Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings per Share
Adjustments to net income (in dollars)	$ 0	$ 0	$ 0	$ 0
Antidilutive securities (in shares)		537,000		513,000
Numerator:
Net income	$ 86,741	$ 20,049	$ 144,434	$ 58,914
Denominator:
Basic: weighted-average shares outstanding (in shares)	129,392,339	129,856,730	129,661,228	129,876,218
Add: weighted-average equity-based awards (in shares)	436,508	148,465	503,534	287,504
Diluted: weighted-average shares outstanding (in shares)	129,828,847	130,005,195	130,164,762	130,163,722
Basic earnings per share (in dollars per share)	$ 0.67	$ 0.15	$ 1.11	$ 0.45
Diluted earnings per share (in dollars per share)	$ 0.67	$ 0.15	$ 1.11	$ 0.45