | $ | 2,431 | ​ | $ | 2,525 | ​ | $ | 180 | ​ | $ | 265
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | Salaries and employee benefits | ​ | $ | 52 | ​ | $ | 522 | ​ | $ | 478 | ​ | $ | 505
Interest cost | ​ | Other noninterest expense | ​ | ​ | 6,132 | ​ | ​ | 5,429 | ​ | ​ | 615 | ​ | ​ | 662
Expected return on plan assets | ​ | Other noninterest expense | ​ | ​ | (3,585) | ​ | ​ | (3,797) | ​ | ​ | — | ​ | ​ | —
Prior service credit | ​ | Other noninterest expense | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (321) | ​ | ​ | (322)
Recognized net actuarial loss (gain) | ​ | Other noninterest expense | ​ | ​ | 4,692 | ​ | ​ | 5,049 | ​ | ​ | (228) | ​ | ​ | —
Total net periodic benefit cost | ​ | ​ | ​ | $ | 7,291 | ​ | $ | 7,203 | ​ | $ | 544 | ​ | $ | 845
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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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