STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Class A common stock	Class B common stock	Common stock Class A common stock	Common stock Class B common stock	Additional paid-in-capital	Accumulated other comprehensive (loss) income	Retained earnings	Retained earnings Class A common stock	Retained earnings Class B common stock	Treasury stock	Deferred compensation
Balance, beginning of year at Dec. 31, 2020		$ 1,188,048			$ 1,992	$ 178	$ 16,487	$ (78,143)	$ 2,393,624			$ (1,163,670)	$ 17,580
Increase (Decrease) in Shareholders' Equity
Net income		297,860							297,860
Other comprehensive income (loss)		52,855						52,855
Dividends declared			$ (194,687)	$ (1,607)						$ (194,687)	$ (1,607)
Net purchase of treasury stock	[1]	9					9					0
Deferred compensation		0										(5,131)	5,131
Rabbi trust distribution	[2]	0										973	(973)
Balance, end of year at Dec. 31, 2021		1,342,478			1,992	178	16,496	(25,288)	2,495,190			(1,167,828)	21,738
Increase (Decrease) in Shareholders' Equity
Net income		298,569							298,569
Other comprehensive income (loss)		17,874						17,874
Dividends declared			(208,775)	(1,723)						(208,775)	(1,723)
Net purchase of treasury stock	[1]	(15)					(15)					0
Deferred compensation		0										(2,975)	2,975
Rabbi trust distribution	[2]	0										1,854	(1,854)
Balance, end of year at Dec. 31, 2022		1,448,408			1,992	178	16,481	(7,414)	2,583,261			(1,168,949)	22,859
Increase (Decrease) in Shareholders' Equity
Net income		446,061							446,061
Other comprehensive income (loss)		(5,986)						(5,986)
Dividends declared			$ (223,786)	$ (1,847)						$ (223,786)	$ (1,847)
Net purchase of treasury stock	[1]	(15)					(15)					0
Deferred compensation		0										(2,228)	2,228
Rabbi trust distribution	[2]	0										2,012	(2,012)
Balance, end of year at Dec. 31, 2023		$ 1,662,835			$ 1,992	$ 178	$ 16,466	$ (13,400)	$ 2,803,689			$ (1,169,165)	$ 23,075

[1] Net purchases of treasury stock in 2021, 2022 and 2023 include the repurchase of our Class A common stock in the open market that were subsequently distributed to satisfy stock-based compensation awards. See Note 10, "Incentive and Deferred Compensation Plans".

[2] Distributions of our Class A shares were made from the rabbi trust to a retired director and an incentive compensation deferral plan participant in 2021, four incentive compensation deferral plan participants in 2022, and five incentive compensation plan deferral plan participants in 2023 . See Note 10, "Incentive and Deferred Compensation Plans".