Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Shareholders' Equity, shares at Dec. 31, 2019		270,235,000
Shareholders' Equity at Dec. 31, 2019	$ 5,458,180	$ 2,702	$ 3,235,149	$ 0	$ (245)	$ 2,220,574
Shareholders' Equity (Accounting Standards Update 2014-09) at Dec. 31, 2019							$ (735)
Shareholders' Equity (Accounting Standards Update 2016-13) at Dec. 31, 2019							$ (735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises, shares		15,000
Stock option exercises	111	$ 1	110
Share issuances, net of cancellations, shares		756,000
Share issuances	4,096	$ 8	4,088
Dividends declared	(135,138)					(135,138)
Share repurchases, shares		(4,542,000)
Share repurchases	(170,676)	$ (46)				(170,630)
Cash paid for shares withheld for taxes	(14,853)		0			(14,853)
Share-based compensation	22,065		22,065
Net income	1,406,839					1,406,839
Other comprehensive income	100				100
Shareholders' Equity, shares at Dec. 31, 2020		266,464,000
Shareholders' Equity at Dec. 31, 2020	6,569,989	$ 2,665	3,261,412		(145)	3,306,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises, shares		1,000
Stock option exercises	11	$ 0	11
Share issuances, net of cancellations, shares		525,000
Share issuances	4,181	$ 5	4,176
Dividends declared	(148,133)					(148,133)
Share repurchases, shares		(17,664,000)
Share repurchases	(897,303)	$ (177)				(897,126)
Cash paid for shares withheld for taxes	(10,842)					(10,842)
Share-based compensation	25,192		25,192
Net income	1,946,320					1,946,320
Other comprehensive income	$ 100				100
Shareholders' Equity, shares at Dec. 31, 2021	249,325,873	249,326,000
Shareholders' Equity at Dec. 31, 2021	$ 7,489,515	$ 2,493	3,290,791		(45)	4,196,276
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share issuances, net of cancellations, shares		676,000
Share issuances	6,031	$ 7	6,024
Dividends declared	(143,134)					(143,134)
Share repurchases, shares		(24,162,000)
Share repurchases	(1,074,673)	$ (242)				(1,074,431)
Cash paid for shares withheld for taxes	(14,326)					(14,326)
Share-based compensation	33,323		33,323
Net income	2,617,317					2,617,317
Other comprehensive income	$ 45				45
Shareholders' Equity, shares at Dec. 31, 2022	225,840,443	225,840,000
Shareholders' Equity at Dec. 31, 2022	$ 8,914,098	$ 2,258	$ 3,330,138		$ 0	$ 5,581,702