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Retirement Benefit Plans (Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ 960	$ 2,560
Amortization of actuarial loss	(270)	(51)
Amortization of prior service cost	(58)	(58)
Settlements	0	(1,815)
Total recognized in other comprehensive (income) loss	632	636
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	(49)	173
Amortization of actuarial loss	(75)	(44)
Amortization of prior service cost	6	50
Total recognized in other comprehensive (income) loss	$ (118)	$ 179

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan.

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Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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