STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - 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	Retained earnings	Retained earnings Class A common stock	Retained earnings Class B common stock	Treasury stock	Deferred compensation
Beginning balance 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		73,566							73,566
Other comprehensive (loss) income		(5,289)						(5,289)
Dividends declared:			$ (47,806)	$ (395)						$ (47,806)	$ (395)
Net purchase of treasury stock	[1]	9					9					0
Deferred compensation		0										(846)	846
Rabbi trust distribution	[2]	0										876	(876)
Ending balance at Mar. 31, 2021		1,208,133			1,992	178	16,496	(83,432)	2,418,989			(1,163,640)	17,550
Beginning balance 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		68,619							68,619
Other comprehensive (loss) income		(25,189)						(25,189)
Dividends declared:			$ (51,270)	$ (423)						$ (51,270)	$ (423)
Net purchase of treasury stock	[1]	(15)					(15)					0
Deferred compensation		0										(802)	802
Rabbi trust distribution	[2]	0										298	(298)
Ending balance at Mar. 31, 2022		$ 1,334,200			$ 1,992	$ 178	$ 16,481	$ (50,477)	$ 2,512,116			$ (1,168,332)	$ 22,242

[1] Net purchases of treasury stock in 2022 and 2021 include 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 an incentive compensation deferral plan participant in 2022 and a retired director in 2021.