Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

The following table presents components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss), on a pre-tax basis:

(Dollars in thousands)	Qualified Pension Plan		Non-Qualified Retirement Plans
Three months ended March 31,	2024	2023	2024	2023
Net Periodic Benefit Cost:
Service cost (1)	$125	$351	$—	$39
Interest cost (2)	833	884	162	176
Expected return on plan assets (2)	(1,028)	(1,147)	—	—
Recognized net actuarial loss (2)	—	—	31	59
Net periodic benefit cost	($70)	$88	$193	$274

(1)Included in salaries and employee benefits expense in the Unaudited Consolidated Statements of Income.

(2)Included in other expenses in the Unaudited Consolidated Statements of Income.

Schedule of Assumptions Used for Net Periodic Benefit Cost

The following table presents the measurement date and weighted-average assumptions used to determine net periodic benefit cost:

	Qualified Pension Plan		Non-Qualified Retirement Plans
For the three months ended March 31,	2024	2023	2024	2023
Measurement date	Dec 31, 2023	Dec 31, 2022	Dec 31, 2023	Dec 31, 2022
Equivalent single discount rate for benefit obligations	4.51%	5.54%	5.15%	5.50%
Equivalent single discount rate for service cost	N/A	5.60	N/A	5.61
Equivalent single discount rate for interest cost	4.51	5.43	5.11	5.40
Expected long-term return on plan assets	4.75	5.25	N/A	N/A
Rate of compensation increase	0.50	5.00	N/A	5.00