Earnings Per Share - Computation of diluted earnings per share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total diluted earnings	61,250,000	61,250,000	61,250,000	61,250,000
Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total diluted earnings	21,250,000	21,250,000	21,250,000	21,250,000
Class C common stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total diluted earnings	40,000,000	40,000,000	40,000,000	40,000,000