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INCOME TAXES - Narrative (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | May 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Change in valuation allowance, benefit | $ 54,966 | $ 248 | $ 2,137 | $ 61,317 | $ 4,420 | $ 1,613 |
Valuation allowance | 6,482 | 67,799 |  | 6,482 | 67,799 |  |
Decrease in valuation allowance | 53,644 |  |  | 61,317 | 3,539 |  |
Deferred income tax benefit |  |  |  | (52,288) | (1,244) | 1,250 |
Deferred tax liabilities, goodwill |  |  |  |  |  |  | $ 2,385
Deferred tax (benefit), indefinite lived assets |  |  |  |  | (297) |  |
Net deferred tax asset | 60,251 | 5,934 |  | 60,251 | 5,934 |  |
Net operating loss carryforwards subject to expiration | 92,494 |  |  | 92,494 |  |  |
Net operating loss carryforwards not subject to expiration | 46,453 |  |  | 46,453 |  |  |
State net operating loss carryforwards, state and local | 68,195 |  |  | 68,195 |  |  |
General business credit carryforward | 6,416 |  |  | 6,416 |  |  |
Unrecognized tax benefit net of federal benefit on state issue |  | 1 |  |  | 1 |  |
Uncertain tax positions, accrued interest | 0 | 1 |  | 0 | 1 |  |
Uncertain tax positions, penalties | 0 | 1 |  | 0 | 1 |  |
Accrued income tax expense | (1) | $ (1) |  | (1) | (1) | $ (2) |
Federal |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Net deferred tax asset | 61,163 |  |  | 61,163 |  |  |
State |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Net deferred tax liability | (912) |  |  | (912) |  |  |
Tax credit carryforwards | 2,060 |  |  | 2,060 |  |  |
Goodwill |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Deferred income tax benefit |  |  |  |  | $ (2,385) |  |
Complete Disposal Company, Inc |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Net operating loss carryforwards | $ 1,756 |  |  | $ 1,756 |  |  |

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