Earnings per share - Schedule Of Common Stock Shares Equivalent Excluded From Calculation Of Diluted Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023
Class B Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method
Antidilutive securities	82,021,389	82,021,389	82,021,389
Stock Option [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method
Antidilutive securities	0	338,935	0
Restricted Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method
Antidilutive securities	404	20,832	508
Performance Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method
Antidilutive securities	1,156	0	0