Defined Severance Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Benefits [Abstract]
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