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Benefit Plans | 3 Months Ended
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Mar. 31, 2024
Benefit Plans |
Noninterest Income and Noninterest Expense | 15. Noninterest Income and Noninterest Expense ​ Benefit Plans ​ The following table sets forth the components of net periodic benefit cost for the Company’s pension and postretirement benefit plans for the three months ended March 31, 2024 and 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Income line item where recognized in | ​ | Pension Benefits | ​ | Other Benefits
(dollars in thousands) | ​ | the consolidated statements of income |  | 2024 |  | 2023 |  | 2024 |  | 2023
Three Months Ended March 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | Salaries and employee benefits | ​ | $ | — | ​ | $ | — | ​ | $ | 137 | ​ | $ | 147
Interest cost | ​ | Other noninterest expense | ​ | ​ | 1,906 | ​ | ​ | 2,059 | ​ | ​ | 211 | ​ | ​ | 220
Expected return on plan assets | ​ | Other noninterest expense | ​ | ​ | (878) | ​ | ​ | (883) | ​ | ​ | — | ​ | ​ | —
Recognized net actuarial loss (gain) | ​ | Other noninterest expense | ​ | ​ | 503 | ​ | ​ | 719 | ​ | ​ | (322) | ​ | ​ | (379)
Total net periodic benefit cost | ​ | ​ | ​ | $ | 1,531 | ​ | $ | 1,895 | ​ | $ | 26 | ​ | $ | (12)
​ Leases ​ The Company recognized operating lease income related to lease payments of $1.6 million for both the three months ended March 31, 2024 and 2023. In addition, the Company recognized $1.6 million and $1.8 million of lease income related to variable lease payments for the three months ended March 31, 2024 and 2023, respectively.

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