Condensed Consolidated Statements of Changes in Common Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
As of at Dec. 31, 2020	$ 3,766,393	$ 20,000	$ 388,159	$ 6,804,822	$ 603,314	$ (4,056,993)	$ 7,091
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	112,635			112,635
Net income attributable to noncontrolling interest	0			(185)			185
Change in redemption value of redeemable noncontrolling interest	761		697				64
Distribution to noncontrolling interest	(126)						(126)
Dividends on common stock	(15,106)			(15,106)
Issuance of Class B common stock, net of restricted stock award forfeitures	(104)		(5,188)			5,084
Amortization of unearned stock compensation and stock option expense	1,589		1,589
Other comprehensive (loss) income, net of income taxes	(1,203)				(1,203)
Purchase of redeemable noncontrolling interest	0
As of at Mar. 31, 2021	3,864,839	20,000	385,257	6,902,166	602,111	(4,051,909)	7,214
As of at Dec. 31, 2020	11,928
Increase (Decrease) in Temporary Equity [Roll Forward]
Change in redemption value of redeemable noncontrolling interests	(634)
Purchase of redeemable noncontrolling interest	(3,508)
As of at Mar. 31, 2021	7,786
As of at Dec. 31, 2020	3,766,393	20,000	388,159	6,804,822	603,314	(4,056,993)	7,091
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	268,244
Other comprehensive (loss) income, net of income taxes	(16,249)
As of at Sep. 30, 2021	3,973,738	20,000	388,386	7,042,061	587,065	(4,073,677)	9,903
As of at Dec. 31, 2020	11,928
As of at Sep. 30, 2021	7,412
As of at Mar. 31, 2021	3,864,839	20,000	385,257	6,902,166	602,111	(4,051,909)	7,214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	115,926			115,926
Net income attributable to noncontrolling interest	0			(699)			699
Net loss (income) attributable to redeemable noncontrolling interests	131			131
Change in redemption value of redeemable noncontrolling interest	65						65
Distribution to noncontrolling interest	(152)						(152)
Dividends on common stock	(7,553)			(7,553)
Issuance of Class B common stock, net of restricted stock award forfeitures	(96)		(47)			(49)
Amortization of unearned stock compensation and stock option expense	1,672		1,672
Other comprehensive (loss) income, net of income taxes	1,080				1,080
As of at Jun. 30, 2021	3,975,912	20,000	386,882	7,009,971	603,191	(4,051,958)	7,826
As of at Mar. 31, 2021	7,786
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss) attributable to redeemable noncontrolling interests	(131)
Change in redemption value of redeemable noncontrolling interests	65
As of at Jun. 30, 2021	7,720
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	39,683			39,683
Noncontrolling interest capital contribution	1,750						1,750
Net income attributable to noncontrolling interest	0			(469)			469
Net loss (income) attributable to redeemable noncontrolling interests	372			372
Change in redemption value of redeemable noncontrolling interest	64						64
Distribution to noncontrolling interest	(206)						(206)
Dividends on common stock	(7,496)			(7,496)
Repurchase of Class B Common Stock	(21,840)					(21,840)
Issuance of Class B common stock, net of restricted stock award forfeitures	(67)		(188)			121
Amortization of unearned stock compensation and stock option expense	1,692		1,692
Other comprehensive (loss) income, net of income taxes	(16,126)				(16,126)
As of at Sep. 30, 2021	3,973,738	20,000	388,386	7,042,061	587,065	(4,073,677)	9,903
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss) attributable to redeemable noncontrolling interests	(372)
Change in redemption value of redeemable noncontrolling interests	64
As of at Sep. 30, 2021	7,412
As of at Dec. 31, 2021	4,411,669	20,000	389,456	7,126,761	971,388	(4,108,022)	12,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	96,566			96,566
Net income attributable to noncontrolling interest	0			(986)			986
Net loss (income) attributable to redeemable noncontrolling interests	44			44
Change in redemption value of redeemable noncontrolling interest	64						64
Distribution to noncontrolling interest	(357)						(357)
Dividends on common stock	(15,497)			(15,497)
Repurchase of Class B Common Stock	(9,527)					(9,527)
Issuance of Class B common stock, net of restricted stock award forfeitures	1,437					1,437
Amortization of unearned stock compensation and stock option expense	1,677		1,677
Other comprehensive (loss) income, net of income taxes	(13,135)				(13,135)
As of at Mar. 31, 2022	4,472,941	20,000	391,133	7,206,888	958,253	(4,116,112)	12,779
As of at Dec. 31, 2021	14,311
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss) attributable to redeemable noncontrolling interests	(44)
Change in redemption value of redeemable noncontrolling interests	64
As of at Mar. 31, 2022	14,331
As of at Dec. 31, 2021	4,411,669	20,000	389,456	7,126,761	971,388	(4,108,022)	12,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	63,791
Other comprehensive (loss) income, net of income taxes	(121,569)
As of at Sep. 30, 2022	4,276,961	20,000	394,609	7,156,952	849,819	(4,161,672)	17,253
As of at Dec. 31, 2021	14,311
As of at Sep. 30, 2022	17,625
As of at Mar. 31, 2022	4,472,941	20,000	391,133	7,206,888	958,253	(4,116,112)	12,779
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	(66,615)			(66,615)
Noncontrolling interest capital contribution	140						140
Acquisition of noncontrolling interest	512						512
Net income attributable to noncontrolling interest	0			(929)			929
Acquisition of redeemable noncontrolling interest	0
Net loss (income) attributable to redeemable noncontrolling interests	59			59
Change in redemption value of redeemable noncontrolling interest	64						64
Distribution to noncontrolling interest	(872)						(872)
Dividends on common stock	(7,656)			(7,656)
Repurchase of Class B Common Stock	(24,776)					(24,776)
Issuance of Class B common stock, net of restricted stock award forfeitures	(877)		(462)			(415)
Amortization of unearned stock compensation and stock option expense	2,302		2,302
Other comprehensive (loss) income, net of income taxes	(52,979)				(52,979)
As of at Jun. 30, 2022	4,322,243	20,000	392,973	7,131,747	905,274	(4,141,303)	13,552
As of at Mar. 31, 2022	14,331
Increase (Decrease) in Temporary Equity [Roll Forward]
Acquisition of redeemable noncontrolling interest	2,164
Net income (loss) attributable to redeemable noncontrolling interests	(59)
Change in redemption value of redeemable noncontrolling interests	64
As of at Jun. 30, 2022	16,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	33,840			33,840
Noncontrolling interest capital contribution	2,960						2,960
Redeemable noncontrolling interest capital contribution	0
Net income attributable to noncontrolling interest	0			(1,049)			1,049
Net loss (income) attributable to redeemable noncontrolling interests	(11)			(11)
Change in redemption value of redeemable noncontrolling interest	61						61
Distribution to noncontrolling interest	(369)						(369)
Dividends on common stock	(7,575)			(7,575)
Repurchase of Class B Common Stock	(20,278)					(20,278)
Issuance of Class B common stock, net of restricted stock award forfeitures	(203)		(112)			(91)
Amortization of unearned stock compensation and stock option expense	1,748		1,748
Other comprehensive (loss) income, net of income taxes	(55,455)				(55,455)
As of at Sep. 30, 2022	4,276,961	$ 20,000	$ 394,609	$ 7,156,952	$ 849,819	$ (4,161,672)	$ 17,253
Increase (Decrease) in Temporary Equity [Roll Forward]
Redeemable noncontrolling interest capital contribution	1,050
Net income (loss) attributable to redeemable noncontrolling interests	11
Change in redemption value of redeemable noncontrolling interests	64
As of at Sep. 30, 2022	$ 17,625