Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per Share
Adjustments to net income (in dollars)	$ 0	$ 0	$ 0	$ 0
Antidilutive securities (in shares)	0	353,000	0	352,000
Numerator:
Net income	$ 64,279	$ 65,101	$ 208,713	$ 124,015
Denominator:
Basic: weighted-average shares outstanding (in shares)	128,660,038	129,896,054	129,323,973	129,882,878
Add: weighted-average equity-based awards (in shares)	550,410	189,480	571,338	246,812
Diluted: weighted-average shares outstanding (in shares)	129,210,448	130,085,534	129,895,311	130,129,690
Basic earnings per share (in dollars per share)	$ 0.50	$ 0.50	$ 1.61	$ 0.95
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.50	$ 1.61	$ 0.95