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Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill And Intangible Assets [Line Items] |  |  |
Gross carrying amount | $ 26,567 | $ 26,567 |
Accumulated amortization | (12,508) | (11,016) |
Net carrying amount | 14,059 | 15,551 | $ 18,752
Goodwill | $ 18,402 | 18,402 | $ 18,402
Customer relationships |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 120 months |  |
Gross carrying amount | $ 25,040 | 25,040 |
Accumulated amortization | (11,373) | (10,016) |
Net carrying amount | $ 13,667 | 15,024 |
Non-compete agreements |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 60 months |  |
Gross carrying amount | $ 303 | 303 |
Accumulated amortization | (240) | (211) |
Net carrying amount | $ 63 | 92 |
Domain names |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 60 months |  |
Gross carrying amount | $ 1,224 | 1,224 |
Accumulated amortization | (895) | (789) |
Net carrying amount | $ 329 | $ 435 |

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