Computation of Earnings Per Share - Calculations Of Basic And Diluted (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income used for calculating basic and diluted income per share	$ 198,043	$ 295,783	$ 204,925	$ 172,515	$ 493,826	$ 377,440
Denominator:
Weighted average number of common shares used in the calculation of basic income per share (in shares)	79,285		80,271		79,368	81,145
Dilutive effect of outstanding awards associated with stock-based compensation plans (in shares)	535		703		647	866
Shares used in the calculation of diluted income per share (in shares)	79,820		80,974		80,015	82,011
Basic income per share (in dollars per share)	$ 2.50		$ 2.55		$ 6.22	$ 4.65
Diluted income per share (in dollars per share)	$ 2.48		$ 2.53		$ 6.17	$ 4.60