Postretirement Benefits - Accumulated Other Comprehensive (Income) Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amounts included in accumulated other comprehensive (income) loss
Net actuarial (gain) loss	$ (69,564)	$ 27,524
Prior service cost	12,378	12,201
Net amount not yet recognized	$ (57,186)	$ 39,725

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

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-Publisher FASB
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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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