Consolidated Statements of Changes in Stockholders' Equity and Redeemable Noncontrolling Interests (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class A common stock dividends	$ 1.88	$ 1.88	$ 2.35
Tax expense (benefit) related to delivery of Class A Common Stock in connection with share-based incentive compensation	$ 1,539	$ (1,010)	$ (4,437)
Tax (expense) benefit on delivery of Class A common stock in connection with business acquisitions			$ 5
Common stock, shares issued	112,766,091	112,766,091
Class A Common Stock [Member]
Common stock, shares issued	112,766,091	112,766,091	112,766,091