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Computation of Net Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Computation of Net Earnings per Share
Net income available to common stockholders	$ 48,576	$ 50,866	$ 51,595	$ 65,931	$ 61,579	$ 47,697	$ 151,036	$ 175,207
Weighted average shares of common stock outstanding used in computing basic income per share	32,550			32,807			32,595	32,775
Incremental options and RSUs	125			352			185	433
Weighted average shares of common stock used in computing diluted net income per share	32,675			33,159			32,780	33,208
Net income per share
Basic	$ 1.49			$ 2.01			$ 4.63	$ 5.35
Diluted	$ 1.49			$ 1.99			$ 4.61	$ 5.28
Anti-dilutive common equivalent shares excluded from calculation	109,266			734			21,477	2,598

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