Net Income Per Share - Calculation of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 168,239	$ 110,598
Basic:
Weighted average shares (in shares)	109,218	111,424
Diluted:
Weighted average shares (in shares)	109,218	111,424
Dilutive effect of potential common shares (in shares)	1,373	1,072
Diluted weighted average shares (in shares)	110,591	112,496
Net income per share:
Basic (in usd per share)	$ 1.54	$ 0.99
Diluted (in usd per share)	$ 1.52	$ 0.98