Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) vote $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares	10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Cash distributions (in dollars per share) | $ / shares	$ 0.159	$ 0.118	$ 0.059
Dividends declared | $	$ 17,883	$ 9,414	$ 2,961
Dividends declared (in dollars per share) | $ / shares	$ 0.159	$ 0.118	$ 0.059
Retained Earnings
Class of Stock [Line Items]
Dividends declared | $	$ 17,883	$ 9,414	$ 2,961
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares	750,000,000	750,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Common Stock, Voting Rights, Votes Per Share | vote	1
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares	300,000,000	300,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Shares retired (in shares) | shares	94,900,000
Common Stock, Voting Rights, Votes Per Share | vote	1
Class C Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares	75,000,000	75,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Shares retired (in shares) | shares	42,900,000
Common Stock, Voting Rights, Votes Per Share | vote	10