Accounting Policies - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Net income	$ 575,692	$ 500,412	$ 523,710
Weighted average shares outstanding - basic	87,313	86,833	87,051
Dilutive effect of stock plans	582	553	439
Weighted average shares outstanding - diluted	87,895	87,386	87,490
Basic earnings per share	$ 6.59	$ 5.76	$ 6.02
Diluted earnings per share	$ 6.55	$ 5.73	$ 5.99
Anti-dilutive shares	43	218	300