Computation of Net Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Computation of Net Earnings per Share
Net income available to common stockholders	$ 47,697	$ 41,614
Weighted average shares of common stock outstanding used in computing basic income per share	32,744	33,245
Incremental options and RSUs	549	729
Weighted average shares of common stock used in computing diluted net income per share	33,293	33,974
Net income per share
Basic	$ 1.46	$ 1.25
Diluted	$ 1.43	$ 1.22
Anti-dilutive common equivalent shares excluded from calculation	1,120	4,706