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Accrued Acquisition Liability (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2020 | May 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |  |
Implied interest rate | 1.80% |  |  |  |
Accrued acquisition liability |  |  | $ 32,871 |  | $ 32,673
Interest expense |  |  | 323 | $ 115 |
Partsmaster |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments for purchase | $ 2,300 |  |  |  |
Accrued acquisition liability |  |  | 32,900 |  | $ 32,700
Interest expense |  |  | $ 200 |  |
Forecast | Partsmaster |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments for purchase |  | $ 33,000 |  |  |

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