Defined Severance Benefits (Tables)

6 Months Ended

Jun. 30, 2022

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 June 30,				Six Months Ended June 30,
(in thousands)	2022		2021		2022		2021
Current service costs	$	37,689	$	32,224	$	76,656	$	62,779
Interest expense	1,627		591		3,331		1,185
Amortization of:
Prior service credit	866		23		1,772		46
Net actuarial loss	2,772		918		5,677		2,018
Net periodic benefit costs charged to expense	$	42,954	$	33,756	$	87,436	$	66,028