Defined Severance Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Current service costs	$ 36,183	$ 33,066	$ 103,935	$ 109,722
Interest cost	3,749	2,446	10,422	5,777
Amortization of:
Prior service credit	817	810	2,473	2,582
Net actuarial loss	392	298	413	5,975
Net periodic benefit cost	$ 41,141	$ 36,620	$ 117,243	$ 124,056