Defined Severance Benefits (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Schedule of components of net periodic benefit costs

The following table provides the components of net periodic benefit costs and the portion of these costs charged to expense:

	Three Months Ended March 31,
(in thousands)	2023		2022
Current service costs	$	34,448	$	38,967
Interest cost	3,387		1,704
Amortization of:
Prior service credit	840		906
Net actuarial loss	16		2,905
Net periodic benefit cost	$	38,691	$	44,482