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v3.19.3

Debt, Convertible Note (Details) |  |  |  | 3 Months Ended | 4 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 18, 2018 USD ($) | Feb. 28, 2018 shares | Jun. 16, 2016 USD ($) | Mar. 31, 2018 USD ($) | Apr. 17, 2018 USD ($) | Sep. 30, 2019 USD ($) d $ / shares shares | Sep. 30, 2018 USD ($)
Convertible Debt [Abstract] |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  | $ 0 | $ 7,243,000
Loss on extinguishment of debt |  |  |  |  |  | $ 0 | $ (7,220,000)
Class A Common Stock [Member] |  |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |  |
Shares issued (in shares) | shares |  | 1,535,652 |  |  |  |  |
Convertible Note [Member] |  |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |  |
Original principal amount |  |  | $ 210,000,000.0 |  |  |  |
Interest rate |  |  |  |  |  | 4.75% |
Maturity date |  |  |  |  |  | Jun. 15, 2020 |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  | 100.00% |
Threshold percentage of stock price trigger |  |  |  |  |  | 180.00% |
Threshold trading days | d |  |  |  |  |  | 20 |
Threshold final trading days | d |  |  |  |  |  | 3 |
Threshold consecutive trading days | d |  |  |  |  |  | 30 |
Principal amount increments that can be repurchased upon a change in control or termination of trading of common stock |  |  |  |  |  | $ 1,000 |
Principal amount increments that can be converted |  |  |  |  |  | $ 1,000 |
Holding period following issue date before notes can be converted |  |  |  |  |  | 6 months |
Initial conversion rate (in shares) | shares |  |  |  |  |  | 21.5054 |
Initial conversion price (in dollars per share) | $ / shares |  |  |  |  |  | $ 46.50 |
Proceeds from issuance of notes |  |  | 210,000,000.0 |  |  |  |
Liability component of convertible notes |  |  | 199,100,000 |  |  |  |
Equity component of convertible notes allocated to additional paid-in capital |  |  | $ 10,900,000 |  |  |  |
Effective interest rate |  |  |  |  |  | 7.10% |
Debt issuance costs |  |  |  |  |  | $ 6,600,000 |
Additions to deferred financing cost |  |  |  |  |  | 6,300,000 |
Adjustments to additional paid-in capital for debt issuance costs |  |  |  |  |  | $ 300,000 |
Payment for principal and accrued interest | $ 213,400,000 |  |  |  |  |  |
Accrued interest |  |  |  |  | $ 3,400,000 |  |
Loss on extinguishment of debt |  |  |  | $ (7,200,000) |  |  |

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