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Noninterest Income and Noninterest Expense | 9 Months Ended
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Sep. 30, 2021
Noninterest Income and Noninterest Expense |
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 and nine months ended September 30, 2021 and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Income line item where recognized in | ​ | Pension Benefits | ​ | Other Benefits
(dollars in thousands) | ​ | the consolidated statements of income |  | 2021 |  | 2020 |  | 2021 |  | 2020
Three Months Ended September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | Salaries and employee benefits | ​ | $ | — | ​ | $ | — | ​ | $ | 218 | ​ | $ | 195
Interest cost | ​ | Other noninterest expense | ​ | ​ | 1,292 | ​ | ​ | 1,639 | ​ | ​ | 116 | ​ | ​ | 156
Expected return on plan assets | ​ | Other noninterest expense | ​ | ​ | (766) | ​ | ​ | (1,206) | ​ | ​ | — | ​ | ​ | —
Prior service credit | ​ | Other noninterest expense | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (12)
Recognized net actuarial loss (gain) | ​ | Other noninterest expense | ​ | ​ | 1,720 | ​ | ​ | 1,474 | ​ | ​ | — | ​ | ​ | (80)
Total net periodic benefit cost | ​ | ​ | ​ | $ | 2,246 | ​ | $ | 1,907 | ​ | $ | 334 | ​ | $ | 259
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | Salaries and employee benefits | ​ | $ | — | ​ | $ | — | ​ | $ | 746 | ​ | $ | 573
Interest cost | ​ | Other noninterest expense | ​ | ​ | 3,754 | ​ | ​ | 4,881 | ​ | ​ | 378 | ​ | ​ | 484
Expected return on plan assets | ​ | Other noninterest expense | ​ | ​ | (2,298) | ​ | ​ | (3,594) | ​ | ​ | — | ​ | ​ | —
Prior service credit | ​ | Other noninterest expense | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (38)
Recognized net actuarial loss (gain) | ​ | Other noninterest expense | ​ | ​ | 5,160 | ​ | ​ | 4,332 | ​ | ​ | — | ​ | ​ | (132)
Total net periodic benefit cost | ​ | ​ | ​ | $ | 6,616 | ​ | $ | 5,619 | ​ | $ | 1,124 | ​ | $ | 887
​ Leases ​ The Company recognized operating lease income related to lease payments of $1.7 million and $1.6 million for the three months ended September 30, 2021 and 2020, respectively, and $5.0 million and $4.7 million for the nine months ended September 30, 2021 and 2020, respectively. In addition, the Company recognized $1.6 million and $1.4 million of lease income related to variable lease payments for the three months ended September 30, 2021 and 2020, respectively, and $4.6 million and $4.3 million for the nine months ended September 30, 2021 and 2020, respectively.

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