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Business Combinations and Disposals - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Jul. 30, 2020 | Jul. 23, 2020 | May 29, 2020 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill | $ 28,289 |  |  |  | $ 50,120 | $ 28,289 | $ 18,274 |  | $ 21,305
Acquisition related costs |  | $ 3,800 |  |  |  |  |  |  |
Serviz.com, Inc. ("Serviz") Acquisition | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ownership percentage amount |  |  |  | $ 5,000 |  |  |  |  |
Fair Value |  |  |  | 2,724 |  |  |  |  |
Net Assets |  |  |  | $ 1,282 |  |  |  |  |
Gain on divestiture of businesses |  |  |  |  |  | 1,442 |  |  |
Total Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Aggregate consideration paid |  |  |  |  | 27,075 | 17,623 |  |  |
Goodwill | $ 10,176 |  |  |  | 21,831 | $ 10,176 |  |  |
July 23, 2020 Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill to be deductible for income tax purposes |  |  | $ 1,576 |  |  |  |  |  |
Aggregate consideration paid |  |  | 3,790 |  |  |  |  |  |
Goodwill |  |  | $ 1,576 |  |  |  |  |  |
December 31, 2020 Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of shares issued as a part of consideration | 300,000 |  |  |  |  |  |  |  |
Share price | $ 20.00 |  |  |  |  | $ 20.00 |  |  |
Number of additional shares issued | 123,000 |  |  |  |  |  |  |  |
Aggregate consideration paid | $ 12,463 |  |  |  |  |  |  |  |
Goodwill | 7,242 |  |  |  |  | $ 7,242 |  |  |
Other Acquisitions |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill to be deductible for income tax purposes |  |  |  |  |  |  |  | $ 222 |
Aggregate consideration paid |  |  |  |  | 5,496 | 1,370 |  |  |
Goodwill | $ 1,358 |  |  |  | 3,569 | $ 1,358 |  |  |
2019 Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Shares received on divestiture of business | 23,488 |  |  |  |  | 23,488 |  |  |
Aggregate consideration paid |  |  |  |  |  |  | 479 |  |
Definite-lived intangible assets |  |  |  |  |  |  | 340 |  |
Net liabilities |  |  |  |  |  |  | 830 |  |
Goodwill |  |  |  |  |  |  | 969 |  |
2019 Acquisition | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Gain on divestiture of businesses |  |  |  |  |  |  | 4,508 |  |
General and administrative |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  | 401 | $ 247 | 123 |  |
General and administrative | Other Acquisitions |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  | $ 126 |  |  |  |
General and administrative | 2019 Acquisition |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  | $ 123 |  |

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