Capital Stock, Repurchase of Common Stock (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Repurchases of Common Stock [Abstract]
Class A common stock repurchased	$ 10,004	$ 10,004	$ 20,010	$ 60,410
Amount available for repurchases	$ 225,400		$ 225,400
Treasury Stock [Member]
Repurchases of Common Stock [Abstract]
Class A common stock repurchased (in shares)	0.2	0.2	0.4	1.2
Class A common stock repurchased	$ 10,004	$ 10,004	$ 20,010	$ 60,410