Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 77,222	$ 67,437
Other comprehensive (loss) income:
Foreign currency translation adjustments, before tax	(4,198)	2,469
Income tax benefit	33	22
Foreign currency translation adjustments, net of tax	(4,165)	2,491
Changes in employee benefit related items:
Amortization of prior service cost	1	3
Recognized actuarial gain	6	143
Changes in employee benefit related items	7	146
Income tax (expense)	(1)	(1)
Employee benefit related items, net of tax	6	145
Other comprehensive (loss) income	(4,159)	2,636
Comprehensive income	$ 73,063	$ 70,073