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Long-Term Debt, Convertible Note (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 4 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 18, 2018 | Feb. 28, 2018 | Mar. 31, 2018 | Apr. 17, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 16, 2016
Convertible Debt [Abstract] |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 0 | $ 7,243 | $ 0 |
Loss on extinguishment of debt |  |  |  |  | $ 0 | $ (7,220) | $ 0 |
Class A Common Stock [Member] |  |  |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |  |  |
Shares issued (in shares) |  | 1,535,652 |  |  |  |  |  |
Convertible Note [Member] |  |  |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |  |  |
Original principal amount |  |  |  |  |  |  |  | $ 210,000
Interest rate |  |  |  |  | 4.75% |  |  |
Debt issuance costs |  |  |  |  | $ 6,600 |  |  |
Additions to deferred financing cost |  |  |  |  | 6,300 |  |  |
Adjustments to additional paid-in capital for debt issuance costs |  |  |  |  | $ 300 |  |  |
Payment for principal and accrued interest | $ 213,400 |  |  |  |  |  |  |
Accrued interest |  |  |  | $ 3,400 |  |  |  |
Loss on extinguishment of debt |  |  | $ (7,200) |  |  |  |  |

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- Definition Adjustment to additional paid in capital for the debt issuance expense related to the equity component of convertible notes. + References No definition available. + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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