Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings (numerator)
Net income attributable to common stockholders	$ 68,424	$ 27,152	$ 163,250	$ 68,353
Shares (denominator)
Weighted average common shares outstanding (basic)	44,986	51,825	44,689	51,563
Dilutive effect of stock options and stock awards outstanding	656	904	818	1,049
Adjusted weighted average common shares outstanding (diluted)	45,642	52,729	45,507	52,612
Earnings per share attributable to common stockholders
Basic	$ 1.52	$ 0.52	$ 3.65	$ 1.33
Diluted	$ 1.50	$ 0.51	$ 3.59	$ 1.30
Stock options and stock awards excluded from EPS calculation because the effect would be anti-dilutive				3