Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Deferred Compensation Trust	Deferred Compensation Liability
Beginning Balance at Dec. 31, 2020	$ 3,103,074	$ 206	$ 2,214,426	$ 8,811,120	$ (7,922,678)	$ (16,710)	$ 16,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,236,719			1,236,719
Purchase of common stock for treasury	(1,538,019)				(1,538,019)
Equity-based compensation	58,234		58,234
Proceeds from stock options exercised	142,370		142,370
Treasury stock issued upon option exercise and restricted share vesting			(36,839)		36,839
Ending Balance at Dec. 31, 2021	3,002,378	206	2,378,191	10,047,839	(9,423,858)	(16,710)	16,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,725,575			1,725,575
Purchase of common stock for treasury	(1,500,358)				(1,500,358)
Equity-based compensation	82,537		82,537
Proceeds from stock options exercised	196,717		196,717
Treasury stock issued upon option exercise and restricted share vesting			(57,431)		57,431
Ending Balance at Dec. 31, 2022	3,506,849	206	2,600,014	11,773,414	(10,866,785)	(16,710)	16,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,591,611			1,591,611
Purchase of common stock for treasury	(1,083,751)				(1,083,751)
Equity-based compensation	99,507		99,507
Proceeds from stock options exercised	250,509		250,509
Treasury stock issued upon option exercise and restricted share vesting			(101,502)		101,502
Ending Balance at Dec. 31, 2023	$ 4,364,725	$ 206	$ 2,848,528	$ 13,365,025	$ (11,849,034)	$ (16,710)	$ 16,710