CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Allowance for credit losses on trade accounts receivable	$ 33,935	$ 38,534
Common stock par value (in dollars per share)	$ 86.08
Class A common stock
Current Assets:
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,600,000,000	1,600,000,000
Common stock, shares issued	290,746,692	290,529,607
Common stock, shares outstanding	290,746,692	290,529,607
Class B common stock
Current Assets:
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	238,435,208	238,435,208
Common stock, shares outstanding	238,435,208	238,435,208