XML 33 R24.htm IDEA: XBRL DOCUMENT
v3.23.3

Employee Retirement Plans (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Employee Retirement Plans |
Schedule of company's pension expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022
​ | ​ | (Dollars in thousands)
Service cost | ​ | $ | 116 | ​ | $ | 111 | ​ | $ | 350 | ​ | $ | 334
Interest cost | ​ |  | 658 | ​ |  | 438 | ​ |  | 1,974 | ​ |  | 1,315
Expected return on plan assets | ​ |  | (575) | ​ |  | (751) | ​ |  | (1,726) | ​ |  | (2,253)
Net amortization and deferral | ​ |  | 124 | ​ | ​ | 219 | ​ |  | 372 | ​ |  | 657
Pension expense | ​ | $ | 323 | ​ | $ | 17 | ​ | $ | 970 | ​ | $ | 53

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration