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Commitment and Contingencies - Additional Information (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2018 | Dec. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Jan. 31, 2017
Commitments And Contingencies [Line Items] |  |  |  |  |
Unemployment insurance assessment |  |  |  |  | $ 9,500,000
Fines for insufficient reporting of license plate | $ 28,000,000 |  |  |  |
Loss contingency, agreement amount |  | $ 3,500,000 |  |  |
Minimum |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Contractual obligation |  |  | $ 300,000,000 | $ 150,000,000 |
Purchase obligation, 2019 |  |  | 80,000,000 |  |
Purchase obligation, 2020 |  |  | 80,000,000 |  |
Purchase obligation, 2021 |  |  | $ 80,000,000 |  |

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- Definition Commitments and contingencies. + References No definition available. + Details
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- Definition Regulatory reporting assessment. + References No definition available. + Details
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- Definition Unemployment insurance assessment. + References No definition available. + Details
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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
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- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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- Definition Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the third fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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