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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 31, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Business Acquisition |  |  |  |  |  |  |
Goodwill |  | $ 597,462 |  | $ 597,462 |  | $ 560,332 | $ 557,914
First and second lien debt |  |  |  | 43,529 | $ 5,850 |  |
Knotel, Inc. |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |
Debtor-in-possession facility financing costs | $ 19,800 |  |  |  |  |  |
First and second lien debt | 39,584 |  |  | 39,600 |  |  |
Debtor-in-possession financing | 19,788 |  |  | 19,800 |  |  |
Assumed liability | 7,868 |  |  | 7,900 |  |  |
Goodwill | 37,123 | 37,100 |  | 37,100 |  |  |
Business acquisition, amount deductible for tax |  | 28,100 |  | 28,100 |  |  |
Total consideration transferred | $ 67,240 |  |  |  |  |  |
Business acquisition, pro forma revenue |  | $ 17,500 |  |  |  |  |
Knotel, Inc. | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |
Shares issued as compensation |  |  |  | $ 67,200 |  |  |
2020 Acquisitions |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |
Assumed liability |  |  |  |  |  | 3,590 |
Goodwill |  |  |  |  |  | 6,294 |
Business acquisition, amount deductible for tax |  |  |  |  |  | 2,400 |
Total consideration transferred |  |  |  |  |  | 9,839 |
Business acquisition, contingent non cash consideration, fair value |  |  |  |  |  | 1,300 |
Contingent consideration cash |  |  |  |  |  | 2,200 |
Business acquisition, aggregate revenue contribution |  |  | $ 1,400 |  | $ 3,300 |  |
2020 Acquisitions | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |  |
Assumed liability |  |  |  |  |  | 400 |
First and second lien debt |  |  |  |  |  | $ 5,900 |
Business acquisition, equity interest issued (in shares) |  |  |  |  |  | 104,653 |

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