Net Income (loss) per share - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 22,685	$ 91,458	$ 82,793	$ 119,353
Weighted average common shares outstanding for basic net income (loss) per share (shares)	137,937	142,487	137,798	140,201
Weighted average common shares outstanding for diluted net income (loss) per share (shares)	142,216	147,624	141,795	148,096
Net income per share:
Basic (USD per share)	$ 0.16	$ 0.64	$ 0.60	$ 0.85
Diluted (USD per share)	$ 0.16	$ 0.62	$ 0.58	$ 0.81
Convertible Debt Securities
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common stock outstanding (shares)	1,709	1,758	1,484	4,210
Stock options
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common stock outstanding (shares)	2,274	2,932	2,182	3,076
Restricted stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common stock outstanding (shares)	296	447	331	609