CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling Interests
Beginning Balance at Dec. 31, 2016	$ 2,553,005	$ 324,419	$ 473,742	$ 7,384,556	$ (161,573)	$ (5,749,726)	$ 281,587
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	215,046			273,744			(58,698)
Redeemable noncontrolling interests	(2,797)						(2,797)
Other comprehensive income (loss), net of tax	54,209			(6,260)	54,650		5,819
Comprehensive income	266,458
Dividends declared	(75,164)			(75,164)
Spin-off of Cars.com	(1,513,881)			(1,513,881)
Distributions to noncontrolling membership shareholders	(22,980)						(22,980)
Treasury stock acquired	(23,480)					(23,480)
Stock-based awards activity	(3,931)		(109,560)			105,629
Stock-based compensation	17,098		17,098
Deconsolidation of CareerBuilder	(202,931)						(202,931)
Other activity	847		847
Ending Balance at Dec. 31, 2017	995,041	324,419	382,127	6,062,995	(106,923)	(5,667,577)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	405,665			405,665
Other comprehensive income (loss), net of tax	(4,743)				(4,743)
Comprehensive income	400,922
Dividends declared	(60,269)			(60,269)
Treasury stock acquired	(5,831)					(5,831)
Stock-based awards activity	(500)		(96,060)			95,560
Stock-based compensation	12,531		12,531
Other activity	2,754		2,754
Ending Balance at Dec. 31, 2018	1,340,924	324,419	301,352	6,429,512	(136,511)	(5,577,848)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	286,235			286,235
Other comprehensive income (loss), net of tax	(6,086)				(6,086)
Comprehensive income	280,149
Dividends declared	(60,659)			(60,659)
Stock-based awards activity	(820)		(51,990)			51,170
Stock-based compensation	20,146		20,146
Other activity	1,079		1,079
Company stock 401(k) contribution	9,558		(23,090)			32,648
Ending Balance at Dec. 31, 2019	$ 1,590,377	$ 324,419	$ 247,497	$ 6,655,088	$ (142,597)	$ (5,494,030)	$ 0