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Earnings per share - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net income	$ 76,823	$ 39,615
Denominator
Weighted average common shares outstanding for basic earnings per share (shares)	126,941	135,027
Dilutive potential common stock outstanding
Weighted average common shares outstanding for diluted earnings per share (shares)	128,887	137,900
Earnings per share
Basic (USD per share)	$ 0.61	$ 0.29
Diluted (USD per share)	$ 0.60	$ 0.29
Convertible Notes
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	0	232
Stock options
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	1,607	2,173
RSUs, PSUs and ESPP
Dilutive potential common stock outstanding
Dilutive potential common stock outstanding (shares)	339	468

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