NONCONTROLLING INTERESTS - Narrative (Details) - Nerdy LLC - shares shares in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2024 |
Jun. 30, 2024 |
Sep. 30, 2023 |
Jun. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Noncontrolling Interest [Line Items] | ||||||||
| Common units | 179,915 | 177,672 | 171,622 | 161,319 | 179,915 | 171,622 | 173,672 | 156,602 |
| Legacy Nerdy Holders | ||||||||
| Noncontrolling Interest [Line Items] | ||||||||
| Common units | 64,943 | 65,427 | 67,207 | 65,803 | 64,943 | 67,207 | 67,256 | 65,948 |
| Economic interest, LLC ownership percentage | 36.10% | 36.80% | 39.20% | 40.80% | 36.10% | 39.20% | 38.70% | 42.10% |
| Legacy Nerdy Holders | Class B common stock | ||||||||
| Noncontrolling Interest [Line Items] | ||||||||
| Common units | 64,943 | 64,943 | 67,256 | |||||
| Nerdy Inc. | ||||||||
| Noncontrolling Interest [Line Items] | ||||||||
| Common units | 114,972 | 112,245 | 104,415 | 95,516 | 114,972 | 104,415 | 106,416 | 90,654 |
| Economic interest, LLC ownership percentage | 63.90% | 63.20% | 60.80% | 59.20% | 63.90% | 60.80% | 61.30% | 57.90% |