STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands		Total	Additional paid-in-capital	Accumulated other comprehensive (loss) income	Retained earnings	Treasury stock	Deferred compensation	Class A common stock	Class A common stock Common stock	Class A common stock Retained earnings	Class B common stock	Class B common stock Common stock	Class B common stock Retained earnings
Beginning balance at Dec. 31, 2022		$ 1,448,408	$ 16,481	$ (7,414)	$ 2,583,261	$ (1,168,949)	$ 22,859		$ 1,992			$ 178
Increase (decrease) in shareholders' equity
Net income		86,241			86,241
Other comprehensive income (loss)		7,752		7,752
Dividends declared								$ (54,965)		$ (54,965)	$ (454)		$ (454)
Net purchase of treasury stock	[1]	(15)	(15)			0
Deferred compensation		0				(822)	822
Rabbi trust distribution	[2]	0				416	(416)
Ending balance at Mar. 31, 2023		1,486,967	16,466	338	2,614,083	(1,169,355)	23,265		1,992			178
Beginning balance at Dec. 31, 2022		1,448,408	16,481	(7,414)	2,583,261	(1,168,949)	22,859		1,992			178
Increase (decrease) in shareholders' equity
Net income		335,133
Other comprehensive income (loss)		(5,380)		(5,380)
Ending balance at Sep. 30, 2023		1,611,889	16,466	(12,794)	2,752,137	(1,168,761)	22,671		1,992			178
Beginning balance at Mar. 31, 2023		1,486,967	16,466	338	2,614,083	(1,169,355)	23,265		1,992			178
Increase (decrease) in shareholders' equity
Net income		117,852			117,852
Other comprehensive income (loss)		(4,488)		(4,488)
Dividends declared								(54,965)		(54,965)	(454)		(454)
Net purchase of treasury stock	[1]	0	0			0
Deferred compensation		0				(621)	621
Rabbi trust distribution	[2]	0				1,596	(1,596)
Ending balance at Jun. 30, 2023		1,544,912	16,466	(4,150)	2,676,516	(1,168,380)	22,290		1,992			178
Increase (decrease) in shareholders' equity
Net income		131,040			131,040
Other comprehensive income (loss)		(8,644)		(8,644)
Dividends declared								(54,965)		(54,965)	(454)		(454)
Net purchase of treasury stock	[1]	0	0			0
Deferred compensation		0				(381)	381
Ending balance at Sep. 30, 2023		1,611,889	16,466	(12,794)	2,752,137	(1,168,761)	22,671		1,992			178
Beginning balance at Dec. 31, 2023		1,662,835	16,466	(13,400)	2,803,689	(1,169,165)	23,075		1,992			178
Increase (decrease) in shareholders' equity
Net income		124,552			124,552
Other comprehensive income (loss)		(1,830)		(1,830)
Dividends declared								(58,891)		(58,891)	(486)		(486)
Net purchase of treasury stock	[3]	0	0			0
Deferred compensation		0				(861)	861
Rabbi trust distribution	[4]	0				709	(709)
Ending balance at Mar. 31, 2024		1,726,180	16,466	(15,230)	2,868,864	(1,169,317)	23,227		1,992			178
Beginning balance at Dec. 31, 2023		1,662,835	16,466	(13,400)	2,803,689	(1,169,165)	23,075		1,992			178
Increase (decrease) in shareholders' equity
Net income		448,285
Other comprehensive income (loss)		14,966		14,966
Ending balance at Sep. 30, 2024		1,947,955	16,466	1,566	3,073,843	(1,168,719)	22,629		1,992			178
Beginning balance at Mar. 31, 2024		1,726,180	16,466	(15,230)	2,868,864	(1,169,317)	23,227		1,992			178
Increase (decrease) in shareholders' equity
Net income		163,903			163,903
Other comprehensive income (loss)		(1,893)		(1,893)
Dividends declared								(58,891)		(58,891)	(486)		(486)
Net purchase of treasury stock	[3]	0	0			0
Deferred compensation		0				(518)	518
Rabbi trust distribution	[4]	0				1,538	(1,538)
Ending balance at Jun. 30, 2024		1,828,813	16,466	(17,123)	2,973,390	(1,168,297)	22,207		1,992			178
Increase (decrease) in shareholders' equity
Net income		159,830			159,830
Other comprehensive income (loss)		18,689		18,689
Dividends declared								$ (58,891)		$ (58,891)	$ (486)		$ (486)
Net purchase of treasury stock	[3]	0	0			0
Deferred compensation		0				(422)	422
Ending balance at Sep. 30, 2024		$ 1,947,955	$ 16,466	$ 1,566	$ 3,073,843	$ (1,168,719)	$ 22,629		$ 1,992			$ 178

[1] Net purchase of treasury stock in 2023 includes the repurchase of our Class A common stock in the open market that were subsequently distributed to satisfy stock-based compensation awards.

[2] Distributions of our Class A shares were made from the rabbi trust to five incentive compensation deferral plan participants in 2023.

[3] Net purchase of treasury stock in 2024 includes the repurchase of our Class A common stock in the open market that were subsequently distributed to satisfy stock-based compensation awards.

[4] Distributions of our Class A shares were made from the rabbi trust to five incentive compensation deferral plan participants in 2024.