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)	(484)
Sale of minority ownership interest in Premion	14,000
Adjustment of redeemable noncontrolling interest to redemption value	857
Ending balance at Jun. 30, 2020	14,373
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)	106,255			106,255
Other comprehensive income, net of tax	2,418				2,418
Total comprehensive income	108,673
Dividends declared	(30,590)			(30,590)
Company stock 401(k) contribution	8,566		(35,719)			44,285
Stock-based awards activity	(9,095)		(79,756)			70,661
Stock-based compensation	7,568		7,568
Adjustment of redeemable noncontrolling interest to redemption value	(857)
Other activity	665		665
Ending balance at Jun. 30, 2020	1,675,307	324,419	140,255	6,729,896	(140,179)	(5,379,084)
Beginning balance at Mar. 31, 2020	14,093
Redeemable noncontrolling interest
Net income (loss)	(374)
Adjustment of redeemable noncontrolling interest to redemption value	654
Ending balance at Jun. 30, 2020	14,373
Beginning balance at Mar. 31, 2020	1,658,256	324,419	152,106	6,725,911	(141,175)	(5,403,005)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	19,947			19,947
Other comprehensive income, net of tax	996				996
Total comprehensive income	20,943
Dividends declared	(15,308)			(15,308)
Company stock 401(k) contribution	3,428		(17,888)			21,316
Stock-based awards activity	(22)		(2,627)			2,605
Stock-based compensation	8,325		8,325
Adjustment of redeemable noncontrolling interest to redemption value	(654)			(654)
Other activity	339		339
Ending balance at Jun. 30, 2020	1,675,307	324,419	140,255	6,729,896	(140,179)	(5,379,084)
Beginning balance at Dec. 31, 2020	14,933
Redeemable noncontrolling interest
Net income (loss)	442
Adjustment of redeemable noncontrolling interest to redemption value	148
Ending balance at Jun. 30, 2021	15,523
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)	219,244			219,244
Other comprehensive income, net of tax	2,472				2,472
Total comprehensive income	221,716
Dividends declared	(36,426)			(36,426)
Company stock 401(k) contribution	9,384		(17,674)	(9,053)		36,111
Stock-based awards activity	(10,522)		(84,509)			73,987
Stock-based compensation	16,172		16,172
Adjustment of redeemable noncontrolling interest to redemption value	(148)			(148)
Other activity	685		685
Ending balance at Jun. 30, 2021	2,258,956	324,419	27,941	7,249,257	(118,604)	(5,224,057)
Beginning balance at Mar. 31, 2021	15,220
Redeemable noncontrolling interest
Net income (loss)	227
Adjustment of redeemable noncontrolling interest to redemption value	76
Ending balance at Jun. 30, 2021	15,523
Beginning balance at Mar. 31, 2021	2,139,338	324,419	27,596	7,151,716	(119,798)	(5,244,595)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	106,627			106,627
Other comprehensive income, net of tax	1,194				1,194
Total comprehensive income	107,821
Dividends declared	43			43
Company stock 401(k) contribution	4,079		(1,420)	(9,053)		14,552
Stock-based awards activity	(4)		(5,990)			5,986
Stock-based compensation	7,410		7,410
Adjustment of redeemable noncontrolling interest to redemption value	(76)			(76)
Other activity	345		345
Ending balance at Jun. 30, 2021	$ 2,258,956	$ 324,419	$ 27,941	$ 7,249,257	$ (118,604)	$ (5,224,057)