Defined Severance Benefits - Schedule of Components of Net Periodic Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Current service costs	$ 120,784	$ 70,019	$ 42,097
Interest expense	2,869	1,310	1,061
Prior service cost	90	0	0
Net actuarial loss	4,471	140	0
Curtailments/Settlements	0	0	97
Net periodic benefit cost	$ 128,214	$ 71,469	$ 43,255