Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 479,936	$ 178,084
Basic weighted-average common shares outstanding	41,875	42,510
Dilutive potential shares issuable from stock options and unvested RSUs	574	1,023
Diluted weighted-average common shares outstanding	42,449	43,533
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	352	96

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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