Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net income used for calculating basic and diluted income per share	$ 210,939	$ 210,545
Denominator:
Weighted average number of common shares used in the calculation of basic income per share (in shares)	77,357	78,339
Dilutive effect of outstanding awards associated with stock-based compensation plans (in shares)	433	625
Shares used in the calculation of diluted income per share (in shares)	77,790	78,964
Basic income per share (in dollars per share)	$ 2.73	$ 2.69
Diluted income per share (in dollars per share)	$ 2.71	$ 2.67
Antidilutive securities excluded from computation of (loss) income per share (in shares)	200	0