CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares |
Mar. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Treasury stock, shares | 3,732,625 | 3,732,625 |
| Class A common stock | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, share authorized (in shares) | 524,173,073 | 524,173,073 |
| Common stock, shares issued (in shares) | 56,282,218 | 55,812,702 |
| Common stock, shares outstanding (in shares) | 52,549,593 | 52,080,077 |
| Class B common stock | ||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, share authorized (in shares) | 51,769,784 | 51,769,784 |
| Common stock, shares issued (in shares) | 51,769,784 | 51,769,784 |
| Common stock, shares outstanding (in shares) | 51,769,784 | 51,769,784 |