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Debt Financing (Details) - Cash Collateral Security Agreement - Standby Letters of Credit - USD ($) $ in Thousands | Jun. 19, 2019 | Mar. 31, 2020 | Dec. 31, 2019
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Line of Credit Facility [Line Items] |  |  |
Cash collateral, percentage of face amount of outstanding standby letters of credit | 105.00% |  |
Letters of credit, amount outstanding |  | $ 2,984 | $ 2,461
Restricted cash |  | $ 3,133 | $ 2,584
LIBOR |  |  |
Line of Credit Facility [Line Items] |  |  |
Basis spread on variable rate (as percent) | 2.50% |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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