Earnings (Loss) Per Common Share - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from the calculation of earning per share (in shares)	11,532	16,560
Exchangeable Class B common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from the calculation of earning per share (in shares)	0	3,190
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from the calculation of earning per share (in shares)	199	1,043
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from the calculation of earning per share (in shares)	972	1,966
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive securities excluded from the calculation of earning per share (in shares)	10,361	10,361