v3.22.0.1

Earnings Per Share - Computation of Basic and Diluted Net Earnings (Loss) Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 141,642	$ 175,538	$ 183,053	$ 41,189	$ 24,100	$ 21,012	$ 12,347	$ 18,607	$ 541,422	$ 76,067	$ 58,129
Denominator:
Denominator for basic earnings per share – weighted average shares (in shares)									20,439	20,599	20,904
Effect of dilutive securities:
Denominator for diluted earnings per share – weighted average shares (in shares)									20,649	20,653	20,990
Employee stock awards
Effect of dilutive securities:
Employee stock options (in shares)									210	54	86

X

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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