Earnings per Share - Antidilutive Common Shares (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Class A
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders	528,273	1,077,748	1,704,573	944,025
Class A | Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders	5,623	65,206	7,890	82,811
Class A | Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders	522,650	1,012,542	1,696,683	861,214
Class B
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders	156,947	262,471	170,648	305,588
Class B | Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders	156,947	261,890	170,648	304,881
Class B | Restricted shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities that have been excluded from the computation of diluted net income (loss) per share attributable to common stockholders		581		707