Pension and Other Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2023

Defined Benefit Pension Plans

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Periodic Benefit Costs

The following table summarizes the components of net periodic benefit cost.

	Three Months Ended			Six Months Ended
	June 30,			June 30,
	2023		2022	2023	2022
	(In thousands)
Service cost	$	27	33	54	66
Interest cost	200		145	399	290
Expected return on plan assets	(310)		(393)	(620)	(787)
Amortization of net loss	69		33	139	67
Net periodic benefit cost	$	(14)	(182)	(28)	(364)

Chairman and President Non-Qualified Defined Benefit Plans

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Periodic Benefit Costs

The following table summarizes the components of net periodic benefit costs for the non-qualified defined benefit plans.

	Three Months Ended			Six Months Ended
	June 30,			June 30,
	2023		2022	2023	2022
	(In thousands)
Service cost	$	204	259	408	519
Interest cost	409		279	817	557
Amortization of prior service cost	15		15	30	30
Amortization of net loss	—		585	—	1,169
Net periodic benefit cost	$	628	1,138	1,255	2,275

Postretirement Employment Plans Other Than Pension

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Periodic Benefit Costs

The following table summarizes the components of net periodic benefit costs.

	Three Months Ended			Six Months Ended
	June 30,			June 30,
	2023		2022	2023	2022
	(In thousands)
Interest cost	$	61	43	122	86
Amortization of net loss	—		52	—	104
Net periodic benefit cost	$	61	95	122	190