Retirement Plans and Other Postretirement Benefits - Funded Status of Plan and Amounts Recognized in Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Funded status asset (liability):
Fair value of plan assets	$ 774,329	$ 728,641
Projected benefit obligation	(581,730)	(581,887)
Funded status at the end of the year	192,599	146,754
Amounts recognized in the consolidated balance sheet consisted of:
Non-current asset for pension benefits (other assets)	239,925	192,140
Current liabilities for pension benefits	(2,816)	(2,700)
Non-current liability for pension benefits	(44,510)	(42,686)
Net amount recognized at the end of the year	$ 192,599	$ 146,754

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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