Consolidated Statements of Equity And Redeemable Noncontrolling Interest - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Treasury stock
Beginning balance at Dec. 31, 2019	$ 0
Redeemable noncontrolling interest
Net income (loss)	(433)
Sale of minority ownership interest in Premion	14,000
Adjustment of redeemable noncontrolling interest to redemption value	1,086
Ending balance at Sep. 30, 2020	14,653
Beginning balance at Dec. 31, 2019	1,590,377	$ 324,419	$ 247,497	$ 6,655,088	$ (142,597)	$ (5,494,030)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	238,474			238,474
Other comprehensive income, net of tax	3,510				3,510
Total comprehensive income	241,984
Dividends declared	(45,922)			(45,922)
Company stock 401(k) contribution	13,023		(57,606)			70,629
Stock-based awards activity	(9,151)		(80,408)			71,257
Stock-based compensation	12,578		12,578
Adjustment of redeemable noncontrolling interest to redemption value	(1,086)			(1,086)
Other activity	(2,267)		(2,267)
Ending balance at Sep. 30, 2020	1,799,536	324,419	119,794	6,846,554	(139,087)	(5,352,144)
Beginning balance at Jun. 30, 2020	14,373
Redeemable noncontrolling interest
Net income (loss)	51
Adjustment of redeemable noncontrolling interest to redemption value	229
Ending balance at Sep. 30, 2020	14,653
Beginning balance at Jun. 30, 2020	1,675,307	324,419	140,255	6,729,896	(140,179)	(5,379,084)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	132,219			132,219
Other comprehensive income, net of tax	1,092				1,092
Total comprehensive income	133,311
Dividends declared	(15,332)			(15,332)
Company stock 401(k) contribution	4,458		(21,886)			26,344
Stock-based awards activity	(56)		(652)			596
Stock-based compensation	5,010		5,010
Adjustment of redeemable noncontrolling interest to redemption value	(229)			(229)
Other activity	(2,933)		(2,933)
Ending balance at Sep. 30, 2020	1,799,536	324,419	119,794	6,846,554	(139,087)	(5,352,144)
Beginning balance at Dec. 31, 2020	14,933
Redeemable noncontrolling interest
Net income (loss)	861
Adjustment of redeemable noncontrolling interest to redemption value	32
Ending balance at Sep. 30, 2021	15,826
Beginning balance at Dec. 31, 2020	2,058,095	324,419	113,267	7,075,640	(121,076)	(5,334,155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	347,524			347,524
Other comprehensive income, net of tax	44,383				44,383
Total comprehensive income	391,907
Dividends declared	(57,435)			(57,435)
Company stock 401(k) contribution	13,575		(24,437)	(14,271)		52,283
Stock-based awards activity	(10,568)		(85,054)			74,486
Stock-based compensation	23,137		23,137
Adjustment of redeemable noncontrolling interest to redemption value	(32)			(32)
Other activity	1,028		1,028
Ending balance at Sep. 30, 2021	2,419,707	324,419	27,941	7,351,426	(76,693)	(5,207,386)
Beginning balance at Jun. 30, 2021	15,523
Redeemable noncontrolling interest
Net income (loss)	419
Adjustment of redeemable noncontrolling interest to redemption value	(116)
Ending balance at Sep. 30, 2021	15,826
Beginning balance at Jun. 30, 2021	2,258,956	324,419	27,941	7,249,257	(118,604)	(5,224,057)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	128,280			128,280
Other comprehensive income, net of tax	41,911				41,911
Total comprehensive income	170,191
Dividends declared	(21,008)			(21,008)
Company stock 401(k) contribution	4,191		(6,763)	(5,219)		16,173
Stock-based awards activity	(47)		(545)			498
Stock-based compensation	6,965		6,965
Adjustment of redeemable noncontrolling interest to redemption value	116			116
Other activity	343		343
Ending balance at Sep. 30, 2021	$ 2,419,707	$ 324,419	$ 27,941	$ 7,351,426	$ (76,693)	$ (5,207,386)