Earnings per Share (EPS) - Reconciliation of Net Income and Weighted Average Common Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 681,783	$ 413,041	$ 555,713
Basic weighted average shares outstanding (in shares)	111,164	106,098	97,762
Dilutive effect of nonvested shares (in shares)	391	278	465
Diluted weighted average shares outstanding (in shares)	111,555	106,376	98,227
Basic earnings per share (in dollars per share)	$ 6.13	$ 3.89	$ 5.68
Diluted earnings per share (in dollars per share)	$ 6.11	$ 3.88	$ 5.66