Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings per Share
Adjustments to net income (in dollars)	$ 0	$ 0	$ 0
Antidilutive securities (in shares)	410,000	0	0
Numerator:
Net income	$ 185,754	$ 284,392	$ 264,394
Denominator:
Basic: weighted-average shares outstanding (in shares)	129,890,225	133,076,489	136,945,134
Add: weighted-average equity-based awards (in shares)	329,852	310,668	166,286
Diluted: weighted-average shares outstanding (in shares)	130,220,077	133,387,157	137,111,420
Basic earnings per share (in dollars per share)	$ 1.43	$ 2.14	$ 1.93
Diluted earnings per share (in dollars per share)	$ 1.43	$ 2.13	$ 1.93