Defined Severance Benefits (Tables)

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
(in thousands)	2022		2021		2022		2021
Current service costs	$	33,066	$	32,502	$	109,722	$	95,281
Interest expense	2,446		854		5,777		2,039
Amortization of:
Prior service credit	810		23		2,582		69
Net actuarial loss	298		1,242		5,975		3,260
Net periodic benefit costs charged to expense	$	36,620	$	34,621	$	124,056	$	100,649